acb75f310d2f3e27e6abefec316c9f9c432bab3cf8ed7a8fecc59333e2df5657

General

Target

chthonic_2.23.11.11.vir.exe
Size

176KB
MD5

bfc9f69fd742ae8c9a0b98496db341d7
SHA1

aa2c6cf2c1bb1a1f34dae8ff7bb27c7127f76fbf
SHA256

acb75f310d2f3e27e6abefec316c9f9c432bab3cf8ed7a8fecc59333e2df5657
SHA512

6b60bcd86f23b5ed26e89517c6627b54bfb7afcefb3a154150cb9e16f6cc8070295baa3c814f3c2708b2ad7e4bdfeb95422f63e44c237f421e67593709656aa5

Score

10^/10

evasion trojan persistence

Malware Config

Signatures

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

chthonic_2.23.11.11.vir.exe

description	pid	process	target process
PID 1516 wrote to memory of 4056	1516	chthonic_2.23.11.11.vir.exe	msiexec.exe
PID 1516 wrote to memory of 4056	1516	chthonic_2.23.11.11.vir.exe	msiexec.exe
PID 1516 wrote to memory of 4056	1516	chthonic_2.23.11.11.vir.exe	msiexec.exe
PID 1516 wrote to memory of 4056	1516	chthonic_2.23.11.11.vir.exe	msiexec.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

msiexec.exe

pid	process
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	msiexec.exe
4056	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

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\InternetExplorerT = "C:\\ProgramData\\Internet Explorer\\InternetExplorerT.exe"	msiexec.exe

Disables taskbar notifications via registry modification
evasion

Modifies Internet Explorer settings 1 TTPs 6 IoCs

adware spyware

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0"	msiexec.exe
Key created	\REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Internet Explorer\PhishingFilter	msiexec.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	msiexec.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\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

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

UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112
Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.11.11.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.11.11.vir.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1516

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Checks whether UAC is enabled
- Adds policy Run key to start application
- Modifies Internet Explorer settings
- System policy modification
PID:4056