ac8006c65da9bfedca11b142c2b4cd176c1559e55aef528155136f513abc4494

General

Target

chthonic_2.4.16.0.vir.exe
Size

173KB
MD5

4162cd6ddf3eb2678b7a35b5f8b2597e
SHA1

57bffa67e38a02a6b06575a9f1bf467bcdbca3fe
SHA256

ac8006c65da9bfedca11b142c2b4cd176c1559e55aef528155136f513abc4494
SHA512

1b74b8bd6f46bed59b7db3557a202d37cc28818ff297c1e18f493c61abcb236c27769f9196fbe6ff18b324692c1ba3e00b1a8dce63127e8413409326797b5618

Score

10^/10

evasion trojan persistence

Malware Config

Signatures

Modifies Internet Explorer settings 1 TTPs 6 IoCs

adware spyware

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0"	msiexec.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Internet Explorer\PhishingFilter	msiexec.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	msiexec.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0"	msiexec.exe
Key created	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Internet Explorer\PhishingFilter	msiexec.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	msiexec.exe

System policy modification 1 TTPs 5 IoCs

evasion

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\policies\Explorer	msiexec.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\TaskbarNoNotification = "1"	msiexec.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\HideSCAHealth = "1"	msiexec.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\policies\system	msiexec.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	msiexec.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

chthonic_2.4.16.0.vir.exe

description	pid	process	target process
PID 3588 wrote to memory of 4068	3588	chthonic_2.4.16.0.vir.exe	msiexec.exe
PID 3588 wrote to memory of 4068	3588	chthonic_2.4.16.0.vir.exe	msiexec.exe
PID 3588 wrote to memory of 4068	3588	chthonic_2.4.16.0.vir.exe	msiexec.exe
PID 3588 wrote to memory of 4068	3588	chthonic_2.4.16.0.vir.exe	msiexec.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

msiexec.exe

pid	process
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe
4068	msiexec.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

msiexec.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	msiexec.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	msiexec.exe

UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\Policies\Explorer\Run	msiexec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\syncWindowsMediaPlayer = "C:\\ProgramData\\Windows Media Player\\syncWindowsMediaPlayer.exe"	msiexec.exe

Disables taskbar notifications via registry modification
evasion

C:\Users\Admin\AppData\Local\Temp\chthonic_2.4.16.0.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.4.16.0.vir.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3588

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
2⤵
- Modifies Internet Explorer settings
- System policy modification
- Suspicious behavior: EnumeratesProcesses
- Checks whether UAC is enabled
- Adds policy Run key to start application
PID:4068