darkcomet | 7559e6ca8b77400f88bf4e67208a1c32570a670068eccae9e3d226cc5471bd47

Resubmissions

20-09-2024 07:43

240920-jkdj5avhqa 10

16-09-2024 13:49

240916-q4rz7a1apg 10

Analysis

max time kernel
152s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-09-2024 13:49

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General

Target

bazaar.2020.02/Backdoor.Win32.DarkKomet.exe
Size

251KB
MD5

b7b88850bc66c349bc02f81a3b443f39
SHA1

4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0
SHA256

4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5
SHA512

47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282
SSDEEP

6144:QcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37:QcW7KEZlPzCy37

Score

10^/10

darkcomet hacked discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

hacked

sexystar.myq-see.com:5552

Mutex

DC_MUTEX-6BSXQXU

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
1JlJEAuNqqm6
install
true
offline_keylogger
true
persistence
false
reg_key
MicroUpdate

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:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	Backdoor.Win32.DarkKomet.exe

Executes dropped EXE 1 IoCs

pid	Process
2344	msdcsc.exe

Loads dropped DLL 2 IoCs

pid	Process
2064	Backdoor.Win32.DarkKomet.exe
2064	Backdoor.Win32.DarkKomet.exe

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral7/memory/2064-0-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral7/memory/2064-11-0x0000000003240000-0x00000000032F7000-memory.dmp	upx
behavioral7/memory/2344-14-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral7/files/0x000300000001cfcb-16.dat	upx
behavioral7/memory/2064-18-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral7/memory/2344-19-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral7/memory/2344-23-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	Backdoor.Win32.DarkKomet.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 2 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Backdoor.Win32.DarkKomet.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeSecurityPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeTakeOwnershipPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeLoadDriverPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeSystemProfilePrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeSystemtimePrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeProfSingleProcessPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeIncBasePriorityPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeCreatePagefilePrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeBackupPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeRestorePrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeShutdownPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeDebugPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeSystemEnvironmentPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeChangeNotifyPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeRemoteShutdownPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeUndockPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeManageVolumePrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeImpersonatePrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: SeCreateGlobalPrivilege	2064	Backdoor.Win32.DarkKomet.exe
Token: 33	2064	Backdoor.Win32.DarkKomet.exe
Token: 34	2064	Backdoor.Win32.DarkKomet.exe
Token: 35	2064	Backdoor.Win32.DarkKomet.exe
Token: SeIncreaseQuotaPrivilege	2344	msdcsc.exe
Token: SeSecurityPrivilege	2344	msdcsc.exe
Token: SeTakeOwnershipPrivilege	2344	msdcsc.exe
Token: SeLoadDriverPrivilege	2344	msdcsc.exe
Token: SeSystemProfilePrivilege	2344	msdcsc.exe
Token: SeSystemtimePrivilege	2344	msdcsc.exe
Token: SeProfSingleProcessPrivilege	2344	msdcsc.exe
Token: SeIncBasePriorityPrivilege	2344	msdcsc.exe
Token: SeCreatePagefilePrivilege	2344	msdcsc.exe
Token: SeBackupPrivilege	2344	msdcsc.exe
Token: SeRestorePrivilege	2344	msdcsc.exe
Token: SeShutdownPrivilege	2344	msdcsc.exe
Token: SeDebugPrivilege	2344	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	2344	msdcsc.exe
Token: SeChangeNotifyPrivilege	2344	msdcsc.exe
Token: SeRemoteShutdownPrivilege	2344	msdcsc.exe
Token: SeUndockPrivilege	2344	msdcsc.exe
Token: SeManageVolumePrivilege	2344	msdcsc.exe
Token: SeImpersonatePrivilege	2344	msdcsc.exe
Token: SeCreateGlobalPrivilege	2344	msdcsc.exe
Token: 33	2344	msdcsc.exe
Token: 34	2344	msdcsc.exe
Token: 35	2344	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2344	msdcsc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2064 wrote to memory of 2344	2064	Backdoor.Win32.DarkKomet.exe	31
PID 2064 wrote to memory of 2344	2064	Backdoor.Win32.DarkKomet.exe	31
PID 2064 wrote to memory of 2344	2064	Backdoor.Win32.DarkKomet.exe	31
PID 2064 wrote to memory of 2344	2064	Backdoor.Win32.DarkKomet.exe	31

C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\Backdoor.Win32.DarkKomet.exe
"C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\Backdoor.Win32.DarkKomet.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2064
- C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
  "C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2344

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

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
251KB

MD5
b7b88850bc66c349bc02f81a3b443f39

SHA1
4c4fe6f2dc874ca6c3b1d117e8da00e7114860e0

SHA256
4c1b6befb06152412567869f27c006cba39f4ac3b1c5dbcf8694a65367444df5

SHA512
47c7cd05d6716eaefc1a4305f227e9f95423ede5bb991135d6839c0d1f4b65d7c204bc9c07696ec5d4f71214adc4d6b0976d2fe03d2434e68fd8637a40dad282

Download Submit
memory/2064-0-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2064-1-0x00000000002C0000-0x00000000002C1000-memory.dmp

Filesize
4KB

Download
memory/2064-11-0x0000000003240000-0x00000000032F7000-memory.dmp

Filesize
732KB

Download
memory/2064-12-0x0000000003240000-0x00000000032F7000-memory.dmp

Filesize
732KB

Download
memory/2064-18-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2344-15-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2344-14-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2344-19-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2344-21-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2344-23-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download

Resubmissions

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads