Analysis

  • max time kernel
    166s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    26-11-2022 12:02

General

  • Target

    8e12fdf27e852fb135f9e5627c2c0b5dfa052f9f9e0f8600b6e5ea6e47678b83.exe

  • Size

    1.5MB

  • MD5

    876454cb19e951b6af7055337bfa0ec2

  • SHA1

    bcf59cd759187283f6929c740bfec43458c215b6

  • SHA256

    8e12fdf27e852fb135f9e5627c2c0b5dfa052f9f9e0f8600b6e5ea6e47678b83

  • SHA512

    253ab1bf8524b64d4427a21793137fd0a68fc56a74239590da4bbf7b271c7fbb1aac71616743acf29f55542753dc1a05f31dda5e56d9af4ba49da133265a83d1

  • SSDEEP

    24576:6kC9Gv9ZgS1BU6WLPICFFcjD+fUtRYWJVxbQzNCpEFU0HkA6cC7y4NWmXd57vIWg:6PPS1fhrtHoTtvev7QWg

Malware Config

Extracted

Credentials

  • Protocol:
    ftp
  • Host:
    www12.subdomain.com
  • Port:
    21
  • Username:
    user1577439
  • Password:
    jetaimeradouane

Signatures

  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 2 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Loads dropped DLL 4 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.

  • Themida packer 9 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 3 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 8 IoCs

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

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8e12fdf27e852fb135f9e5627c2c0b5dfa052f9f9e0f8600b6e5ea6e47678b83.exe
    "C:\Users\Admin\AppData\Local\Temp\8e12fdf27e852fb135f9e5627c2c0b5dfa052f9f9e0f8600b6e5ea6e47678b83.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:668
    • C:\Users\Admin\AppData\Local\Temp\FREE.EXE
      "C:\Users\Admin\AppData\Local\Temp\FREE.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2000
    • C:\Users\Admin\AppData\Local\Temp\SERVER.EXE
      "C:\Users\Admin\AppData\Local\Temp\SERVER.EXE"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:880
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\SysWOW64\explorer.exe"
      2⤵
      • Checks BIOS information in registry
      • Identifies Wine through registry keys
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1756
  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:1324

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    2
    T1112

    Virtualization/Sandbox Evasion

    1
    T1497

    Credential Access

    Credentials in Files

    2
    T1081

    Discovery

    Query Registry

    4
    T1012

    System Information Discovery

    4
    T1082

    Virtualization/Sandbox Evasion

    1
    T1497

    Collection

    Data from Local System

    2
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\FREE.EXE
      Filesize

      56KB

      MD5

      101b079ca4aa9ee593e302455f7e3999

      SHA1

      adff4912a805ca61b46abe54adc676ec2a1ed66b

      SHA256

      05d88c500eae9ff3f95cb674dcf2c8b53dc7f2c338440d957157d387b4193da3

      SHA512

      674b49b30db9e5638e8de4f1bcb5e3706a524d2bb9d36ebf05cb136a685b053515397a084a51688328cf1ed39dff58269befa47898905aa22dd880bfa011e103

    • C:\Users\Admin\AppData\Local\Temp\FREE.EXE
      Filesize

      56KB

      MD5

      101b079ca4aa9ee593e302455f7e3999

      SHA1

      adff4912a805ca61b46abe54adc676ec2a1ed66b

      SHA256

      05d88c500eae9ff3f95cb674dcf2c8b53dc7f2c338440d957157d387b4193da3

      SHA512

      674b49b30db9e5638e8de4f1bcb5e3706a524d2bb9d36ebf05cb136a685b053515397a084a51688328cf1ed39dff58269befa47898905aa22dd880bfa011e103

    • C:\Users\Admin\AppData\Local\Temp\SERVER.EXE
      Filesize

      96KB

      MD5

      d5ca7630edf9bfe6d372ecfec16e1256

      SHA1

      ab931c2c9e38b6a1d056c0cd3b42302be519d8f8

      SHA256

      47816e5c85713dfa1f92ac2afe6dc2cdf3c995efe28e2330b57148322c024f82

      SHA512

      f53262a1d4debd25db7d888cd4fa992282eb01f4e421a30f85919bc69eca20c1806a0043cb77661953c61f305d4156f1b7a20e4d1f58019646a4673ad3d54e76

    • \Users\Admin\AppData\Local\Temp\FREE.EXE
      Filesize

      56KB

      MD5

      101b079ca4aa9ee593e302455f7e3999

      SHA1

      adff4912a805ca61b46abe54adc676ec2a1ed66b

      SHA256

      05d88c500eae9ff3f95cb674dcf2c8b53dc7f2c338440d957157d387b4193da3

      SHA512

      674b49b30db9e5638e8de4f1bcb5e3706a524d2bb9d36ebf05cb136a685b053515397a084a51688328cf1ed39dff58269befa47898905aa22dd880bfa011e103

    • \Users\Admin\AppData\Local\Temp\FREE.EXE
      Filesize

      56KB

      MD5

      101b079ca4aa9ee593e302455f7e3999

      SHA1

      adff4912a805ca61b46abe54adc676ec2a1ed66b

      SHA256

      05d88c500eae9ff3f95cb674dcf2c8b53dc7f2c338440d957157d387b4193da3

      SHA512

      674b49b30db9e5638e8de4f1bcb5e3706a524d2bb9d36ebf05cb136a685b053515397a084a51688328cf1ed39dff58269befa47898905aa22dd880bfa011e103

    • \Users\Admin\AppData\Local\Temp\SERVER.EXE
      Filesize

      96KB

      MD5

      d5ca7630edf9bfe6d372ecfec16e1256

      SHA1

      ab931c2c9e38b6a1d056c0cd3b42302be519d8f8

      SHA256

      47816e5c85713dfa1f92ac2afe6dc2cdf3c995efe28e2330b57148322c024f82

      SHA512

      f53262a1d4debd25db7d888cd4fa992282eb01f4e421a30f85919bc69eca20c1806a0043cb77661953c61f305d4156f1b7a20e4d1f58019646a4673ad3d54e76

    • \Users\Admin\AppData\Local\Temp\SERVER.EXE
      Filesize

      96KB

      MD5

      d5ca7630edf9bfe6d372ecfec16e1256

      SHA1

      ab931c2c9e38b6a1d056c0cd3b42302be519d8f8

      SHA256

      47816e5c85713dfa1f92ac2afe6dc2cdf3c995efe28e2330b57148322c024f82

      SHA512

      f53262a1d4debd25db7d888cd4fa992282eb01f4e421a30f85919bc69eca20c1806a0043cb77661953c61f305d4156f1b7a20e4d1f58019646a4673ad3d54e76

    • memory/668-75-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/668-67-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/668-68-0x0000000005770000-0x0000000005779000-memory.dmp
      Filesize

      36KB

    • memory/668-69-0x0000000005770000-0x0000000005779000-memory.dmp
      Filesize

      36KB

    • memory/668-55-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/668-54-0x0000000075981000-0x0000000075983000-memory.dmp
      Filesize

      8KB

    • memory/880-62-0x0000000000000000-mapping.dmp
    • memory/1324-84-0x000000007FFF0000-0x000000007FFF7000-memory.dmp
      Filesize

      28KB

    • memory/1756-71-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1756-87-0x0000000000401000-0x00000000004AF000-memory.dmp
      Filesize

      696KB

    • memory/1756-73-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1756-76-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1756-77-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1756-79-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1756-80-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1756-91-0x0000000000401000-0x00000000004AF000-memory.dmp
      Filesize

      696KB

    • memory/1756-90-0x0000000000400000-0x0000000000592000-memory.dmp
      Filesize

      1.6MB

    • memory/1756-74-0x00000000004D7014-mapping.dmp
    • memory/2000-58-0x0000000000000000-mapping.dmp
    • memory/2000-88-0x0000000000400000-0x0000000000409000-memory.dmp
      Filesize

      36KB

    • memory/2000-89-0x0000000010000000-0x0000000010013000-memory.dmp
      Filesize

      76KB

    • memory/2000-70-0x0000000000400000-0x0000000000409000-memory.dmp
      Filesize

      36KB

    • memory/2000-82-0x0000000010000000-0x0000000010013000-memory.dmp
      Filesize

      76KB