darkcomet | fec8c19e1915a8d64f709db2021902713998b20826dda3128a8dd2a414dd7172

Analysis

max time kernel
139s
max time network
146s
platform
windows7_x64
resource
win7v20201028
submitted
17-11-2020 12:05

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General

Target

309a5f9f926b2fa365a94cbf98214566.exe
Size

559KB
MD5

e4e5a0ee373f5b6085efdb3f2a5f0071
SHA1

85e6daa5792408d4cb4f23767436759f03b683ac
SHA256

fec8c19e1915a8d64f709db2021902713998b20826dda3128a8dd2a414dd7172
SHA512

549bb1c0256b45cf5c7342e915bfd6c5adc1c4ff9d27e13756e5468edbcd2dbf07fbd9ec712ac757c0226d41d2b57ff159968368e18d66485fc74568d0e67658

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
Executes dropped EXE 2 IoCs

Processes:

mcsft.exemcsft.exe

pid process

1700 mcsft.exe
1360 mcsft.exe

pid	process
1700	mcsft.exe
1360	mcsft.exe

UPX packed file 12 IoCs

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

upx

Processes:

yara_rule
upx
\Users\Admin\AppData\Roaming\mcsft.exe	upx
\Users\Admin\AppData\Roaming\mcsft.exe	upx
\Users\Admin\AppData\Roaming\mcsft.exe	upx
\Users\Admin\AppData\Roaming\mcsft.exe	upx
\Users\Admin\AppData\Roaming\mcsft.exe	upx
C:\Users\Admin\AppData\Roaming\mcsft.exe	upx
C:\Users\Admin\AppData\Roaming\mcsft.exe	upx
behavioral1/memory/1360-15-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
C:\Users\Admin\AppData\Roaming\mcsft.exe	upx
behavioral1/memory/1360-18-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1360-19-0x0000000000400000-0x00000000004B5000-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

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

Loads dropped DLL 5 IoCs

Processes:

309a5f9f926b2fa365a94cbf98214566.exe

pid	process
1668	309a5f9f926b2fa365a94cbf98214566.exe
1668	309a5f9f926b2fa365a94cbf98214566.exe
1668	309a5f9f926b2fa365a94cbf98214566.exe
1668	309a5f9f926b2fa365a94cbf98214566.exe
1668	309a5f9f926b2fa365a94cbf98214566.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\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 1700 set thread context of 1360 1700 mcsft.exe mcsft.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 1700 set thread context of 1360	1700	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 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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	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	1360	mcsft.exe
Token: SeSecurityPrivilege	1360	mcsft.exe
Token: SeTakeOwnershipPrivilege	1360	mcsft.exe
Token: SeLoadDriverPrivilege	1360	mcsft.exe
Token: SeSystemProfilePrivilege	1360	mcsft.exe
Token: SeSystemtimePrivilege	1360	mcsft.exe
Token: SeProfSingleProcessPrivilege	1360	mcsft.exe
Token: SeIncBasePriorityPrivilege	1360	mcsft.exe
Token: SeCreatePagefilePrivilege	1360	mcsft.exe
Token: SeBackupPrivilege	1360	mcsft.exe
Token: SeRestorePrivilege	1360	mcsft.exe
Token: SeShutdownPrivilege	1360	mcsft.exe
Token: SeDebugPrivilege	1360	mcsft.exe
Token: SeSystemEnvironmentPrivilege	1360	mcsft.exe
Token: SeChangeNotifyPrivilege	1360	mcsft.exe
Token: SeRemoteShutdownPrivilege	1360	mcsft.exe
Token: SeUndockPrivilege	1360	mcsft.exe
Token: SeManageVolumePrivilege	1360	mcsft.exe
Token: SeImpersonatePrivilege	1360	mcsft.exe
Token: SeCreateGlobalPrivilege	1360	mcsft.exe
Token: 33	1360	mcsft.exe
Token: 34	1360	mcsft.exe
Token: 35	1360	mcsft.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

309a5f9f926b2fa365a94cbf98214566.exemcsft.exemcsft.exe

pid process

1668 309a5f9f926b2fa365a94cbf98214566.exe
1700 mcsft.exe
1360 mcsft.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

309a5f9f926b2fa365a94cbf98214566.execmd.exemcsft.exe

description	pid	process	target process
PID 1668 wrote to memory of 628	1668	309a5f9f926b2fa365a94cbf98214566.exe	cmd.exe
PID 1668 wrote to memory of 628	1668	309a5f9f926b2fa365a94cbf98214566.exe	cmd.exe
PID 1668 wrote to memory of 628	1668	309a5f9f926b2fa365a94cbf98214566.exe	cmd.exe
PID 1668 wrote to memory of 628	1668	309a5f9f926b2fa365a94cbf98214566.exe	cmd.exe
PID 628 wrote to memory of 1772	628	cmd.exe	reg.exe
PID 628 wrote to memory of 1772	628	cmd.exe	reg.exe
PID 628 wrote to memory of 1772	628	cmd.exe	reg.exe
PID 628 wrote to memory of 1772	628	cmd.exe	reg.exe
PID 1668 wrote to memory of 1700	1668	309a5f9f926b2fa365a94cbf98214566.exe	mcsft.exe
PID 1668 wrote to memory of 1700	1668	309a5f9f926b2fa365a94cbf98214566.exe	mcsft.exe
PID 1668 wrote to memory of 1700	1668	309a5f9f926b2fa365a94cbf98214566.exe	mcsft.exe
PID 1668 wrote to memory of 1700	1668	309a5f9f926b2fa365a94cbf98214566.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe
PID 1700 wrote to memory of 1360	1700	mcsft.exe	mcsft.exe

C:\Users\Admin\AppData\Local\Temp\309a5f9f926b2fa365a94cbf98214566.exe
"C:\Users\Admin\AppData\Local\Temp\309a5f9f926b2fa365a94cbf98214566.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1668

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\QhRVz.bat" "
2⤵
- Suspicious use of WriteProcessMemory
PID:628

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:1772

C:\Users\Admin\AppData\Roaming\mcsft.exe
"C:\Users\Admin\AppData\Roaming\mcsft.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1700

C:\Users\Admin\AppData\Roaming\mcsft.exe
C:\Users\Admin\AppData\Roaming\mcsft.exe
3⤵
- Executes dropped EXE
- Checks BIOS information in registry
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1360

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\QhRVz.bat
MD5
a5feca573884d76f559b996d45e8ad9a

SHA1
0e81a993f3af4e31d60653dc2513186f0495f1c8

SHA256
c98e20d46d6465febb5d29cfab51241521ea5d6cd621f5e18b9b7d6fbfac3f0f

SHA512
a9239648b5f15eac4d4151b6e1bdc81065eeaeb101404c2a0126f03bc87f1e6a57206bfa07a44379e9d3bba889e4497a9991ff41fb109099b01512df3dc3cbda

Download Submit
C:\Users\Admin\AppData\Roaming\mcsft.exe
MD5
c2d08824a8aeffc72399811086781d0a

SHA1
44393b8ec11b5d2d0cf9fdb569a8acd11e5dafa4

SHA256
8364bc726377bf03fb9c9a88682df0ffa0bd244a05ca1c816471c6ff053afae6

SHA512
b8eded84bf06c82c8ccd203094aa802cba03f9d9b4a7e46c8d7442948f1dc00728b9d2b8e70fdfb40ed3d8ad90f1f8b2005513ae3cd1025a687538e95ddc7777

Download Submit
C:\Users\Admin\AppData\Roaming\mcsft.exe
MD5
c2d08824a8aeffc72399811086781d0a

SHA1
44393b8ec11b5d2d0cf9fdb569a8acd11e5dafa4

SHA256
8364bc726377bf03fb9c9a88682df0ffa0bd244a05ca1c816471c6ff053afae6

SHA512
b8eded84bf06c82c8ccd203094aa802cba03f9d9b4a7e46c8d7442948f1dc00728b9d2b8e70fdfb40ed3d8ad90f1f8b2005513ae3cd1025a687538e95ddc7777

Download Submit
C:\Users\Admin\AppData\Roaming\mcsft.exe
MD5
c2d08824a8aeffc72399811086781d0a

SHA1
44393b8ec11b5d2d0cf9fdb569a8acd11e5dafa4

SHA256
8364bc726377bf03fb9c9a88682df0ffa0bd244a05ca1c816471c6ff053afae6

SHA512
b8eded84bf06c82c8ccd203094aa802cba03f9d9b4a7e46c8d7442948f1dc00728b9d2b8e70fdfb40ed3d8ad90f1f8b2005513ae3cd1025a687538e95ddc7777

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
c2d08824a8aeffc72399811086781d0a

SHA1
44393b8ec11b5d2d0cf9fdb569a8acd11e5dafa4

SHA256
8364bc726377bf03fb9c9a88682df0ffa0bd244a05ca1c816471c6ff053afae6

SHA512
b8eded84bf06c82c8ccd203094aa802cba03f9d9b4a7e46c8d7442948f1dc00728b9d2b8e70fdfb40ed3d8ad90f1f8b2005513ae3cd1025a687538e95ddc7777

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
c2d08824a8aeffc72399811086781d0a

SHA1
44393b8ec11b5d2d0cf9fdb569a8acd11e5dafa4

SHA256
8364bc726377bf03fb9c9a88682df0ffa0bd244a05ca1c816471c6ff053afae6

SHA512
b8eded84bf06c82c8ccd203094aa802cba03f9d9b4a7e46c8d7442948f1dc00728b9d2b8e70fdfb40ed3d8ad90f1f8b2005513ae3cd1025a687538e95ddc7777

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
c2d08824a8aeffc72399811086781d0a

SHA1
44393b8ec11b5d2d0cf9fdb569a8acd11e5dafa4

SHA256
8364bc726377bf03fb9c9a88682df0ffa0bd244a05ca1c816471c6ff053afae6

SHA512
b8eded84bf06c82c8ccd203094aa802cba03f9d9b4a7e46c8d7442948f1dc00728b9d2b8e70fdfb40ed3d8ad90f1f8b2005513ae3cd1025a687538e95ddc7777

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
c2d08824a8aeffc72399811086781d0a

SHA1
44393b8ec11b5d2d0cf9fdb569a8acd11e5dafa4

SHA256
8364bc726377bf03fb9c9a88682df0ffa0bd244a05ca1c816471c6ff053afae6

SHA512
b8eded84bf06c82c8ccd203094aa802cba03f9d9b4a7e46c8d7442948f1dc00728b9d2b8e70fdfb40ed3d8ad90f1f8b2005513ae3cd1025a687538e95ddc7777

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
c2d08824a8aeffc72399811086781d0a

SHA1
44393b8ec11b5d2d0cf9fdb569a8acd11e5dafa4

SHA256
8364bc726377bf03fb9c9a88682df0ffa0bd244a05ca1c816471c6ff053afae6

SHA512
b8eded84bf06c82c8ccd203094aa802cba03f9d9b4a7e46c8d7442948f1dc00728b9d2b8e70fdfb40ed3d8ad90f1f8b2005513ae3cd1025a687538e95ddc7777

Download Submit
memory/628-2-0x0000000000000000-mapping.dmp

Download
memory/1360-16-0x00000000004B3320-mapping.dmp

Download
memory/1360-15-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1360-18-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1360-19-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1700-10-0x0000000000000000-mapping.dmp

Download
memory/1772-4-0x0000000000000000-mapping.dmp

Download