3dc6116deb18fa9aec4e567b26ca77b9f7681cbdb2b6f29ce1665fcfd8b8f5ce

General

Target

chthonic_2.23.14.4.vir.exe
Size

308KB
MD5

a163c669174cd18fda083d8819d10e6a
SHA1

4aaaafbee73e9a98231cd74815cac9d70c9d1eaf
SHA256

3dc6116deb18fa9aec4e567b26ca77b9f7681cbdb2b6f29ce1665fcfd8b8f5ce
SHA512

676e485950e96f0a436a60ff7ec1b5bdc60ad90fb2fb8e920e10c9929ff362656d10c020f6b9ed8c095e7923a706462eb8fe17fb426fc02b7d77cf96cf9ae8d9

Score

10^/10

persistence evasion trojan

Malware Config

Signatures

Suspicious use of UnmapMainImage 1 IoCs

Processes:

chthonic_2.23.14.4.vir.exe

pid process

892 chthonic_2.23.14.4.vir.exe
Deletes itself 1 IoCs

Processes:

msiexec.exe

pid process

1296 msiexec.exe

pid	process
892	chthonic_2.23.14.4.vir.exe

pid	process
1296	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\WindowsSidebarR = "C:\\ProgramData\\Windows Sidebar\\WindowsSidebarR.exe"	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-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Internet Explorer\PhishingFilter	msiexec.exe
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

System policy modification 1 TTPs 5 IoCs

evasion

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
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
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

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

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

chthonic_2.23.14.4.vir.exe

description	pid	process	target process
PID 892 wrote to memory of 1296	892	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 892 wrote to memory of 1296	892	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 892 wrote to memory of 1296	892	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 892 wrote to memory of 1296	892	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 892 wrote to memory of 1296	892	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 892 wrote to memory of 1296	892	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 892 wrote to memory of 1296	892	chthonic_2.23.14.4.vir.exe	msiexec.exe
PID 892 wrote to memory of 1296	892	chthonic_2.23.14.4.vir.exe	msiexec.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

msiexec.exe

pid process

1296 msiexec.exe
1296 msiexec.exe

pid	process
1296	msiexec.exe
1296	msiexec.exe

Blacklisted process makes network request 14 IoCs

Processes:

msiexec.exe

flow	pid	process
1	1296	msiexec.exe
2	1296	msiexec.exe
3	1296	msiexec.exe
4	1296	msiexec.exe
5	1296	msiexec.exe
8	1296	msiexec.exe
11	1296	msiexec.exe
14	1296	msiexec.exe
15	1296	msiexec.exe
16	1296	msiexec.exe
17	1296	msiexec.exe
20	1296	msiexec.exe
21	1296	msiexec.exe
22	1296	msiexec.exe

Disables taskbar notifications via registry modification
evasion

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

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 UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:892

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
2⤵
- Deletes itself
- Adds policy Run key to start application
- Modifies Internet Explorer settings
- System policy modification
- Suspicious behavior: EnumeratesProcesses
- Blacklisted process makes network request
- Checks whether UAC is enabled
PID:1296