Windows Analysis Report
Stub.exe

Overview

General Information

Sample Name: Stub.exe
Analysis ID: 778238
MD5: da5c4dbbc80ca5da70237ef8bc281476
SHA1: c6689884e4bf3360fceacbdaff09d211cef3a49d
SHA256: 4981bda443713f5cecb9df4d163cd62f1bd038cb897895bb2f81015796676371
Tags: AsyncRATexe
Infos:

Detection

AsyncRAT
Score: 92
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Antivirus / Scanner detection for submitted sample
Malicious sample detected (through community Yara rule)
Yara detected AsyncRAT
Snort IDS alert for network traffic
Yara detected Generic Downloader
C2 URLs / IPs found in malware configuration
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
.NET source code contains potential unpacker
Uses 32bit PE files
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
AV process strings found (often used to terminate AV products)
Queries the volume information (name, serial number etc) of a device
Yara signature match
Antivirus or Machine Learning detection for unpacked file
Sample file is different than original file name gathered from version info
May sleep (evasive loops) to hinder dynamic analysis
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Creates a window with clipboard capturing capabilities
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Contains long sleeps (>= 3 min)
Enables debug privileges

Classification

AV Detection
barindex
Antivirus / Scanner detection for submitted sample
Source: Stub.exe Avira: detected
Machine Learning detection for sample
Source: Stub.exe Joe Sandbox ML: detected
Antivirus or Machine Learning detection for unpacked file
Source: 0.0.Stub.exe.50000.0.unpack Avira: Label: TR/Dropper.Gen
Source: 00000000.00000002.508243418.0000000002511000.00000004.00000800.00020000.00000000.sdmp Malware Configuration Extractor: AsyncRAT {"Server": "egrh.linkpc.net", "Port": "5505", "Version": "| Edit 3LOSH RAT", "MutexName": "AsyncMutex_6SI8OkPnk", "Autorun": "false", "Group": "true"}
Uses 32bit PE files
Source: Stub.exe Static PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE
Source: Stub.exe Static PE information: DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE

Networking
barindex
Snort IDS alert for network traffic
Source: Traffic Snort IDS: 2035595 ET TROJAN Generic AsyncRAT Style SSL Cert 142.202.240.108:5505 -> 192.168.2.3:49689
Source: Traffic Snort IDS: 2030673 ET TROJAN Observed Malicious SSL Cert (AsyncRAT Server) 142.202.240.108:5505 -> 192.168.2.3:49689
Yara detected Generic Downloader
Source: Yara match File source: Stub.exe, type: SAMPLE
Source: Yara match File source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE
C2 URLs / IPs found in malware configuration
Source: Malware configuration extractor URLs: egrh.linkpc.net
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.3:49689 -> 142.202.240.108:5505
Source: Stub.exe, 00000000.00000002.510490105.00000000049AD000.00000004.00000800.00020000.00000000.sdmp String found in binary or memory: http://crl.globalsign.net/root-r2.crl0
Source: Stub.exe, 00000000.00000003.256955733.00000000006A5000.00000004.00000020.00020000.00000000.sdmp, Stub.exe, 00000000.00000002.510364745.0000000004966000.00000004.00000800.00020000.00000000.sdmp String found in binary or memory: http://ctldl.windowsupdate.com/
Source: Stub.exe, 00000000.00000003.256955733.00000000006A5000.00000004.00000020.00020000.00000000.sdmp, Stub.exe, 00000000.00000003.257540314.00000000006A9000.00000004.00000020.00020000.00000000.sdmp, Stub.exe, 00000000.00000003.257743735.00000000006A9000.00000004.00000020.00020000.00000000.sdmp String found in binary or memory: http://ctldl.windowsupdate.com/G
Source: 77EC63BDA74BD0D0E0426DC8F80085060.0.dr String found in binary or memory: http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
Source: Stub.exe, 00000000.00000003.257368805.00000000049B9000.00000004.00000800.00020000.00000000.sdmp String found in binary or memory: http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab33
Source: Stub.exe, 00000000.00000002.508243418.0000000002511000.00000004.00000800.00020000.00000000.sdmp String found in binary or memory: http://schemas.xmlsoap.org/ws/2005/05/identity/claims/name
Source: unknown DNS traffic detected: queries for: egrh.linkpc.net

Key, Mouse, Clipboard, Microphone and Screen Capturing
barindex
Yara detected AsyncRAT
Source: Yara match File source: Stub.exe, type: SAMPLE
Source: Yara match File source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE
Source: Yara match File source: 00000000.00000000.237566508.0000000000052000.00000002.00000001.01000000.00000003.sdmp, type: MEMORY
Source: Yara match File source: 00000000.00000002.508243418.0000000002511000.00000004.00000800.00020000.00000000.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: Stub.exe PID: 5484, type: MEMORYSTR
Creates a window with clipboard capturing capabilities
Source: C:\Users\user\Desktop\Stub.exe Window created: window name: CLIPBRDWNDCLASS Jump to behavior

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: Stub.exe, type: SAMPLE Matched rule: Detects file containing reversed ASEP Autorun registry keys Author: ditekSHen
Source: Stub.exe, type: SAMPLE Matched rule: Windows_Trojan_Asyncrat_11a11ba1 Author: unknown
Source: dump.pcap, type: PCAP Matched rule: Detects AsyncRAT Author: ditekSHen
Source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE Matched rule: Detects file containing reversed ASEP Autorun registry keys Author: ditekSHen
Source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE Matched rule: Windows_Trojan_Asyncrat_11a11ba1 Author: unknown
Source: 00000000.00000002.510364745.0000000004966000.00000004.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects AsyncRAT Author: ditekSHen
Source: 00000000.00000003.474031615.0000000000633000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects AsyncRAT Author: ditekSHen
Source: 00000000.00000002.505594690.0000000000633000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects AsyncRAT Author: ditekSHen
Source: 00000000.00000000.237566508.0000000000052000.00000002.00000001.01000000.00000003.sdmp, type: MEMORY Matched rule: Detects file containing reversed ASEP Autorun registry keys Author: ditekSHen
Source: 00000000.00000003.384798750.000000000061D000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects AsyncRAT Author: ditekSHen
Source: 00000000.00000003.432092160.0000000000631000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects AsyncRAT Author: ditekSHen
Source: 00000000.00000002.508243418.0000000002511000.00000004.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: Detects AsyncRAT Author: ditekSHen
Source: Process Memory Space: Stub.exe PID: 5484, type: MEMORYSTR Matched rule: Detects file containing reversed ASEP Autorun registry keys Author: ditekSHen
Source: Process Memory Space: Stub.exe PID: 5484, type: MEMORYSTR Matched rule: Detects AsyncRAT Author: ditekSHen
Uses 32bit PE files
Source: Stub.exe Static PE information: EXECUTABLE_IMAGE, 32BIT_MACHINE
Yara signature match
Source: Stub.exe, type: SAMPLE Matched rule: INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse author = ditekSHen, description = Detects file containing reversed ASEP Autorun registry keys
Source: Stub.exe, type: SAMPLE Matched rule: Windows_Trojan_Asyncrat_11a11ba1 reference_sample = fe09cd1d13b87c5e970d3cbc1ebc02b1523c0a939f961fc02c1395707af1c6d1, os = windows, severity = x86, creation_date = 2021-08-05, scan_context = file, memory, license = Elastic License v2, threat_name = Windows.Trojan.Asyncrat, fingerprint = 715ede969076cd413cebdfcf0cdda44e3a6feb5343558f18e656f740883b41b8, id = 11a11ba1-c178-4415-9c09-45030b500f50, last_modified = 2021-10-04
Source: dump.pcap, type: PCAP Matched rule: MALWARE_Win_AsyncRAT author = ditekSHen, description = Detects AsyncRAT
Source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE Matched rule: INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse author = ditekSHen, description = Detects file containing reversed ASEP Autorun registry keys
Source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE Matched rule: Windows_Trojan_Asyncrat_11a11ba1 reference_sample = fe09cd1d13b87c5e970d3cbc1ebc02b1523c0a939f961fc02c1395707af1c6d1, os = windows, severity = x86, creation_date = 2021-08-05, scan_context = file, memory, license = Elastic License v2, threat_name = Windows.Trojan.Asyncrat, fingerprint = 715ede969076cd413cebdfcf0cdda44e3a6feb5343558f18e656f740883b41b8, id = 11a11ba1-c178-4415-9c09-45030b500f50, last_modified = 2021-10-04
Source: 00000000.00000002.510364745.0000000004966000.00000004.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_AsyncRAT author = ditekSHen, description = Detects AsyncRAT
Source: 00000000.00000003.474031615.0000000000633000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_AsyncRAT author = ditekSHen, description = Detects AsyncRAT
Source: 00000000.00000002.505594690.0000000000633000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_AsyncRAT author = ditekSHen, description = Detects AsyncRAT
Source: 00000000.00000000.237566508.0000000000052000.00000002.00000001.01000000.00000003.sdmp, type: MEMORY Matched rule: INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse author = ditekSHen, description = Detects file containing reversed ASEP Autorun registry keys
Source: 00000000.00000003.384798750.000000000061D000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_AsyncRAT author = ditekSHen, description = Detects AsyncRAT
Source: 00000000.00000003.432092160.0000000000631000.00000004.00000020.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_AsyncRAT author = ditekSHen, description = Detects AsyncRAT
Source: 00000000.00000002.508243418.0000000002511000.00000004.00000800.00020000.00000000.sdmp, type: MEMORY Matched rule: MALWARE_Win_AsyncRAT author = ditekSHen, description = Detects AsyncRAT
Source: Process Memory Space: Stub.exe PID: 5484, type: MEMORYSTR Matched rule: INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse author = ditekSHen, description = Detects file containing reversed ASEP Autorun registry keys
Source: Process Memory Space: Stub.exe PID: 5484, type: MEMORYSTR Matched rule: MALWARE_Win_AsyncRAT author = ditekSHen, description = Detects AsyncRAT
Sample file is different than original file name gathered from version info
Source: Stub.exe, 00000000.00000002.510626345.0000000004BE9000.00000004.00000010.00020000.00000000.sdmp Binary or memory string: OriginalFilenameUNKNOWN_FILET vs Stub.exe
Detected potential crypto function
Source: C:\Users\user\Desktop\Stub.exe Code function: 0_2_0098C51C 0_2_0098C51C
Source: Stub.exe Static PE information: Section: .text IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
Source: C:\Users\user\Desktop\Stub.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: Stub.exe Static file information: TRID: Win32 Executable (generic) Net Framework (10011505/4) 49.83%
Source: C:\Users\user\Desktop\Stub.exe Section loaded: C:\Windows\assembly\NativeImages_v4.0.30319_32\mscorlib\a152fe02a317a77aeee36903305e8ba6\mscorlib.ni.dll Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CF4CC405-E2C5-4DDD-B3CE-5E7582D8C9FA}\InprocServer32 Jump to behavior
Source: Stub.exe, eGlSQbxmQMrQhm/plUQqHPHKqQ.cs Base64 encoded string: 'laukwBCTjYRoqHFCmAt9kjzyfCkFf18LOnFD55PbbIYaigees0liP+EQECnHEGgsV/dSMIxuUxZJha8SsnKbpA==', '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', 'p42Rw9P9+Tk8A5wcgXvTTvLmyAaoAN9cwYuyTeF3HPgl7vCxVjSJKXIt63zXfXhl9JssOJPQy7miVY7V8uOipM80rTbK5ilj4ixSc875RPH+pXyFp+PLCVVzyt0KQAxPOJTbgDYH+4HpWxN/LlnO6daLV8zcQWBNSmBUJzri9rY4xgIh37Ovi2W1j3WSfmj0QZ3sfsG9lZqjUWY2OHMPGV8PEObiX5eQINLpeFAcPUoSdWQQnUfc/V8zZAba9kJ6pWAuVIuwqkFxIlUE4YaLkAi62vkR954q93jp23xodqQbGhmkQo1CisP7Q6Q+nvSBa9sAMMS2PgATRuVu8os/LsvyILDqUXTUoY/aUwY4Od8CxATfVKc2D68e8vDJ7psRM6f9ldEOuCHMo+SJfm2fsRlGr0bISfCWLsxGRR1cXiNhxQHOAJBFYmd7Ul/kI2KHFODPNtMZT6M9kYXrn3OvW9zweDuQvzbG5R0QnuRhDvJoMGm5sm6Tqhh7g1x1Imf2lMgHV6ILOTijaQA8gDtuQFrytccaw9U66lNAyWf3TDC
Source: 0.0.Stub.exe.50000.0.unpack, eGlSQbxmQMrQhm/plUQqHPHKqQ.cs Base64 encoded string: 'laukwBCTjYRoqHFCmAt9kjzyfCkFf18LOnFD55PbbIYaigees0liP+EQECnHEGgsV/dSMIxuUxZJha8SsnKbpA==', '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', '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
Source: C:\Users\user\Desktop\Stub.exe Mutant created: \Sessions\1\BaseNamedObjects\AsyncMutex_6SI8OkPnk
Source: classification engine Classification label: mal92.troj.evad.winEXE@1/2@1/1
Source: C:\Users\user\Desktop\Stub.exe File read: C:\Windows\System32\drivers\etc\hosts Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe File read: C:\Windows\System32\drivers\etc\hosts Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe File read: C:\Windows\System32\drivers\etc\hosts Jump to behavior
Source: Stub.exe, fPDRbydmMY/ZawhPWlnTeTuyN.cs Security API names: System.Security.Principal.WindowsIdentity System.Security.Principal.WindowsIdentity::GetCurrent()
Source: Stub.exe, fPDRbydmMY/ZawhPWlnTeTuyN.cs Security API names: System.Boolean System.Security.Principal.WindowsPrincipal::IsInRole(System.Security.Principal.WindowsBuiltInRole)
Source: 0.0.Stub.exe.50000.0.unpack, fPDRbydmMY/ZawhPWlnTeTuyN.cs Security API names: System.Security.Principal.WindowsIdentity System.Security.Principal.WindowsIdentity::GetCurrent()
Source: 0.0.Stub.exe.50000.0.unpack, fPDRbydmMY/ZawhPWlnTeTuyN.cs Security API names: System.Boolean System.Security.Principal.WindowsPrincipal::IsInRole(System.Security.Principal.WindowsBuiltInRole)
Source: Stub.exe Static PE information: data directory type: IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR
Source: Stub.exe Static PE information: DYNAMIC_BASE, NX_COMPAT, NO_SEH, TERMINAL_SERVER_AWARE

Data Obfuscation
barindex
.NET source code contains potential unpacker
Source: Stub.exe, ZpwfMOVejXXJG/lzYzeBBbDjkdfho.cs .Net Code: fbPMNBgcthZje System.Reflection.Assembly System.Reflection.Assembly::Load(System.Byte[])
Source: Stub.exe, ZpwfMOVejXXJG/lzYzeBBbDjkdfho.cs .Net Code: QCOFEyuSJQQB System.Reflection.Assembly System.AppDomain::Load(System.Byte[])
Source: Stub.exe, ZpwfMOVejXXJG/lzYzeBBbDjkdfho.cs .Net Code: CeqMJMrYMRORV System.Reflection.Assembly System.AppDomain::Load(System.Byte[])
Source: 0.0.Stub.exe.50000.0.unpack, ZpwfMOVejXXJG/lzYzeBBbDjkdfho.cs .Net Code: fbPMNBgcthZje System.Reflection.Assembly System.Reflection.Assembly::Load(System.Byte[])
Source: 0.0.Stub.exe.50000.0.unpack, ZpwfMOVejXXJG/lzYzeBBbDjkdfho.cs .Net Code: QCOFEyuSJQQB System.Reflection.Assembly System.AppDomain::Load(System.Byte[])
Source: 0.0.Stub.exe.50000.0.unpack, ZpwfMOVejXXJG/lzYzeBBbDjkdfho.cs .Net Code: CeqMJMrYMRORV System.Reflection.Assembly System.AppDomain::Load(System.Byte[])

Boot Survival
barindex
Yara detected AsyncRAT
Source: Yara match File source: Stub.exe, type: SAMPLE
Source: Yara match File source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE
Source: Yara match File source: 00000000.00000000.237566508.0000000000052000.00000002.00000001.01000000.00000003.sdmp, type: MEMORY
Source: Yara match File source: 00000000.00000002.508243418.0000000002511000.00000004.00000800.00020000.00000000.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: Stub.exe PID: 5484, type: MEMORYSTR
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Source: C:\Users\user\Desktop\Stub.exe Registry key monitored for changes: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion
barindex
Yara detected AsyncRAT
Source: Yara match File source: Stub.exe, type: SAMPLE
Source: Yara match File source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE
Source: Yara match File source: 00000000.00000000.237566508.0000000000052000.00000002.00000001.01000000.00000003.sdmp, type: MEMORY
Source: Yara match File source: 00000000.00000002.508243418.0000000002511000.00000004.00000800.00020000.00000000.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: Stub.exe PID: 5484, type: MEMORYSTR
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Source: Stub.exe Binary or memory string: SBIEDLL.DLLM\B(BC1|[13])[A-ZA-HJ-NP-Z0-9]{26,45}\B
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Source: C:\Users\user\Desktop\Stub.exe Window / User API: threadDelayed 9730 Jump to behavior
May sleep (evasive loops) to hinder dynamic analysis
Source: C:\Users\user\Desktop\Stub.exe TID: 5740 Thread sleep time: -30000s >= -30000s Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe TID: 6036 Thread sleep time: -922337203685477s >= -30000s Jump to behavior
Contains long sleeps (>= 3 min)
Source: C:\Users\user\Desktop\Stub.exe Thread delayed: delay time: 922337203685477 Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Process information queried: ProcessInformation Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Thread delayed: delay time: 922337203685477 Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe File Volume queried: C:\ FullSizeInformation Jump to behavior
Source: Stub.exe Binary or memory string: vmware
Source: Stub.exe, 00000000.00000002.511377724.0000000005DD0000.00000004.00000800.00020000.00000000.sdmp Binary or memory string: Hyper-V RAWM
Source: Stub.exe, 00000000.00000002.511377724.0000000005DD0000.00000004.00000800.00020000.00000000.sdmp, Stub.exe, 00000000.00000002.510401327.000000000497F000.00000004.00000800.00020000.00000000.sdmp Binary or memory string: Hyper-V RAW
Enables debug privileges
Source: C:\Users\user\Desktop\Stub.exe Process token adjusted: Debug Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Memory allocated: page read and write | page guard Jump to behavior
Source: Stub.exe, 00000000.00000002.508379142.000000000257D000.00000004.00000800.00020000.00000000.sdmp, Stub.exe, 00000000.00000002.508407256.0000000002588000.00000004.00000800.00020000.00000000.sdmp, Stub.exe, 00000000.00000002.508461952.00000000025AB000.00000004.00000800.00020000.00000000.sdmp Binary or memory string: Program Manager
Queries the volume information (name, serial number etc) of a device
Source: C:\Users\user\Desktop\Stub.exe Queries volume information: C:\Users\user\Desktop\Stub.exe VolumeInformation Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Queries volume information: C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Windows.Forms\v4.0_4.0.0.0__b77a5c561934e089\System.Windows.Forms.dll VolumeInformation Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Queries volume information: C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll VolumeInformation Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Queries volume information: C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Accessibility\v4.0_4.0.0.0__b03f5f7f11d50a3a\Accessibility.dll VolumeInformation Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Queries volume information: C:\Windows\Microsoft.NET\assembly\GAC_MSIL\Microsoft.VisualBasic\v4.0_10.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualBasic.dll VolumeInformation Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Queries volume information: C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Management\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Management.dll VolumeInformation Jump to behavior
Source: C:\Users\user\Desktop\Stub.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography MachineGuid Jump to behavior

Lowering of HIPS / PFW / Operating System Security Settings
barindex
Yara detected AsyncRAT
Source: Yara match File source: Stub.exe, type: SAMPLE
Source: Yara match File source: 0.0.Stub.exe.50000.0.unpack, type: UNPACKEDPE
Source: Yara match File source: 00000000.00000000.237566508.0000000000052000.00000002.00000001.01000000.00000003.sdmp, type: MEMORY
Source: Yara match File source: 00000000.00000002.508243418.0000000002511000.00000004.00000800.00020000.00000000.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: Stub.exe PID: 5484, type: MEMORYSTR
AV process strings found (often used to terminate AV products)
Source: Stub.exe, 00000000.00000002.510401327.000000000497F000.00000004.00000800.00020000.00000000.sdmp, Stub.exe, 00000000.00000003.259928413.0000000005EC8000.00000004.00000800.00020000.00000000.sdmp Binary or memory string: %ProgramFiles%\Windows Defender\MsMpeng.exe
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
Source: C:\Users\user\Desktop\Stub.exe WMI Queries: IWbemServices::ExecQuery - root\SecurityCenter2 : Select * from AntivirusProduct
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 signatures2 2 Behavior Graph ID: 778238 Sample: Stub.exe Startdate: 05/01/2023 Architecture: WINDOWS Score: 92 10 Snort IDS alert for network traffic 2->10 12 Malicious sample detected (through community Yara rule) 2->12 14 Antivirus / Scanner detection for submitted sample 2->14 16 6 other signatures 2->16 5 Stub.exe 2 2->5         started        process3 dnsIp4 8 egrh.linkpc.net 142.202.240.108, 49689, 5505 1GSERVERSUS Reserved 5->8
  • 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
142.202.240.108
 egrh.linkpc.net Reserved
14315 1GSERVERSUS false

Contacted Domains

Name IP Active
egrh.linkpc.net 142.202.240.108 true
windowsupdatebg.s.llnwi.net 41.63.96.128 true

Contacted URLs

Name Malicious Antivirus Detection Reputation
egrh.linkpc.net false
    		high