Malware Analysis Report

2024-08-06 17:11

Sample ID 240503-xk2tlsdc6v
Target FivemFreeUpdated.exe
SHA256 32c5cdbbd37c34c5d38ceed5bbf657f74b2629596e8b8635e8e888bb51117a0e
Tags
darkcomet guest16 evasion persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

32c5cdbbd37c34c5d38ceed5bbf657f74b2629596e8b8635e8e888bb51117a0e

Threat Level: Known bad

The file FivemFreeUpdated.exe was found to be: Known bad.

Malicious Activity Summary

darkcomet guest16 evasion persistence rat trojan

Modifies WinLogon for persistence

Darkcomet

Darkcomet family

Disables Task Manager via registry modification

Executes dropped EXE

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Modifies registry class

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Winlogon Helper DLL
T1547.004
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Winlogon Helper DLL
T1547.004
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-05-03 18:55

Signatures

Darkcomet family

darkcomet

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-03 18:55

Reported

2024-05-03 19:29

Platform

win11-20240426-en

Max time kernel

599s

Max time network

459s

Command Line

"C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe"

Signatures

Darkcomet

trojan rat darkcomet

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A

Disables Task Manager via registry modification

evasion

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2994005945-4089876968-1367784197-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeSystemtimePrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeChangeNotifyPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeUndockPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeCreateGlobalPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: 33 N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: 34 N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: 35 N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: 36 N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeSecurityPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeSystemtimePrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeBackupPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeChangeNotifyPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeUndockPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeManageVolumePrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeImpersonatePrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: SeCreateGlobalPrivilege N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: 33 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: 34 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: 35 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A
Token: 36 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3704 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
PID 3704 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
PID 3704 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
PID 3696 wrote to memory of 776 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3696 wrote to memory of 776 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3696 wrote to memory of 776 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 3696 wrote to memory of 1300 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe C:\Windows\explorer.exe
PID 3696 wrote to memory of 1300 N/A C:\Users\Admin\Documents\MSDCSC\msdcsc.exe C:\Windows\explorer.exe

Processes

C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe

"C:\Users\Admin\AppData\Local\Temp\FivemFreeUpdated.exe"

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"

C:\Program Files (x86)\Internet Explorer\iexplore.exe

"C:\Program Files (x86)\Internet Explorer\iexplore.exe"

C:\Windows\explorer.exe

"C:\Windows\explorer.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 fivemexternal.ddns.net udp
N/A 192.168.1.116:5529 fivemexternal.ddns.net tcp

Files

memory/3704-0-0x0000000002490000-0x0000000002491000-memory.dmp

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

MD5 507d6f31d2798d62caf36db241b42421
SHA1 f0ac3a0f5c1edc91cf78d713400a0d3a0aba5844
SHA256 32c5cdbbd37c34c5d38ceed5bbf657f74b2629596e8b8635e8e888bb51117a0e
SHA512 ae39793b5312fffea3a68684bffb3800a6dd7cb2327e9da0470cfb05fa4e1a7457ec394da9c7ccea2ec44a01a05fddacc14f4430ba0d63e9766d32d4e2c8d270

memory/3696-62-0x0000000002240000-0x0000000002241000-memory.dmp

memory/3704-63-0x0000000000400000-0x00000000004CA000-memory.dmp

memory/3696-64-0x0000000000400000-0x00000000004CA000-memory.dmp

memory/3696-66-0x0000000000400000-0x00000000004CA000-memory.dmp