Overview

overview

10

Static

static

10

05fbb61b66...18.exe

windows7-x64

10

05fbb61b66...18.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    141s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-06-2024 12:27

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General

  • Target

    05fbb61b6662a83eb006bfdd817c3085_JaffaCakes118.exe

  • Size

    346KB

  • MD5

    05fbb61b6662a83eb006bfdd817c3085

  • SHA1

    1c620e9b3955e8cd6cafc9491247422f6fcd4228

  • SHA256

    084dcef84066066526d6a716de8a708e94ba9a74be5afb3457cf873d0fab1260

  • SHA512

    8757b1a04e9029782cd096ef8b644e6612fe7d97cc2d17823e027cbf7cc940bf9a381734750033ec549a17ec9a74943b84a37203484148f7ec54759a1cfd6a87

  • SSDEEP

    6144:7FRaI2EqBP/WsZL1PgLl4w0AidVym0EnarUBYVsfMd0m1O59B:hR72EqluswR45JTnaEY2fMFqn

Score
10/10
darkcometevasionpersistencerattrojanupx

Malware Config

Signatures

  • Darkcomet

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

    trojanratdarkcomet
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Modifies firewall policy service 3 TTPs 6 IoCs
    evasion
  • Modifies security service 2 TTPs 2 IoCs
    evasion
  • Windows security bypass 2 TTPs 4 IoCs
    evasiontrojan
  • Disables RegEdit via registry modification 2 IoCs
    evasion
  • Disables Task Manager via registry modification
    evasion
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 6 IoCs

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

    upx
  • Windows security modification 2 TTPs 2 IoCs
    evasiontrojan
  • Adds Run key to start application 2 TTPs 3 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\05fbb61b6662a83eb006bfdd817c3085_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\05fbb61b6662a83eb006bfdd817c3085_JaffaCakes118.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4588
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\05fbb61b6662a83eb006bfdd817c3085_JaffaCakes118.exe" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4204
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp\05fbb61b6662a83eb006bfdd817c3085_JaffaCakes118.exe" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:4700
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3448
      • C:\Windows\SysWOW64\attrib.exe
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        3⤵
        • Sets file to hidden
        • Views/modifies file attributes
        PID:2572
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 4 && del "C:\Users\Admin\AppData\Local\Temp\05fbb61b6662a83eb006bfdd817c3085_JaffaCakes118.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3904
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 4
        3⤵
        • Runs ping.exe
        PID:2396
    • C:\Users\Admin\Documents\MSDCSC\msnetsrv.exe
      "C:\Users\Admin\Documents\MSDCSC\msnetsrv.exe"
      2⤵
      • Modifies firewall policy service
      • Modifies security service
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1964
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
        • Modifies firewall policy service
        • Modifies security service
        • Windows security bypass
        • Disables RegEdit via registry modification
        • Adds Run key to start application
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:376

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

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Defense Evasion

Modify Registry

6
T1112

Impair Defenses

3
T1562

Disable or Modify Tools

2
T1562.001

Disable or Modify System Firewall

1
T1562.004

Hide Artifacts

2
T1564

Hidden Files and Directories

2
T1564.001

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

  • C:\Users\Admin\Documents\MSDCSC\msnetsrv.exe
    Filesize

    346KB

    MD5

    05fbb61b6662a83eb006bfdd817c3085

    SHA1

    1c620e9b3955e8cd6cafc9491247422f6fcd4228

    SHA256

    084dcef84066066526d6a716de8a708e94ba9a74be5afb3457cf873d0fab1260

    SHA512

    8757b1a04e9029782cd096ef8b644e6612fe7d97cc2d17823e027cbf7cc940bf9a381734750033ec549a17ec9a74943b84a37203484148f7ec54759a1cfd6a87

    Download Submit
  • memory/376-66-0x0000000000400000-0x00000000004E5000-memory.dmp
    Filesize

    916KB

    Download
  • memory/1964-65-0x0000000000400000-0x00000000004E5000-memory.dmp
    Filesize

    916KB

    Download
  • memory/1964-67-0x0000000000400000-0x00000000004E5000-memory.dmp
    Filesize

    916KB

    Download
  • memory/4588-0-0x0000000000400000-0x00000000004E5000-memory.dmp
    Filesize

    916KB

    Download
  • memory/4588-1-0x0000000000B00000-0x0000000000B01000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4588-64-0x0000000000400000-0x00000000004E5000-memory.dmp
    Filesize

    916KB

    Download