darkcomet | 1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

Analysis

max time kernel
150s
max time network
145s
platform
windows7_x64
resource
win7v20201028
submitted
28-02-2021 11:16

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General

Target

1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
Size

594KB
MD5

6815e92e3b69abb83257aff53ccf411b
SHA1

dd588b78d08d8eea3f553fe1cec692ac2340111b
SHA256

1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22
SHA512

1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Score

10^/10

darkcomet evasion persistence rat trojan upx

Malware Config

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:

svhostis.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\\skypes.exe"	svhostis.exe

Disables Task Manager via registry modification
evasion
Drops file in Drivers directory 1 IoCs

Processes:

svhostis.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts svhostis.exe
Executes dropped EXE 3 IoCs

Processes:

svhostis.exeskypes.exesvhostis.exe

pid process

1320 svhostis.exe
1500 skypes.exe
912 svhostis.exe

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	svhostis.exe

pid	process
1320	svhostis.exe
1500	skypes.exe
912	svhostis.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1320-5-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral1/memory/1320-12-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral1/memory/912-31-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

Loads dropped DLL 3 IoCs

Processes:

1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exesvhostis.exeskypes.exe

pid process

1044 1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
1320 svhostis.exe
1500 skypes.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svhostis.exesvhostis.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\skype64 = "C:\\Users\\Admin\\Documents\\skypes.exe"	svhostis.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\skype64 = "C:\\Users\\Admin\\Documents\\skypes.exe"	svhostis.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exeskypes.exe

description	pid	process	target process
PID 1044 set thread context of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1500 set thread context of 912	1500	skypes.exe	svhostis.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exeskypes.exe

pid	process
1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
1500	skypes.exe
1500	skypes.exe
1500	skypes.exe

Suspicious use of AdjustPrivilegeToken 52 IoCs

Processes:

1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exesvhostis.exeskypes.exesvhostis.exe

description	pid	process
Token: SeDebugPrivilege	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
Token: 33	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
Token: SeIncBasePriorityPrivilege	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
Token: SeIncreaseQuotaPrivilege	1320	svhostis.exe
Token: SeSecurityPrivilege	1320	svhostis.exe
Token: SeTakeOwnershipPrivilege	1320	svhostis.exe
Token: SeLoadDriverPrivilege	1320	svhostis.exe
Token: SeSystemProfilePrivilege	1320	svhostis.exe
Token: SeSystemtimePrivilege	1320	svhostis.exe
Token: SeProfSingleProcessPrivilege	1320	svhostis.exe
Token: SeIncBasePriorityPrivilege	1320	svhostis.exe
Token: SeCreatePagefilePrivilege	1320	svhostis.exe
Token: SeBackupPrivilege	1320	svhostis.exe
Token: SeRestorePrivilege	1320	svhostis.exe
Token: SeShutdownPrivilege	1320	svhostis.exe
Token: SeDebugPrivilege	1320	svhostis.exe
Token: SeSystemEnvironmentPrivilege	1320	svhostis.exe
Token: SeChangeNotifyPrivilege	1320	svhostis.exe
Token: SeRemoteShutdownPrivilege	1320	svhostis.exe
Token: SeUndockPrivilege	1320	svhostis.exe
Token: SeManageVolumePrivilege	1320	svhostis.exe
Token: SeImpersonatePrivilege	1320	svhostis.exe
Token: SeCreateGlobalPrivilege	1320	svhostis.exe
Token: 33	1320	svhostis.exe
Token: 34	1320	svhostis.exe
Token: 35	1320	svhostis.exe
Token: SeDebugPrivilege	1500	skypes.exe
Token: 33	1500	skypes.exe
Token: SeIncBasePriorityPrivilege	1500	skypes.exe
Token: SeIncreaseQuotaPrivilege	912	svhostis.exe
Token: SeSecurityPrivilege	912	svhostis.exe
Token: SeTakeOwnershipPrivilege	912	svhostis.exe
Token: SeLoadDriverPrivilege	912	svhostis.exe
Token: SeSystemProfilePrivilege	912	svhostis.exe
Token: SeSystemtimePrivilege	912	svhostis.exe
Token: SeProfSingleProcessPrivilege	912	svhostis.exe
Token: SeIncBasePriorityPrivilege	912	svhostis.exe
Token: SeCreatePagefilePrivilege	912	svhostis.exe
Token: SeBackupPrivilege	912	svhostis.exe
Token: SeRestorePrivilege	912	svhostis.exe
Token: SeShutdownPrivilege	912	svhostis.exe
Token: SeDebugPrivilege	912	svhostis.exe
Token: SeSystemEnvironmentPrivilege	912	svhostis.exe
Token: SeChangeNotifyPrivilege	912	svhostis.exe
Token: SeRemoteShutdownPrivilege	912	svhostis.exe
Token: SeUndockPrivilege	912	svhostis.exe
Token: SeManageVolumePrivilege	912	svhostis.exe
Token: SeImpersonatePrivilege	912	svhostis.exe
Token: SeCreateGlobalPrivilege	912	svhostis.exe
Token: 33	912	svhostis.exe
Token: 34	912	svhostis.exe
Token: 35	912	svhostis.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

svhostis.exe

pid process

912 svhostis.exe

pid	process
912	svhostis.exe

Suspicious use of WriteProcessMemory 61 IoCs

Processes:

1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exesvhostis.exeskypes.exesvhostis.exe

description	pid	process	target process
PID 1044 wrote to memory of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1044 wrote to memory of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1044 wrote to memory of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1044 wrote to memory of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1044 wrote to memory of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1044 wrote to memory of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1044 wrote to memory of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1044 wrote to memory of 1320	1044	1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe	svhostis.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1452	1320	svhostis.exe	notepad.exe
PID 1320 wrote to memory of 1500	1320	svhostis.exe	skypes.exe
PID 1320 wrote to memory of 1500	1320	svhostis.exe	skypes.exe
PID 1320 wrote to memory of 1500	1320	svhostis.exe	skypes.exe
PID 1320 wrote to memory of 1500	1320	svhostis.exe	skypes.exe
PID 1500 wrote to memory of 912	1500	skypes.exe	svhostis.exe
PID 1500 wrote to memory of 912	1500	skypes.exe	svhostis.exe
PID 1500 wrote to memory of 912	1500	skypes.exe	svhostis.exe
PID 1500 wrote to memory of 912	1500	skypes.exe	svhostis.exe
PID 1500 wrote to memory of 912	1500	skypes.exe	svhostis.exe
PID 1500 wrote to memory of 912	1500	skypes.exe	svhostis.exe
PID 1500 wrote to memory of 912	1500	skypes.exe	svhostis.exe
PID 1500 wrote to memory of 912	1500	skypes.exe	svhostis.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe
PID 912 wrote to memory of 956	912	svhostis.exe	notepad.exe

C:\Users\Admin\AppData\Local\Temp\1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe
"C:\Users\Admin\AppData\Local\Temp\1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1044

C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
"C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe"
2⤵
- Modifies WinLogon for persistence
- Drops file in Drivers directory
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1320

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:1452

C:\Users\Admin\Documents\skypes.exe
"C:\Users\Admin\Documents\skypes.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1500

C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
"C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe"
4⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:912

C:\Windows\SysWOW64\notepad.exe
notepad
5⤵
PID:956

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
C:\Users\Admin\Documents\skypes.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
C:\Users\Admin\Documents\skypes.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
\Users\Admin\AppData\Local\Temp\vY5tyhPjQ9k3sUGd\svhostis.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
\Users\Admin\Documents\skypes.exe
MD5
6815e92e3b69abb83257aff53ccf411b

SHA1
dd588b78d08d8eea3f553fe1cec692ac2340111b

SHA256
1810092b7599bad7adea10aeaf4df0c2af29fc85c0904662bab674f231752e22

SHA512
1227bf5619eb7ae56ca4382db764cb55db5a77c3f549cfc478ddee59e35f24408848e737f005209ffa289414a2eb6f5128bd002c95448b103485e33f5bb054a1

Download Submit
memory/912-33-0x0000000000110000-0x0000000000111000-memory.dmp

Filesize
4KB

Download
memory/912-24-0x00000000004B57C0-mapping.dmp

Download
memory/912-31-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/956-28-0x0000000000000000-mapping.dmp

Download
memory/956-29-0x00000000001A0000-0x00000000001A1000-memory.dmp

Filesize
4KB

Download
memory/1044-2-0x00000000760A1000-0x00000000760A3000-memory.dmp

Filesize
8KB

Download
memory/1044-3-0x0000000000640000-0x0000000000641000-memory.dmp

Filesize
4KB

Download
memory/1320-6-0x00000000004B57C0-mapping.dmp

Download
memory/1320-12-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1320-5-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1320-13-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/1452-10-0x0000000000000000-mapping.dmp

Download
memory/1452-11-0x0000000000150000-0x0000000000151000-memory.dmp

Filesize
4KB

Download
memory/1500-21-0x00000000008E0000-0x00000000008E1000-memory.dmp

Filesize
4KB

Download
memory/1500-16-0x0000000000000000-mapping.dmp

Download