darkcomet | 8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28-10-2024 21:08

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General

Target

8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe
Size

574KB
MD5

c4513af27483655fb2712768c3091b00
SHA1

d18b248c14668cd10ddf6e6519be39736fa9acc2
SHA256

8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221
SHA512

4ee62f9287edf0274d749573fe2cc811905bf8f7d9163dc936ea73e3f4347c2204d9eb6e45f2d936651f9f704dd9813242beedb0e827717a7cfc1a6def2dd8b2
SSDEEP

12288:zCyEHAWAdljmJqkC3xMX85FSR2f9A08NIX+Vjwd4G/3z1ET4m3Hdsubm:zFhWAfn22m0eD1GPz8Hdxy

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
1856	Soundcrd.exe
2084	Soundcrd.exe
2604	Soundcrd.exe

Loads dropped DLL 7 IoCs

Processes:

8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exeSoundcrd.exe

pid	Process
2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe
2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe
2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe
2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe
2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe
1856	Soundcrd.exe
1856	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-1-5-21-312935884-697965778-3955649944-1000\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 1856 set thread context of 2084	1856	Soundcrd.exe	35
PID 1856 set thread context of 2604	1856	Soundcrd.exe	36

UPX packed file 19 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2084-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2604-67-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2084-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2604-61-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2604-60-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2604-57-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2084-56-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-68-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-72-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-73-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-76-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2604-78-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2084-82-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-86-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-90-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2084-94-0x0000000000400000-0x00000000004B5000-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:

Soundcrd.exe8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.execmd.exereg.exeSoundcrd.exeSoundcrd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Soundcrd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.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

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	2604	Soundcrd.exe
Token: SeIncreaseQuotaPrivilege	2084	Soundcrd.exe
Token: SeSecurityPrivilege	2084	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	2084	Soundcrd.exe
Token: SeLoadDriverPrivilege	2084	Soundcrd.exe
Token: SeSystemProfilePrivilege	2084	Soundcrd.exe
Token: SeSystemtimePrivilege	2084	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	2084	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	2084	Soundcrd.exe
Token: SeCreatePagefilePrivilege	2084	Soundcrd.exe
Token: SeBackupPrivilege	2084	Soundcrd.exe
Token: SeRestorePrivilege	2084	Soundcrd.exe
Token: SeShutdownPrivilege	2084	Soundcrd.exe
Token: SeDebugPrivilege	2084	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	2084	Soundcrd.exe
Token: SeChangeNotifyPrivilege	2084	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	2084	Soundcrd.exe
Token: SeUndockPrivilege	2084	Soundcrd.exe
Token: SeManageVolumePrivilege	2084	Soundcrd.exe
Token: SeImpersonatePrivilege	2084	Soundcrd.exe
Token: SeCreateGlobalPrivilege	2084	Soundcrd.exe
Token: 33	2084	Soundcrd.exe
Token: 34	2084	Soundcrd.exe
Token: 35	2084	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exeSoundcrd.exeSoundcrd.exe

pid	Process
2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe
1856	Soundcrd.exe
2604	Soundcrd.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.execmd.exeSoundcrd.exe

description	pid	Process	procid_target
PID 2756 wrote to memory of 2772	2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe	31
PID 2756 wrote to memory of 2772	2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe	31
PID 2756 wrote to memory of 2772	2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe	31
PID 2756 wrote to memory of 2772	2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe	31
PID 2772 wrote to memory of 2952	2772	cmd.exe	33
PID 2772 wrote to memory of 2952	2772	cmd.exe	33
PID 2772 wrote to memory of 2952	2772	cmd.exe	33
PID 2772 wrote to memory of 2952	2772	cmd.exe	33
PID 2756 wrote to memory of 1856	2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe	34
PID 2756 wrote to memory of 1856	2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe	34
PID 2756 wrote to memory of 1856	2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe	34
PID 2756 wrote to memory of 1856	2756	8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe	34
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2084	1856	Soundcrd.exe	35
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36
PID 1856 wrote to memory of 2604	1856	Soundcrd.exe	36

C:\Users\Admin\AppData\Local\Temp\8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe
"C:\Users\Admin\AppData\Local\Temp\8f58a508d5f6173b7894ad72cda79961b74b66a0e7e5b809d0eaf093a9f6a221N.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\eXGdR.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2772
- - 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:2952
- 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:1856
- - 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:2084
- - 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:2604

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\eXGdR.bat

Filesize
139B

MD5
173bcce4810d4901872d0ef4f0bfea4e

SHA1
561b03fdfe68b6419fddf57f32e1aab9a6126a2f

SHA256
10ea37eceabbe80fe9814280b66b957636951dbeeed18a9b4d50a1d24a6f1d1d

SHA512
2401e0a5e3f7bf590a0767449da2249d09717e8c1cb71a7475e81d9615580001cfc38705cd1a5b4edc33f7df043bf195e28e4a5442a32bc879dffc6473bd545e

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

Filesize
574KB

MD5
fcc849eea8cc615969257b2e342deb08

SHA1
9a64f1ea91b837f4762a1c0748a1743db034c5ac

SHA256
1bdfca4a604437187f96294cb46f3d44efabce3e21614a1dde4f096b5891fc8c

SHA512
c43689a851b9b20487448dc7bb288bf100993be0bd3a08e4c5131d25281572859488b8439b42abed6a0cbb781c8496239c7967c1c48a3df132b1855ec082489a

Download Submit
memory/1856-52-0x0000000002C30000-0x000000000301A000-memory.dmp

Filesize
3.9MB

Download
memory/1856-47-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/1856-75-0x0000000002D30000-0x000000000311A000-memory.dmp

Filesize
3.9MB

Download
memory/1856-65-0x0000000002D30000-0x000000000311A000-memory.dmp

Filesize
3.9MB

Download
memory/1856-62-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2084-72-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-82-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-94-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-90-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-66-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-86-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-53-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-73-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-76-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-56-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-68-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-69-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-70-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2084-71-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2604-61-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2604-57-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2604-78-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2604-60-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2604-67-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2756-0-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2756-74-0x0000000003A60000-0x0000000003E4A000-memory.dmp

Filesize
3.9MB

Download
memory/2756-46-0x0000000003A60000-0x0000000003E4A000-memory.dmp

Filesize
3.9MB

Download
memory/2756-45-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2756-44-0x0000000003A60000-0x0000000003E4A000-memory.dmp

Filesize
3.9MB

Download