Overview

overview

10

Static

static

a5642d230f...80.exe

windows7-x64

10

a5642d230f...80.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    a5642d230f3cfd4a2a7cf766967e67947a6d854b9d5e8bdb5ce129971bce3f80

  • Size

    718KB

  • Sample

    220919-1nnb6safg9

  • MD5

    81139fa7f308ef2f3c0ceb1cbaa82ee8

  • SHA1

    1f7d7a73d6f6859c2015548c9a6b0e9920ad6b13

  • SHA256

    a5642d230f3cfd4a2a7cf766967e67947a6d854b9d5e8bdb5ce129971bce3f80

  • SHA512

    0bf8cf839df47c08f581730e3995887f5cd3fdbdb117e359fbb9f303c308e20b6e81f95003b13c143c2f3b7c4f4cfc1ec665dacd1d7dbc0a4363e45abb8177b4

  • SSDEEP

    12288:nllDHGC0laNnjAsfwq132Q+Qga/gZbYfsYP3cpGbXE3MMyNb7n/XWdL80sfcD:n/DGC0URjAsB32Qvga/gZbusYzbhMyNo

Score
10/10
darkcometguest16persistencerattrojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

127.0.0.1:1604

Mutex

DC_MUTEX-FFA5BUQ

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    r1KV3P9crCSj

  • install

    true

  • offline_keylogger

    true

  • password

    12345

  • persistence

    true

  • reg_key

    MicroUpdate

Targets

    • Target

      a5642d230f3cfd4a2a7cf766967e67947a6d854b9d5e8bdb5ce129971bce3f80

    • Size

      718KB

    • MD5

      81139fa7f308ef2f3c0ceb1cbaa82ee8

    • SHA1

      1f7d7a73d6f6859c2015548c9a6b0e9920ad6b13

    • SHA256

      a5642d230f3cfd4a2a7cf766967e67947a6d854b9d5e8bdb5ce129971bce3f80

    • SHA512

      0bf8cf839df47c08f581730e3995887f5cd3fdbdb117e359fbb9f303c308e20b6e81f95003b13c143c2f3b7c4f4cfc1ec665dacd1d7dbc0a4363e45abb8177b4

    • SSDEEP

      12288:nllDHGC0laNnjAsfwq132Q+Qga/gZbYfsYP3cpGbXE3MMyNb7n/XWdL80sfcD:n/DGC0URjAsB32Qvga/gZbusYzbhMyNo

    Score
    10/10
    darkcometguest16persistencerattrojan

    • Darkcomet

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

      trojanratdarkcomet

    • Modifies WinLogon for persistence

      persistence

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1
T1004

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks