darkcomet | 8c30104c9da821a254c49dd59dce24af2de9e4b4e4bb86c30399f05d43fd77a3

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02/04/2024, 13:53

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Size 658KB
Sample240402-q7akbacd64
SHA256 712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134
MD5 25b08da1a964836d5b6d64ee0bcf30e0
SHA1 ad90af854d09a464b2ae958a93aa1cb713af1fb5
SHA512 45a5f0aac1d12fe33c5bceaa2a6b226d5fbb85c99c035c608686bc6143ef4c0abc15d197dc947fae4e441d234e43cf32396894e71f2f62f369f806dbf4a9f4bc
SSDEEP 12288:+9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hj:KZ1xuVVjfFoynPaVBUR8f+kN10EBp
MD5 SHA1 SHA512 SSDEEP

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

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

pid	Process
3004	attrib.exe
2864	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

Executes dropped EXE 1 IoCs

pid	Process
4740	Runtime Broker.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RUNTIMEBROKHANDLER = "C:\\Windows\\system32\\Runtime Broker.exe"	Runtime Broker.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RUNTIMEBROKHANDLER = "C:\\Windows\\system32\\Runtime Broker.exe"	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

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

Web Service

T1102

flow	ioc
7	7.tcp.eu.ngrok.io

Drops file in System32 directory 3 IoCs

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

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

System Information Discovery
T1082

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4740	Runtime Broker.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSecurityPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeTakeOwnershipPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeLoadDriverPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemProfilePrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemtimePrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeProfSingleProcessPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeIncBasePriorityPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeCreatePagefilePrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeBackupPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeRestorePrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeShutdownPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeDebugPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemEnvironmentPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeChangeNotifyPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeRemoteShutdownPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeUndockPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeManageVolumePrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeImpersonatePrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeCreateGlobalPrivilege	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 33	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 34	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 35	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 36	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeIncreaseQuotaPrivilege	4740	Runtime Broker.exe
Token: SeSecurityPrivilege	4740	Runtime Broker.exe
Token: SeTakeOwnershipPrivilege	4740	Runtime Broker.exe
Token: SeLoadDriverPrivilege	4740	Runtime Broker.exe
Token: SeSystemProfilePrivilege	4740	Runtime Broker.exe
Token: SeSystemtimePrivilege	4740	Runtime Broker.exe
Token: SeProfSingleProcessPrivilege	4740	Runtime Broker.exe
Token: SeIncBasePriorityPrivilege	4740	Runtime Broker.exe
Token: SeCreatePagefilePrivilege	4740	Runtime Broker.exe
Token: SeBackupPrivilege	4740	Runtime Broker.exe
Token: SeRestorePrivilege	4740	Runtime Broker.exe
Token: SeShutdownPrivilege	4740	Runtime Broker.exe
Token: SeDebugPrivilege	4740	Runtime Broker.exe
Token: SeSystemEnvironmentPrivilege	4740	Runtime Broker.exe
Token: SeChangeNotifyPrivilege	4740	Runtime Broker.exe
Token: SeRemoteShutdownPrivilege	4740	Runtime Broker.exe
Token: SeUndockPrivilege	4740	Runtime Broker.exe
Token: SeManageVolumePrivilege	4740	Runtime Broker.exe
Token: SeImpersonatePrivilege	4740	Runtime Broker.exe
Token: SeCreateGlobalPrivilege	4740	Runtime Broker.exe
Token: 33	4740	Runtime Broker.exe
Token: 34	4740	Runtime Broker.exe
Token: 35	4740	Runtime Broker.exe
Token: 36	4740	Runtime Broker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4740	Runtime Broker.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 5036 wrote to memory of 4744	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	88
PID 5036 wrote to memory of 4744	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	88
PID 5036 wrote to memory of 4744	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	88
PID 5036 wrote to memory of 4428	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	90
PID 5036 wrote to memory of 4428	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	90
PID 5036 wrote to memory of 4428	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	90
PID 5036 wrote to memory of 4740	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	92
PID 5036 wrote to memory of 4740	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	92
PID 5036 wrote to memory of 4740	5036	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	92
PID 4740 wrote to memory of 4172	4740	Runtime Broker.exe	93
PID 4740 wrote to memory of 4172	4740	Runtime Broker.exe	93
PID 4740 wrote to memory of 4172	4740	Runtime Broker.exe	93
PID 4740 wrote to memory of 4612	4740	Runtime Broker.exe	94
PID 4740 wrote to memory of 4612	4740	Runtime Broker.exe	94
PID 4744 wrote to memory of 3004	4744	cmd.exe	96
PID 4744 wrote to memory of 3004	4744	cmd.exe	96
PID 4744 wrote to memory of 3004	4744	cmd.exe	96
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4740 wrote to memory of 4604	4740	Runtime Broker.exe	95
PID 4428 wrote to memory of 2864	4428	cmd.exe	97
PID 4428 wrote to memory of 2864	4428	cmd.exe	97
PID 4428 wrote to memory of 2864	4428	cmd.exe	97

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3004	attrib.exe
2864	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:5036
- 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:4744
- - 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:3004
- 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:4428
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:2864
- C:\Windows\SysWOW64\Runtime Broker.exe
  "C:\Windows\system32\Runtime Broker.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4740
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    PID:4172
- - C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    3⤵
    PID:4612
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    PID:4604

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

Loading Replay Monitor...

Downloads

Runtime Broker.exe

Path C:\Windows\SysWOW64\Runtime Broker.exe
Size 658KB
SHA256 712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134
MD5 25b08da1a964836d5b6d64ee0bcf30e0
SHA1 ad90af854d09a464b2ae958a93aa1cb713af1fb5
SHA512 45a5f0aac1d12fe33c5bceaa2a6b226d5fbb85c99c035c608686bc6143ef4c0abc15d197dc947fae4e441d234e43cf32396894e71f2f62f369f806dbf4a9f4bc
SSDEEP 12288:+9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hj:KZ1xuVVjfFoynPaVBUR8f+kN10EBp
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4604-15-0x0000000000AF0000-0x0000000000AF1000-memory.dmp

Download

memory/4740-14-0x0000000002180000-0x0000000002181000-memory.dmp

Download

memory/4740-17-0x0000000000400000-0x00000000004B2000-memory.dmp

Download

memory/5036-0-0x00000000023C0000-0x00000000023C1000-memory.dmp

Download

memory/5036-16-0x0000000000400000-0x00000000004B2000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads