darkcomet | c0a04990363e1bc879a4f40f7adbd82fe6cb788d7da4b260812c75e032cd04c6

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-11-2024 21:01

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General

Target

file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Size

661KB
MD5

3d88bc329e71183ad337ecdfb0823b0c
SHA1

b2be7d64d44fb40b4afa498dd4829586bf2956c5
SHA256

c0a04990363e1bc879a4f40f7adbd82fe6cb788d7da4b260812c75e032cd04c6
SHA512

c83453bbb0bafec6f632e6b6feffc540622f97d47d4290f6b127e2fed31c7e8d20e9fda43eab3f592f56a3aa2ba66c2a39a752e2576de97e3d26e52b7cffe0a1
SSDEEP

12288:A9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/h:kZ1xuVVjfFoynPaVBUR8f+kN10EB

Score

10^/10

darkcomet guest16 discovery evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

test213.no-ip.info:1604

Mutex

DC_MUTEX-KHNEW06

Attributes

InstallPath
MSDCSC\runddl32.exe
gencode
F6FE8i2BxCpu
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

Signatures

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

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.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
4360	attrib.exe
4132	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:

file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe

Executes dropped EXE 1 IoCs

Processes:

runddl32.exe

pid	Process
2224	runddl32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exerunddl32.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\runddl32.exe"	runddl32.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.execmd.execmd.exeattrib.exeattrib.exerunddl32.exenotepad.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	runddl32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe

Modifies registry class 1 IoCs

Processes:

file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

runddl32.exe

pid	Process
2224	runddl32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exerunddl32.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeSecurityPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeTakeOwnershipPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeLoadDriverPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeSystemProfilePrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeSystemtimePrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeProfSingleProcessPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeIncBasePriorityPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeCreatePagefilePrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeBackupPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeRestorePrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeShutdownPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeDebugPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeSystemEnvironmentPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeChangeNotifyPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeRemoteShutdownPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeUndockPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeManageVolumePrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeImpersonatePrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeCreateGlobalPrivilege	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: 33	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: 34	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: 35	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: 36	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
Token: SeIncreaseQuotaPrivilege	2224	runddl32.exe
Token: SeSecurityPrivilege	2224	runddl32.exe
Token: SeTakeOwnershipPrivilege	2224	runddl32.exe
Token: SeLoadDriverPrivilege	2224	runddl32.exe
Token: SeSystemProfilePrivilege	2224	runddl32.exe
Token: SeSystemtimePrivilege	2224	runddl32.exe
Token: SeProfSingleProcessPrivilege	2224	runddl32.exe
Token: SeIncBasePriorityPrivilege	2224	runddl32.exe
Token: SeCreatePagefilePrivilege	2224	runddl32.exe
Token: SeBackupPrivilege	2224	runddl32.exe
Token: SeRestorePrivilege	2224	runddl32.exe
Token: SeShutdownPrivilege	2224	runddl32.exe
Token: SeDebugPrivilege	2224	runddl32.exe
Token: SeSystemEnvironmentPrivilege	2224	runddl32.exe
Token: SeChangeNotifyPrivilege	2224	runddl32.exe
Token: SeRemoteShutdownPrivilege	2224	runddl32.exe
Token: SeUndockPrivilege	2224	runddl32.exe
Token: SeManageVolumePrivilege	2224	runddl32.exe
Token: SeImpersonatePrivilege	2224	runddl32.exe
Token: SeCreateGlobalPrivilege	2224	runddl32.exe
Token: 33	2224	runddl32.exe
Token: 34	2224	runddl32.exe
Token: 35	2224	runddl32.exe
Token: 36	2224	runddl32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

runddl32.exe

pid	Process
2224	runddl32.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.execmd.execmd.exerunddl32.exe

description	pid	Process	procid_target
PID 1756 wrote to memory of 3900	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	85
PID 1756 wrote to memory of 3900	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	85
PID 1756 wrote to memory of 3900	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	85
PID 1756 wrote to memory of 4540	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	87
PID 1756 wrote to memory of 4540	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	87
PID 1756 wrote to memory of 4540	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	87
PID 3900 wrote to memory of 4360	3900	cmd.exe	89
PID 3900 wrote to memory of 4360	3900	cmd.exe	89
PID 3900 wrote to memory of 4360	3900	cmd.exe	89
PID 4540 wrote to memory of 4132	4540	cmd.exe	90
PID 4540 wrote to memory of 4132	4540	cmd.exe	90
PID 4540 wrote to memory of 4132	4540	cmd.exe	90
PID 1756 wrote to memory of 2224	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	91
PID 1756 wrote to memory of 2224	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	91
PID 1756 wrote to memory of 2224	1756	file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe	91
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92
PID 2224 wrote to memory of 1256	2224	runddl32.exe	92

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exeattrib.exe

pid	Process
4360	attrib.exe
4132	attrib.exe

C:\Users\Admin\AppData\Local\Temp\file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe
"C:\Users\Admin\AppData\Local\Temp\file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1756
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3900
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\file.0x3eee8690.0x85959ab8.ImageSectionObject.runddl32.exe" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:4360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4540
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:4132
- C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe
  "C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2224
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1256

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\MSDCSC\runddl32.exe

Filesize
661KB

MD5
3d88bc329e71183ad337ecdfb0823b0c

SHA1
b2be7d64d44fb40b4afa498dd4829586bf2956c5

SHA256
c0a04990363e1bc879a4f40f7adbd82fe6cb788d7da4b260812c75e032cd04c6

SHA512
c83453bbb0bafec6f632e6b6feffc540622f97d47d4290f6b127e2fed31c7e8d20e9fda43eab3f592f56a3aa2ba66c2a39a752e2576de97e3d26e52b7cffe0a1

Download Submit
memory/1256-63-0x0000000001000000-0x0000000001001000-memory.dmp

Filesize
4KB

Download
memory/1756-64-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1756-0-0x00000000022C0000-0x00000000022C1000-memory.dmp

Filesize
4KB

Download
memory/2224-70-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-71-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-66-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-67-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-68-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-69-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-62-0x0000000000770000-0x0000000000771000-memory.dmp

Filesize
4KB

Download
memory/2224-65-0x0000000000770000-0x0000000000771000-memory.dmp

Filesize
4KB

Download
memory/2224-72-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-73-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-74-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-75-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-76-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-77-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-78-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2224-79-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download