Loading ...

Play interactive tourEdit tour

Windows Analysis Report n#U00ba410000512664.exe

Overview

General Information

Sample Name:n#U00ba410000512664.exe
Analysis ID:526313
MD5:7c91db57c98a1f0e38ba65ed651b4779
SHA1:28cb0d40a73c1a421a9720808d49da010f9ff4ef
SHA256:12992fe3f998693d92625c53bf5aa6723e87c8c3fb7057dbba4b334742cab376
Tags:exe
Infos:

Most interesting Screenshot:

Detection

GuLoader
Score:68
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Found malware configuration
Yara detected GuLoader
Found potential dummy code loops (likely to delay analysis)
Machine Learning detection for sample
C2 URLs / IPs found in malware configuration
Uses 32bit PE files
Sample file is different than original file name gathered from version info
PE file contains strange resources
Contains functionality to read the PEB
Program does not show much activity (idle)
Uses code obfuscation techniques (call, push, ret)
Contains functionality for execution timing, often used to detect debuggers
Abnormal high CPU Usage
Detected potential crypto function

Classification

Process Tree

  • System is w10x64
  • n#U00ba410000512664.exe (PID: 3232 cmdline: "C:\Users\user\Desktop\n#U00ba410000512664.exe" MD5: 7C91DB57C98A1F0E38BA65ED651B4779)
  • cleanup

Malware Configuration

Threatname: GuLoader

{"Payload URL": "https://drive.google.com/uc?export=downlo_"}

Yara Overview

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000000.00000002.781957449.00000000021F0000.00000040.00000001.sdmpJoeSecurity_GuLoader_2Yara detected GuLoaderJoe Security

    Sigma Overview

    No Sigma rule has matched

    Jbx Signature Overview

    Click to jump to signature section

    Show All Signature Results

    AV Detection:

    barindex
    Found malware configurationShow sources
    Source: 00000000.00000002.781957449.00000000021F0000.00000040.00000001.sdmpMalware Configuration Extractor: GuLoader {"Payload URL": "https://drive.google.com/uc?export=downlo_"}
    Machine Learning detection for sampleShow sources
    Source: n#U00ba410000512664.exeJoe Sandbox ML: detected
    Source: n#U00ba410000512664.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED

    Networking:

    barindex
    C2 URLs / IPs found in malware configurationShow sources
    Source: Malware configuration extractorURLs: https://drive.google.com/uc?export=downlo_
    Source: n#U00ba410000512664.exeString found in binary or memory: http://topqualityfreeware.com
    Source: n#U00ba410000512664.exeString found in binary or memory: http://www.topqualityfreeware.com/
    Source: n#U00ba410000512664.exeStatic PE information: LOCAL_SYMS_STRIPPED, 32BIT_MACHINE, EXECUTABLE_IMAGE, LINE_NUMS_STRIPPED, RELOCS_STRIPPED
    Source: n#U00ba410000512664.exe, 00000000.00000000.252485383.0000000000426000.00000002.00020000.sdmpBinary or memory string: OriginalFilenameObumbration1.exe vs n#U00ba410000512664.exe
    Source: n#U00ba410000512664.exeBinary or memory string: OriginalFilenameObumbration1.exe vs n#U00ba410000512664.exe
    Source: n#U00ba410000512664.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
    Source: n#U00ba410000512664.exeStatic PE information: Resource name: RT_ICON type: GLS_BINARY_LSB_FIRST
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeProcess Stats: CPU usage > 98%
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_004090A6
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_02206B59
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FE22D
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9E78
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9AAB
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F92A8
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FAADB
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FAED8
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_02204AF5
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9314
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F0B33
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FA320
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FA75D
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FA364
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9FAC
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9BD3
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9836
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FAC2E
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9858
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FB044
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FA878
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FD4B3
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FA4CC
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FA0EF
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_02202D07
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9950
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F9D50
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FAD6F
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FB186
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FA9B7
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeFile created: C:\Users\user\AppData\Local\Temp\~DFE27628A3FBE5D858.TMPJump to behavior
    Source: n#U00ba410000512664.exeStatic PE information: Section: .text IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_READ
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeKey opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeSection loaded: C:\Windows\SysWOW64\msvbvm60.dll
    Source: classification engineClassification label: mal68.troj.evad.winEXE@1/1@0/0

