3dc6116deb18fa9aec4e567b26ca77b9f7681cbdb2b6f29ce1665fcfd8b8f5ce

General

Target

chthonic_2.23.14.4.vir.exe
Size

308KB
MD5

a163c669174cd18fda083d8819d10e6a
SHA1

4aaaafbee73e9a98231cd74815cac9d70c9d1eaf
SHA256

3dc6116deb18fa9aec4e567b26ca77b9f7681cbdb2b6f29ce1665fcfd8b8f5ce
SHA512

676e485950e96f0a436a60ff7ec1b5bdc60ad90fb2fb8e920e10c9929ff362656d10c020f6b9ed8c095e7923a706462eb8fe17fb426fc02b7d77cf96cf9ae8d9

Score

10^/10

evasion trojan persistence

Malware Config

Signatures

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

chthonic_2.23.14.4.vir.exe

description	pid	process	target process
PID 3920 wrote to memory of 3908	3920	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 3920 wrote to memory of 3908	3920	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 3920 wrote to memory of 3908	3920	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 3920 wrote to memory of 3908	3920	chthonic_2.23.14.4.vir.exe	msiexec.exe

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

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

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\yWindowsNT = "C:\\ProgramData\\Windows NT\\yWindowsNT.exe"	msiexec.exe

Disables taskbar notifications via registry modification
evasion

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\system	msiexec.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	msiexec.exe
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

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

msiexec.exe

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

UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

msiexec.exe

pid process

3908 msiexec.exe
3908 msiexec.exe
3908 msiexec.exe
3908 msiexec.exe

pid	process
3908	msiexec.exe
3908	msiexec.exe
3908	msiexec.exe
3908	msiexec.exe

Blacklisted process makes network request 17 IoCs

Processes:

msiexec.exe

flow	pid	process
3	3908	msiexec.exe
4	3908	msiexec.exe
5	3908	msiexec.exe
6	3908	msiexec.exe
7	3908	msiexec.exe
8	3908	msiexec.exe
9	3908	msiexec.exe
12	3908	msiexec.exe
22	3908	msiexec.exe
24	3908	msiexec.exe
25	3908	msiexec.exe
26	3908	msiexec.exe
27	3908	msiexec.exe
28	3908	msiexec.exe
29	3908	msiexec.exe
30	3908	msiexec.exe
31	3908	msiexec.exe

Modifies Internet Explorer settings 1 TTPs 6 IoCs

adware spyware

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
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
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

C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.14.4.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.14.4.vir.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3920

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
2⤵
- Adds policy Run key to start application
- System policy modification
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Blacklisted process makes network request
- Modifies Internet Explorer settings
PID:3908