e4acd60d437bb5558843e74e76630975c7bcc479484bbee595e34b8a2644b082

Analysis

max time kernel
151s
max time network
205s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
19-02-2022 07:40

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General

Target

softokn3.dll
Size

141KB
MD5

a2ee53de9167bf0d6c019303b7ca84e5
SHA1

2a3c737fa1157e8483815e98b666408a18c0db42
SHA256

43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083
SHA512

45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

Score

10^/10

Malware Config

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 2460 created 4548 2460 WerFault.exe rundll32.exe

description	pid	process	target process
PID 2460 created 4548	2460	WerFault.exe	rundll32.exe

Drops file in Windows directory 6 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3676 4548 WerFault.exe rundll32.exe

pid	pid_target	process	target process
3676	4548	WerFault.exe	rundll32.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

WerFault.exe

pid process

3676 WerFault.exe
3676 WerFault.exe

pid	process
3676	WerFault.exe
3676	WerFault.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

WerFault.exesvchost.exe

description	pid	process
Token: SeRestorePrivilege	3676	WerFault.exe
Token: SeBackupPrivilege	3676	WerFault.exe
Token: SeShutdownPrivilege	3484	svchost.exe
Token: SeCreatePagefilePrivilege	3484	svchost.exe
Token: SeShutdownPrivilege	3484	svchost.exe
Token: SeCreatePagefilePrivilege	3484	svchost.exe
Token: SeShutdownPrivilege	3484	svchost.exe
Token: SeCreatePagefilePrivilege	3484	svchost.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

rundll32.exeWerFault.exe

description	pid	process	target process
PID 4200 wrote to memory of 4548	4200	rundll32.exe	rundll32.exe
PID 4200 wrote to memory of 4548	4200	rundll32.exe	rundll32.exe
PID 4200 wrote to memory of 4548	4200	rundll32.exe	rundll32.exe
PID 2460 wrote to memory of 4548	2460	WerFault.exe	rundll32.exe
PID 2460 wrote to memory of 4548	2460	WerFault.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\softokn3.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4200

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\softokn3.dll,#1
2⤵
PID:4548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4548 -s 640
3⤵
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3676

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4548 -ip 4548
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:2460

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:3484

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/3484-130-0x0000020C6D530000-0x0000020C6D540000-memory.dmp

Filesize
64KB

Download
memory/3484-131-0x0000020C6D590000-0x0000020C6D5A0000-memory.dmp

Filesize
64KB

Download
memory/3484-132-0x0000020C702A0000-0x0000020C702A4000-memory.dmp

Filesize
16KB

Download