Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/04/2024, 01:23

General

  • Target
    50e2f39f3cd1a94eed4ef99c12dfaf659fc71070a4978df25ab597efd81af36c.exe
  • Size 347KB
  • Sample240428-br2arsdc5s
  • SHA256 50e2f39f3cd1a94eed4ef99c12dfaf659fc71070a4978df25ab597efd81af36c
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • stealc

C2
  • http://185.172.128.62

Attributes
  • url_path

    /902e53a07830e030.php

Signatures

  • Detect ZGRat V1 3 IoCs
  • SectopRAT

    SectopRAT is a remote access trojan first seen in November 2019.

  • SectopRAT payload 1 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Detect binaries embedding considerable number of MFA browser extension IDs. 3 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 3 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 3 IoCs
  • Detects encrypted or obfuscated .NET executables 1 IoCs
  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 2 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 32 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Suspicious use of SendNotifyMessage 7 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\50e2f39f3cd1a94eed4ef99c12dfaf659fc71070a4978df25ab597efd81af36c.exe
    "C:\Users\Admin\AppData\Local\Temp\50e2f39f3cd1a94eed4ef99c12dfaf659fc71070a4978df25ab597efd81af36c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4584
    • C:\Users\Admin\AppData\Local\Temp\u3jc.0.exe
      "C:\Users\Admin\AppData\Local\Temp\u3jc.0.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:32
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 32 -s 2360
        3⤵
        • Program crash
        PID:4072
    • C:\Users\Admin\AppData\Local\Temp\u3jc.2\run.exe
      "C:\Users\Admin\AppData\Local\Temp\u3jc.2\run.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3916
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\SysWOW64\cmd.exe
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:2932
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:4988
    • C:\Users\Admin\AppData\Local\Temp\u3jc.3.exe
      "C:\Users\Admin\AppData\Local\Temp\u3jc.3.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:1708
      • C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
        "C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe" /eieci=11A12794-499E-4FA0-A281-A9A9AA8B2685 /eipi=5488CB36-BE62-4606-B07B-2EE938868BD1
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2692
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 1056
      2⤵
      • Program crash
      PID:4700
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4584 -ip 4584
    1⤵
      PID:4136
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 32 -ip 32
      1⤵
        PID:3500

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            Are.docx

            • Path C:\ProgramData\Are.docx
            • Size 11KB
            • SHA256 5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
            • MD5 SHA1 SHA512 SSDEEP

            mozglue.dll

            • Path C:\ProgramData\mozglue.dll
            • Size 593KB
            • SHA256 ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
            • MD5 SHA1 SHA512 SSDEEP

            nss3.dll

            • Path C:\ProgramData\nss3.dll
            • Size 2.0MB
            • SHA256 ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
            • MD5 SHA1 SHA512 SSDEEP

            d02beef8

            • Path C:\Users\Admin\AppData\Local\Temp\d02beef8
            • Size 1.4MB
            • SHA256 79530d96906f7e9ca5bdc526ee279f63c252dd911bd815b41551afd8d7d00e38
            • MD5 SHA1 SHA512 SSDEEP

            tmpE948.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmpE948.tmp
            • Size 20KB
            • SHA256 5644546ecefc6786c7be5b1a89e935e640963ccd34b130f21baab9370cb9055d
            • MD5 SHA1 SHA512 SSDEEP

            tmpE96A.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmpE96A.tmp
            • Size 20KB
            • SHA256 d76e7512e496b7c8d9fcd3010a55e2e566881dc6dacaf0343652a4915d47829f
            • MD5 SHA1 SHA512 SSDEEP

            u3jc.0.exe

            • Path C:\Users\Admin\AppData\Local\Temp\u3jc.0.exe
            • Size 226KB
            • SHA256 eeaa177b0bc2d85cf8b416c2ed3b85fd50bd7c811bf41a32d161a10a767c2fda
            • MD5 SHA1 SHA512 SSDEEP

            u3jc.1.zip

            • Path C:\Users\Admin\AppData\Local\Temp\u3jc.1.zip
            • Size 3.7MB
            • SHA256 a1dd547a63b256aa6a16871ed03f8b025226f7617e67b8817a08444df077b001
            • MD5 SHA1 SHA512 SSDEEP

            UIxMarketPlugin.dll

            • Path C:\Users\Admin\AppData\Local\Temp\u3jc.2\UIxMarketPlugin.dll
            • Size 1.6MB
            • SHA256 cbcea8f28d8916219d1e8b0a8ca2db17e338eb812431bc4ad0cb36c06fd67f15
            • MD5 SHA1 SHA512 SSDEEP

            bunch.dat

            • Path C:\Users\Admin\AppData\Local\Temp\u3jc.2\bunch.dat
            • Size 1.3MB
            • SHA256 9387488f9d338e211be2cb45109bf590a5070180bc0d4a703f70d3cb3c4e1742
            • MD5 SHA1 SHA512 SSDEEP

            relay.dll

            • Path C:\Users\Admin\AppData\Local\Temp\u3jc.2\relay.dll
            • Size 1.5MB
            • SHA256 7b2db9c88f60ed6dd24b1dec321a304564780fdb191a96ec35c051856128f1ed
            • MD5 SHA1 SHA512 SSDEEP

            run.exe

            • Path C:\Users\Admin\AppData\Local\Temp\u3jc.2\run.exe
            • Size 2.4MB
            • SHA256 a05b592a971fe5011554013bcfe9a4aaf9cfc633bdd1fe3a8197f213d557b8d3
            • MD5 SHA1 SHA512 SSDEEP

            whale.dbf

            • Path C:\Users\Admin\AppData\Local\Temp\u3jc.2\whale.dbf
            • Size 85KB
            • SHA256 b440170853bdb43b66497f701aee2901080326975140b095a1669cb9dee13422
            • MD5 SHA1 SHA512 SSDEEP

            u3jc.3.exe

            • Path C:\Users\Admin\AppData\Local\Temp\u3jc.3.exe
            • Size 4.6MB
            • SHA256 4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7
            • MD5 SHA1 SHA512 SSDEEP

            memory/32-144-0x0000000061E00000-0x0000000061EF3000-memory.dmp

            memory/32-125-0x0000000000AA0000-0x0000000000BA0000-memory.dmp

            memory/32-267-0x0000000000400000-0x000000000083A000-memory.dmp

            memory/32-167-0x0000000000400000-0x000000000083A000-memory.dmp

            memory/32-197-0x0000000000400000-0x000000000083A000-memory.dmp

            memory/1708-195-0x0000000000400000-0x00000000008AD000-memory.dmp

            memory/1708-192-0x0000000000400000-0x00000000008AD000-memory.dmp

            memory/2692-220-0x000001D96A300000-0x000001D96A30E000-memory.dmp

            memory/2692-230-0x000001D96B1C0000-0x000001D96B1CC000-memory.dmp

            memory/2692-253-0x000001D96B290000-0x000001D96B2AE000-memory.dmp

            memory/2692-198-0x000001D965960000-0x000001D965A70000-memory.dmp

            memory/2692-199-0x000001D94B7A0000-0x000001D94B7B0000-memory.dmp

            memory/2692-200-0x000001D964090000-0x000001D96409C000-memory.dmp

            memory/2692-201-0x000001D94B7B0000-0x000001D94B7C4000-memory.dmp

            memory/2692-202-0x000001D965A70000-0x000001D965A94000-memory.dmp

            memory/2692-206-0x000001D9640A0000-0x000001D9640AA000-memory.dmp

            memory/2692-207-0x000001D965D20000-0x000001D965DD2000-memory.dmp

            memory/2692-208-0x000001D965A90000-0x000001D965ABA000-memory.dmp

            memory/2692-209-0x000001D965DD0000-0x000001D965E4A000-memory.dmp

            memory/2692-210-0x000001D965E50000-0x000001D965EB2000-memory.dmp

            memory/2692-211-0x000001D965F30000-0x000001D965FA6000-memory.dmp

            memory/2692-212-0x000001D965940000-0x000001D96594A000-memory.dmp

            memory/2692-216-0x000001D965FB0000-0x000001D9662B0000-memory.dmp

            memory/2692-218-0x000001D969C30000-0x000001D969C38000-memory.dmp

            memory/2692-219-0x000001D96A330000-0x000001D96A368000-memory.dmp

            memory/2692-234-0x000001D96B260000-0x000001D96B282000-memory.dmp

            memory/2692-221-0x000001D96B440000-0x000001D96B44A000-memory.dmp

            memory/2692-222-0x000001D96B450000-0x000001D96B472000-memory.dmp

            memory/2692-226-0x000001D96B9A0000-0x000001D96BEC8000-memory.dmp

            memory/2692-229-0x000001D96B210000-0x000001D96B260000-memory.dmp

            memory/2692-196-0x000001D946260000-0x000001D949B58000-memory.dmp

            memory/2932-241-0x0000000072950000-0x0000000072ACB000-memory.dmp

            memory/2932-178-0x00007FFA09AB0000-0x00007FFA09CA5000-memory.dmp

            memory/3916-126-0x0000000072950000-0x0000000072ACB000-memory.dmp

            memory/3916-99-0x00007FFA09AB0000-0x00007FFA09CA5000-memory.dmp

            memory/3916-98-0x0000000072950000-0x0000000072ACB000-memory.dmp

            memory/4584-120-0x0000000000400000-0x0000000002B15000-memory.dmp

            memory/4584-2-0x0000000002CA0000-0x0000000002D0D000-memory.dmp

            memory/4584-1-0x0000000002D30000-0x0000000002E30000-memory.dmp

            memory/4584-3-0x0000000000400000-0x0000000002B15000-memory.dmp

            memory/4988-270-0x0000000005A60000-0x0000000006004000-memory.dmp

            memory/4988-269-0x0000000005410000-0x00000000054A2000-memory.dmp

            memory/4988-271-0x0000000005780000-0x0000000005942000-memory.dmp

            memory/4988-272-0x00000000054B0000-0x0000000005526000-memory.dmp

            memory/4988-273-0x0000000005530000-0x0000000005580000-memory.dmp

            memory/4988-274-0x00000000053B0000-0x00000000053BA000-memory.dmp

            memory/4988-275-0x0000000006640000-0x0000000006B6C000-memory.dmp

            memory/4988-276-0x0000000006140000-0x000000000615E000-memory.dmp

            memory/4988-277-0x0000000006230000-0x0000000006296000-memory.dmp

            memory/4988-268-0x0000000000D00000-0x0000000000DC6000-memory.dmp

            memory/4988-264-0x0000000070E40000-0x0000000072094000-memory.dmp

            memory/4988-296-0x0000000007B00000-0x0000000007B0A000-memory.dmp