5b9a8fa88eb68e5b46666e38e99863c886e4e1c4d2cf6a04e0dd8416375c859c

General

Target

chthonic_2.3.4.0.vir.exe
Size

128KB
MD5

c4af7ce037b81fb9dfe9bec845cc671e
SHA1

c4aa5e22525a4c05df2dded4ce8b4adf731b4df0
SHA256

5b9a8fa88eb68e5b46666e38e99863c886e4e1c4d2cf6a04e0dd8416375c859c
SHA512

9551df881051cee0980c2a5d1b69523bf60b38f04b77774d8e32bb9784bfcc28cf402aaa84f06878a63525964fe44d1efa2111bc8ec4241e10f6d53328e99eb2

Score

10^/10

evasion trojan persistence

Malware Config

Signatures

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\mgrWindowsPowerShell = "C:\\ProgramData\\WindowsPowerShell\\mgrWindowsPowerShell.exe"	msiexec.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\Policies\Explorer\Run	msiexec.exe

Disables taskbar notifications via registry modification
evasion
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

chthonic_2.3.4.0.vir.exe

pid process

1304 chthonic_2.3.4.0.vir.exe

pid	process
1304	chthonic_2.3.4.0.vir.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

chthonic_2.3.4.0.vir.exechthonic_2.3.4.0.vir.exe

description	pid	process	target process
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1304 wrote to memory of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe
PID 1384 wrote to memory of 1436	1384	chthonic_2.3.4.0.vir.exe	msiexec.exe
PID 1384 wrote to memory of 1436	1384	chthonic_2.3.4.0.vir.exe	msiexec.exe
PID 1384 wrote to memory of 1436	1384	chthonic_2.3.4.0.vir.exe	msiexec.exe
PID 1384 wrote to memory of 1436	1384	chthonic_2.3.4.0.vir.exe	msiexec.exe
PID 1384 wrote to memory of 1436	1384	chthonic_2.3.4.0.vir.exe	msiexec.exe
PID 1384 wrote to memory of 1436	1384	chthonic_2.3.4.0.vir.exe	msiexec.exe
PID 1384 wrote to memory of 1436	1384	chthonic_2.3.4.0.vir.exe	msiexec.exe
PID 1384 wrote to memory of 1436	1384	chthonic_2.3.4.0.vir.exe	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

chthonic_2.3.4.0.vir.exe

description pid process target process

PID 1304 set thread context of 1384 1304 chthonic_2.3.4.0.vir.exe chthonic_2.3.4.0.vir.exe

description	pid	process	target process
PID 1304 set thread context of 1384	1304	chthonic_2.3.4.0.vir.exe	chthonic_2.3.4.0.vir.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

msiexec.exe

pid	process
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe
1436	msiexec.exe

Deletes itself 1 IoCs

Processes:

msiexec.exe

pid process

1436 msiexec.exe
UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112

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
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

Modifies Internet Explorer settings 1 TTPs 6 IoCs

adware spyware

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Internet Explorer\PhishingFilter	msiexec.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	msiexec.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\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_2.3.4.0.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.3.4.0.vir.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:1304

C:\Users\Admin\AppData\Local\Temp\chthonic_2.3.4.0.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.3.4.0.vir.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1384

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Adds policy Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Deletes itself
- System policy modification
- Checks whether UAC is enabled
- Modifies Internet Explorer settings
PID:1436

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Modify Registry

4

T1112

Bypass User Account Control

1

T1088

Disabling Security Tools

1

T1089

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1384-2-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download
memory/1384-3-0x0000000000401B80-mapping.dmp

Download
memory/1436-4-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads