darkcomet | dc659e2a3ae9c87215da2d9ad649553c5471987a7b4e143226a8142fb934f52d

General

Target

a20873c234b2d2c5af626ff4e1f4c6c4.exe
Size

252KB
MD5

0a6d39443f4e9faebb2675ff08435bc7
SHA1

6a70c0db2a49e608b456e615cbf734d6df93a5dd
SHA256

dc659e2a3ae9c87215da2d9ad649553c5471987a7b4e143226a8142fb934f52d
SHA512

68d7271a822d2b1307bba0ab80a8eace0c56f33195bdef076bcbcac44eaaf3459b71da832cad49f1512516b862b536cce6a8c2ee50700bbba6ecc100e358ab5a

Score

10^/10

darkcomet guest16 persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

ximer2020.ddns.net:1604

Mutex

DC_MUTEX-4U0HFC0

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
aDFqoxfKfrcR
install
true
offline_keylogger
true
password
82121020202222
persistence
true
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

T1004

Modify Registry

T1112

Processes:

a20873c234b2d2c5af626ff4e1f4c6c4.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	a20873c234b2d2c5af626ff4e1f4c6c4.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

2268 msdcsc.exe

pid	process
2268	msdcsc.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
behavioral2/memory/2516-6-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/2516-8-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/2516-9-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

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:

a20873c234b2d2c5af626ff4e1f4c6c4.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Control Panel\International\Geo\Nation	a20873c234b2d2c5af626ff4e1f4c6c4.exe

Deletes itself 1 IoCs

Processes:

notepad.exe

pid process

1308 notepad.exe

pid	process
1308	notepad.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

a20873c234b2d2c5af626ff4e1f4c6c4.exemsdcsc.exeiexplore.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	msdcsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

msdcsc.exe

description pid process target process

PID 2268 set thread context of 2516 2268 msdcsc.exe iexplore.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 2268 set thread context of 2516	2268	msdcsc.exe	iexplore.exe

Modifies registry class 1 IoCs

Processes:

a20873c234b2d2c5af626ff4e1f4c6c4.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance	a20873c234b2d2c5af626ff4e1f4c6c4.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

iexplore.exe

pid process

2516 iexplore.exe

pid	process
2516	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

a20873c234b2d2c5af626ff4e1f4c6c4.exemsdcsc.exeiexplore.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeSecurityPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeTakeOwnershipPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeLoadDriverPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeSystemProfilePrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeSystemtimePrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeProfSingleProcessPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeIncBasePriorityPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeCreatePagefilePrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeBackupPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeRestorePrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeShutdownPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeDebugPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeSystemEnvironmentPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeChangeNotifyPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeRemoteShutdownPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeUndockPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeManageVolumePrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeImpersonatePrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeCreateGlobalPrivilege	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: 33	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: 34	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: 35	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: 36	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe
Token: SeIncreaseQuotaPrivilege	2268	msdcsc.exe
Token: SeSecurityPrivilege	2268	msdcsc.exe
Token: SeTakeOwnershipPrivilege	2268	msdcsc.exe
Token: SeLoadDriverPrivilege	2268	msdcsc.exe
Token: SeSystemProfilePrivilege	2268	msdcsc.exe
Token: SeSystemtimePrivilege	2268	msdcsc.exe
Token: SeProfSingleProcessPrivilege	2268	msdcsc.exe
Token: SeIncBasePriorityPrivilege	2268	msdcsc.exe
Token: SeCreatePagefilePrivilege	2268	msdcsc.exe
Token: SeBackupPrivilege	2268	msdcsc.exe
Token: SeRestorePrivilege	2268	msdcsc.exe
Token: SeShutdownPrivilege	2268	msdcsc.exe
Token: SeDebugPrivilege	2268	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	2268	msdcsc.exe
Token: SeChangeNotifyPrivilege	2268	msdcsc.exe
Token: SeRemoteShutdownPrivilege	2268	msdcsc.exe
Token: SeUndockPrivilege	2268	msdcsc.exe
Token: SeManageVolumePrivilege	2268	msdcsc.exe
Token: SeImpersonatePrivilege	2268	msdcsc.exe
Token: SeCreateGlobalPrivilege	2268	msdcsc.exe
Token: 33	2268	msdcsc.exe
Token: 34	2268	msdcsc.exe
Token: 35	2268	msdcsc.exe
Token: 36	2268	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	2516	iexplore.exe
Token: SeSecurityPrivilege	2516	iexplore.exe
Token: SeTakeOwnershipPrivilege	2516	iexplore.exe
Token: SeLoadDriverPrivilege	2516	iexplore.exe
Token: SeSystemProfilePrivilege	2516	iexplore.exe
Token: SeSystemtimePrivilege	2516	iexplore.exe
Token: SeProfSingleProcessPrivilege	2516	iexplore.exe
Token: SeIncBasePriorityPrivilege	2516	iexplore.exe
Token: SeCreatePagefilePrivilege	2516	iexplore.exe
Token: SeBackupPrivilege	2516	iexplore.exe
Token: SeRestorePrivilege	2516	iexplore.exe
Token: SeShutdownPrivilege	2516	iexplore.exe
Token: SeDebugPrivilege	2516	iexplore.exe
Token: SeSystemEnvironmentPrivilege	2516	iexplore.exe
Token: SeChangeNotifyPrivilege	2516	iexplore.exe
Token: SeRemoteShutdownPrivilege	2516	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid process

2516 iexplore.exe

pid	process
2516	iexplore.exe

Suspicious use of WriteProcessMemory 47 IoCs

Processes:

a20873c234b2d2c5af626ff4e1f4c6c4.exemsdcsc.exeiexplore.exe

description	pid	process	target process
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 1308	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	notepad.exe
PID 3284 wrote to memory of 2268	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	msdcsc.exe
PID 3284 wrote to memory of 2268	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	msdcsc.exe
PID 3284 wrote to memory of 2268	3284	a20873c234b2d2c5af626ff4e1f4c6c4.exe	msdcsc.exe
PID 2268 wrote to memory of 2516	2268	msdcsc.exe	iexplore.exe
PID 2268 wrote to memory of 2516	2268	msdcsc.exe	iexplore.exe
PID 2268 wrote to memory of 2516	2268	msdcsc.exe	iexplore.exe
PID 2268 wrote to memory of 2516	2268	msdcsc.exe	iexplore.exe
PID 2268 wrote to memory of 2516	2268	msdcsc.exe	iexplore.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe
PID 2516 wrote to memory of 3208	2516	iexplore.exe	notepad.exe

C:\Users\Admin\AppData\Local\Temp\a20873c234b2d2c5af626ff4e1f4c6c4.exe
"C:\Users\Admin\AppData\Local\Temp\a20873c234b2d2c5af626ff4e1f4c6c4.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3284

C:\Windows\SysWOW64\notepad.exe
notepad
2⤵
- Deletes itself
PID:1308

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2268

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:2516

C:\Windows\SysWOW64\notepad.exe
notepad
4⤵
PID:3208

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
MD5
0a6d39443f4e9faebb2675ff08435bc7

SHA1
6a70c0db2a49e608b456e615cbf734d6df93a5dd

SHA256
dc659e2a3ae9c87215da2d9ad649553c5471987a7b4e143226a8142fb934f52d

SHA512
68d7271a822d2b1307bba0ab80a8eace0c56f33195bdef076bcbcac44eaaf3459b71da832cad49f1512516b862b536cce6a8c2ee50700bbba6ecc100e358ab5a

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
MD5
0a6d39443f4e9faebb2675ff08435bc7

SHA1
6a70c0db2a49e608b456e615cbf734d6df93a5dd

SHA256
dc659e2a3ae9c87215da2d9ad649553c5471987a7b4e143226a8142fb934f52d

SHA512
68d7271a822d2b1307bba0ab80a8eace0c56f33195bdef076bcbcac44eaaf3459b71da832cad49f1512516b862b536cce6a8c2ee50700bbba6ecc100e358ab5a

Download Submit
memory/1308-1-0x0000000002960000-0x0000000002961000-memory.dmp

Filesize
4KB

Download
memory/1308-0-0x0000000000000000-mapping.dmp

Download
memory/1308-2-0x0000000000000000-mapping.dmp

Download
memory/2268-3-0x0000000000000000-mapping.dmp

Download
memory/2516-6-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2516-7-0x00000000004B5820-mapping.dmp

Download
memory/2516-8-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2516-9-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3208-10-0x0000000000000000-mapping.dmp

Download
memory/3208-11-0x0000000000480000-0x0000000000481000-memory.dmp

Filesize
4KB

Download
memory/3208-12-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads