darkcomet | e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66

Analysis

max time kernel
136s
max time network
146s
platform
windows7_x64
resource
win7v20201028
submitted
13-11-2020 15:48

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General

Target

e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe
Size

559KB
MD5

c55c34449fd71a2a2ebd9fa8d9d3c279
SHA1

bf04419202022f6b226d0769fca952a7b1b94ca2
SHA256

e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66
SHA512

1923e4024a37fcee70661532c111e82a444d75d34447515f91ddc8064431193a4eb9f2bb625d7cc5d04f05ccbd6a510ffc82bb0a94478060f6f28abcbc87b927

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

1760 mcsft.exe
1328 mcsft.exe

pid	process
1760	mcsft.exe
1328	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/1328-15-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
C:\Users\Admin\AppData\Roaming\mcsft.exe	upx
behavioral1/memory/1328-18-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1328-19-0x0000000000400000-0x00000000004B5000-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:

e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe

pid	process
1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe
1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe
1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe
1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe
1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.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
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\Mcrosoft = "C:\\Users\\Admin\\AppData\\Roaming\\mcsft.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

mcsft.exe

description pid process target process

PID 1760 set thread context of 1328 1760 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 1760 set thread context of 1328	1760	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	1328	mcsft.exe
Token: SeSecurityPrivilege	1328	mcsft.exe
Token: SeTakeOwnershipPrivilege	1328	mcsft.exe
Token: SeLoadDriverPrivilege	1328	mcsft.exe
Token: SeSystemProfilePrivilege	1328	mcsft.exe
Token: SeSystemtimePrivilege	1328	mcsft.exe
Token: SeProfSingleProcessPrivilege	1328	mcsft.exe
Token: SeIncBasePriorityPrivilege	1328	mcsft.exe
Token: SeCreatePagefilePrivilege	1328	mcsft.exe
Token: SeBackupPrivilege	1328	mcsft.exe
Token: SeRestorePrivilege	1328	mcsft.exe
Token: SeShutdownPrivilege	1328	mcsft.exe
Token: SeDebugPrivilege	1328	mcsft.exe
Token: SeSystemEnvironmentPrivilege	1328	mcsft.exe
Token: SeChangeNotifyPrivilege	1328	mcsft.exe
Token: SeRemoteShutdownPrivilege	1328	mcsft.exe
Token: SeUndockPrivilege	1328	mcsft.exe
Token: SeManageVolumePrivilege	1328	mcsft.exe
Token: SeImpersonatePrivilege	1328	mcsft.exe
Token: SeCreateGlobalPrivilege	1328	mcsft.exe
Token: 33	1328	mcsft.exe
Token: 34	1328	mcsft.exe
Token: 35	1328	mcsft.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exemcsft.exemcsft.exe

pid process

1204 e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe
1760 mcsft.exe
1328 mcsft.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.execmd.exemcsft.exe

description	pid	process	target process
PID 1204 wrote to memory of 1968	1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe	cmd.exe
PID 1204 wrote to memory of 1968	1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe	cmd.exe
PID 1204 wrote to memory of 1968	1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe	cmd.exe
PID 1204 wrote to memory of 1968	1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe	cmd.exe
PID 1968 wrote to memory of 1348	1968	cmd.exe	reg.exe
PID 1968 wrote to memory of 1348	1968	cmd.exe	reg.exe
PID 1968 wrote to memory of 1348	1968	cmd.exe	reg.exe
PID 1968 wrote to memory of 1348	1968	cmd.exe	reg.exe
PID 1204 wrote to memory of 1760	1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe	mcsft.exe
PID 1204 wrote to memory of 1760	1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe	mcsft.exe
PID 1204 wrote to memory of 1760	1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe	mcsft.exe
PID 1204 wrote to memory of 1760	1204	e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe
PID 1760 wrote to memory of 1328	1760	mcsft.exe	mcsft.exe

C:\Users\Admin\AppData\Local\Temp\e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe
"C:\Users\Admin\AppData\Local\Temp\e9d3a58d421ecd9c8c57f7220c4ee420e52bf449194d35b367aa45c863bd0f66.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1204

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\rBFtB.bat" "
2⤵
- Suspicious use of WriteProcessMemory
PID:1968

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:1348

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:1760

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:1328

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\rBFtB.bat
MD5
a5feca573884d76f559b996d45e8ad9a

SHA1
0e81a993f3af4e31d60653dc2513186f0495f1c8

SHA256
c98e20d46d6465febb5d29cfab51241521ea5d6cd621f5e18b9b7d6fbfac3f0f

SHA512
a9239648b5f15eac4d4151b6e1bdc81065eeaeb101404c2a0126f03bc87f1e6a57206bfa07a44379e9d3bba889e4497a9991ff41fb109099b01512df3dc3cbda

Download Submit
C:\Users\Admin\AppData\Roaming\mcsft.exe
MD5
5c08f4134796571fa8cc57a8d786229e

SHA1
d5859b25105c230981b36caefcb4ee9c00997049

SHA256
a3978d3815eceede91c52e4f572e1b47759435e489d1b81ce0534e038eb802b7

SHA512
8592801f4aeb22ab3af9518475be2824d210598bb0accd2081724687ef8fe085eb55132f7806a0a758c2964493c5929e0ca7666a5224461e56e74ae3059ab0e0

Download Submit
C:\Users\Admin\AppData\Roaming\mcsft.exe
MD5
5c08f4134796571fa8cc57a8d786229e

SHA1
d5859b25105c230981b36caefcb4ee9c00997049

SHA256
a3978d3815eceede91c52e4f572e1b47759435e489d1b81ce0534e038eb802b7

SHA512
8592801f4aeb22ab3af9518475be2824d210598bb0accd2081724687ef8fe085eb55132f7806a0a758c2964493c5929e0ca7666a5224461e56e74ae3059ab0e0

Download Submit
C:\Users\Admin\AppData\Roaming\mcsft.exe
MD5
5c08f4134796571fa8cc57a8d786229e

SHA1
d5859b25105c230981b36caefcb4ee9c00997049

SHA256
a3978d3815eceede91c52e4f572e1b47759435e489d1b81ce0534e038eb802b7

SHA512
8592801f4aeb22ab3af9518475be2824d210598bb0accd2081724687ef8fe085eb55132f7806a0a758c2964493c5929e0ca7666a5224461e56e74ae3059ab0e0

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
5c08f4134796571fa8cc57a8d786229e

SHA1
d5859b25105c230981b36caefcb4ee9c00997049

SHA256
a3978d3815eceede91c52e4f572e1b47759435e489d1b81ce0534e038eb802b7

SHA512
8592801f4aeb22ab3af9518475be2824d210598bb0accd2081724687ef8fe085eb55132f7806a0a758c2964493c5929e0ca7666a5224461e56e74ae3059ab0e0

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
5c08f4134796571fa8cc57a8d786229e

SHA1
d5859b25105c230981b36caefcb4ee9c00997049

SHA256
a3978d3815eceede91c52e4f572e1b47759435e489d1b81ce0534e038eb802b7

SHA512
8592801f4aeb22ab3af9518475be2824d210598bb0accd2081724687ef8fe085eb55132f7806a0a758c2964493c5929e0ca7666a5224461e56e74ae3059ab0e0

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
5c08f4134796571fa8cc57a8d786229e

SHA1
d5859b25105c230981b36caefcb4ee9c00997049

SHA256
a3978d3815eceede91c52e4f572e1b47759435e489d1b81ce0534e038eb802b7

SHA512
8592801f4aeb22ab3af9518475be2824d210598bb0accd2081724687ef8fe085eb55132f7806a0a758c2964493c5929e0ca7666a5224461e56e74ae3059ab0e0

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
5c08f4134796571fa8cc57a8d786229e

SHA1
d5859b25105c230981b36caefcb4ee9c00997049

SHA256
a3978d3815eceede91c52e4f572e1b47759435e489d1b81ce0534e038eb802b7

SHA512
8592801f4aeb22ab3af9518475be2824d210598bb0accd2081724687ef8fe085eb55132f7806a0a758c2964493c5929e0ca7666a5224461e56e74ae3059ab0e0

Download Submit
\Users\Admin\AppData\Roaming\mcsft.exe
MD5
5c08f4134796571fa8cc57a8d786229e

SHA1
d5859b25105c230981b36caefcb4ee9c00997049

SHA256
a3978d3815eceede91c52e4f572e1b47759435e489d1b81ce0534e038eb802b7

SHA512
8592801f4aeb22ab3af9518475be2824d210598bb0accd2081724687ef8fe085eb55132f7806a0a758c2964493c5929e0ca7666a5224461e56e74ae3059ab0e0

Download Submit
memory/1328-15-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1328-16-0x00000000004B3320-mapping.dmp

Download
memory/1328-18-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1328-19-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1348-4-0x0000000000000000-mapping.dmp

Download
memory/1760-10-0x0000000000000000-mapping.dmp

Download
memory/1968-2-0x0000000000000000-mapping.dmp

Download