0f8de2a116f590ace3a818302d2531af9f3c972816638c92773048c640807acc

General

Target

Reader.lnk
Size

2KB
MD5

66bb9363e23c7ef2d16c89cd654b491e
SHA1

c20e8d536804cf97584eec93d9a89c09541155bc
SHA256

61f36c5ae038faa2b58a9a17b464d01414b4265e46634f353319c471d0a35789
SHA512

b7a751e49218230d574ca9cc4cbbb1995d89798268124b1617889c7558c66902f81fdb77a299edcc6d96452cec81adb76768172710e00c9272d30821ab0089c5

Score

9^/10

defense_evasion discovery execution impact ransomware

Malware Config

Signatures

Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4152	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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	cmd.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	red.exe

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
4644	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4152	powershell.exe
4152	powershell.exe
3292	red.exe
3292	red.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4152	powershell.exe
Token: SeTakeOwnershipPrivilege	3292	red.exe
Token: SeDebugPrivilege	3292	red.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3428 wrote to memory of 4152	3428	cmd.exe	84
PID 3428 wrote to memory of 4152	3428	cmd.exe	84
PID 4152 wrote to memory of 3292	4152	powershell.exe	85
PID 4152 wrote to memory of 3292	4152	powershell.exe	85
PID 4152 wrote to memory of 3292	4152	powershell.exe	85
PID 3292 wrote to memory of 3692	3292	red.exe	90
PID 3292 wrote to memory of 3692	3292	red.exe	90
PID 3292 wrote to memory of 3692	3292	red.exe	90
PID 3292 wrote to memory of 2800	3292	red.exe	92
PID 3292 wrote to memory of 2800	3292	red.exe	92
PID 3292 wrote to memory of 2800	3292	red.exe	92
PID 3292 wrote to memory of 4644	3292	red.exe	94
PID 3292 wrote to memory of 4644	3292	red.exe	94

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Reader.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3428
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden -command start red.exe "1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4152
- - C:\Users\Admin\AppData\Local\Temp\red.exe
    "C:\Users\Admin\AppData\Local\Temp\red.exe" 1
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3292
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c bcdedit /set {current} bootstatuspolicy ignoreallfailures
      4⤵
      System Location Discovery: System Language Discovery
      PID:3692
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c bcdedit /set {current} recoveryenabled no
      4⤵
      System Location Discovery: System Language Discovery
      PID:2800
  - - C:\Windows\system32\vssadmin.exe
      "C:\Windows\sysnative\vssadmin.exe" delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:4644

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Windows Management Instrumentation

1

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

1

T1006

Indicator Removal

2

T1070

File Deletion

2

T1070.004

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2

T1490

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vx3um3cr.bbo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4152-2-0x00007FFB05A93000-0x00007FFB05A95000-memory.dmp

Filesize
8KB

Download
memory/4152-3-0x000001735D630000-0x000001735D652000-memory.dmp

Filesize
136KB

Download
memory/4152-13-0x00007FFB05A90000-0x00007FFB06551000-memory.dmp

Filesize
10.8MB

Download
memory/4152-14-0x00007FFB05A90000-0x00007FFB06551000-memory.dmp

Filesize
10.8MB

Download
memory/4152-17-0x00007FFB05A90000-0x00007FFB06551000-memory.dmp

Filesize
10.8MB

Download

Analysis

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