a965c7ee5e32a7763ef8e666f12b96699cad180fdd1b8313afaf7177d61d2527

General

Target

skin.exe
Size

21KB
MD5

0dd3173feb2aad3ff8ea4ec119a88640
SHA1

a032af45d2222e34f19728207b7411a443eb8f72
SHA256

a965c7ee5e32a7763ef8e666f12b96699cad180fdd1b8313afaf7177d61d2527
SHA512

5ddd1a92d8c9fc2b7e611285179af418f1b07dd96ebe0f9879403d2e8dc5b2d0ee4911abfa9c23f57da55e0d17165786b2d4c38d1bc7a2faff1873f0ce807052

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

ookscc.exe

pid process

3936 ookscc.exe

pid	process
3936	ookscc.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Windows\ookscc.exe	upx
C:\Windows\ookscc.exe	upx

Drops file in Windows directory 2 IoCs

Processes:

skin.exe

description ioc process

File created C:\Windows\ookscc.exe skin.exe
File opened for modification C:\Windows\ookscc.exe skin.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File created	C:\Windows\ookscc.exe	skin.exe
File opened for modification	C:\Windows\ookscc.exe	skin.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

ookscc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ookscc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	ookscc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

skin.exe

description pid process

Token: SeIncBasePriorityPrivilege 568 skin.exe
Token: SeIncBasePriorityPrivilege 568 skin.exe

description	pid	process
Token: SeIncBasePriorityPrivilege	568	skin.exe
Token: SeIncBasePriorityPrivilege	568	skin.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

skin.exe

description	pid	process	target process
PID 568 wrote to memory of 3148	568	skin.exe	cmd.exe
PID 568 wrote to memory of 3148	568	skin.exe	cmd.exe
PID 568 wrote to memory of 3148	568	skin.exe	cmd.exe
PID 568 wrote to memory of 2980	568	skin.exe	cmd.exe
PID 568 wrote to memory of 2980	568	skin.exe	cmd.exe
PID 568 wrote to memory of 2980	568	skin.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\skin.exe
"C:\Users\Admin\AppData\Local\Temp\skin.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:568
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\skin.exe > nul
  2⤵
  PID:3148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\skin.exe > nul
  2⤵
  PID:2980

C:\Windows\ookscc.exe
C:\Windows\ookscc.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:3936

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\ookscc.exe

MD5
0dd3173feb2aad3ff8ea4ec119a88640

SHA1
a032af45d2222e34f19728207b7411a443eb8f72

SHA256
a965c7ee5e32a7763ef8e666f12b96699cad180fdd1b8313afaf7177d61d2527

SHA512
5ddd1a92d8c9fc2b7e611285179af418f1b07dd96ebe0f9879403d2e8dc5b2d0ee4911abfa9c23f57da55e0d17165786b2d4c38d1bc7a2faff1873f0ce807052

Download Submit
C:\Windows\ookscc.exe

MD5
0dd3173feb2aad3ff8ea4ec119a88640

SHA1
a032af45d2222e34f19728207b7411a443eb8f72

SHA256
a965c7ee5e32a7763ef8e666f12b96699cad180fdd1b8313afaf7177d61d2527

SHA512
5ddd1a92d8c9fc2b7e611285179af418f1b07dd96ebe0f9879403d2e8dc5b2d0ee4911abfa9c23f57da55e0d17165786b2d4c38d1bc7a2faff1873f0ce807052

Download Submit
memory/2980-117-0x0000000000000000-mapping.dmp

Download
memory/3148-116-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads