Overview

overview

10

Static

static

10

21fb8f4042...22.exe

windows7-x64

10

21fb8f4042...22.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    163s
  • max time network
    181s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-12-2023 00:38

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General

  • Target

    21fb8f40424a8f2356dc51ce43d1af22.exe

  • Size

    347KB

  • MD5

    21fb8f40424a8f2356dc51ce43d1af22

  • SHA1

    940c797a0201f182e451ac5e28df4526a0fb6d39

  • SHA256

    3d3c0207409076d6c9f7800a4557000aabeec2a6f81462b59f5fc76f1b215839

  • SHA512

    9d1126b6487788848cc2b79211bf730d7c655794fd7d33e060aaf067e9bda04d8d9ad9ec1d55070497f618e25f2c61b918998159ccaacbdaf5f2eaa609803b39

  • SSDEEP

    6144:8wT5O7pJmNB6dLY6dCnnsyZLHoaIyv6ocU/qxDS2xDWb3cCkdRPlbL:8P+NULZdCn3TbncU2D7Ab3

Score
10/10
darkcometdownpersistencerattrojanupx

Malware Config

Extracted

Family

darkcomet

Botnet

down

C2

epicrypt.no-ip.org:1604

Mutex

DC_MUTEX-V6F2W9Y

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    SLDYxgws5n00

  • install

    true

  • offline_keylogger

    true

  • persistence

    false

  • reg_key

    MicroUpdate

Signatures

  • Darkcomet

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

    trojanratdarkcomet
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • UPX packed file 6 IoCs

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

    upx
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops file in System32 directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\21fb8f40424a8f2356dc51ce43d1af22.exe
    "C:\Users\Admin\AppData\Local\Temp\21fb8f40424a8f2356dc51ce43d1af22.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in System32 directory
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    PID:1652

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

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

Resource Development

Reconnaissance

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
    Filesize

    347KB

    MD5

    21fb8f40424a8f2356dc51ce43d1af22

    SHA1

    940c797a0201f182e451ac5e28df4526a0fb6d39

    SHA256

    3d3c0207409076d6c9f7800a4557000aabeec2a6f81462b59f5fc76f1b215839

    SHA512

    9d1126b6487788848cc2b79211bf730d7c655794fd7d33e060aaf067e9bda04d8d9ad9ec1d55070497f618e25f2c61b918998159ccaacbdaf5f2eaa609803b39

    Download Submit
  • memory/1652-0-0x0000000000400000-0x00000000004E7000-memory.dmp
    Filesize

    924KB

    Download
  • memory/1652-1-0x0000000000400000-0x00000000004E7000-memory.dmp
    Filesize

    924KB

    Download
  • memory/1652-3-0x00000000022F0000-0x00000000022F1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/1652-4-0x0000000000400000-0x00000000004E7000-memory.dmp
    Filesize

    924KB

    Download
  • memory/1652-7-0x0000000000400000-0x00000000004E7000-memory.dmp
    Filesize

    924KB

    Download
  • memory/1652-8-0x00000000022F0000-0x00000000022F1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/1652-11-0x0000000000400000-0x00000000004E7000-memory.dmp
    Filesize

    924KB

    Download