Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-01-2025 04:33

General

  • Target

    bitbot_v2.8_SETUP.exe

  • Size

    394KB

  • MD5

    83b9c0ccfc41bcf9900d13d3de74ba3b

  • SHA1

    d2dddf0c6c5e6ce45f3ebf3d89826ed64fdab610

  • SHA256

    32b7afcb5c386847d67df435dd1ee685d7afa39bc0fac4437f054c5546af25dd

  • SHA512

    2181189443bda3126c4e2335d355454eee3c9576292fd9485dc75839c04cf64dc0f13c58db52f202f513d5ff342c688ca1b44f013db66d68423d22b0b5caa139

  • SSDEEP

    6144:gMU81mKGzOr2+krxLCPy95PNbyIn+dmge0qOxS+NfMA90ZnMaN/j:gMdmKWOa+wxWPiPNbDfCS+FMA90ZnD/

Malware Config

Extracted

Family

darkcomet

Botnet

Day1

C2

epicdust.servecounterstrike.com:1604

Mutex

DC_MUTEX-FE50JVD

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    85dtHfaBqD8E

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • UPX packed file 10 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 52 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bitbot_v2.8_SETUP.exe
    "C:\Users\Admin\AppData\Local\Temp\bitbot_v2.8_SETUP.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4564
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3180
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2620
    • C:\Users\Admin\AppData\Local\Temp\wdisplay.exe
      "C:\Users\Admin\AppData\Local\Temp\wdisplay.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:396
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v "Shell" /d "C:\Windows\explorer.exe, C:\Users\Admin\AppData\Local\Temp\wdisplay.exe" /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1428
        • C:\Windows\SysWOW64\reg.exe
          reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v "Shell" /d "C:\Windows\explorer.exe, C:\Users\Admin\AppData\Local\Temp\wdisplay.exe" /f
          4⤵
          • Modifies WinLogon for persistence
          • System Location Discovery: System Language Discovery
          PID:1440
      • C:\Users\Admin\AppData\Local\Temp\memtest.exe
        "C:\Users\Admin\AppData\Local\Temp\memtest.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4368
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
          "C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:4064
        • C:\Users\Admin\AppData\Local\Temp\wdisplay.exe
          "C:\Users\Admin\AppData\Local\Temp\wdisplay.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:4800

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\wdisplay.exe.log

    Filesize

    128B

    MD5

    a5dcc7c9c08af7dddd82be5b036a4416

    SHA1

    4f998ca1526d199e355ffb435bae111a2779b994

    SHA256

    e24033ceec97fd03402b03acaaabd1d1e378e83bb1683afbccac760e00f8ead5

    SHA512

    56035de734836c0c39f0b48641c51c26adb6e79c6c65e23ca96603f71c95b8673e2ef853146e87efc899dd1878d0bbc2c82d91fbf0fce81c552048e986f9bb5a

  • C:\Users\Admin\AppData\Local\Temp\memtest.exe

    Filesize

    394KB

    MD5

    83b9c0ccfc41bcf9900d13d3de74ba3b

    SHA1

    d2dddf0c6c5e6ce45f3ebf3d89826ed64fdab610

    SHA256

    32b7afcb5c386847d67df435dd1ee685d7afa39bc0fac4437f054c5546af25dd

    SHA512

    2181189443bda3126c4e2335d355454eee3c9576292fd9485dc75839c04cf64dc0f13c58db52f202f513d5ff342c688ca1b44f013db66d68423d22b0b5caa139

  • C:\Users\Admin\AppData\Local\Temp\wdisplay.exe

    Filesize

    9KB

    MD5

    08ab5643b6469e0563d02f25a5d45de6

    SHA1

    32556b524c38559de2bf31e08883ca20e20a2b66

    SHA256

    fc070a7f806d5ad7df330bb774d3a2708ed5576d6a113dad3f20a52e3400d7b7

    SHA512

    090cf8e8f9478e2dd9c9d86cec7d3be1c846903b652d2cccfb01114ce2a689403ccb2527f74fccd37fb4ef84a3ab0bf2ea84fdce1429c48e05020a8dc9a2595f

  • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

    Filesize

    57KB

    MD5

    454501a66ad6e85175a6757573d79f8b

    SHA1

    8ca96c61f26a640a5b1b1152d055260b9d43e308

    SHA256

    7fd4f35aff4a0d4bfaae3a5dfb14b94934276df0e96d1a417a8f3693915e72c8

    SHA512

    9dc3b9a9b7e661acc3ac9a0ff4fd764097fc41ccbc2e7969cae9805cc693a87e8255e459ea5f315271825e7e517a46649acc8d42122a8018264cc3f2efa34fb7

  • C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch

    Filesize

    420B

    MD5

    f13c44ab8e4a29fa4837d55d4b245ced

    SHA1

    a13279c616ad014e216b0b4136c6d8b5846fd21e

    SHA256

    08b2af116449dcba21ce69ccfc4759e29c51859655fe83d88ec720af01a4b727

    SHA512

    caf1ce7b1a0b6d277af25c87f2b9b2c2186e31ea49bdb15908beeeb8d5b3005d4acde4505198827fbb47ee08c9459c39de1c08541cb91ccc82b8f5a6a2ced17a

  • memory/396-38-0x0000000074EB0000-0x0000000075461000-memory.dmp

    Filesize

    5.7MB

  • memory/396-39-0x0000000074EB0000-0x0000000075461000-memory.dmp

    Filesize

    5.7MB

  • memory/396-45-0x0000000074EB0000-0x0000000075461000-memory.dmp

    Filesize

    5.7MB

  • memory/396-41-0x0000000074EB0000-0x0000000075461000-memory.dmp

    Filesize

    5.7MB

  • memory/396-37-0x0000000074EB2000-0x0000000074EB3000-memory.dmp

    Filesize

    4KB

  • memory/3180-10-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/3180-12-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/3180-9-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/3180-40-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/3180-14-0x0000000002410000-0x0000000002411000-memory.dmp

    Filesize

    4KB

  • memory/3180-11-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/3180-13-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4064-56-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4064-53-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4064-54-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4064-55-0x0000000000400000-0x00000000004B7000-memory.dmp

    Filesize

    732KB

  • memory/4564-2-0x0000000074EB0000-0x0000000075461000-memory.dmp

    Filesize

    5.7MB

  • memory/4564-3-0x0000000074EB2000-0x0000000074EB3000-memory.dmp

    Filesize

    4KB

  • memory/4564-51-0x0000000074EB0000-0x0000000075461000-memory.dmp

    Filesize

    5.7MB

  • memory/4564-4-0x0000000074EB0000-0x0000000075461000-memory.dmp

    Filesize

    5.7MB

  • memory/4564-1-0x0000000074EB0000-0x0000000075461000-memory.dmp

    Filesize

    5.7MB

  • memory/4564-0-0x0000000074EB2000-0x0000000074EB3000-memory.dmp

    Filesize

    4KB