46731281d5af0a524cbc8e459d1a5cd56b64caa9aec824902e53dfb9ccc021df

General

Target

chthonic_2.4.22.0.vir.exe
Size

188KB
MD5

3e20db8b47324b00afb542603e7ea98f
SHA1

3df96a679207e82599fac13d707d98829ebd69a3
SHA256

46731281d5af0a524cbc8e459d1a5cd56b64caa9aec824902e53dfb9ccc021df
SHA512

8a958c54ae222877ee123271bca85378545510543c729e290d07f70657865ba4f8c78e60d3a2a4f2f45c39e43e9ed6e8f8de71eff4400daef8979eb4721b42f2

Score

10^/10

evasion trojan persistence

Malware Config

Signatures

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

chthonic_2.4.22.0.vir.exechthonic_2.4.22.0.vir.exe

description	pid	process	target process
PID 2532 wrote to memory of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe
PID 2532 wrote to memory of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe
PID 2532 wrote to memory of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe
PID 2532 wrote to memory of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe
PID 2532 wrote to memory of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe
PID 2532 wrote to memory of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe
PID 2532 wrote to memory of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe
PID 2532 wrote to memory of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe
PID 3844 wrote to memory of 3952	3844	chthonic_2.4.22.0.vir.exe	msiexec.exe
PID 3844 wrote to memory of 3952	3844	chthonic_2.4.22.0.vir.exe	msiexec.exe
PID 3844 wrote to memory of 3952	3844	chthonic_2.4.22.0.vir.exe	msiexec.exe
PID 3844 wrote to memory of 3952	3844	chthonic_2.4.22.0.vir.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\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-1-5-21-2066881839-3229799743-3576549721-1000\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

Disables taskbar notifications via registry modification
evasion
UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112

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\AgentWindowsSidebar = "C:\\ProgramData\\Windows Sidebar\\AgentWindowsSidebar.exe"	msiexec.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

chthonic_2.4.22.0.vir.exe

pid process

2532 chthonic_2.4.22.0.vir.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

chthonic_2.4.22.0.vir.exe

description pid process target process

PID 2532 set thread context of 3844 2532 chthonic_2.4.22.0.vir.exe chthonic_2.4.22.0.vir.exe

pid	process
2532	chthonic_2.4.22.0.vir.exe

description	pid	process	target process
PID 2532 set thread context of 3844	2532	chthonic_2.4.22.0.vir.exe	chthonic_2.4.22.0.vir.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

Processes:

msiexec.exe

pid	process
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe
3952	msiexec.exe

Deletes itself 1 IoCs

Processes:

msiexec.exe

pid process

3952 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

C:\Users\Admin\AppData\Local\Temp\chthonic_2.4.22.0.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.4.22.0.vir.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetWindowsHookEx
- Suspicious use of SetThreadContext
PID:2532

C:\Users\Admin\AppData\Local\Temp\chthonic_2.4.22.0.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.4.22.0.vir.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3844

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Modifies Internet Explorer settings
- Adds policy Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Deletes itself
- System policy modification
- Checks whether UAC is enabled
PID:3952

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

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Downloads

memory/3844-2-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3844-3-0x0000000000401D47-mapping.dmp

Download
memory/3844-4-0x0000000000401D47-mapping.dmp

Download
memory/3844-5-0x0000000000401D47-mapping.dmp

Download
memory/3844-10-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3952-9-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads