darkcomet | 8c30104c9da821a254c49dd59dce24af2de9e4b4e4bb86c30399f05d43fd77a3

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17-04-2024 12:56

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General

Target

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Size

658KB
MD5

25b08da1a964836d5b6d64ee0bcf30e0
SHA1

ad90af854d09a464b2ae958a93aa1cb713af1fb5
SHA256

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134
SHA512

45a5f0aac1d12fe33c5bceaa2a6b226d5fbb85c99c035c608686bc6143ef4c0abc15d197dc947fae4e441d234e43cf32396894e71f2f62f369f806dbf4a9f4bc
SSDEEP

12288:+9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hj:KZ1xuVVjfFoynPaVBUR8f+kN10EBp

Score

10^/10

darkcomet hecker evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Hecker

7.tcp.eu.ngrok.io:11791

Mutex

DC_MUTEX-GAFJ7KC

Attributes

InstallPath
Runtime Broker.exe
gencode
1NDoWjfTb2iN
install
true
offline_keylogger
true
persistence
true
reg_key
RUNTIMEBROKHANDLER

Signatures

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

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\Runtime Broker.exe"	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exeattrib.exe

pid	Process
2448	attrib.exe
4236	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

Executes dropped EXE 1 IoCs

Processes:

Runtime Broker.exe

pid	Process
4504	Runtime Broker.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exeRuntime Broker.exeiexplore.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RUNTIMEBROKHANDLER = "C:\\Windows\\system32\\Runtime Broker.exe"	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RUNTIMEBROKHANDLER = "C:\\Windows\\system32\\Runtime Broker.exe"	Runtime Broker.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RUNTIMEBROKHANDLER = "C:\\Windows\\system32\\Runtime Broker.exe"	iexplore.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

Processes:

flow	ioc
10	7.tcp.eu.ngrok.io
56	7.tcp.eu.ngrok.io
87	7.tcp.eu.ngrok.io

Drops file in System32 directory 3 IoCs

Processes:

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

description	ioc	Process
File created	C:\Windows\SysWOW64\Runtime Broker.exe	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
File opened for modification	C:\Windows\SysWOW64\Runtime Broker.exe	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
File opened for modification	C:\Windows\SysWOW64\	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Runtime Broker.exe

description	pid	Process	procid_target
PID 4504 set thread context of 2096	4504	Runtime Broker.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

iexplore.exe

pid	Process
2096	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exeRuntime Broker.exeiexplore.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSecurityPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeTakeOwnershipPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeLoadDriverPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemProfilePrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemtimePrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeProfSingleProcessPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeIncBasePriorityPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeCreatePagefilePrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeBackupPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeRestorePrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeShutdownPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeDebugPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemEnvironmentPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeChangeNotifyPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeRemoteShutdownPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeUndockPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeManageVolumePrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeImpersonatePrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeCreateGlobalPrivilege	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 33	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 34	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 35	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 36	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeIncreaseQuotaPrivilege	4504	Runtime Broker.exe
Token: SeSecurityPrivilege	4504	Runtime Broker.exe
Token: SeTakeOwnershipPrivilege	4504	Runtime Broker.exe
Token: SeLoadDriverPrivilege	4504	Runtime Broker.exe
Token: SeSystemProfilePrivilege	4504	Runtime Broker.exe
Token: SeSystemtimePrivilege	4504	Runtime Broker.exe
Token: SeProfSingleProcessPrivilege	4504	Runtime Broker.exe
Token: SeIncBasePriorityPrivilege	4504	Runtime Broker.exe
Token: SeCreatePagefilePrivilege	4504	Runtime Broker.exe
Token: SeBackupPrivilege	4504	Runtime Broker.exe
Token: SeRestorePrivilege	4504	Runtime Broker.exe
Token: SeShutdownPrivilege	4504	Runtime Broker.exe
Token: SeDebugPrivilege	4504	Runtime Broker.exe
Token: SeSystemEnvironmentPrivilege	4504	Runtime Broker.exe
Token: SeChangeNotifyPrivilege	4504	Runtime Broker.exe
Token: SeRemoteShutdownPrivilege	4504	Runtime Broker.exe
Token: SeUndockPrivilege	4504	Runtime Broker.exe
Token: SeManageVolumePrivilege	4504	Runtime Broker.exe
Token: SeImpersonatePrivilege	4504	Runtime Broker.exe
Token: SeCreateGlobalPrivilege	4504	Runtime Broker.exe
Token: 33	4504	Runtime Broker.exe
Token: 34	4504	Runtime Broker.exe
Token: 35	4504	Runtime Broker.exe
Token: 36	4504	Runtime Broker.exe
Token: SeIncreaseQuotaPrivilege	2096	iexplore.exe
Token: SeSecurityPrivilege	2096	iexplore.exe
Token: SeTakeOwnershipPrivilege	2096	iexplore.exe
Token: SeLoadDriverPrivilege	2096	iexplore.exe
Token: SeSystemProfilePrivilege	2096	iexplore.exe
Token: SeSystemtimePrivilege	2096	iexplore.exe
Token: SeProfSingleProcessPrivilege	2096	iexplore.exe
Token: SeIncBasePriorityPrivilege	2096	iexplore.exe
Token: SeCreatePagefilePrivilege	2096	iexplore.exe
Token: SeBackupPrivilege	2096	iexplore.exe
Token: SeRestorePrivilege	2096	iexplore.exe
Token: SeShutdownPrivilege	2096	iexplore.exe
Token: SeDebugPrivilege	2096	iexplore.exe
Token: SeSystemEnvironmentPrivilege	2096	iexplore.exe
Token: SeChangeNotifyPrivilege	2096	iexplore.exe
Token: SeRemoteShutdownPrivilege	2096	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid	Process
2096	iexplore.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.execmd.execmd.exeRuntime Broker.exeiexplore.exe

