darkcomet | 3590ab586aa6063313dfe5cc9c55fec102db3bec670cde515c2534b2cc59258f

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	vbc.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Chrome = "C:\\ProgramData\\Services.exe"	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3364 set thread context of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85

UPX packed file 27 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4940-3-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-4-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-5-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-9-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-8-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-12-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-15-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-13-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-11-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-10-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-16-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-17-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-18-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-19-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-20-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-21-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-22-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-23-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-24-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-25-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-26-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-27-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-28-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-29-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-30-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-31-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4940-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	vbc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	vbc.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	vbc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	vbc.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	vbc.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4940	vbc.exe
Token: SeSecurityPrivilege	4940	vbc.exe
Token: SeTakeOwnershipPrivilege	4940	vbc.exe
Token: SeLoadDriverPrivilege	4940	vbc.exe
Token: SeSystemProfilePrivilege	4940	vbc.exe
Token: SeSystemtimePrivilege	4940	vbc.exe
Token: SeProfSingleProcessPrivilege	4940	vbc.exe
Token: SeIncBasePriorityPrivilege	4940	vbc.exe
Token: SeCreatePagefilePrivilege	4940	vbc.exe
Token: SeBackupPrivilege	4940	vbc.exe
Token: SeRestorePrivilege	4940	vbc.exe
Token: SeShutdownPrivilege	4940	vbc.exe
Token: SeDebugPrivilege	4940	vbc.exe
Token: SeSystemEnvironmentPrivilege	4940	vbc.exe
Token: SeChangeNotifyPrivilege	4940	vbc.exe
Token: SeRemoteShutdownPrivilege	4940	vbc.exe
Token: SeUndockPrivilege	4940	vbc.exe
Token: SeManageVolumePrivilege	4940	vbc.exe
Token: SeImpersonatePrivilege	4940	vbc.exe
Token: SeCreateGlobalPrivilege	4940	vbc.exe
Token: 33	4940	vbc.exe
Token: 34	4940	vbc.exe
Token: 35	4940	vbc.exe
Token: 36	4940	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4940	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85
PID 3364 wrote to memory of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85
PID 3364 wrote to memory of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85
PID 3364 wrote to memory of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85
PID 3364 wrote to memory of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85
PID 3364 wrote to memory of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85
PID 3364 wrote to memory of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85
PID 3364 wrote to memory of 4940	3364	JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe	85

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dd227665ce760898a6f92c218fc71df.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3364
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - Checks BIOS information in registry
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4940

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

3

System Location Discovery

T1614

System Language Discovery