Analysis Report OFFER.exe

Overview

General Information

Sample Name: OFFER.exe
Analysis ID: 322137
MD5: f0a3b70a92ece3204289b3e1e25c9942
SHA1: 5af0534294c9f5fd1ada722919ec8583f88f2ac9
SHA256: 0a09ec08c850081ffb281f5716859d62093a5f772266503cb67d5e49a4ecd4f4
Tags: NanoCore

Most interesting Screenshot:

Detection

NanoCore
Score: 100
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Yara detected AntiVM_3
Yara detected Nanocore RAT
.NET source code contains potential unpacker
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Contains capabilities to detect virtual machines
Contains functionality to call native functions
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found inlined nop instructions (likely shell or obfuscated code)
May sleep (evasive loops) to hinder dynamic analysis
PE file contains strange resources
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Uses code obfuscation techniques (call, push, ret)
Yara signature match

Classification

AV Detection:

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Antivirus / Scanner detection for submitted sample
Source: OFFER.exe Avira: detected
Antivirus detection for dropped file
Source: C:\Users\user\AppData\Roaming\RplepwTnfZYE.exe Avira: detection malicious, Label: TR/AD.Nanocore.gzsda
Multi AV Scanner detection for dropped file
Source: C:\Users\user\AppData\Roaming\RplepwTnfZYE.exe Virustotal: Detection: 57% Perma Link
Source: C:\Users\user\AppData\Roaming\RplepwTnfZYE.exe Metadefender: Detection: 37% Perma Link
Source: C:\Users\user\AppData\Roaming\RplepwTnfZYE.exe ReversingLabs: Detection: 68%
Multi AV Scanner detection for submitted file
Source: OFFER.exe Virustotal: Detection: 57% Perma Link
Source: OFFER.exe Metadefender: Detection: 37% Perma Link
Source: OFFER.exe ReversingLabs: Detection: 68%
Yara detected Nanocore RAT
Source: Yara match File source: 00000000.00000002.211065928.0000000003EA1000.00000004.00000001.sdmp, type: MEMORY

Software Vulnerabilities:

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Found inlined nop instructions (likely shell or obfuscated code)
Source: C:\Users\user\Desktop\OFFER.exe Code function: 4x nop then jmp 055428F7h 0_2_055427EA

Networking:

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Uses dynamic DNS services
Source: unknown DNS query: name: udochukwu.ddns.net
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.3:49711 -> 37.18.96.19:2323
Source: unknown DNS traffic detected: queries for: udochukwu.ddns.net

E-Banking Fraud:

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Yara detected Nanocore RAT
Source: Yara match File source: 00000000.00000002.211065928.0000000003EA1000.00000004.00000001.sdmp, type: MEMORY

System Summary:

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Malicious sample detected (through community Yara rule)
Source: 00000000.00000002.211065928.0000000003EA1000.00000004.00000001.sdmp, type: MEMORY Matched rule: Detetcs the Nanocore RAT Author: Florian Roth
Source: 00000000.00000002.211065928.0000000003EA1000.00000004.00000001.sdmp, type: MEMORY Matched rule: NanoCore Author: Kevin Breen <kevin@techanarchy.net>
Contains functionality to call native functions
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_05531016 NtQuerySystemInformation, 0_2_05531016
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_05530FE5 NtQuerySystemInformation, 0_2_05530FE5
Detected potential crypto function
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_00723AED 0_2_00723AED
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A209C8 0_2_02A209C8
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A21D2E 0_2_02A21D2E
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A209CD 0_2_02A209CD
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A231D8 0_2_02A231D8
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A28EA8 0_2_02A28EA8
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A28FB2 0_2_02A28FB2
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A22F88 0_2_02A22F88
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A22F77 0_2_02A22F77
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A23C32 0_2_02A23C32
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_02A2E598 0_2_02A2E598
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_00722050 0_2_00722050
PE file contains strange resources
Source: OFFER.exe Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
Source: RplepwTnfZYE.exe.0.dr Static PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
Sample file is different than original file name gathered from version info
Source: OFFER.exe, 00000000.00000000.202703558.00000000007B4000.00000002.00020000.sdmp Binary or memory string: OriginalFilenamemQWh.exe8 vs OFFER.exe
Source: OFFER.exe, 00000000.00000002.212114802.0000000004FF0000.00000002.00000001.sdmp Binary or memory string: OriginalFilenamemscorrc.dllT vs OFFER.exe
Source: OFFER.exe, 00000000.00000002.213553763.0000000005BC0000.00000002.00000001.sdmp Binary or memory string: System.OriginalFileName vs OFFER.exe
Source: OFFER.exe, 00000000.00000002.212759761.0000000005460000.00000004.00000001.sdmp Binary or memory string: OriginalFilenameKedermister.dllT vs OFFER.exe
Source: OFFER.exe, 00000000.00000002.214012672.0000000005CC0000.00000002.00000001.sdmp Binary or memory string: originalfilename vs OFFER.exe
Source: OFFER.exe, 00000000.00000002.214012672.0000000005CC0000.00000002.00000001.sdmp Binary or memory string: OriginalFilenamepropsys.dll.mui@ vs OFFER.exe
Source: OFFER.exe, 00000000.00000002.212203919.0000000005050000.00000004.00000001.sdmp Binary or memory string: OriginalFilenameexag vs OFFER.exe
Source: OFFER.exe, 00000003.00000000.208615410.0000000001024000.00000002.00020000.sdmp Binary or memory string: OriginalFilenamemQWh.exe8 vs OFFER.exe
Source: OFFER.exe Binary or memory string: OriginalFilenamemQWh.exe8 vs OFFER.exe
Yara signature match
Source: 00000000.00000002.211065928.0000000003EA1000.00000004.00000001.sdmp, type: MEMORY Matched rule: Nanocore_RAT_Gen_2 date = 2016-04-22, hash1 = 755f49a4ffef5b1b62f4b5a5de279868c0c1766b528648febf76628f1fe39050, author = Florian Roth, description = Detetcs the Nanocore RAT, license = https://creativecommons.org/licenses/by-nc/4.0/, score = https://www.sentinelone.com/blogs/teaching-an-old-rat-new-tricks/
Source: 00000000.00000002.211065928.0000000003EA1000.00000004.00000001.sdmp, type: MEMORY Matched rule: NanoCore date = 2014/04, filetype = exe, author = Kevin Breen <kevin@techanarchy.net>, maltype = Remote Access Trojan, ref = http://malwareconfig.com/stats/NanoCore
Source: OFFER.exe Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
Source: RplepwTnfZYE.exe.0.dr Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
Source: OFFER.exe, IdManager.cs Cryptographic APIs: 'TransformFinalBlock', 'CreateDecryptor'
Source: RplepwTnfZYE.exe.0.dr, IdManager.cs Cryptographic APIs: 'TransformFinalBlock', 'CreateDecryptor'
Source: 0.2.OFFER.exe.720000.0.unpack, IdManager.cs Cryptographic APIs: 'TransformFinalBlock', 'CreateDecryptor'
Source: 0.0.OFFER.exe.720000.0.unpack, IdManager.cs Cryptographic APIs: 'TransformFinalBlock', 'CreateDecryptor'
Source: 3.0.OFFER.exe.f90000.0.unpack, IdManager.cs Cryptographic APIs: 'TransformFinalBlock', 'CreateDecryptor'
Source: classification engine Classification label: mal100.troj.evad.winEXE@6/5@9/2
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_05530E9A AdjustTokenPrivileges, 0_2_05530E9A
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_05530E63 AdjustTokenPrivileges, 0_2_05530E63
Source: C:\Users\user\Desktop\OFFER.exe File created: C:\Users\user\AppData\Roaming\RplepwTnfZYE.exe Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Mutant created: \Sessions\1\BaseNamedObjects\Global\.net clr networking
Source: C:\Windows\System32\conhost.exe Mutant created: \Sessions\1\BaseNamedObjects\Local\SM0:4084:120:WilError_01
Source: C:\Users\user\Desktop\OFFER.exe Mutant created: \Sessions\1\BaseNamedObjects\Global\{e9662336-59a2-4ebb-989e-7c602bdb23a8}
Source: C:\Users\user\Desktop\OFFER.exe Mutant created: \Sessions\1\BaseNamedObjects\qkUPEOxutgScEw
Source: C:\Users\user\Desktop\OFFER.exe File created: C:\Users\user\AppData\Local\Temp\tmpB5D6.tmp Jump to behavior
Source: OFFER.exe Static PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
Source: C:\Users\user\Desktop\OFFER.exe Section loaded: C:\Windows\assembly\NativeImages_v2.0.50727_32\mscorlib\9603718106bd57ecfbb18fefd769cab4\mscorlib.ni.dll Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Section loaded: C:\Windows\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\sorttbls.nlp Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Section loaded: C:\Windows\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\sortkey.nlp Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Section loaded: C:\Windows\assembly\NativeImages_v2.0.50727_32\mscorlib\9603718106bd57ecfbb18fefd769cab4\mscorlib.ni.dll Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Section loaded: C:\Windows\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\sorttbls.nlp Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Section loaded: C:\Windows\assembly\GAC_32\mscorlib\2.0.0.0__b77a5c561934e089\sortkey.nlp Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe File read: C:\Users\user\Desktop\desktop.ini Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: OFFER.exe Virustotal: Detection: 57%
Source: OFFER.exe Metadefender: Detection: 37%
Source: OFFER.exe ReversingLabs: Detection: 68%
Source: C:\Users\user\Desktop\OFFER.exe File read: C:\Users\user\Desktop\OFFER.exe Jump to behavior
Source: unknown Process created: C:\Users\user\Desktop\OFFER.exe 'C:\Users\user\Desktop\OFFER.exe'
Source: unknown Process created: C:\Windows\SysWOW64\schtasks.exe 'C:\Windows\System32\schtasks.exe' /Create /TN 'Updates\RplepwTnfZYE' /XML 'C:\Users\user\AppData\Local\Temp\tmpB5D6.tmp'
Source: unknown Process created: C:\Windows\System32\conhost.exe C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
Source: unknown Process created: C:\Users\user\Desktop\OFFER.exe C:\Users\user\Desktop\OFFER.exe
Source: C:\Users\user\Desktop\OFFER.exe Process created: C:\Windows\SysWOW64\schtasks.exe 'C:\Windows\System32\schtasks.exe' /Create /TN 'Updates\RplepwTnfZYE' /XML 'C:\Users\user\AppData\Local\Temp\tmpB5D6.tmp' Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process created: C:\Users\user\Desktop\OFFER.exe C:\Users\user\Desktop\OFFER.exe Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{95E15D0A-66E6-93D9-C53C-76E6219D3341}\InProcServer32 Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe File opened: C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorrc.dll Jump to behavior
Source: OFFER.exe Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR
Source: C:\Users\user\Desktop\OFFER.exe File opened: C:\Windows\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.9445_none_d08c58b4442ba54f\MSVCR80.dll Jump to behavior
Source: OFFER.exe Static PE information: NO_SEH, TERMINAL_SERVER_AWARE, DYNAMIC_BASE, NX_COMPAT
Source: Binary string: mscorrc.pdb source: OFFER.exe, 00000000.00000002.212114802.0000000004FF0000.00000002.00000001.sdmp

Data Obfuscation:

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.NET source code contains potential unpacker
Source: OFFER.exe, IdManager.cs .Net Code: Remoting_Identity_IDGuid System.Reflection.Assembly System.Reflection.Assembly::Load(System.Byte[])
Source: RplepwTnfZYE.exe.0.dr, IdManager.cs .Net Code: Remoting_Identity_IDGuid System.Reflection.Assembly System.Reflection.Assembly::Load(System.Byte[])
Source: 0.2.OFFER.exe.720000.0.unpack, IdManager.cs .Net Code: Remoting_Identity_IDGuid System.Reflection.Assembly System.Reflection.Assembly::Load(System.Byte[])
Source: 0.0.OFFER.exe.720000.0.unpack, IdManager.cs .Net Code: Remoting_Identity_IDGuid System.Reflection.Assembly System.Reflection.Assembly::Load(System.Byte[])
Source: 3.0.OFFER.exe.f90000.0.unpack, IdManager.cs .Net Code: Remoting_Identity_IDGuid System.Reflection.Assembly System.Reflection.Assembly::Load(System.Byte[])
Uses code obfuscation techniques (call, push, ret)
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_00EA2010 push eax; retf 0_2_00EA2011
Source: initial sample Static PE information: section name: .text entropy: 7.70065403732
Source: initial sample Static PE information: section name: .text entropy: 7.70065403732

Persistence and Installation Behavior:

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Drops PE files
Source: C:\Users\user\Desktop\OFFER.exe File created: C:\Users\user\AppData\Roaming\RplepwTnfZYE.exe Jump to dropped file

Boot Survival:

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Uses schtasks.exe or at.exe to add and modify task schedules
Source: unknown Process created: C:\Windows\SysWOW64\schtasks.exe 'C:\Windows\System32\schtasks.exe' /Create /TN 'Updates\RplepwTnfZYE' /XML 'C:\Users\user\AppData\Local\Temp\tmpB5D6.tmp'

Hooking and other Techniques for Hiding and Protection:

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Hides that the sample has been downloaded from the Internet (zone.identifier)
Source: C:\Users\user\Desktop\OFFER.exe File opened: C:\Users\user\Desktop\OFFER.exe:Zone.Identifier read attributes | delete Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion:

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Yara detected AntiVM_3
Source: Yara match File source: 00000000.00000002.210666466.0000000002EA1000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: 00000000.00000002.210800137.0000000002F20000.00000004.00000001.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: OFFER.exe PID: 6088, type: MEMORY
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Source: OFFER.exe, 00000000.00000002.210666466.0000000002EA1000.00000004.00000001.sdmp Binary or memory string: SBIEDLL.DLL
Source: OFFER.exe, 00000000.00000002.210666466.0000000002EA1000.00000004.00000001.sdmp Binary or memory string: KERNEL32.DLL.WINE_GET_UNIX_FILE_NAME
Contains capabilities to detect virtual machines
Source: C:\Users\user\Desktop\OFFER.exe File opened / queried: SCSI#CdRom&Ven_NECVMWar&Prod_VMware_SATA_CD00#5&280b647&0&000000#{53f5630d-b6bf-11d0-94f2-00a0c91efb8b} Jump to behavior
Contains long sleeps (>= 3 min)
Source: C:\Users\user\Desktop\OFFER.exe Thread delayed: delay time: 922337203685477 Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Thread delayed: delay time: 922337203685477 Jump to behavior
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Source: C:\Users\user\Desktop\OFFER.exe Window / User API: threadDelayed 647 Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Window / User API: threadDelayed 852 Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Window / User API: foregroundWindowGot 988 Jump to behavior
May sleep (evasive loops) to hinder dynamic analysis
Source: C:\Users\user\Desktop\OFFER.exe TID: 6064 Thread sleep time: -49583s >= -30000s Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe TID: 2796 Thread sleep time: -922337203685477s >= -30000s Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe TID: 5076 Thread sleep time: -1844674407370954s >= -30000s Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe TID: 5072 Thread sleep time: -40000s >= -30000s Jump to behavior
Sample execution stops while process was sleeping (likely an evasion)
Source: C:\Windows\System32\conhost.exe Last function: Thread delayed
Source: OFFER.exe, 00000000.00000002.210666466.0000000002EA1000.00000004.00000001.sdmp Binary or memory string: InstallPathJC:\PROGRAM FILES\VMWARE\VMWARE TOOLS\
Source: OFFER.exe, 00000000.00000002.210666466.0000000002EA1000.00000004.00000001.sdmp Binary or memory string: vmware
Source: OFFER.exe, 00000000.00000002.210666466.0000000002EA1000.00000004.00000001.sdmp Binary or memory string: VMware SVGA II|update users set password = @password where user_id = @user_id
Source: OFFER.exe, 00000000.00000002.210666466.0000000002EA1000.00000004.00000001.sdmp Binary or memory string: VMWAREDSOFTWARE\VMware, Inc.\VMware Tools
Source: C:\Users\user\Desktop\OFFER.exe Process information queried: ProcessInformation Jump to behavior

Anti Debugging:

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Enables debug privileges
Source: C:\Users\user\Desktop\OFFER.exe Process token adjusted: Debug Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process token adjusted: Debug Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Memory allocated: page read and write | page guard Jump to behavior

HIPS / PFW / Operating System Protection Evasion:

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Injects a PE file into a foreign processes
Source: C:\Users\user\Desktop\OFFER.exe Memory written: C:\Users\user\Desktop\OFFER.exe base: 400000 value starts with: 4D5A Jump to behavior
Creates a process in suspended mode (likely to inject code)
Source: C:\Users\user\Desktop\OFFER.exe Process created: C:\Windows\SysWOW64\schtasks.exe 'C:\Windows\System32\schtasks.exe' /Create /TN 'Updates\RplepwTnfZYE' /XML 'C:\Users\user\AppData\Local\Temp\tmpB5D6.tmp' Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Process created: C:\Users\user\Desktop\OFFER.exe C:\Users\user\Desktop\OFFER.exe Jump to behavior
Source: C:\Users\user\Desktop\OFFER.exe Code function: 0_2_00E9AEFE GetUserNameW, 0_2_00E9AEFE
Source: C:\Users\user\Desktop\OFFER.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography MachineGuid Jump to behavior

Stealing of Sensitive Information:

barindex
Yara detected Nanocore RAT
Source: Yara match File source: 00000000.00000002.211065928.0000000003EA1000.00000004.00000001.sdmp, type: MEMORY

Remote Access Functionality:

barindex
Yara detected Nanocore RAT
Source: Yara match File source: 00000000.00000002.211065928.0000000003EA1000.00000004.00000001.sdmp, type: MEMORY
windows-stand
Hide Legend

Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Is Windows Process
  • Number of created Registry Values
  • Number of created Files
  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 322137 Sample: OFFER.exe Startdate: 24/11/2020 Architecture: WINDOWS Score: 100 31 udochukwu.ddns.net 2->31 37 Malicious sample detected (through community Yara rule) 2->37 39 Antivirus detection for dropped file 2->39 41 Antivirus / Scanner detection for submitted sample 2->41 43 10 other signatures 2->43 8 OFFER.exe 7 2->8         started        signatures3 process4 file5 21 C:\Users\user\AppData\...\RplepwTnfZYE.exe, PE32 8->21 dropped 23 C:\Users\...\RplepwTnfZYE.exe:Zone.Identifier, ASCII 8->23 dropped 25 C:\Users\user\AppData\Local\...\tmpB5D6.tmp, XML 8->25 dropped 27 C:\Users\user\AppData\Local\...\OFFER.exe.log, ASCII 8->27 dropped 45 Injects a PE file into a foreign processes 8->45 12 OFFER.exe 8 8->12         started        17 schtasks.exe 1 8->17         started        signatures6 process7 dnsIp8 33 udochukwu.ddns.net 37.18.96.19, 2323 GOKNETTR Netherlands 12->33 35 192.168.2.1 unknown unknown 12->35 29 C:\Users\user\AppData\Roaming\...\run.dat, Non-ISO 12->29 dropped 47 Hides that the sample has been downloaded from the Internet (zone.identifier) 12->47 19 conhost.exe 17->19         started        file9 signatures10 process11
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs

Contacted Public IPs

IP Domain Country Flag ASN ASN Name Malicious
37.18.96.19
 unknown Netherlands
201411 GOKNETTR true

Private
IP
192.168.2.1

Contacted Domains

Name IP Active
udochukwu.ddns.net 37.18.96.19 true