e4acd60d437bb5558843e74e76630975c7bcc479484bbee595e34b8a2644b082

Analysis

max time kernel
138s
max time network
206s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
19-02-2022 07:40

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General

Target

nss3.dll
Size

1.2MB
MD5

bfac4e3c5908856ba17d41edcd455a51
SHA1

8eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256

e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA512

2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

Score

10^/10

Malware Config

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 1732 created 4080 1732 WerFault.exe rundll32.exe

description	pid	process	target process
PID 1732 created 4080	1732	WerFault.exe	rundll32.exe

Drops file in Windows directory 6 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
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

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2788 4080 WerFault.exe rundll32.exe

pid	pid_target	process	target process
2788	4080	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

2788 WerFault.exe
2788 WerFault.exe

pid	process
2788	WerFault.exe
2788	WerFault.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

WerFault.exesvchost.exe

description	pid	process
Token: SeRestorePrivilege	2788	WerFault.exe
Token: SeBackupPrivilege	2788	WerFault.exe
Token: SeShutdownPrivilege	3580	svchost.exe
Token: SeCreatePagefilePrivilege	3580	svchost.exe
Token: SeShutdownPrivilege	3580	svchost.exe
Token: SeCreatePagefilePrivilege	3580	svchost.exe
Token: SeShutdownPrivilege	3580	svchost.exe
Token: SeCreatePagefilePrivilege	3580	svchost.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

rundll32.exeWerFault.exe

description	pid	process	target process
PID 1320 wrote to memory of 4080	1320	rundll32.exe	rundll32.exe
PID 1320 wrote to memory of 4080	1320	rundll32.exe	rundll32.exe
PID 1320 wrote to memory of 4080	1320	rundll32.exe	rundll32.exe
PID 1732 wrote to memory of 4080	1732	WerFault.exe	rundll32.exe
PID 1732 wrote to memory of 4080	1732	WerFault.exe	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\nss3.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1320

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\nss3.dll,#1
2⤵
PID:4080

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4080 -s 640
3⤵
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4080 -ip 4080
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:1732

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:3580

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

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Downloads

memory/3580-130-0x00000291BBB60000-0x00000291BBB70000-memory.dmp

Filesize
64KB

Download
memory/3580-131-0x00000291BC2E0000-0x00000291BC2F0000-memory.dmp

Filesize
64KB

Download
memory/3580-132-0x00000291BE7E0000-0x00000291BE7E4000-memory.dmp

Filesize
16KB

Download