698cac7bc0d6445600eea6804bb603352827bc915114015f37b3f17fdb0f960f

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	csrcs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrcs = "C:\\Windows\\SysWOW64\\csrcs.exe"	csrcs.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrcs = "C:\\Windows\\SysWOW64\\csrcs.exe"	e1c9c8e8879073124237095a12f42748_JaffaCakes118.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
4332	csrcs.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3296-0-0x0000000000400000-0x00000000004BD000-memory.dmp	upx
behavioral2/files/0x0009000000023445-12.dat	upx
behavioral2/memory/3296-29-0x0000000000400000-0x00000000004BD000-memory.dmp	upx
behavioral2/memory/4332-30-0x0000000000400000-0x00000000004BD000-memory.dmp	upx
behavioral2/memory/4332-61-0x0000000000400000-0x00000000004BD000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\csrcs = "C:\\Windows\\SysWOW64\\csrcs.exe"	csrcs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunServices\csrcs = "C:\\Windows\\SysWOW64\\csrcs.exe"	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	csrcs.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
55	checkip.dyndns.org

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/3296-29-0x0000000000400000-0x00000000004BD000-memory.dmp	autoit_exe
behavioral2/memory/4332-30-0x0000000000400000-0x00000000004BD000-memory.dmp	autoit_exe
behavioral2/memory/4332-61-0x0000000000400000-0x00000000004BD000-memory.dmp	autoit_exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\csrcs.exe	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\csrcs.exe	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\autorun.in	csrcs.exe
File opened for modification	C:\Windows\SysWOW64\autorun.i	csrcs.exe

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

System Information Discovery
T1082

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	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrcs.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3296 wrote to memory of 4332	3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe	88
PID 3296 wrote to memory of 4332	3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe	88
PID 3296 wrote to memory of 4332	3296	e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe	88

C:\Users\Admin\AppData\Local\Temp\e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e1c9c8e8879073124237095a12f42748_JaffaCakes118.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3296
- C:\Windows\SysWOW64\csrcs.exe
  "C:\Windows\SysWOW64\csrcs.exe"
  2⤵
  - Modifies visiblity of hidden/system files in Explorer
  - Adds policy Run key to start application
  - Executes dropped EXE
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  PID:4332

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

3

T1082

System Location Discovery

T1614

System Language Discovery