6089e4a823750474f719377f2f4afece486283dc376bc60a17ad3e6dc8c13e0e

General

Target
WanySad.exe
Size 3.1MB
Sample260721-qectzatzfw
SHA256 6089e4a823750474f719377f2f4afece486283dc376bc60a17ad3e6dc8c13e0e
MD5 8503e74e8850882d59024122de47a5a5
SHA1 890fe48d891015e916bccf0c67d2d9b8d668ca5f
SHA512 bac5c1ca2718eb553679e289e59f3870d2f74d13522e4b4f14f844f0f9c4f75af40d30d7483da41fc5b68f6cb04d042591a5df03659cce07c1195616b61ec7b2
SSDEEP 49152:rEOWMWptx+VVMKawLfqQXco65has8JyJjlRW:AMNPP65has8JyJjlRW
TLSH
T18DE5F843A9DB0DE9CED677B8A5C71335A734FD718A291F2BA608C2312D536C4AD1EB10
MD5 SHA1 SHA512 SSDEEP TLSH

Score

9^/10

defense_evasion execution impact persistence 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

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WanySad.exe	WanySad.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WanySad.exe	WanySad.exe

Executes dropped EXE 1 IoCs

pid	Process
3168	Readme.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WanySad.exe"	WanySad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SystemHelper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WanySad.exe"	WanySad.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000\Software\Microsoft\Windows\CurrentVersion\Run\0xRAT = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WanySad.exe"	WanySad.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\WanySad.exe	WanySad.exe
File opened for modification	C:\Windows\system32\WanySad.exe	WanySad.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000\Control Panel\Desktop\Wallpaper = "C:\\Windows\\Temp\\ransom_wallpaper.bmp"	WanySad.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4700	cmd.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
2504	vssadmin.exe

Modifies registry class 7 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000_Classes\ms-settings\shell\open\command\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WanySad.exe"	WanySad.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000_Classes\ms-settings\shell\open\command\DelegateExecute	WanySad.exe
Key deleted	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000_Classes\ms-settings\shell\open\command	WanySad.exe
Key created	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000_Classes\ms-settings\shell\open\command	WanySad.exe
Key created	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000_Classes\ms-settings	WanySad.exe
Key created	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000_Classes\ms-settings\shell	WanySad.exe
Key created	\REGISTRY\USER\S-1-5-21-2824035265-2271499813-2042964211-1000_Classes\ms-settings\shell\open	WanySad.exe

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
3948	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1520	WanySad.exe
1520	WanySad.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2564	vssvc.exe
Token: SeRestorePrivilege	2564	vssvc.exe
Token: SeAuditPrivilege	2564	vssvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 2872	1520	WanySad.exe	81
PID 2872 wrote to memory of 2012	2872	fodhelper.exe	82
PID 1520 wrote to memory of 3948	1520	WanySad.exe	83
PID 1520 wrote to memory of 4700	1520	WanySad.exe	86
PID 4700 wrote to memory of 2504	4700	cmd.exe	88
PID 1520 wrote to memory of 3168	1520	WanySad.exe	92

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

C:\Users\Admin\AppData\Local\Temp\WanySad.exe
"C:\Users\Admin\AppData\Local\Temp\WanySad.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Drops file in System32 directory
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1520
- C:\Windows\System32\fodhelper.exe
  "C:\Windows\System32\fodhelper.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2872
- - C:\Users\Admin\AppData\Local\Temp\WanySad.exe
    "C:\Users\Admin\AppData\Local\Temp\WanySad.exe"
    3⤵
    PID:2012
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /create /tn "SystemUpdate" /tr "C:\Users\Admin\AppData\Local\Temp\WanySad.exe" /sc onlogon /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3948
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c vssadmin delete shadows /all /quiet
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Windows\system32\vssadmin.exe
    vssadmin delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2504
- C:\Users\Admin\Desktop\Readme.exe
  "C:\Users\Admin\Desktop\Readme.exe"
  2⤵
  - Executes dropped EXE
  PID:3168

C:\Users\Admin\AppData\Local\Temp\WanySad.exe
C:\Users\Admin\AppData\Local\Temp\WanySad.exe
1⤵
PID:4048

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2564

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Windows Management Instrumentation

1

T1047

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Direct Volume Access

1

T1006

Indicator Removal

2

T1070

File Deletion

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

1

T1491

Inhibit System Recovery

2

T1490

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Downloads

WanySad.exe

Path C:\Windows\System32\WanySad.exe
Size 3.1MB
SHA256 6089e4a823750474f719377f2f4afece486283dc376bc60a17ad3e6dc8c13e0e
MD5 8503e74e8850882d59024122de47a5a5
SHA1 890fe48d891015e916bccf0c67d2d9b8d668ca5f
SHA512 bac5c1ca2718eb553679e289e59f3870d2f74d13522e4b4f14f844f0f9c4f75af40d30d7483da41fc5b68f6cb04d042591a5df03659cce07c1195616b61ec7b2
SSDEEP 49152:rEOWMWptx+VVMKawLfqQXco65has8JyJjlRW:AMNPP65has8JyJjlRW
TLSH
T18DE5F843A9DB0DE9CED677B8A5C71335A734FD718A291F2BA608C2312D536C4AD1EB10
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1520-79-0x00007FF6C9080000-0x00007FF6C91FB000-memory.dmp

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memory/2012-0-0x00007FF6C9080000-0x00007FF6C91FB000-memory.dmp

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memory/3168-80-0x00007FF714E90000-0x00007FF71500B000-memory.dmp

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memory/4048-68-0x00007FF6C9080000-0x00007FF6C91FB000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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