darkcomet | 46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768

General

Target

46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe
Size

892KB
MD5

c3ef33d077f1471aabf89c3042b0e54a
SHA1

ec312ee6026b175c5a73b61b04da1f710fc55a4e
SHA256

46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768
SHA512

b3e7f023f8ab2d48a2c9f2dd906d44ebd4e61055b8519f0a722985dfd3fcfc90bf3795eead0fc999e692f0a3fa6fee46697e26ed93166a4e0b267deddaccb071

Score

10^/10

darkcomet sazan evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Sazan

C2

ffhjfgkjdfg.tk:45622

Mutex

DC_MUTEX-CAQ9PVQ

Attributes

InstallPath
SYS\Syscal.exe
gencode
qsfrz9ZVMWyN
install
true
offline_keylogger
true
persistence
true
reg_key
SystemCalculator

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:

d.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\SYS\\Syscal.exe"	d.exe

Executes dropped EXE 2 IoCs

Processes:

d.exeSyscal.exe

pid process

268 d.exe
1152 Syscal.exe
Sets file to hidden 1 TTPs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

pid	process
268	d.exe
1152	Syscal.exe

Loads dropped DLL 4 IoCs

Processes:

46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exed.exe

pid	process
960	46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe
960	46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe
268	d.exe
268	d.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

d.exeSyscal.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1405931862-909307831-4085185274-1000\Software\Microsoft\Windows\CurrentVersion\Run\SystemCalculator = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\SYS\\Syscal.exe"	d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1405931862-909307831-4085185274-1000\Software\Microsoft\Windows\CurrentVersion\Run\SystemCalculator = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\SYS\\Syscal.exe"	Syscal.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

1676 1056 WerFault.exe notepad.exe
1612 1964 WerFault.exe notepad.exe

pid	pid_target	process	target process
1676	1056	WerFault.exe	notepad.exe
1612	1964	WerFault.exe	notepad.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

d.exeSyscal.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	268	d.exe
Token: SeSecurityPrivilege	268	d.exe
Token: SeTakeOwnershipPrivilege	268	d.exe
Token: SeLoadDriverPrivilege	268	d.exe
Token: SeSystemProfilePrivilege	268	d.exe
Token: SeSystemtimePrivilege	268	d.exe
Token: SeProfSingleProcessPrivilege	268	d.exe
Token: SeIncBasePriorityPrivilege	268	d.exe
Token: SeCreatePagefilePrivilege	268	d.exe
Token: SeBackupPrivilege	268	d.exe
Token: SeRestorePrivilege	268	d.exe
Token: SeShutdownPrivilege	268	d.exe
Token: SeDebugPrivilege	268	d.exe
Token: SeSystemEnvironmentPrivilege	268	d.exe
Token: SeChangeNotifyPrivilege	268	d.exe
Token: SeRemoteShutdownPrivilege	268	d.exe
Token: SeUndockPrivilege	268	d.exe
Token: SeManageVolumePrivilege	268	d.exe
Token: SeImpersonatePrivilege	268	d.exe
Token: SeCreateGlobalPrivilege	268	d.exe
Token: 33	268	d.exe
Token: 34	268	d.exe
Token: 35	268	d.exe
Token: SeIncreaseQuotaPrivilege	1152	Syscal.exe
Token: SeSecurityPrivilege	1152	Syscal.exe
Token: SeTakeOwnershipPrivilege	1152	Syscal.exe
Token: SeLoadDriverPrivilege	1152	Syscal.exe
Token: SeSystemProfilePrivilege	1152	Syscal.exe
Token: SeSystemtimePrivilege	1152	Syscal.exe
Token: SeProfSingleProcessPrivilege	1152	Syscal.exe
Token: SeIncBasePriorityPrivilege	1152	Syscal.exe
Token: SeCreatePagefilePrivilege	1152	Syscal.exe
Token: SeBackupPrivilege	1152	Syscal.exe
Token: SeRestorePrivilege	1152	Syscal.exe
Token: SeShutdownPrivilege	1152	Syscal.exe
Token: SeDebugPrivilege	1152	Syscal.exe
Token: SeSystemEnvironmentPrivilege	1152	Syscal.exe
Token: SeChangeNotifyPrivilege	1152	Syscal.exe
Token: SeRemoteShutdownPrivilege	1152	Syscal.exe
Token: SeUndockPrivilege	1152	Syscal.exe
Token: SeManageVolumePrivilege	1152	Syscal.exe
Token: SeImpersonatePrivilege	1152	Syscal.exe
Token: SeCreateGlobalPrivilege	1152	Syscal.exe
Token: 33	1152	Syscal.exe
Token: 34	1152	Syscal.exe
Token: 35	1152	Syscal.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Syscal.exe

pid process

1152 Syscal.exe

pid	process
1152	Syscal.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exed.execmd.execmd.exenotepad.exeSyscal.exe

description	pid	process	target process
PID 960 wrote to memory of 268	960	46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe	d.exe
PID 960 wrote to memory of 268	960	46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe	d.exe
PID 960 wrote to memory of 268	960	46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe	d.exe
PID 960 wrote to memory of 268	960	46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe	d.exe
PID 268 wrote to memory of 544	268	d.exe	cmd.exe
PID 268 wrote to memory of 544	268	d.exe	cmd.exe
PID 268 wrote to memory of 544	268	d.exe	cmd.exe
PID 268 wrote to memory of 544	268	d.exe	cmd.exe
PID 268 wrote to memory of 1540	268	d.exe	cmd.exe
PID 268 wrote to memory of 1540	268	d.exe	cmd.exe
PID 268 wrote to memory of 1540	268	d.exe	cmd.exe
PID 268 wrote to memory of 1540	268	d.exe	cmd.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 544 wrote to memory of 1912	544	cmd.exe	attrib.exe
PID 544 wrote to memory of 1912	544	cmd.exe	attrib.exe
PID 544 wrote to memory of 1912	544	cmd.exe	attrib.exe
PID 544 wrote to memory of 1912	544	cmd.exe	attrib.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 1540 wrote to memory of 1244	1540	cmd.exe	attrib.exe
PID 1540 wrote to memory of 1244	1540	cmd.exe	attrib.exe
PID 1540 wrote to memory of 1244	1540	cmd.exe	attrib.exe
PID 1540 wrote to memory of 1244	1540	cmd.exe	attrib.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 268 wrote to memory of 1056	268	d.exe	notepad.exe
PID 1056 wrote to memory of 1676	1056	notepad.exe	WerFault.exe
PID 1056 wrote to memory of 1676	1056	notepad.exe	WerFault.exe
PID 1056 wrote to memory of 1676	1056	notepad.exe	WerFault.exe
PID 1056 wrote to memory of 1676	1056	notepad.exe	WerFault.exe
PID 268 wrote to memory of 1152	268	d.exe	Syscal.exe
PID 268 wrote to memory of 1152	268	d.exe	Syscal.exe
PID 268 wrote to memory of 1152	268	d.exe	Syscal.exe
PID 268 wrote to memory of 1152	268	d.exe	Syscal.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe
PID 1152 wrote to memory of 1964	1152	Syscal.exe	notepad.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

1244 attrib.exe
1912 attrib.exe

pid	process
1244	attrib.exe
1912	attrib.exe

C:\Users\Admin\AppData\Local\Temp\46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe
"C:\Users\Admin\AppData\Local\Temp\46b6eca723ff6847d9ca7faa01668a7a4099fd84996f7b0172138f965e510768.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:960

C:\Users\Admin\AppData\Local\Temp\d.exe
"C:\Users\Admin\AppData\Local\Temp\d.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:268

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\d.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:544

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\d.exe" +s +h
4⤵
- Views/modifies file attributes
PID:1912

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:1540

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
4⤵
- Views/modifies file attributes
PID:1244

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
- Suspicious use of WriteProcessMemory
PID:1056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1056 -s 264
4⤵
- Program crash
PID:1676

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\SYS\Syscal.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\SYS\Syscal.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1152

C:\Windows\SysWOW64\notepad.exe
notepad
4⤵
PID:1964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1964 -s 220
5⤵
- Program crash
PID:1612

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Hidden Files and Directories

2

T1158

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\d.exe
MD5
86ce2843c1f4a5f4585ceee1eb68d2e4

SHA1
7b3480b5c72accee0839d476ef2979c4c4755aea

SHA256
1af6703a93d8901ac9342797b59ebe03118ea89276f31737b79e8e15ba7fa58f

SHA512
133be13ca504fd760dceacd393c280243dbbe52d63e3bd65f79760b21ed3eff45ad6856a799774c399c18a02a32abd94622db31eb2cf72747e69a26a1b7f31a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\d.exe
MD5
86ce2843c1f4a5f4585ceee1eb68d2e4

SHA1
7b3480b5c72accee0839d476ef2979c4c4755aea

SHA256
1af6703a93d8901ac9342797b59ebe03118ea89276f31737b79e8e15ba7fa58f

SHA512
133be13ca504fd760dceacd393c280243dbbe52d63e3bd65f79760b21ed3eff45ad6856a799774c399c18a02a32abd94622db31eb2cf72747e69a26a1b7f31a1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\SYS\Syscal.exe
MD5
86ce2843c1f4a5f4585ceee1eb68d2e4

SHA1
7b3480b5c72accee0839d476ef2979c4c4755aea

SHA256
1af6703a93d8901ac9342797b59ebe03118ea89276f31737b79e8e15ba7fa58f

SHA512
133be13ca504fd760dceacd393c280243dbbe52d63e3bd65f79760b21ed3eff45ad6856a799774c399c18a02a32abd94622db31eb2cf72747e69a26a1b7f31a1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\SYS\Syscal.exe
MD5
86ce2843c1f4a5f4585ceee1eb68d2e4

SHA1
7b3480b5c72accee0839d476ef2979c4c4755aea

SHA256
1af6703a93d8901ac9342797b59ebe03118ea89276f31737b79e8e15ba7fa58f

SHA512
133be13ca504fd760dceacd393c280243dbbe52d63e3bd65f79760b21ed3eff45ad6856a799774c399c18a02a32abd94622db31eb2cf72747e69a26a1b7f31a1

Download Submit
\Users\Admin\AppData\Local\Temp\d.exe
MD5
86ce2843c1f4a5f4585ceee1eb68d2e4

SHA1
7b3480b5c72accee0839d476ef2979c4c4755aea

SHA256
1af6703a93d8901ac9342797b59ebe03118ea89276f31737b79e8e15ba7fa58f

SHA512
133be13ca504fd760dceacd393c280243dbbe52d63e3bd65f79760b21ed3eff45ad6856a799774c399c18a02a32abd94622db31eb2cf72747e69a26a1b7f31a1

Download Submit
\Users\Admin\AppData\Local\Temp\d.exe
MD5
86ce2843c1f4a5f4585ceee1eb68d2e4

SHA1
7b3480b5c72accee0839d476ef2979c4c4755aea

SHA256
1af6703a93d8901ac9342797b59ebe03118ea89276f31737b79e8e15ba7fa58f

SHA512
133be13ca504fd760dceacd393c280243dbbe52d63e3bd65f79760b21ed3eff45ad6856a799774c399c18a02a32abd94622db31eb2cf72747e69a26a1b7f31a1

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\SYS\Syscal.exe
MD5
86ce2843c1f4a5f4585ceee1eb68d2e4

SHA1
7b3480b5c72accee0839d476ef2979c4c4755aea

SHA256
1af6703a93d8901ac9342797b59ebe03118ea89276f31737b79e8e15ba7fa58f

SHA512
133be13ca504fd760dceacd393c280243dbbe52d63e3bd65f79760b21ed3eff45ad6856a799774c399c18a02a32abd94622db31eb2cf72747e69a26a1b7f31a1

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\SYS\Syscal.exe
MD5
86ce2843c1f4a5f4585ceee1eb68d2e4

SHA1
7b3480b5c72accee0839d476ef2979c4c4755aea

SHA256
1af6703a93d8901ac9342797b59ebe03118ea89276f31737b79e8e15ba7fa58f

SHA512
133be13ca504fd760dceacd393c280243dbbe52d63e3bd65f79760b21ed3eff45ad6856a799774c399c18a02a32abd94622db31eb2cf72747e69a26a1b7f31a1

Download Submit
memory/268-60-0x0000000075801000-0x0000000075803000-memory.dmp

Filesize
8KB

Download
memory/268-91-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/960-54-0x0000000000380000-0x000000000038A000-memory.dmp

Filesize
40KB

Download
memory/960-55-0x0000000074D70000-0x000000007545E000-memory.dmp

Filesize
6.9MB

Download
memory/960-56-0x0000000000560000-0x0000000000561000-memory.dmp

Filesize
4KB

Download
memory/1056-62-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/1152-136-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads