Overview

overview

10

Static

static

10

5a1c8ef15c...b1.exe

windows7_x64

10

5a1c8ef15c...b1.exe

windows10_x64

10

Sharing

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General

  • Target

    5a1c8ef15cccd50082c6862f1df8fccc40cfa7b94e7710caaf60751c714c6cb1

  • Size

    659KB

  • Sample

    210921-k5vvksbfdr

  • MD5

    1d9b720db2f4e23c3502f1456f09b927

  • SHA1

    a68034b6084112066cc02565dd519a23757c1b15

  • SHA256

    5a1c8ef15cccd50082c6862f1df8fccc40cfa7b94e7710caaf60751c714c6cb1

  • SHA512

    39cf1a7b5d12dfb19439676e9d692cc4536cd04c22872ef67370759e34dfba805e52c38ee0a58420b265aa29d8c91c563936e9be90fd578fe2418cb3c389c3d1

Score
10/10
darkcometsazanevasionpersistencerattrojan

Malware Config

Extracted

Family

darkcomet

Botnet

Sazan

C2

8.tcp.ngrok.io:13738

Mutex

DC_MUTEX-RYGMJ3G

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    1rG7r70RosbW

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

Targets

    • Target

      5a1c8ef15cccd50082c6862f1df8fccc40cfa7b94e7710caaf60751c714c6cb1

    • Size

      659KB

    • MD5

      1d9b720db2f4e23c3502f1456f09b927

    • SHA1

      a68034b6084112066cc02565dd519a23757c1b15

    • SHA256

      5a1c8ef15cccd50082c6862f1df8fccc40cfa7b94e7710caaf60751c714c6cb1

    • SHA512

      39cf1a7b5d12dfb19439676e9d692cc4536cd04c22872ef67370759e34dfba805e52c38ee0a58420b265aa29d8c91c563936e9be90fd578fe2418cb3c389c3d1

    Score
    10/10
    darkcometsazanevasionpersistencerattrojan

    • Darkcomet

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

      trojanratdarkcomet

    • Modifies WinLogon for persistence

      persistence

    • Modifies firewall policy service

      evasion

    • Modifies security service

      evasion

    • Windows security bypass

      evasiontrojan

    • Disables RegEdit via registry modification

      evasion

    • Disables Task Manager via registry modification

      evasion

    • Executes dropped EXE

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

      evasion

    • Checks computer location settings

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

    • Loads dropped DLL

    • Windows security modification

      evasiontrojan

    • Adds Run key to start application

      persistence
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

2
T1031

Hidden Files and Directories

2
T1158

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

7
T1112

Disabling Security Tools

2
T1089

Hidden Files and Directories

2
T1158

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks