Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    15-11-2020 22:42

General

  • Target

    273fc22bc707da117959cd5088c60c3052962fe183a51a2b8a6c66820723cbfd.exe

  • Size

    1.8MB

  • MD5

    9dac373d8e40e65460db0238cb110473

  • SHA1

    240d9a67dbb28122beb4569a3fe04788459d5628

  • SHA256

    273fc22bc707da117959cd5088c60c3052962fe183a51a2b8a6c66820723cbfd

  • SHA512

    47f593b674ef732eabe676f569c51764ea73f60778cb033bd0cf92830e44d51bb6e08f319c9de04ad65abb39d807bc3fda5d93313db6424c9393ce64dd9f4a96

Malware Config

Extracted

Family

darkcomet

Botnet

vbsted

C2

forshared.ddns.net:6722

Mutex

DC_MUTEX-6UPV0L8

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    kWdnrSvNCdV5

  • 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
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 7 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\273fc22bc707da117959cd5088c60c3052962fe183a51a2b8a6c66820723cbfd.exe
    "C:\Users\Admin\AppData\Local\Temp\273fc22bc707da117959cd5088c60c3052962fe183a51a2b8a6c66820723cbfd.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1644
    • C:\33725277\kngmpwequb.pif
      "C:\33725277\kngmpwequb.pif" xpomrfvel.rqn
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1188
      • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
        "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
        3⤵
        • Modifies WinLogon for persistence
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1664
        • C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe
          "C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe"
          4⤵
          • Executes dropped EXE
          PID:1780
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\33725277\run.vbs"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:964
        • C:\33725277\kngmpwequb.pif
          "C:\33725277\kngmpwequb.pif" xpomrfvel.rqn
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1508
          • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
            "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:1924

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

Discovery

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\33725277\arggi.xls
    MD5

    823007f5c65d9fe990fc54bf62115e57

    SHA1

    4f82f8ecbd22962e5cc3fc0db945f624152395e7

    SHA256

    3c7a08daedb21220704ed349c7653a3e49b832b1f5680511e34c13842ded7674

    SHA512

    1fbe5f6b3d7cc883b1a32d9ddabe30971b3c5e3da246fbef9f34c08da3121cb60a8298be22e60c083c1afc392f259f34d0c5718b22b5ccc168af5473344a53d7

  • C:\33725277\kngmpwequb.pif
    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

  • C:\33725277\kngmpwequb.pif
    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

  • C:\33725277\kngmpwequb.pif
    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

  • C:\33725277\run.vbs
    MD5

    bd16d4520614b3c9d71e2e0c83ca5d13

    SHA1

    6e402d7033b0a07c4bcbd1f5a99603b2e9a6e5a9

    SHA256

    a9cf9d1cb3b01df857a63916ca3f930c496be6508f8f5fc1f831c98e65c181f5

    SHA512

    431a0c9f162f4527ffefe3bc41eb872710229b03abf0f3e17840dc6c3e5e4336872af4aec23105b7b3686e5c451b022eb4144998a4f16f7be90409f4b1606b4e

  • C:\33725277\xpomrfvel.rqn
    MD5

    39b173c9805bd7eafa796540be0bc0c3

    SHA1

    c78582ee6526e8c962322a4d66b0f816ed2bdc36

    SHA256

    4b8662365d2085b4aa04273e740ffa1357e3cbac5590cc4b846a174b0e2d6e71

    SHA512

    5eae3743a7b80868d0f64abe51ad4c56ce39a2e10fb0333f23ff4248328270eda9d74463dec3c07cad9cb5a1ebff97090f355663966b1ac9217b6407c97415f7

  • C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • C:\ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • \33725277\kngmpwequb.pif
    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

  • \33725277\kngmpwequb.pif
    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

  • \33725277\kngmpwequb.pif
    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

  • \33725277\kngmpwequb.pif
    MD5

    43e7db53ce5c130179aef5b47dcf7608

    SHA1

    5398e207d9ad301860b570d87601c1664ada9c0a

    SHA256

    9c04aab5734e2e0eea44af2584333ecc093b27ef36a586fb8873b5d4cadcd7f1

    SHA512

    a79f8094152f4f0cb5f0763bc4cdfdc9061af322dfee1bac043de0ac7581f2a7b35841924fe224ecc73b6bda1fba6811045e513d45e8f3598ca6ec313b7103f4

  • \ProgramData\Microsoft\Windows\Start Menu\MSDCSC\msdcsc.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • \Users\Admin\AppData\Local\Temp\RegSvcs.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • \Users\Admin\AppData\Local\Temp\RegSvcs.exe
    MD5

    0e06054beb13192588e745ee63a84173

    SHA1

    30b7d4d1277bafd04a83779fd566a1f834a8d113

    SHA256

    c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

    SHA512

    251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

  • memory/964-23-0x0000000000000000-mapping.dmp
  • memory/964-28-0x0000000002700000-0x0000000002704000-memory.dmp
    Filesize

    16KB

  • memory/1188-6-0x0000000000000000-mapping.dmp
  • memory/1508-30-0x0000000003D50000-0x0000000003DF5000-memory.dmp
    Filesize

    660KB

  • memory/1508-26-0x0000000000000000-mapping.dmp
  • memory/1644-0-0x00000000024B0000-0x00000000025B1000-memory.dmp
    Filesize

    1.0MB

  • memory/1664-14-0x00000000002D0000-0x0000000000921000-memory.dmp
    Filesize

    6.3MB

  • memory/1664-12-0x000000000035F888-mapping.dmp
  • memory/1664-11-0x00000000002D0000-0x0000000000921000-memory.dmp
    Filesize

    6.3MB

  • memory/1780-20-0x00000000742C0000-0x00000000749AE000-memory.dmp
    Filesize

    6.9MB

  • memory/1780-22-0x0000000000260000-0x0000000000261000-memory.dmp
    Filesize

    4KB

  • memory/1780-17-0x0000000000000000-mapping.dmp
  • memory/1780-21-0x0000000000EF0000-0x0000000000EF1000-memory.dmp
    Filesize

    4KB

  • memory/1924-33-0x00000000002D0000-0x00000000007C0000-memory.dmp
    Filesize

    4.9MB

  • memory/1924-34-0x000000000035F888-mapping.dmp
  • memory/1924-36-0x00000000002D0000-0x00000000007C0000-memory.dmp
    Filesize

    4.9MB