darkcomet | 97e81fe572b0b43a79a678e04d1ec5f1c11243087e73708d0a1486eb3cc657ff

Analysis

max time kernel
230s
max time network
140s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
31/12/2023, 01:56

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General

Target

238df395c33b4b139cdfcd48a871b759.exe
Size

911KB
MD5

238df395c33b4b139cdfcd48a871b759
SHA1

b83cb7d627cdcf46a6ed89f68644ef5f2d9ed20f
SHA256

97e81fe572b0b43a79a678e04d1ec5f1c11243087e73708d0a1486eb3cc657ff
SHA512

be3654267d03d6f822497b52e34f3e77bd508d797d7184541528ae893f6784ffa754f040b1cfb46db79a1a9c43e097ca2228d6c180d189886aecc9aede65a8b4
SSDEEP

12288:d8UaT9XY2siA0bMG09xD7I3Gg8ecgVvfBoCDBOQQYbVXpuy1r/f:uUKoN0bUxgGa/pfBHDb+y1L

Score

10^/10

darkcomet persistence rat trojan upx

Malware Config

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\\Documents\\MSDCSC\\msdcsc.exe"	238df395c33b4b139cdfcd48a871b759.exe

Executes dropped EXE 1 IoCs

pid	Process
660	msdcsc.exe

Loads dropped DLL 2 IoCs

pid	Process
2544	238df395c33b4b139cdfcd48a871b759.exe
2544	238df395c33b4b139cdfcd48a871b759.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2544-0-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2544-1-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/files/0x001000000000b1f5-9.dat	upx
behavioral1/memory/660-13-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2544-14-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/660-18-0x0000000000400000-0x00000000004E5000-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-1-5-21-3308111660-3636268597-2291490419-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	238df395c33b4b139cdfcd48a871b759.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeSecurityPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeTakeOwnershipPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeLoadDriverPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeSystemProfilePrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeSystemtimePrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeProfSingleProcessPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeIncBasePriorityPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeCreatePagefilePrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeBackupPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeRestorePrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeShutdownPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeDebugPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeSystemEnvironmentPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeChangeNotifyPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeRemoteShutdownPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeUndockPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeManageVolumePrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeImpersonatePrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeCreateGlobalPrivilege	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: 33	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: 34	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: 35	2544	238df395c33b4b139cdfcd48a871b759.exe
Token: SeIncreaseQuotaPrivilege	660	msdcsc.exe
Token: SeSecurityPrivilege	660	msdcsc.exe
Token: SeTakeOwnershipPrivilege	660	msdcsc.exe
Token: SeLoadDriverPrivilege	660	msdcsc.exe
Token: SeSystemProfilePrivilege	660	msdcsc.exe
Token: SeSystemtimePrivilege	660	msdcsc.exe
Token: SeProfSingleProcessPrivilege	660	msdcsc.exe
Token: SeIncBasePriorityPrivilege	660	msdcsc.exe
Token: SeCreatePagefilePrivilege	660	msdcsc.exe
Token: SeBackupPrivilege	660	msdcsc.exe
Token: SeRestorePrivilege	660	msdcsc.exe
Token: SeShutdownPrivilege	660	msdcsc.exe
Token: SeDebugPrivilege	660	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	660	msdcsc.exe
Token: SeChangeNotifyPrivilege	660	msdcsc.exe
Token: SeRemoteShutdownPrivilege	660	msdcsc.exe
Token: SeUndockPrivilege	660	msdcsc.exe
Token: SeManageVolumePrivilege	660	msdcsc.exe
Token: SeImpersonatePrivilege	660	msdcsc.exe
Token: SeCreateGlobalPrivilege	660	msdcsc.exe
Token: 33	660	msdcsc.exe
Token: 34	660	msdcsc.exe
Token: 35	660	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
660	msdcsc.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 660	2544	238df395c33b4b139cdfcd48a871b759.exe	27
PID 2544 wrote to memory of 660	2544	238df395c33b4b139cdfcd48a871b759.exe	27
PID 2544 wrote to memory of 660	2544	238df395c33b4b139cdfcd48a871b759.exe	27
PID 2544 wrote to memory of 660	2544	238df395c33b4b139cdfcd48a871b759.exe	27
PID 660 wrote to memory of 1136	660	msdcsc.exe	28
PID 660 wrote to memory of 1136	660	msdcsc.exe	28
PID 660 wrote to memory of 1136	660	msdcsc.exe	28
PID 660 wrote to memory of 1136	660	msdcsc.exe	28
PID 660 wrote to memory of 2172	660	msdcsc.exe	29
PID 660 wrote to memory of 2172	660	msdcsc.exe	29
PID 660 wrote to memory of 2172	660	msdcsc.exe	29
PID 660 wrote to memory of 2172	660	msdcsc.exe	29

C:\Users\Admin\AppData\Local\Temp\238df395c33b4b139cdfcd48a871b759.exe
"C:\Users\Admin\AppData\Local\Temp\238df395c33b4b139cdfcd48a871b759.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
  "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:660
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    PID:1136
- - C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    3⤵
    PID:2172

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
911KB

MD5
238df395c33b4b139cdfcd48a871b759

SHA1
b83cb7d627cdcf46a6ed89f68644ef5f2d9ed20f

SHA256
97e81fe572b0b43a79a678e04d1ec5f1c11243087e73708d0a1486eb3cc657ff

SHA512
be3654267d03d6f822497b52e34f3e77bd508d797d7184541528ae893f6784ffa754f040b1cfb46db79a1a9c43e097ca2228d6c180d189886aecc9aede65a8b4

Download Submit
memory/660-13-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/660-16-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download
memory/660-18-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2544-0-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2544-1-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2544-2-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/2544-14-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads