darkcomet | 074193e6032463916cca5208b1dd4eaea758dfb41684888438e01cc7c8bf795f

General

Target

a49f8963a4c3949b06e4301caa2de435.exe
Size

318KB
MD5

a49f8963a4c3949b06e4301caa2de435
SHA1

2784038e702ea56c70b56d0ba2dab6dac5512746
SHA256

074193e6032463916cca5208b1dd4eaea758dfb41684888438e01cc7c8bf795f
SHA512

f3b43f49bb38c7ff98eae0657a272d1b877a76586b0226969f8c6f5063b80fcce675ad49fa727b9dd68d32b300c8472ceb3e2ca0d38c629fdd8aded948b9208d
SSDEEP

6144:DcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37yJh:DcW7KEZlPzCy37E

Score

10^/10

darkcomet sazan evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Sazan

C2

127.0.0.1:1604

185.29.120.189:1604

Mutex

DC_MUTEX-C85CWU2

Attributes

InstallPath
S1\updater.exe
gencode
DlWfWyuahoYK
install
true
offline_keylogger
true
persistence
true
reg_key
Windows Firewall

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

T1547.004

Modify Registry

T1112

Processes:

a49f8963a4c3949b06e4301caa2de435.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\S1\\updater.exe"	a49f8963a4c3949b06e4301caa2de435.exe

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

updater.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	updater.exe

Disables Task Manager via registry modification
evasion
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exeattrib.exe

pid process

4924 attrib.exe
1888 attrib.exe

pid	process
4924	attrib.exe
1888	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

a49f8963a4c3949b06e4301caa2de435.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	a49f8963a4c3949b06e4301caa2de435.exe

Deletes itself 1 IoCs

Processes:

notepad.exe

pid process

3328 notepad.exe
Executes dropped EXE 1 IoCs

Processes:

updater.exe

pid process

3120 updater.exe

pid	process
3328	notepad.exe

pid	process
3120	updater.exe

UPX packed file 13 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1540-0-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/1540-4-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
C:\ProgramData\Microsoft\Windows\Start Menu\S1\updater.exe	upx
behavioral2/memory/3120-15-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/1540-19-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/3120-21-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/3120-22-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/3120-23-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/3120-25-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/3120-27-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/3120-28-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/3120-30-0x0000000000400000-0x00000000004D8000-memory.dmp	upx
behavioral2/memory/3120-32-0x0000000000400000-0x00000000004D8000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

updater.exea49f8963a4c3949b06e4301caa2de435.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Firewall = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\S1\\updater.exe"	updater.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3844919115-497234255-166257750-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Firewall = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\S1\\updater.exe"	a49f8963a4c3949b06e4301caa2de435.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

a49f8963a4c3949b06e4301caa2de435.exeupdater.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeSecurityPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeTakeOwnershipPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeLoadDriverPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeSystemProfilePrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeSystemtimePrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeProfSingleProcessPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeIncBasePriorityPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeCreatePagefilePrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeBackupPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeRestorePrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeShutdownPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeDebugPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeSystemEnvironmentPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeChangeNotifyPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeRemoteShutdownPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeUndockPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeManageVolumePrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeImpersonatePrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeCreateGlobalPrivilege	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: 33	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: 34	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: 35	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: 36	1540	a49f8963a4c3949b06e4301caa2de435.exe
Token: SeIncreaseQuotaPrivilege	3120	updater.exe
Token: SeSecurityPrivilege	3120	updater.exe
Token: SeTakeOwnershipPrivilege	3120	updater.exe
Token: SeLoadDriverPrivilege	3120	updater.exe
Token: SeSystemProfilePrivilege	3120	updater.exe
Token: SeSystemtimePrivilege	3120	updater.exe
Token: SeProfSingleProcessPrivilege	3120	updater.exe
Token: SeIncBasePriorityPrivilege	3120	updater.exe
Token: SeCreatePagefilePrivilege	3120	updater.exe
Token: SeBackupPrivilege	3120	updater.exe
Token: SeRestorePrivilege	3120	updater.exe
Token: SeShutdownPrivilege	3120	updater.exe
Token: SeDebugPrivilege	3120	updater.exe
Token: SeSystemEnvironmentPrivilege	3120	updater.exe
Token: SeChangeNotifyPrivilege	3120	updater.exe
Token: SeRemoteShutdownPrivilege	3120	updater.exe
Token: SeUndockPrivilege	3120	updater.exe
Token: SeManageVolumePrivilege	3120	updater.exe
Token: SeImpersonatePrivilege	3120	updater.exe
Token: SeCreateGlobalPrivilege	3120	updater.exe
Token: 33	3120	updater.exe
Token: 34	3120	updater.exe
Token: 35	3120	updater.exe
Token: 36	3120	updater.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

updater.exe

pid process

3120 updater.exe

pid	process
3120	updater.exe

Suspicious use of WriteProcessMemory 54 IoCs

Processes:

a49f8963a4c3949b06e4301caa2de435.execmd.execmd.exeupdater.exe

description	pid	process	target process
PID 1540 wrote to memory of 3748	1540	a49f8963a4c3949b06e4301caa2de435.exe	cmd.exe
PID 1540 wrote to memory of 3748	1540	a49f8963a4c3949b06e4301caa2de435.exe	cmd.exe
PID 1540 wrote to memory of 3748	1540	a49f8963a4c3949b06e4301caa2de435.exe	cmd.exe
PID 1540 wrote to memory of 1896	1540	a49f8963a4c3949b06e4301caa2de435.exe	cmd.exe
PID 1540 wrote to memory of 1896	1540	a49f8963a4c3949b06e4301caa2de435.exe	cmd.exe
PID 1540 wrote to memory of 1896	1540	a49f8963a4c3949b06e4301caa2de435.exe	cmd.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3328	1540	a49f8963a4c3949b06e4301caa2de435.exe	notepad.exe
PID 1540 wrote to memory of 3120	1540	a49f8963a4c3949b06e4301caa2de435.exe	updater.exe
PID 1540 wrote to memory of 3120	1540	a49f8963a4c3949b06e4301caa2de435.exe	updater.exe
PID 1540 wrote to memory of 3120	1540	a49f8963a4c3949b06e4301caa2de435.exe	updater.exe
PID 3748 wrote to memory of 4924	3748	cmd.exe	attrib.exe
PID 3748 wrote to memory of 4924	3748	cmd.exe	attrib.exe
PID 3748 wrote to memory of 4924	3748	cmd.exe	attrib.exe
PID 1896 wrote to memory of 1888	1896	cmd.exe	attrib.exe
PID 1896 wrote to memory of 1888	1896	cmd.exe	attrib.exe
PID 1896 wrote to memory of 1888	1896	cmd.exe	attrib.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe
PID 3120 wrote to memory of 3792	3120	updater.exe	notepad.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exeattrib.exe

pid process

1888 attrib.exe
4924 attrib.exe

pid	process
1888	attrib.exe
4924	attrib.exe

C:\Users\Admin\AppData\Local\Temp\a49f8963a4c3949b06e4301caa2de435.exe
"C:\Users\Admin\AppData\Local\Temp\a49f8963a4c3949b06e4301caa2de435.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1540

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\a49f8963a4c3949b06e4301caa2de435.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:3748

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\a49f8963a4c3949b06e4301caa2de435.exe" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:4924

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:1896

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:1888

C:\Windows\SysWOW64\notepad.exe
notepad
2⤵
- Deletes itself
PID:3328

C:\ProgramData\Microsoft\Windows\Start Menu\S1\updater.exe
"C:\ProgramData\Microsoft\Windows\Start Menu\S1\updater.exe"
2⤵
- Disables RegEdit via registry modification
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3120

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:3792

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

2

T1112

Hide Artifacts

2

T1564

Hidden Files and Directories

2

T1564.001

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\ProgramData\Microsoft\Windows\Start Menu\S1\updater.exe
Filesize
318KB

MD5
a49f8963a4c3949b06e4301caa2de435

SHA1
2784038e702ea56c70b56d0ba2dab6dac5512746

SHA256
074193e6032463916cca5208b1dd4eaea758dfb41684888438e01cc7c8bf795f

SHA512
f3b43f49bb38c7ff98eae0657a272d1b877a76586b0226969f8c6f5063b80fcce675ad49fa727b9dd68d32b300c8472ceb3e2ca0d38c629fdd8aded948b9208d

Download Submit
memory/1540-19-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/1540-4-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/1540-0-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/1540-1-0x0000000000B30000-0x0000000000B31000-memory.dmp

Filesize
4KB

Download
memory/3120-23-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3120-17-0x00000000009F0000-0x00000000009F1000-memory.dmp

Filesize
4KB

Download
memory/3120-21-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3120-15-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3120-22-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3120-25-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3120-27-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3120-28-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3120-30-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3120-32-0x0000000000400000-0x00000000004D8000-memory.dmp

Filesize
864KB

Download
memory/3328-5-0x0000000001360000-0x0000000001361000-memory.dmp

Filesize
4KB

Download
memory/3792-18-0x0000000000CA0000-0x0000000000CA1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads