darkcomet | 3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efd

Analysis

max time kernel
117s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29-10-2024 10:47

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General

Target

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
Size

574KB
MD5

5d2a655b4568181ed1944d5a7259e540
SHA1

d3f1b3f94a6dea9075a03811f222e7ad9b377bd2
SHA256

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efd
SHA512

9b31267129ce95265215b96080dd81709faea2cda61d258cadb63048f14d1b0ef6a9e5fcbe375b5bd63c49882ce26cc1e77ac2227e6d6aaab54585435da1fa16
SSDEEP

12288:zCyEHAWAdljmJqkC3xMX85FSR2f9A08NIX+Vjwd4G/3z1ET4m3Hdsubv:zFhWAfn22m0eD1GPz8HdxL

Score

10^/10

darkcomet discovery persistence rat trojan upx

Malware Config

Signatures

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

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Soundcrd.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	Soundcrd.exe

Executes dropped EXE 3 IoCs

Processes:

Soundcrd.exeSoundcrd.exeSoundcrd.exe

pid	Process
2344	Soundcrd.exe
2736	Soundcrd.exe
2808	Soundcrd.exe

Loads dropped DLL 7 IoCs

Processes:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exeSoundcrd.exe

pid	Process
2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
2344	Soundcrd.exe
2344	Soundcrd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\Mcrosoftt = "C:\\Users\\Admin\\AppData\\Roaming\\Soundcrd.exe"	reg.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Soundcrd.exe

description	pid	Process	procid_target
PID 2344 set thread context of 2736	2344	Soundcrd.exe	34
PID 2344 set thread context of 2808	2344	Soundcrd.exe	35

UPX packed file 20 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2736-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2808-63-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2736-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2808-58-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2808-57-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2808-55-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2736-64-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-65-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-67-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-68-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2808-72-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2736-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-77-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-81-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-85-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-89-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2736-93-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

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 6 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:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.execmd.exereg.exeSoundcrd.exeSoundcrd.exeSoundcrd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Soundcrd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Soundcrd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Soundcrd.exe

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Soundcrd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Soundcrd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Soundcrd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Soundcrd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	Soundcrd.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

Soundcrd.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	Soundcrd.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

Soundcrd.exeSoundcrd.exe

description	pid	Process
Token: SeDebugPrivilege	2808	Soundcrd.exe
Token: SeIncreaseQuotaPrivilege	2736	Soundcrd.exe
Token: SeSecurityPrivilege	2736	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	2736	Soundcrd.exe
Token: SeLoadDriverPrivilege	2736	Soundcrd.exe
Token: SeSystemProfilePrivilege	2736	Soundcrd.exe
Token: SeSystemtimePrivilege	2736	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	2736	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	2736	Soundcrd.exe
Token: SeCreatePagefilePrivilege	2736	Soundcrd.exe
Token: SeBackupPrivilege	2736	Soundcrd.exe
Token: SeRestorePrivilege	2736	Soundcrd.exe
Token: SeShutdownPrivilege	2736	Soundcrd.exe
Token: SeDebugPrivilege	2736	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	2736	Soundcrd.exe
Token: SeChangeNotifyPrivilege	2736	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	2736	Soundcrd.exe
Token: SeUndockPrivilege	2736	Soundcrd.exe
Token: SeManageVolumePrivilege	2736	Soundcrd.exe
Token: SeImpersonatePrivilege	2736	Soundcrd.exe
Token: SeCreateGlobalPrivilege	2736	Soundcrd.exe
Token: 33	2736	Soundcrd.exe
Token: 34	2736	Soundcrd.exe
Token: 35	2736	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exeSoundcrd.exeSoundcrd.exe

pid	Process
2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
2344	Soundcrd.exe
2808	Soundcrd.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.execmd.exeSoundcrd.exe

description	pid	Process	procid_target
PID 2936 wrote to memory of 2324	2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	30
PID 2936 wrote to memory of 2324	2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	30
PID 2936 wrote to memory of 2324	2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	30
PID 2936 wrote to memory of 2324	2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	30
PID 2324 wrote to memory of 2800	2324	cmd.exe	32
PID 2324 wrote to memory of 2800	2324	cmd.exe	32
PID 2324 wrote to memory of 2800	2324	cmd.exe	32
PID 2324 wrote to memory of 2800	2324	cmd.exe	32
PID 2936 wrote to memory of 2344	2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	33
PID 2936 wrote to memory of 2344	2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	33
PID 2936 wrote to memory of 2344	2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	33
PID 2936 wrote to memory of 2344	2936	3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe	33
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2736	2344	Soundcrd.exe	34
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35
PID 2344 wrote to memory of 2808	2344	Soundcrd.exe	35

C:\Users\Admin\AppData\Local\Temp\3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe
"C:\Users\Admin\AppData\Local\Temp\3b4b5205831d94bb1975627f70e52acfbe84464cd38263eeb6a60de2582c5efdN.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2936
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\ekwGs.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Mcrosoftt" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Soundcrd.exe" /f
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:2800
- C:\Users\Admin\AppData\Roaming\Soundcrd.exe
  "C:\Users\Admin\AppData\Roaming\Soundcrd.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2344
- - C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    PID:2736
- - C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    C:\Users\Admin\AppData\Roaming\Soundcrd.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2808

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

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\ekwGs.bat

Filesize
139B

MD5
173bcce4810d4901872d0ef4f0bfea4e

SHA1
561b03fdfe68b6419fddf57f32e1aab9a6126a2f

SHA256
10ea37eceabbe80fe9814280b66b957636951dbeeed18a9b4d50a1d24a6f1d1d

SHA512
2401e0a5e3f7bf590a0767449da2249d09717e8c1cb71a7475e81d9615580001cfc38705cd1a5b4edc33f7df043bf195e28e4a5442a32bc879dffc6473bd545e

Download Submit
\Users\Admin\AppData\Roaming\Soundcrd.exe

Filesize
574KB

MD5
3705d48557a1547494f4bbdcff3fec73

SHA1
bb02493b34e2092b2621e568782ac08af61ab92d

SHA256
bd9bbffa30faa01adb6bd4d2b9675e3cf0cd6e41f0ac17e77d380c12422a4731

SHA512
683f862effe735d0c831c0352fa161cdae40def8ee8a5daf3cc27c17aee4f564a82fa7c30595cd0aa8019e142f6bca04cb4ef428b92786fcd9aa53550dfb3fcc

Download Submit
memory/2344-50-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2344-61-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2736-64-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-65-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-93-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-53-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-89-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-62-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-51-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-85-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-81-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-77-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-71-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-68-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-67-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-66-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2736-69-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2808-72-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2808-55-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2808-57-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2808-58-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2808-63-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2936-47-0x0000000003A00000-0x0000000003DEA000-memory.dmp

Filesize
3.9MB

Download
memory/2936-70-0x0000000003A00000-0x0000000003DEA000-memory.dmp

Filesize
3.9MB

Download
memory/2936-2-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2936-44-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download