45167945141c95c5a012feeb0fcfc6667fc43e781cd9e43ab0be4bcc1b9ed6b2

General

Target

chthonic_2.23.12.5.vir.exe
Size

176KB
MD5

acc02f42f2a109e71906d07f4d6f59c8
SHA1

555d9c19b2a56ff085582b6a08131de0bd0a010b
SHA256

45167945141c95c5a012feeb0fcfc6667fc43e781cd9e43ab0be4bcc1b9ed6b2
SHA512

597e521f80ed1f402db1181b8ec34cef2664183de594992463d57ea97e4f7df998947c9d498c6e528a5bc7e6c28a693f579137f6896201fad082b3d16330f52f

Score

10^/10

evasion trojan persistence

Malware Config

Signatures

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

msiexec.exe

pid process

1172 msiexec.exe
1172 msiexec.exe

pid	process
1172	msiexec.exe
1172	msiexec.exe

Blacklisted process makes network request 12 IoCs

Processes:

msiexec.exe

flow	pid	process
2	1172	msiexec.exe
5	1172	msiexec.exe
8	1172	msiexec.exe
11	1172	msiexec.exe
12	1172	msiexec.exe
13	1172	msiexec.exe
14	1172	msiexec.exe
15	1172	msiexec.exe
16	1172	msiexec.exe
17	1172	msiexec.exe
18	1172	msiexec.exe
19	1172	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

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

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-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	msiexec.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\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-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\PhishingFilter	msiexec.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

chthonic_2.23.12.5.vir.exe

description	pid	process	target process
PID 1080 wrote to memory of 1172	1080	chthonic_2.23.12.5.vir.exe	msiexec.exe
PID 1080 wrote to memory of 1172	1080	chthonic_2.23.12.5.vir.exe	msiexec.exe
PID 1080 wrote to memory of 1172	1080	chthonic_2.23.12.5.vir.exe	msiexec.exe
PID 1080 wrote to memory of 1172	1080	chthonic_2.23.12.5.vir.exe	msiexec.exe
PID 1080 wrote to memory of 1172	1080	chthonic_2.23.12.5.vir.exe	msiexec.exe
PID 1080 wrote to memory of 1172	1080	chthonic_2.23.12.5.vir.exe	msiexec.exe
PID 1080 wrote to memory of 1172	1080	chthonic_2.23.12.5.vir.exe	msiexec.exe
PID 1080 wrote to memory of 1172	1080	chthonic_2.23.12.5.vir.exe	msiexec.exe

Deletes itself 1 IoCs

Processes:

msiexec.exe

pid process

1172 msiexec.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msiexec.exe

pid process

1172 msiexec.exe
Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

pid	process
1172	msiexec.exe

pid	process
1172	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\cCommonFiles = "C:\\ProgramData\\Common Files\\cCommonFiles.exe"	msiexec.exe

Disables taskbar notifications via registry modification
evasion

C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.12.5.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.12.5.vir.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1080

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Blacklisted process makes network request
- System policy modification
- Checks whether UAC is enabled
- Modifies Internet Explorer settings
- Deletes itself
- Suspicious behavior: GetForegroundWindowSpam
- Adds policy Run key to start application
PID:1172