b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0

General

Target

b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe
Size

196KB
MD5

45865a7b63df4f876e067301df5b14ad
SHA1

37ea93a4420028945e8b9e06a7edb2854cd30eb6
SHA256

b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0
SHA512

131498ffe6c25160bcff1b8c63d62731dc3165fecdeb0a82ef9cd39fe181fa9d259ade5fe919b657dca94fbabca8c6349b14321755692af116ea0a0718513077
SSDEEP

3072:1uAkoaXd323AKyXzUiKiJeIMUyJA0jNGgu0CHRf7nOa682EHqNo3m5p:1uAko1yNKiJeIMHBJGg9Cxf7XHwo36

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe

Executes dropped EXE 1 IoCs

pid	Process
1528	wuolay.exe

Loads dropped DLL 2 IoCs

pid	Process
960	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe
960	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\wuolay = "C:\\Users\\Admin\\wuolay.exe /c"	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
960	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
960	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe
1528	wuolay.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 960 wrote to memory of 1528	960	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe	28
PID 960 wrote to memory of 1528	960	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe	28
PID 960 wrote to memory of 1528	960	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe	28
PID 960 wrote to memory of 1528	960	b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe	28

C:\Users\Admin\AppData\Local\Temp\b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe
"C:\Users\Admin\AppData\Local\Temp\b4402239bf264cf894112a70483b6dfaa0bf97029db147dfd3e8fdd9a7e5bdf0.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:960
- C:\Users\Admin\wuolay.exe
  "C:\Users\Admin\wuolay.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1528

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\wuolay.exe

Filesize
196KB

MD5
f431e4df36fb02636c2f913aa734b344

SHA1
6465eee3fe2956e02e54f29e5e03818124e5ab27

SHA256
5668dd638eb1704f75703ff857d31a5f01a56e2fab0fc3fea12838f853037970

SHA512
b092c17ec30d018c38a0894a914df44a44be22c7d38b3fdb500592177dc8a366c1261f402c2cc4f71a2e79a03815272d015518ade02cfdba1de68575b86d2dec

Download Submit
C:\Users\Admin\wuolay.exe

Filesize
196KB

MD5
f431e4df36fb02636c2f913aa734b344

SHA1
6465eee3fe2956e02e54f29e5e03818124e5ab27

SHA256
5668dd638eb1704f75703ff857d31a5f01a56e2fab0fc3fea12838f853037970

SHA512
b092c17ec30d018c38a0894a914df44a44be22c7d38b3fdb500592177dc8a366c1261f402c2cc4f71a2e79a03815272d015518ade02cfdba1de68575b86d2dec

Download Submit
\Users\Admin\wuolay.exe

Filesize
196KB

MD5
f431e4df36fb02636c2f913aa734b344

SHA1
6465eee3fe2956e02e54f29e5e03818124e5ab27

SHA256
5668dd638eb1704f75703ff857d31a5f01a56e2fab0fc3fea12838f853037970

SHA512
b092c17ec30d018c38a0894a914df44a44be22c7d38b3fdb500592177dc8a366c1261f402c2cc4f71a2e79a03815272d015518ade02cfdba1de68575b86d2dec

Download Submit
\Users\Admin\wuolay.exe

Filesize
196KB

MD5
f431e4df36fb02636c2f913aa734b344

SHA1
6465eee3fe2956e02e54f29e5e03818124e5ab27

SHA256
5668dd638eb1704f75703ff857d31a5f01a56e2fab0fc3fea12838f853037970

SHA512
b092c17ec30d018c38a0894a914df44a44be22c7d38b3fdb500592177dc8a366c1261f402c2cc4f71a2e79a03815272d015518ade02cfdba1de68575b86d2dec

Download Submit
memory/960-56-0x00000000753D1000-0x00000000753D3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads