Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240730-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-08-2024 22:43

General

  • Target

    820527243750a28e1729bcc01aad699f_JaffaCakes118.exe

  • Size

    363KB

  • MD5

    820527243750a28e1729bcc01aad699f

  • SHA1

    125df4c2841b1335669bb07e2c697994db065683

  • SHA256

    b7115feb8e9603503cb99ef451123ed8ca0209358df0fedd1493472777268e64

  • SHA512

    7c8741a9c2f512745baea3948fbeb451f1c400217879403f451cf3818ce0b67edd63b5302a1d98a373c50a29eee4fe034b6b8dd37fec6b0da7d5cf63e7156700

  • SSDEEP

    6144:ucNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37ydwS:ucW7KEZlPzCy37yl

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

tihe17.zapto.org:8030

Mutex

DC_MUTEX-X1RN242

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    umehiZR0cf0n

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies firewall policy service 3 TTPs 6 IoCs
  • Modifies security service 2 TTPs 2 IoCs
  • Windows security bypass 2 TTPs 4 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables Task Manager via registry modification
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 4 IoCs
  • UPX packed file 6 IoCs

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

  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Maps connected drives based on registry 3 TTPs 6 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 15 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\820527243750a28e1729bcc01aad699f_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\820527243750a28e1729bcc01aad699f_JaffaCakes118.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4220
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\820527243750a28e1729bcc01aad699f_JaffaCakes118.exe" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:232
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\820527243750a28e1729bcc01aad699f_JaffaCakes118.exe" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2308
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2888
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:4512
    • C:\Users\Admin\AppData\Local\Temp\1.EXE
      "C:\Users\Admin\AppData\Local\Temp\1.EXE"
      2⤵
      • Executes dropped EXE
      • Maps connected drives based on registry
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2784
      • C:\Windows\SysWOW64\svchost.exe
        C:\Windows\syswow64\svchost.exe
        3⤵
        • Adds policy Run key to start application
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        PID:1636
    • C:\Windows\SysWOW64\notepad.exe
      notepad
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:220
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
      2⤵
      • Modifies firewall policy service
      • Modifies security service
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Checks computer location settings
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:2708
      • C:\Users\Admin\AppData\Local\Temp\1.EXE
        "C:\Users\Admin\AppData\Local\Temp\1.EXE"
        3⤵
        • Executes dropped EXE
        • Maps connected drives based on registry
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:4740
        • C:\Windows\SysWOW64\svchost.exe
          C:\Windows\syswow64\svchost.exe
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2404
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Modifies firewall policy service
        • Modifies security service
        • Windows security bypass
        • Disables RegEdit via registry modification
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2500
        • C:\Users\Admin\AppData\Local\Temp\1.EXE
          "C:\Users\Admin\AppData\Local\Temp\1.EXE"
          4⤵
          • Executes dropped EXE
          • Maps connected drives based on registry
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:3420
          • C:\Windows\SysWOW64\svchost.exe
            C:\Windows\syswow64\svchost.exe
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2920
        • C:\Windows\SysWOW64\notepad.exe
          notepad
          4⤵
          • System Location Discovery: System Language Discovery
          PID:512

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\1.EXE

    Filesize

    13KB

    MD5

    95ff7bbd32e9002d393e056828187814

    SHA1

    68a9b42cc5a5fd10f3cd53baaacbb80646b0c057

    SHA256

    40999d697b90d2ef63889c53e00cc1be3f94d2a0581198ad6199ed2a29a14e94

    SHA512

    8bc2f53dab5afa0eeb577fa9521bea42ccf7b176a2733dd312779774b31bc9e65b4fac7942386e0af76fa5a7dcde5e5d401abc7befb16ffb8091befaf9cf2d77

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

    Filesize

    363KB

    MD5

    820527243750a28e1729bcc01aad699f

    SHA1

    125df4c2841b1335669bb07e2c697994db065683

    SHA256

    b7115feb8e9603503cb99ef451123ed8ca0209358df0fedd1493472777268e64

    SHA512

    7c8741a9c2f512745baea3948fbeb451f1c400217879403f451cf3818ce0b67edd63b5302a1d98a373c50a29eee4fe034b6b8dd37fec6b0da7d5cf63e7156700

  • memory/220-17-0x0000000000FE0000-0x0000000000FE1000-memory.dmp

    Filesize

    4KB

  • memory/512-101-0x0000000000D30000-0x0000000000D31000-memory.dmp

    Filesize

    4KB

  • memory/1636-108-0x00000000003E0000-0x00000000003E5000-memory.dmp

    Filesize

    20KB

  • memory/1636-104-0x00000000003E0000-0x00000000003E5000-memory.dmp

    Filesize

    20KB

  • memory/1636-16-0x00000000007E0000-0x00000000007EE000-memory.dmp

    Filesize

    56KB

  • memory/1636-14-0x00000000007E0000-0x00000000007EE000-memory.dmp

    Filesize

    56KB

  • memory/2404-84-0x00000000007E0000-0x00000000007EE000-memory.dmp

    Filesize

    56KB

  • memory/2404-85-0x00000000007E0000-0x00000000007EE000-memory.dmp

    Filesize

    56KB

  • memory/2500-86-0x0000000000400000-0x00000000004ED000-memory.dmp

    Filesize

    948KB

  • memory/2708-76-0x0000000000400000-0x00000000004ED000-memory.dmp

    Filesize

    948KB

  • memory/2708-88-0x0000000000400000-0x00000000004ED000-memory.dmp

    Filesize

    948KB

  • memory/2784-13-0x0000000000410000-0x0000000000412000-memory.dmp

    Filesize

    8KB

  • memory/2784-12-0x0000000000400000-0x0000000000405000-memory.dmp

    Filesize

    20KB

  • memory/2920-97-0x00000000007E0000-0x00000000007EE000-memory.dmp

    Filesize

    56KB

  • memory/2920-98-0x00000000007E0000-0x00000000007EE000-memory.dmp

    Filesize

    56KB

  • memory/4220-0-0x0000000000400000-0x00000000004ED000-memory.dmp

    Filesize

    948KB

  • memory/4220-99-0x0000000000400000-0x00000000004ED000-memory.dmp

    Filesize

    948KB

  • memory/4220-1-0x0000000000B00000-0x0000000000B01000-memory.dmp

    Filesize

    4KB