02e038ab4393164f91b8dc9bf2e09ddccde0f4dfef9aac731767b241d4fea47c

General

Target
DHL발송서류- 20180904153201117119330^^PDF.scr
Size 1.0MB
Sample220224-jmlzaadegn
SHA256 02e038ab4393164f91b8dc9bf2e09ddccde0f4dfef9aac731767b241d4fea47c
MD5 b490e1c3a363d84178347203f4a39b20
SHA1 0b4aeaf7f83b7fa9d467126397fb864954be0b8e
SHA512 0c496d2b54e3867df520f22ada64aa0011b939d71611ac9af2728f0b6a94e7b818048e5a12d86f69e24a466af274aaf726a4881dd4c3d3f999e479d47471d864
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2532 created 3280	2532	WerFault.exe	83

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	DHL발송서류- 20180904153201117119330^^PDF.scr

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	WerFault.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1308	3280	WerFault.exe	83

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

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
5052	timeout.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1308	WerFault.exe
1308	WerFault.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3280	DHL발송서류- 20180904153201117119330^^PDF.scr
Token: SeRestorePrivilege	1308	WerFault.exe
Token: SeBackupPrivilege	1308	WerFault.exe
Token: SeBackupPrivilege	1308	WerFault.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3280 wrote to memory of 4868	3280	DHL발송서류- 20180904153201117119330^^PDF.scr	84
PID 3280 wrote to memory of 4868	3280	DHL발송서류- 20180904153201117119330^^PDF.scr	84
PID 3280 wrote to memory of 4868	3280	DHL발송서류- 20180904153201117119330^^PDF.scr	84
PID 4868 wrote to memory of 5052	4868	cmd.exe	86
PID 4868 wrote to memory of 5052	4868	cmd.exe	86
PID 4868 wrote to memory of 5052	4868	cmd.exe	86
PID 2532 wrote to memory of 3280	2532	WerFault.exe	83
PID 2532 wrote to memory of 3280	2532	WerFault.exe	83

C:\Users\Admin\AppData\Local\Temp\DHL발송서류- 20180904153201117119330^^PDF.scr
"C:\Users\Admin\AppData\Local\Temp\DHL발송서류- 20180904153201117119330^^PDF.scr" /S
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3280
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 20
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4868
- - C:\Windows\SysWOW64\timeout.exe
    timeout 20
    3⤵
    - Delays execution with timeout.exe
    PID:5052
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3280 -s 2256
  2⤵
  - Drops file in Windows directory
  - Program crash
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3280 -ip 3280
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:2532

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3280-130-0x0000000000390000-0x000000000049C000-memory.dmp

Download

memory/3280-131-0x000000007506E000-0x000000007506F000-memory.dmp

Download

memory/3280-132-0x0000000004D80000-0x0000000004D81000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads