darkcomet | 8c30104c9da821a254c49dd59dce24af2de9e4b4e4bb86c30399f05d43fd77a3

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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
2544	attrib.exe
2564	attrib.exe

Executes dropped EXE 1 IoCs

Processes:

Runtime Broker.exe

pid	Process
2668	Runtime Broker.exe

Loads dropped DLL 2 IoCs

Processes:

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

pid	Process
2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Runtime Broker.exeiexplore.exe712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000\Software\Microsoft\Windows\CurrentVersion\Run\RUNTIMEBROKHANDLER = "C:\\Windows\\system32\\Runtime Broker.exe"	Runtime Broker.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000\Software\Microsoft\Windows\CurrentVersion\Run\RUNTIMEBROKHANDLER = "C:\\Windows\\system32\\Runtime Broker.exe"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000\Software\Microsoft\Windows\CurrentVersion\Run\RUNTIMEBROKHANDLER = "C:\\Windows\\system32\\Runtime Broker.exe"	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe

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

Web Service

T1102

Processes:

flow	ioc
2	7.tcp.eu.ngrok.io
24	7.tcp.eu.ngrok.io
68	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 2668 set thread context of 2644	2668	Runtime Broker.exe	35

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
2644	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exeRuntime Broker.exeiexplore.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSecurityPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeTakeOwnershipPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeLoadDriverPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemProfilePrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemtimePrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeProfSingleProcessPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeIncBasePriorityPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeCreatePagefilePrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeBackupPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeRestorePrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeShutdownPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeDebugPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeSystemEnvironmentPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeChangeNotifyPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeRemoteShutdownPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeUndockPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeManageVolumePrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeImpersonatePrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeCreateGlobalPrivilege	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 33	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 34	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: 35	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
Token: SeIncreaseQuotaPrivilege	2668	Runtime Broker.exe
Token: SeSecurityPrivilege	2668	Runtime Broker.exe
Token: SeTakeOwnershipPrivilege	2668	Runtime Broker.exe
Token: SeLoadDriverPrivilege	2668	Runtime Broker.exe
Token: SeSystemProfilePrivilege	2668	Runtime Broker.exe
Token: SeSystemtimePrivilege	2668	Runtime Broker.exe
Token: SeProfSingleProcessPrivilege	2668	Runtime Broker.exe
Token: SeIncBasePriorityPrivilege	2668	Runtime Broker.exe
Token: SeCreatePagefilePrivilege	2668	Runtime Broker.exe
Token: SeBackupPrivilege	2668	Runtime Broker.exe
Token: SeRestorePrivilege	2668	Runtime Broker.exe
Token: SeShutdownPrivilege	2668	Runtime Broker.exe
Token: SeDebugPrivilege	2668	Runtime Broker.exe
Token: SeSystemEnvironmentPrivilege	2668	Runtime Broker.exe
Token: SeChangeNotifyPrivilege	2668	Runtime Broker.exe
Token: SeRemoteShutdownPrivilege	2668	Runtime Broker.exe
Token: SeUndockPrivilege	2668	Runtime Broker.exe
Token: SeManageVolumePrivilege	2668	Runtime Broker.exe
Token: SeImpersonatePrivilege	2668	Runtime Broker.exe
Token: SeCreateGlobalPrivilege	2668	Runtime Broker.exe
Token: 33	2668	Runtime Broker.exe
Token: 34	2668	Runtime Broker.exe
Token: 35	2668	Runtime Broker.exe
Token: SeIncreaseQuotaPrivilege	2644	iexplore.exe
Token: SeSecurityPrivilege	2644	iexplore.exe
Token: SeTakeOwnershipPrivilege	2644	iexplore.exe
Token: SeLoadDriverPrivilege	2644	iexplore.exe
Token: SeSystemProfilePrivilege	2644	iexplore.exe
Token: SeSystemtimePrivilege	2644	iexplore.exe
Token: SeProfSingleProcessPrivilege	2644	iexplore.exe
Token: SeIncBasePriorityPrivilege	2644	iexplore.exe
Token: SeCreatePagefilePrivilege	2644	iexplore.exe
Token: SeBackupPrivilege	2644	iexplore.exe
Token: SeRestorePrivilege	2644	iexplore.exe
Token: SeShutdownPrivilege	2644	iexplore.exe
Token: SeDebugPrivilege	2644	iexplore.exe
Token: SeSystemEnvironmentPrivilege	2644	iexplore.exe
Token: SeChangeNotifyPrivilege	2644	iexplore.exe
Token: SeRemoteShutdownPrivilege	2644	iexplore.exe
Token: SeUndockPrivilege	2644	iexplore.exe
Token: SeManageVolumePrivilege	2644	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid	Process
2644	iexplore.exe

Suspicious use of WriteProcessMemory 49 IoCs

Processes:

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

description	pid	Process	procid_target
PID 2088 wrote to memory of 2336	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	28
PID 2088 wrote to memory of 2336	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	28
PID 2088 wrote to memory of 2336	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	28
PID 2088 wrote to memory of 2336	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	28
PID 2088 wrote to memory of 1988	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	29
PID 2088 wrote to memory of 1988	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	29
PID 2088 wrote to memory of 1988	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	29
PID 2088 wrote to memory of 1988	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	29
PID 2088 wrote to memory of 2668	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	32
PID 2088 wrote to memory of 2668	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	32
PID 2088 wrote to memory of 2668	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	32
PID 2088 wrote to memory of 2668	2088	712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe	32
PID 1988 wrote to memory of 2564	1988	cmd.exe	33
PID 1988 wrote to memory of 2564	1988	cmd.exe	33
PID 1988 wrote to memory of 2564	1988	cmd.exe	33
PID 1988 wrote to memory of 2564	1988	cmd.exe	33
PID 2336 wrote to memory of 2544	2336	cmd.exe	34
PID 2336 wrote to memory of 2544	2336	cmd.exe	34
PID 2336 wrote to memory of 2544	2336	cmd.exe	34
PID 2336 wrote to memory of 2544	2336	cmd.exe	34
PID 2668 wrote to memory of 2644	2668	Runtime Broker.exe	35
PID 2668 wrote to memory of 2644	2668	Runtime Broker.exe	35
PID 2668 wrote to memory of 2644	2668	Runtime Broker.exe	35
PID 2668 wrote to memory of 2644	2668	Runtime Broker.exe	35
PID 2668 wrote to memory of 2644	2668	Runtime Broker.exe	35
PID 2668 wrote to memory of 2644	2668	Runtime Broker.exe	35
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36
PID 2644 wrote to memory of 2480	2644	iexplore.exe	36

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exeattrib.exe

pid	Process
2544	attrib.exe
2564	attrib.exe

C:\Users\Admin\AppData\Local\Temp\712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe
"C:\Users\Admin\AppData\Local\Temp\712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2088
- 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:2336
- - 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:2544
- 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:1988
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:2564
- 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:2668
- - 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:2644
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      PID:2480

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\SysWOW64\Runtime Broker.exe

Filesize
658KB

MD5
25b08da1a964836d5b6d64ee0bcf30e0

SHA1
ad90af854d09a464b2ae958a93aa1cb713af1fb5

SHA256
712f8fe73fc9955808359aa68bb2e898c6661b4cf7de0f0dc27fd668dca17134

SHA512
45a5f0aac1d12fe33c5bceaa2a6b226d5fbb85c99c035c608686bc6143ef4c0abc15d197dc947fae4e441d234e43cf32396894e71f2f62f369f806dbf4a9f4bc

Download Submit
memory/2088-0-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2088-44-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2480-16-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/2480-43-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2644-14-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2668-12-0x00000000002D0000-0x00000000002D1000-memory.dmp

Filesize
4KB

Download
memory/2668-15-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download