darkcomet | ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e

Analysis

max time kernel
149s
max time network
122s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
27-06-2024 01:20

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General

Target

ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe
Size

576KB
MD5

3efacdc5d8b08bded895cc7c19006c49
SHA1

e36ffbcbaa744cd1c13b2ed09ee109f03bb7eae1
SHA256

ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e
SHA512

bf813a15eec83b58c21932bbd04127d78d4045b7b1a03f6eaaf8b032f7220e307821b4e0604e801e3d185d57ea9b47f77e628a3d5fa4462f7d2bcb84e0e0e39c
SSDEEP

12288:+NWPkHlUkErBuxQ4uzi6d6dL/yiXLzeMdK6io8levy0FhVlpzkzDDoSP:+NWPkHlUfBgpuPdWzyuDTifgyWlI

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

UPX dump on OEP (original entry point) 29 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2192-0-0x0000000000400000-0x00000000007C8000-memory.dmp	UPX
C:\Users\Admin\AppData\Roaming\mcsft.exe	UPX
behavioral1/memory/2192-47-0x0000000000400000-0x00000000007C8000-memory.dmp	UPX
behavioral1/memory/2612-52-0x0000000002C00000-0x0000000002FC8000-memory.dmp	UPX
behavioral1/memory/2920-56-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2612-58-0x0000000000400000-0x00000000007C8000-memory.dmp	UPX
behavioral1/memory/2920-53-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-59-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-61-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-60-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-62-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-64-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-63-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-65-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-66-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-67-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-68-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-69-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-70-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-71-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-72-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-73-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-74-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-75-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-76-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-77-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-78-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-79-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX
behavioral1/memory/2920-80-0x0000000000400000-0x00000000004B5000-memory.dmp	UPX

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:

mcsft.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate mcsft.exe
Executes dropped EXE 2 IoCs

Processes:

mcsft.exemcsft.exe

pid process

2612 mcsft.exe
2920 mcsft.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	mcsft.exe

pid	process
2612	mcsft.exe
2920	mcsft.exe

Loads dropped DLL 6 IoCs

Processes:

ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exemcsft.exe

pid	process
2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe
2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe
2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe
2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe
2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe
2612	mcsft.exe

UPX packed file 29 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2192-0-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
C:\Users\Admin\AppData\Roaming\mcsft.exe	upx
behavioral1/memory/2192-47-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral1/memory/2612-52-0x0000000002C00000-0x0000000002FC8000-memory.dmp	upx
behavioral1/memory/2920-56-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2612-58-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral1/memory/2920-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-59-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-61-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-60-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-64-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-63-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-65-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-67-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-68-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-72-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-73-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-74-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-75-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-76-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-77-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-78-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-79-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2920-80-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

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-1-5-21-39690363-730359138-1046745555-1000\Software\Microsoft\Windows\CurrentVersion\Run\Mcrosoft = "C:\\Users\\Admin\\AppData\\Roaming\\mcsft.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

mcsft.exe

description pid process target process

PID 2612 set thread context of 2920 2612 mcsft.exe mcsft.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	pid	process	target process
PID 2612 set thread context of 2920	2612	mcsft.exe	mcsft.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:

mcsft.exe

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

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

mcsft.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier mcsft.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	mcsft.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

Processes:

mcsft.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2920	mcsft.exe
Token: SeSecurityPrivilege	2920	mcsft.exe
Token: SeTakeOwnershipPrivilege	2920	mcsft.exe
Token: SeLoadDriverPrivilege	2920	mcsft.exe
Token: SeSystemProfilePrivilege	2920	mcsft.exe
Token: SeSystemtimePrivilege	2920	mcsft.exe
Token: SeProfSingleProcessPrivilege	2920	mcsft.exe
Token: SeIncBasePriorityPrivilege	2920	mcsft.exe
Token: SeCreatePagefilePrivilege	2920	mcsft.exe
Token: SeBackupPrivilege	2920	mcsft.exe
Token: SeRestorePrivilege	2920	mcsft.exe
Token: SeShutdownPrivilege	2920	mcsft.exe
Token: SeDebugPrivilege	2920	mcsft.exe
Token: SeSystemEnvironmentPrivilege	2920	mcsft.exe
Token: SeChangeNotifyPrivilege	2920	mcsft.exe
Token: SeRemoteShutdownPrivilege	2920	mcsft.exe
Token: SeUndockPrivilege	2920	mcsft.exe
Token: SeManageVolumePrivilege	2920	mcsft.exe
Token: SeImpersonatePrivilege	2920	mcsft.exe
Token: SeCreateGlobalPrivilege	2920	mcsft.exe
Token: 33	2920	mcsft.exe
Token: 34	2920	mcsft.exe
Token: 35	2920	mcsft.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exemcsft.exemcsft.exe

pid process

2192 ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe
2612 mcsft.exe
2920 mcsft.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.execmd.exemcsft.exe

description	pid	process	target process
PID 2192 wrote to memory of 2292	2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe	cmd.exe
PID 2192 wrote to memory of 2292	2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe	cmd.exe
PID 2192 wrote to memory of 2292	2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe	cmd.exe
PID 2192 wrote to memory of 2292	2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe	cmd.exe
PID 2292 wrote to memory of 2564	2292	cmd.exe	reg.exe
PID 2292 wrote to memory of 2564	2292	cmd.exe	reg.exe
PID 2292 wrote to memory of 2564	2292	cmd.exe	reg.exe
PID 2292 wrote to memory of 2564	2292	cmd.exe	reg.exe
PID 2192 wrote to memory of 2612	2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe	mcsft.exe
PID 2192 wrote to memory of 2612	2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe	mcsft.exe
PID 2192 wrote to memory of 2612	2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe	mcsft.exe
PID 2192 wrote to memory of 2612	2192	ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe
PID 2612 wrote to memory of 2920	2612	mcsft.exe	mcsft.exe

C:\Users\Admin\AppData\Local\Temp\ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe
"C:\Users\Admin\AppData\Local\Temp\ead5b40f50442f6a9a9360192332535e4b2bd1507005e24d78ff3e354210c00e.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2192

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\USrMk.bat" "
2⤵
- Suspicious use of WriteProcessMemory
PID:2292

C:\Windows\SysWOW64\reg.exe
REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Mcrosoft" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\mcsft.exe" /f
3⤵
- Adds Run key to start application
PID:2564

C:\Users\Admin\AppData\Roaming\mcsft.exe
"C:\Users\Admin\AppData\Roaming\mcsft.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2612

C:\Users\Admin\AppData\Roaming\mcsft.exe
C:\Users\Admin\AppData\Roaming\mcsft.exe
3⤵
- Checks BIOS information in registry
- Executes dropped EXE
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2920

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\USrMk.bat
Filesize
135B

MD5
a5feca573884d76f559b996d45e8ad9a

SHA1
0e81a993f3af4e31d60653dc2513186f0495f1c8

SHA256
c98e20d46d6465febb5d29cfab51241521ea5d6cd621f5e18b9b7d6fbfac3f0f

SHA512
a9239648b5f15eac4d4151b6e1bdc81065eeaeb101404c2a0126f03bc87f1e6a57206bfa07a44379e9d3bba889e4497a9991ff41fb109099b01512df3dc3cbda

Download Submit
C:\Users\Admin\AppData\Roaming\mcsft.exe
Filesize
576KB

MD5
8638f0d1eecc2089a5cf465dedd30925

SHA1
f1263030ca84e9c8bd661712f2772071c9660007

SHA256
289fc5dc827d8e1876f31bb58a67abf0efaad32e70178f31baeb930c65e9b485

SHA512
abcc3fed2b0b1e6bc56c8d90f40fc0371c48248b66049baea50de1762fa2468d1d4ef25b0ba1951ef4be3ac5910982a46c97607906d1701e5cdd1b9c71052f15

Download Submit
memory/2192-42-0x0000000003270000-0x0000000003638000-memory.dmp

Filesize
3.8MB

Download
memory/2192-43-0x0000000003270000-0x0000000003638000-memory.dmp

Filesize
3.8MB

Download
memory/2192-44-0x0000000003270000-0x0000000003638000-memory.dmp

Filesize
3.8MB

Download
memory/2192-47-0x0000000000400000-0x00000000007C8000-memory.dmp

Filesize
3.8MB

Download
memory/2192-0-0x0000000000400000-0x00000000007C8000-memory.dmp

Filesize
3.8MB

Download
memory/2612-58-0x0000000000400000-0x00000000007C8000-memory.dmp

Filesize
3.8MB

Download
memory/2612-52-0x0000000002C00000-0x0000000002FC8000-memory.dmp

Filesize
3.8MB

Download
memory/2920-63-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-68-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-59-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-61-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-60-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-62-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-64-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-56-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-65-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-66-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-67-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-53-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-69-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-70-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-71-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-72-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-73-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-74-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-75-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-76-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-77-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-78-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-79-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2920-80-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download