    Data Obfuscation:

    barindex
    Yara detected GuLoaderShow sources
    Source: Yara matchFile source: 00000000.00000002.781957449.00000000021F0000.00000040.00000001.sdmp, type: MEMORY
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_00404401 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_00403826 push es; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_004044E5 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_00404584 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_00404599 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_004051BE push dword ptr [esi]; iretd
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_0040665D pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_00404279 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_004062C1 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_004072E1 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_004096FC push eax; iretd
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_00404349 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_00404335 pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_0040633D pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_004067DE pushfd ; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_0040A784 push 18165C0Eh; iretd
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F423B push 81528D88h; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F2644 push ss; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F6E73 push E8000002h; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F5ECB push edi; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F0EF4 push eax; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F5C22 push edi; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F1447 push ds; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F48A7 pushfd ; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F491D pushfd ; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F191A push ebx; retf
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F4924 pushfd ; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F5DDC push edi; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F5DC1 push edi; ret
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeProcess information set: NOOPENFILEERRORBOX
    Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FCAA8 rdtsc

    Anti Debugging:

    barindex
    Found potential dummy code loops (likely to delay analysis)Show sources
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeProcess Stats: CPU usage > 90% for more than 60s
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FC664 mov eax, dword ptr fs:[00000030h]
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_022032C9 mov eax, dword ptr fs:[00000030h]
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021F8730 mov eax, dword ptr fs:[00000030h]
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_0220286B mov eax, dword ptr fs:[00000030h]
    Source: all processesThread injection, dropped files, key value created, disk infection and DNS query: no activity detected
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_021FCAA8 rdtsc
    Source: C:\Users\user\Desktop\n#U00ba410000512664.exeCode function: 0_2_02206B59 RtlAddVectoredExceptionHandler,
    Source: n#U00ba410000512664.exe, 00000000.00000002.781493325.0000000000C70000.00000002.00020000.sdmpBinary or memory string: Shell_TrayWnd
    Source: n#U00ba410000512664.exe, 00000000.00000002.781493325.0000000000C70000.00000002.00020000.sdmpBinary or memory string: Progman
    Source: n#U00ba410000512664.exe, 00000000.00000002.781493325.0000000000C70000.00000002.00020000.sdmpBinary or memory string: SProgram Managerl
    Source: n#U00ba410000512664.exe, 00000000.00000002.781493325.0000000000C70000.00000002.00020000.sdmpBinary or memory string: Shell_TrayWnd,
    Source: n#U00ba410000512664.exe, 00000000.00000002.781493325.0000000000C70000.00000002.00020000.sdmpBinary or memory string: Progmanlock

    Mitre Att&ck Matrix

    Initial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionExfiltrationCommand and ControlNetwork EffectsRemote Service EffectsImpact
    Valid AccountsWindows Management InstrumentationPath InterceptionProcess Injection1Virtualization/Sandbox Evasion11OS Credential DumpingSecurity Software Discovery11Remote ServicesArchive Collected Data1Exfiltration Over Other Network MediumEncrypted Channel1Eavesdrop on Insecure Network CommunicationRemotely Track Device Without AuthorizationModify System Partition
    Default AccountsScheduled Task/JobBoot or Logon Initialization ScriptsBoot or Logon Initialization ScriptsProcess Injection1LSASS MemoryVirtualization/Sandbox Evasion11Remote Desktop ProtocolData from Removable MediaExfiltration Over BluetoothApplication Layer Protocol1Exploit SS7 to Redirect Phone Calls/SMSRemotely Wipe Data Without AuthorizationDevice Lockout
    Domain AccountsAt (Linux)Logon Script (Windows)Logon Script (Windows)Obfuscated Files or Information1Security Account ManagerProcess Discovery1SMB/Windows Admin SharesData from Network Shared DriveAutomated ExfiltrationSteganographyExploit SS7 to Track Device LocationObtain Device Cloud BackupsDelete Device Data
    Local AccountsAt (Windows)Logon Script (Mac)Logon Script (Mac)Binary PaddingNTDSSystem Information Discovery1Distributed Component Object ModelInput CaptureScheduled TransferProtocol ImpersonationSIM Card SwapCarrier Billing Fraud

    Behavior Graph

    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

    Screenshots

    Thumbnails

    This section contains all screenshots as thumbnails, including those not shown in the slideshow.