Analysis

  • max time kernel
    120s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/03/2025, 07:30

General

  • Target

    JaffaCakes118_37969e3e1072e63d7b7cb3a4589da868.exe

  • Size

    1.0MB

  • MD5

    37969e3e1072e63d7b7cb3a4589da868

  • SHA1

    7322c4e785f823a88bac1a1905b6a9552a813ff6

  • SHA256

    bffdb13b50fb76a4e85e4e027e166271dbe2cc9ccaf19fbff4ba8cfeeb6ea297

  • SHA512

    9b20b52d83a740cea6f7757c71d8b6a218f4b179c44d32487fd7127d2e3701bcc67d211840c214e5986f609e18ba33d01a271f8f163a45e2108935d1d475046d

  • SSDEEP

    12288:YPUrHQD3AQlabjnJnIP5BfjdXmwmwGsqp/UAQQf9y0yaln2qnqGG41I9SOHlhCUC:YsTjTNebdhmMov1Cc0zdQL98hpyX

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

drkcmt.no-ip.org:1604

Mutex

DC_MUTEX-XRH4NSY

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    WY7jPoPv6hlA

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

rc4.plain

Signatures

  • Darkcomet

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

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Executes dropped EXE 1 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • 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.

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_37969e3e1072e63d7b7cb3a4589da868.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_37969e3e1072e63d7b7cb3a4589da868.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1452
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\04fdikmx\04fdikmx.cmdline"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1904
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES6EB8.tmp" "c:\Users\Admin\AppData\Local\Temp\04fdikmx\CSC815E8200991A41CEA99D9F1AB8EFF7EE.TMP"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2416
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
      2⤵
      • Modifies WinLogon for persistence
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4552
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1944
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
          4⤵
          • Sets file to hidden
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:4180
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4608
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
          4⤵
          • Sets file to hidden
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:4016
      • C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe
        "C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2696

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe

    Filesize

    1.1MB

    MD5

    d881de17aa8f2e2c08cbb7b265f928f9

    SHA1

    08936aebc87decf0af6e8eada191062b5e65ac2a

    SHA256

    b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

    SHA512

    5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

  • C:\Users\Admin\AppData\Local\Temp\04fdikmx\04fdikmx.dll

    Filesize

    5KB

    MD5

    a596f6e581c6dcde21fd4877bfc2487a

    SHA1

    499b359cc2c91e718ed0cab8b336a21c81699a74

    SHA256

    d254c1812dd93abaf928b59f3e462183f8640c9bb628b9f093b50c8c39f33594

    SHA512

    5d2112262d3ab7e52e138d8eda2ffb4336cbb45faef67ff81096402708668d0e7f5324df4d47d5abe84caf77146dbf260cabb69e3547e42d2143a0aab9331ef8

  • C:\Users\Admin\AppData\Local\Temp\RES6EB8.tmp

    Filesize

    1KB

    MD5

    23dca0039787962e6b56c3f4faa7c6a6

    SHA1

    f3c66040f28ce16456427ee9749def89f6bd91c1

    SHA256

    0d89705db1207728b06cbc48d7daeb54bdba3db3484a49a7d0c27b7f1c0afdd4

    SHA512

    384f5609659baeb5daf7c917c34099ed7b752b59390ecc52dc304b738ca3a62d5719e8b984be1b6c3474edf0f98f87cf14c20697d25fa009a82ae457ca697b23

  • \??\c:\Users\Admin\AppData\Local\Temp\04fdikmx\04fdikmx.0.cs

    Filesize

    4KB

    MD5

    f60a1218bfdab4f9b0176d4e1a15ec68

    SHA1

    2222a76846b6caf120589f7120a5a41f8811761d

    SHA256

    fa9031f18b423c4d078667222b009f1d285149b93d60029feab549fc6d46a927

    SHA512

    c082a09f8e8b20776d5d1397b6a781c293df15a421c1f93e069df8df8fe59580100c7347deef3185c8104ecce2eae6fabfc44994805d21a23123a6a9cd763bc6

  • \??\c:\Users\Admin\AppData\Local\Temp\04fdikmx\04fdikmx.cmdline

    Filesize

    224B

    MD5

    970797d6fe506b798585f556d5f8b974

    SHA1

    ff17371ae2915ed118a4f881c02317625c7af08c

    SHA256

    71fc03136bb2d0142863b0d53b1065d2c460e0f384f7b628124202857c24dfc5

    SHA512

    360576ae861a9d337c065e1ae22ae86df79e166a84709b73a89058d332d7faa022c2e2f0f300064b50976c43bfc182532411284d98426c300577a4efcf749d70

  • \??\c:\Users\Admin\AppData\Local\Temp\04fdikmx\CSC815E8200991A41CEA99D9F1AB8EFF7EE.TMP

    Filesize

    652B

    MD5

    3c8a5dfaaf48e41086594de9f97e29c6

    SHA1

    a6814592b5a64d8752e0bd371bcb408b057f3ddb

    SHA256

    1a756e8274706986a39749ad42cb36a95d6ef91b1824d238d825da9ac2ff02f6

    SHA512

    a02f6ab135fcce155b90a156c4bcb1c37bb3b3495e9533b82463c1d62ac1234f3a5b75275fac3c3b7fbd2e25f57034e73d89da0786a66b825cce9ecabb887fa7

  • memory/1452-22-0x0000000074730000-0x0000000074EE0000-memory.dmp

    Filesize

    7.7MB

  • memory/1452-6-0x0000000074730000-0x0000000074EE0000-memory.dmp

    Filesize

    7.7MB

  • memory/1452-2-0x0000000004D30000-0x0000000004DCC000-memory.dmp

    Filesize

    624KB

  • memory/1452-16-0x0000000002630000-0x0000000002638000-memory.dmp

    Filesize

    32KB

  • memory/1452-1-0x0000000000260000-0x0000000000372000-memory.dmp

    Filesize

    1.1MB

  • memory/1452-0-0x000000007473E000-0x000000007473F000-memory.dmp

    Filesize

    4KB

  • memory/4552-19-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/4552-21-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/4552-23-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/4552-24-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/4552-18-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/4552-86-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB