darkcomet | 94c3f397f31b5cc0873ba528bffc2ba819c0ed2b438da708c76be809ff5146b9

Analysis

max time kernel
151s
max time network
163s
platform
windows7_x64
resource
win7-20220414-en
submitted
20-05-2022 03:43

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General

Target

Result.jpg.exe
Size

1.2MB
MD5

da81c76543b3f280abfaf1c04a820c8d
SHA1

e746372c52ab53a7dcded6ffd497f10d3b84bda9
SHA256

996d745b0948add2ef943870d637afb46d4463432df4cb766509ecaa1982a35a
SHA512

8fe78aee184022b8a15646d1a847aed29e3bf463599d5b8b517a321cc876f53ebb170b03ccdddb2032a6ab420956bfd233c489e954044a93a4c7995ed41b3346

Score

10^/10

darkcomet 1 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

sadist.ddns.net:500

Mutex

DC_MUTEX-WDGJLC3

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
bg0tFwB3BTiD
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

1.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	1.exe

Modifies firewall policy service 2 TTPs 6 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

msdcsc.exeiexplore.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	msdcsc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	iexplore.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	iexplore.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	iexplore.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	msdcsc.exe

Executes dropped EXE 2 IoCs

Processes:

1.exemsdcsc.exe

pid process

1064 1.exe
648 msdcsc.exe
Sets file to hidden 1 TTPs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158
Loads dropped DLL 4 IoCs

Processes:

Result.jpg.exe1.exe

pid process

1748 Result.jpg.exe
1748 Result.jpg.exe
1064 1.exe
1064 1.exe

pid	process
1064	1.exe
648	msdcsc.exe

pid	process
1748	Result.jpg.exe
1748	Result.jpg.exe
1064	1.exe
1064	1.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

1.exemsdcsc.exeiexplore.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	msdcsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

msdcsc.exe

description pid process target process

PID 648 set thread context of 1056 648 msdcsc.exe iexplore.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 648 set thread context of 1056	648	msdcsc.exe	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

1.exemsdcsc.exeiexplore.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1064	1.exe
Token: SeSecurityPrivilege	1064	1.exe
Token: SeTakeOwnershipPrivilege	1064	1.exe
Token: SeLoadDriverPrivilege	1064	1.exe
Token: SeSystemProfilePrivilege	1064	1.exe
Token: SeSystemtimePrivilege	1064	1.exe
Token: SeProfSingleProcessPrivilege	1064	1.exe
Token: SeIncBasePriorityPrivilege	1064	1.exe
Token: SeCreatePagefilePrivilege	1064	1.exe
Token: SeBackupPrivilege	1064	1.exe
Token: SeRestorePrivilege	1064	1.exe
Token: SeShutdownPrivilege	1064	1.exe
Token: SeDebugPrivilege	1064	1.exe
Token: SeSystemEnvironmentPrivilege	1064	1.exe
Token: SeChangeNotifyPrivilege	1064	1.exe
Token: SeRemoteShutdownPrivilege	1064	1.exe
Token: SeUndockPrivilege	1064	1.exe
Token: SeManageVolumePrivilege	1064	1.exe
Token: SeImpersonatePrivilege	1064	1.exe
Token: SeCreateGlobalPrivilege	1064	1.exe
Token: 33	1064	1.exe
Token: 34	1064	1.exe
Token: 35	1064	1.exe
Token: SeIncreaseQuotaPrivilege	648	msdcsc.exe
Token: SeSecurityPrivilege	648	msdcsc.exe
Token: SeTakeOwnershipPrivilege	648	msdcsc.exe
Token: SeLoadDriverPrivilege	648	msdcsc.exe
Token: SeSystemProfilePrivilege	648	msdcsc.exe
Token: SeSystemtimePrivilege	648	msdcsc.exe
Token: SeProfSingleProcessPrivilege	648	msdcsc.exe
Token: SeIncBasePriorityPrivilege	648	msdcsc.exe
Token: SeCreatePagefilePrivilege	648	msdcsc.exe
Token: SeBackupPrivilege	648	msdcsc.exe
Token: SeRestorePrivilege	648	msdcsc.exe
Token: SeShutdownPrivilege	648	msdcsc.exe
Token: SeDebugPrivilege	648	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	648	msdcsc.exe
Token: SeChangeNotifyPrivilege	648	msdcsc.exe
Token: SeRemoteShutdownPrivilege	648	msdcsc.exe
Token: SeUndockPrivilege	648	msdcsc.exe
Token: SeManageVolumePrivilege	648	msdcsc.exe
Token: SeImpersonatePrivilege	648	msdcsc.exe
Token: SeCreateGlobalPrivilege	648	msdcsc.exe
Token: 33	648	msdcsc.exe
Token: 34	648	msdcsc.exe
Token: 35	648	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	1056	iexplore.exe
Token: SeSecurityPrivilege	1056	iexplore.exe
Token: SeTakeOwnershipPrivilege	1056	iexplore.exe
Token: SeLoadDriverPrivilege	1056	iexplore.exe
Token: SeSystemProfilePrivilege	1056	iexplore.exe
Token: SeSystemtimePrivilege	1056	iexplore.exe
Token: SeProfSingleProcessPrivilege	1056	iexplore.exe
Token: SeIncBasePriorityPrivilege	1056	iexplore.exe
Token: SeCreatePagefilePrivilege	1056	iexplore.exe
Token: SeBackupPrivilege	1056	iexplore.exe
Token: SeRestorePrivilege	1056	iexplore.exe
Token: SeShutdownPrivilege	1056	iexplore.exe
Token: SeDebugPrivilege	1056	iexplore.exe
Token: SeSystemEnvironmentPrivilege	1056	iexplore.exe
Token: SeChangeNotifyPrivilege	1056	iexplore.exe
Token: SeRemoteShutdownPrivilege	1056	iexplore.exe
Token: SeUndockPrivilege	1056	iexplore.exe
Token: SeManageVolumePrivilege	1056	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

DllHost.exe

pid process

924 DllHost.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid process

1056 iexplore.exe

pid	process
924	DllHost.exe

pid	process
1056	iexplore.exe

Suspicious use of WriteProcessMemory 48 IoCs

Processes:

Result.jpg.exe1.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 1748 wrote to memory of 1064	1748	Result.jpg.exe	1.exe
PID 1748 wrote to memory of 1064	1748	Result.jpg.exe	1.exe
PID 1748 wrote to memory of 1064	1748	Result.jpg.exe	1.exe
PID 1748 wrote to memory of 1064	1748	Result.jpg.exe	1.exe
PID 1064 wrote to memory of 696	1064	1.exe	cmd.exe
PID 1064 wrote to memory of 696	1064	1.exe	cmd.exe
PID 1064 wrote to memory of 696	1064	1.exe	cmd.exe
PID 1064 wrote to memory of 696	1064	1.exe	cmd.exe
PID 1064 wrote to memory of 1732	1064	1.exe	cmd.exe
PID 1064 wrote to memory of 1732	1064	1.exe	cmd.exe
PID 1064 wrote to memory of 1732	1064	1.exe	cmd.exe
PID 1064 wrote to memory of 1732	1064	1.exe	cmd.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 1064 wrote to memory of 440	1064	1.exe	notepad.exe
PID 696 wrote to memory of 1832	696	cmd.exe	attrib.exe
PID 696 wrote to memory of 1832	696	cmd.exe	attrib.exe
PID 696 wrote to memory of 1832	696	cmd.exe	attrib.exe
PID 696 wrote to memory of 1832	696	cmd.exe	attrib.exe
PID 1732 wrote to memory of 1376	1732	cmd.exe	attrib.exe
PID 1732 wrote to memory of 1376	1732	cmd.exe	attrib.exe
PID 1732 wrote to memory of 1376	1732	cmd.exe	attrib.exe
PID 1732 wrote to memory of 1376	1732	cmd.exe	attrib.exe
PID 1064 wrote to memory of 648	1064	1.exe	msdcsc.exe
PID 1064 wrote to memory of 648	1064	1.exe	msdcsc.exe
PID 1064 wrote to memory of 648	1064	1.exe	msdcsc.exe
PID 1064 wrote to memory of 648	1064	1.exe	msdcsc.exe
PID 648 wrote to memory of 1056	648	msdcsc.exe	iexplore.exe
PID 648 wrote to memory of 1056	648	msdcsc.exe	iexplore.exe
PID 648 wrote to memory of 1056	648	msdcsc.exe	iexplore.exe
PID 648 wrote to memory of 1056	648	msdcsc.exe	iexplore.exe
PID 648 wrote to memory of 1056	648	msdcsc.exe	iexplore.exe
PID 648 wrote to memory of 1056	648	msdcsc.exe	iexplore.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

1832 attrib.exe
1376 attrib.exe

pid	process
1832	attrib.exe
1376	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Result.jpg.exe
"C:\Users\Admin\AppData\Local\Temp\Result.jpg.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1748

C:\Users\Admin\AppData\Local\Temp\1.exe
"C:\Users\Admin\AppData\Local\Temp\1.exe"
2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1064

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\1.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:696

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\1.exe" +s +h
4⤵
- Views/modifies file attributes
PID:1832

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:1732

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
4⤵
- Views/modifies file attributes
PID:1376

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:440

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Modifies firewall policy service
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:648

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
4⤵
- Modifies firewall policy service
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1056

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:924

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Modify Existing Service

T1031

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Hidden Files and Directories

T1158

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\1.exe
Filesize
658KB

MD5
fbb4270367abd1e26b0a72f302b263cf

SHA1
d68d73d6eec4ab2b086babcbaeff0a85fb487067

SHA256
f06eb9383ca282824c0fa3172b4d404de4a03c1eea2ee74aeaf022514255743b

SHA512
73bc3fbe0efa3040751ccc1396362a60136e6b864862eb0682d1d1e29d7c89012f61e98ddaf102580f075315f3959997210e5c56ba34dec483b139eac8639ef9

Download Submit
C:\Users\Admin\AppData\Local\Temp\1.exe
Filesize
658KB

MD5
fbb4270367abd1e26b0a72f302b263cf

SHA1
d68d73d6eec4ab2b086babcbaeff0a85fb487067

SHA256
f06eb9383ca282824c0fa3172b4d404de4a03c1eea2ee74aeaf022514255743b

SHA512
73bc3fbe0efa3040751ccc1396362a60136e6b864862eb0682d1d1e29d7c89012f61e98ddaf102580f075315f3959997210e5c56ba34dec483b139eac8639ef9

Download Submit
C:\Users\Admin\AppData\Local\Temp\1574605225_22.ico.jpg
Filesize
533KB

MD5
ac7a4fccf9ab574e25354c7a7cc867b5

SHA1
52ca4149c29f52b9b387303b112e4a6a4392ad8c

SHA256
4e660bd705f186e365162329262e7375b5d06b01777286be8eb0e5a9c48786ca

SHA512
82beb0be72bf9daceb4f03306ad61e7959332544610370d3457e8c4951cc76942679bdcaa6f0c2ae67a2a40682a4fb187739513396e36f418ae45afc699ef195

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
658KB

MD5
fbb4270367abd1e26b0a72f302b263cf

SHA1
d68d73d6eec4ab2b086babcbaeff0a85fb487067

SHA256
f06eb9383ca282824c0fa3172b4d404de4a03c1eea2ee74aeaf022514255743b

SHA512
73bc3fbe0efa3040751ccc1396362a60136e6b864862eb0682d1d1e29d7c89012f61e98ddaf102580f075315f3959997210e5c56ba34dec483b139eac8639ef9

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
658KB

MD5
fbb4270367abd1e26b0a72f302b263cf

SHA1
d68d73d6eec4ab2b086babcbaeff0a85fb487067

SHA256
f06eb9383ca282824c0fa3172b4d404de4a03c1eea2ee74aeaf022514255743b

SHA512
73bc3fbe0efa3040751ccc1396362a60136e6b864862eb0682d1d1e29d7c89012f61e98ddaf102580f075315f3959997210e5c56ba34dec483b139eac8639ef9

Download Submit
\Users\Admin\AppData\Local\Temp\1.exe
Filesize
658KB

MD5
fbb4270367abd1e26b0a72f302b263cf

SHA1
d68d73d6eec4ab2b086babcbaeff0a85fb487067

SHA256
f06eb9383ca282824c0fa3172b4d404de4a03c1eea2ee74aeaf022514255743b

SHA512
73bc3fbe0efa3040751ccc1396362a60136e6b864862eb0682d1d1e29d7c89012f61e98ddaf102580f075315f3959997210e5c56ba34dec483b139eac8639ef9

Download Submit
\Users\Admin\AppData\Local\Temp\1.exe
Filesize
658KB

MD5
fbb4270367abd1e26b0a72f302b263cf

SHA1
d68d73d6eec4ab2b086babcbaeff0a85fb487067

SHA256
f06eb9383ca282824c0fa3172b4d404de4a03c1eea2ee74aeaf022514255743b

SHA512
73bc3fbe0efa3040751ccc1396362a60136e6b864862eb0682d1d1e29d7c89012f61e98ddaf102580f075315f3959997210e5c56ba34dec483b139eac8639ef9

Download Submit
\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
658KB

MD5
fbb4270367abd1e26b0a72f302b263cf

SHA1
d68d73d6eec4ab2b086babcbaeff0a85fb487067

SHA256
f06eb9383ca282824c0fa3172b4d404de4a03c1eea2ee74aeaf022514255743b

SHA512
73bc3fbe0efa3040751ccc1396362a60136e6b864862eb0682d1d1e29d7c89012f61e98ddaf102580f075315f3959997210e5c56ba34dec483b139eac8639ef9

Download Submit
\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
658KB

MD5
fbb4270367abd1e26b0a72f302b263cf

SHA1
d68d73d6eec4ab2b086babcbaeff0a85fb487067

SHA256
f06eb9383ca282824c0fa3172b4d404de4a03c1eea2ee74aeaf022514255743b

SHA512
73bc3fbe0efa3040751ccc1396362a60136e6b864862eb0682d1d1e29d7c89012f61e98ddaf102580f075315f3959997210e5c56ba34dec483b139eac8639ef9

Download Submit
memory/440-64-0x0000000000000000-mapping.dmp

Download
memory/648-70-0x0000000000000000-mapping.dmp

Download
memory/696-62-0x0000000000000000-mapping.dmp

Download
memory/1064-58-0x0000000000000000-mapping.dmp

Download
memory/1376-67-0x0000000000000000-mapping.dmp

Download
memory/1732-63-0x0000000000000000-mapping.dmp

Download
memory/1748-54-0x0000000075761000-0x0000000075763000-memory.dmp

Filesize
8KB

Download
memory/1832-66-0x0000000000000000-mapping.dmp

Download