description	pid	Process	procid_target
PID 4180 wrote to memory of 1920	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	83
PID 4180 wrote to memory of 1920	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	83
PID 4180 wrote to memory of 1920	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	83
PID 4180 wrote to memory of 4652	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	86
PID 4180 wrote to memory of 4652	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	86
PID 4180 wrote to memory of 4652	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	86
PID 4180 wrote to memory of 4504	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	88
PID 4180 wrote to memory of 4504	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	88
PID 4180 wrote to memory of 4504	4180	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	88
PID 1920 wrote to memory of 2448	1920	cmd.exe	89
PID 1920 wrote to memory of 2448	1920	cmd.exe	89
PID 1920 wrote to memory of 2448	1920	cmd.exe	89
PID 4652 wrote to memory of 4236	4652	cmd.exe	91
PID 4652 wrote to memory of 4236	4652	cmd.exe	91
PID 4652 wrote to memory of 4236	4652	cmd.exe	91
PID 4504 wrote to memory of 2096	4504	Runtime Broker.exe	90
PID 4504 wrote to memory of 2096	4504	Runtime Broker.exe	90
PID 4504 wrote to memory of 2096	4504	Runtime Broker.exe	90
PID 4504 wrote to memory of 2096	4504	Runtime Broker.exe	90
PID 4504 wrote to memory of 2096	4504	Runtime Broker.exe	90
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92
PID 2096 wrote to memory of 4400	2096	iexplore.exe	92

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exeattrib.exe

pid	Process
2448	attrib.exe
4236	attrib.exe

C:\Users\Admin\AppData\Local\Temp\712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
"C:\Users\Admin\AppData\Local\Temp\712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1920
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:2448
- 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:4652
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:4236
- C:\Windows\SysWOW64\Runtime Broker.exe
  "C:\Windows\system32\Runtime Broker.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4504
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Adds Run key to start application
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2096
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      PID:4400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\Runtime Broker.exe

Filesize
658KB

MD5
25b08da1a964836d5b6d64ee0bcf30e0

SHA1
ad90af854d09a464b2ae958a93aa1cb713af1fb5

SHA256
712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134

SHA512
45a5f0aac1d12fe33c5bceaa2a6b226d5fbb85c99c035c608686bc6143ef4c0abc15d197dc947fae4e441d234e43cf32396894e71f2f62f369f806dbf4a9f4bc

Download Submit
memory/2096-15-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4180-0-0x0000000002250000-0x0000000002251000-memory.dmp

Filesize
4KB

Download
memory/4180-18-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4400-17-0x0000000000F50000-0x0000000000F51000-memory.dmp

Filesize
4KB

Download
memory/4504-14-0x0000000002170000-0x0000000002171000-memory.dmp

Filesize
4KB

Download
memory/4504-16-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download