1cd004a6d75bc1ebf7d92ddd6af583caad44dd750906e4797460e7e615e777a7

General

Target

chthonic_2.23.0.0.vir.exe
Size

134KB
MD5

74c2e99266737e7321f9572f93263a17
SHA1

4bcde2c2213a52394714316281ed8631af1c8cbc
SHA256

1cd004a6d75bc1ebf7d92ddd6af583caad44dd750906e4797460e7e615e777a7
SHA512

2336129b6c722e1f781930b4b1adabe44f1c58269f3ecaa27b0536d166f8488ed5223d2d8fe30eecbe8903a13a7870ade2dc61e521474d06ebfb5770e0836d23

Score

10^/10

evasion trojan persistence

Malware Config

Signatures

Suspicious use of SetThreadContext 1 IoCs

Processes:

chthonic_2.23.0.0.vir.exe

description pid process target process

PID 1636 set thread context of 3712 1636 chthonic_2.23.0.0.vir.exe chthonic_2.23.0.0.vir.exe

description	pid	process	target process
PID 1636 set thread context of 3712	1636	chthonic_2.23.0.0.vir.exe	chthonic_2.23.0.0.vir.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 Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

chthonic_2.23.0.0.vir.exe

pid process

1636 chthonic_2.23.0.0.vir.exe

pid	process
1636	chthonic_2.23.0.0.vir.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

chthonic_2.23.0.0.vir.exechthonic_2.23.0.0.vir.exe

description	pid	process	target process
PID 1636 wrote to memory of 3712	1636	chthonic_2.23.0.0.vir.exe	chthonic_2.23.0.0.vir.exe
PID 1636 wrote to memory of 3712	1636	chthonic_2.23.0.0.vir.exe	chthonic_2.23.0.0.vir.exe
PID 1636 wrote to memory of 3712	1636	chthonic_2.23.0.0.vir.exe	chthonic_2.23.0.0.vir.exe
PID 1636 wrote to memory of 3712	1636	chthonic_2.23.0.0.vir.exe	chthonic_2.23.0.0.vir.exe
PID 1636 wrote to memory of 3712	1636	chthonic_2.23.0.0.vir.exe	chthonic_2.23.0.0.vir.exe
PID 1636 wrote to memory of 3712	1636	chthonic_2.23.0.0.vir.exe	chthonic_2.23.0.0.vir.exe
PID 1636 wrote to memory of 3712	1636	chthonic_2.23.0.0.vir.exe	chthonic_2.23.0.0.vir.exe
PID 3712 wrote to memory of 1788	3712	chthonic_2.23.0.0.vir.exe	msiexec.exe
PID 3712 wrote to memory of 1788	3712	chthonic_2.23.0.0.vir.exe	msiexec.exe
PID 3712 wrote to memory of 1788	3712	chthonic_2.23.0.0.vir.exe	msiexec.exe
PID 3712 wrote to memory of 1788	3712	chthonic_2.23.0.0.vir.exe	msiexec.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

msiexec.exe

pid	process
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe
1788	msiexec.exe

Disables taskbar notifications via registry modification
evasion

Modifies Internet Explorer settings 1 TTPs 6 IoCs

adware spyware

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
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-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Internet Explorer\PhishingFilter	msiexec.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	msiexec.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0"	msiexec.exe
Key created	\REGISTRY\MACHINE\Software\Microsoft\Internet Explorer\PhishingFilter	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\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
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\policies\system	msiexec.exe

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\ReferenceAssembliesc = "C:\\ProgramData\\Reference Assemblies\\ReferenceAssembliesc.exe"	msiexec.exe

C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.0.0.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.0.0.vir.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1636

C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.0.0.vir.exe
"C:\Users\Admin\AppData\Local\Temp\chthonic_2.23.0.0.vir.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3712

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
3⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Modifies Internet Explorer settings
- System policy modification
- Adds policy Run key to start application
PID:1788

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Modify Registry

5

T1112

Disabling Security Tools

2

T1089

Bypass User Account Control

1

T1088

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1788-5-0x0000000000000000-mapping.dmp

Download
memory/3712-2-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/3712-3-0x0000000000402093-mapping.dmp

Download
memory/3712-4-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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