darkcomet | d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9

Analysis

max time kernel
148s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02-11-2024 11:26

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General

Target

d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
Size

3.9MB
MD5

c6def3cd8d68ad0f26661c40cc759340
SHA1

9bed9bb22b12f2845ff0710c1c479e6a5fbb8f35
SHA256

d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9
SHA512

fee9ae064bcc59cd12566683512bd0d2110bba707c1bd0b9996a2a10a541132ce11c715f43d306fc9bf5cf2957538e2d8bb868fbd0411ad38a642b81dbe3150d
SSDEEP

98304:IlX3KMj7yBNUVPhd5G0Z5DxdM3hZpmBAlB6D4tyX6kuT4IkQApCgvms0Cv05J5CQ:IlX3KMj7yBNUVPhd5G0Z5DxdM3hZpmBQ

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
2772	Soundcrd.exe
2676	Soundcrd.exe
2732	Soundcrd.exe

Loads dropped DLL 6 IoCs

Processes:

d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exeSoundcrd.exe

pid	Process
2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
2772	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-1-5-21-3290804112-2823094203-3137964600-1000\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 2772 set thread context of 2676	2772	Soundcrd.exe	35
PID 2772 set thread context of 2732	2772	Soundcrd.exe	36

UPX packed file 21 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2676-54-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-55-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-56-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2732-57-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2732-62-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2732-61-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2676-65-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-59-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2732-63-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2676-60-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2732-71-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2676-75-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-79-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-83-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-87-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-91-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2676-97-0x0000000000400000-0x00000000004B5000-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:

cmd.exereg.exeSoundcrd.exeSoundcrd.exeSoundcrd.exed8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.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 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
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Soundcrd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	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: SeIncreaseQuotaPrivilege	2676	Soundcrd.exe
Token: SeSecurityPrivilege	2676	Soundcrd.exe
Token: SeTakeOwnershipPrivilege	2676	Soundcrd.exe
Token: SeLoadDriverPrivilege	2676	Soundcrd.exe
Token: SeSystemProfilePrivilege	2676	Soundcrd.exe
Token: SeSystemtimePrivilege	2676	Soundcrd.exe
Token: SeProfSingleProcessPrivilege	2676	Soundcrd.exe
Token: SeIncBasePriorityPrivilege	2676	Soundcrd.exe
Token: SeCreatePagefilePrivilege	2676	Soundcrd.exe
Token: SeBackupPrivilege	2676	Soundcrd.exe
Token: SeRestorePrivilege	2676	Soundcrd.exe
Token: SeShutdownPrivilege	2676	Soundcrd.exe
Token: SeDebugPrivilege	2676	Soundcrd.exe
Token: SeSystemEnvironmentPrivilege	2676	Soundcrd.exe
Token: SeChangeNotifyPrivilege	2676	Soundcrd.exe
Token: SeRemoteShutdownPrivilege	2676	Soundcrd.exe
Token: SeUndockPrivilege	2676	Soundcrd.exe
Token: SeManageVolumePrivilege	2676	Soundcrd.exe
Token: SeImpersonatePrivilege	2676	Soundcrd.exe
Token: SeCreateGlobalPrivilege	2676	Soundcrd.exe
Token: 33	2676	Soundcrd.exe
Token: 34	2676	Soundcrd.exe
Token: 35	2676	Soundcrd.exe
Token: SeDebugPrivilege	2732	Soundcrd.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exeSoundcrd.exeSoundcrd.exe

pid	Process
2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
2772	Soundcrd.exe
2732	Soundcrd.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.execmd.exeSoundcrd.exe

description	pid	Process	procid_target
PID 2072 wrote to memory of 1040	2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	31
PID 2072 wrote to memory of 1040	2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	31
PID 2072 wrote to memory of 1040	2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	31
PID 2072 wrote to memory of 1040	2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	31
PID 1040 wrote to memory of 2668	1040	cmd.exe	33
PID 1040 wrote to memory of 2668	1040	cmd.exe	33
PID 1040 wrote to memory of 2668	1040	cmd.exe	33
PID 1040 wrote to memory of 2668	1040	cmd.exe	33
PID 2072 wrote to memory of 2772	2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	34
PID 2072 wrote to memory of 2772	2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	34
PID 2072 wrote to memory of 2772	2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	34
PID 2072 wrote to memory of 2772	2072	d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe	34
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2676	2772	Soundcrd.exe	35
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36
PID 2772 wrote to memory of 2732	2772	Soundcrd.exe	36

C:\Users\Admin\AppData\Local\Temp\d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe
"C:\Users\Admin\AppData\Local\Temp\d8f9321b26f86c6a510521a184b1fbfd4db8ffc5f097f4ba3830e84a9f59f3b9N.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tzJYg.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1040
- - 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:2668
- 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:2772
- - 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:2676
- - 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:2732

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\tzJYg.bat

Filesize
139B

MD5
173bcce4810d4901872d0ef4f0bfea4e

SHA1
561b03fdfe68b6419fddf57f32e1aab9a6126a2f

SHA256
10ea37eceabbe80fe9814280b66b957636951dbeeed18a9b4d50a1d24a6f1d1d

SHA512
2401e0a5e3f7bf590a0767449da2249d09717e8c1cb71a7475e81d9615580001cfc38705cd1a5b4edc33f7df043bf195e28e4a5442a32bc879dffc6473bd545e

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

Filesize
3.9MB

MD5
7328cf39cbf83fa7d047ed7c65857af0

SHA1
06e5adf31b34724e7c487724ae97bda9c3146014

SHA256
6b00f9bbd49eecef172362373c4ed69a4a6559c90f95c91332032bee06917102

SHA512
d537c9eb0a1c61e9ccd14d6577b5978d3e4329f7044decd3d4a307c2cef60ab4d7c4403c00d768ee41d147fb2f60c52f4ba99a3ac5715d7fa8084a2147ee9337

Download Submit
memory/2072-0-0x0000000000400000-0x00000000007EB000-memory.dmp

Filesize
3.9MB

Download
memory/2072-42-0x0000000003830000-0x0000000003C1B000-memory.dmp

Filesize
3.9MB

Download
memory/2072-43-0x0000000003830000-0x0000000003C1B000-memory.dmp

Filesize
3.9MB

Download
memory/2072-44-0x0000000003830000-0x0000000003C1B000-memory.dmp

Filesize
3.9MB

Download
memory/2072-46-0x0000000000400000-0x00000000007EB000-memory.dmp

Filesize
3.9MB

Download
memory/2676-55-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-97-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-52-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-75-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-56-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-91-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-87-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-54-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-83-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-65-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-59-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-66-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-79-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-60-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-69-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2676-70-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2732-62-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2732-71-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2732-63-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2732-61-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2732-57-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2772-64-0x0000000000400000-0x00000000007EB000-memory.dmp

Filesize
3.9MB

Download
memory/2772-51-0x0000000002BC0000-0x0000000002FAB000-memory.dmp

Filesize
3.9MB

Download