oski | 9b4952dc2d34aba59e87c0c185358a57acb0fd071d63fc2af6c6c9ae8952be37

Analysis

max time kernel
122s
max time network
125s
platform
windows7_x64
resource
win7-en-20211208
submitted
13/01/2022, 10:56

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
RFQ-MA-INV0009-2201-B.exe
Size 565KB
Sample220113-m1ph4shee3
SHA256 9b4952dc2d34aba59e87c0c185358a57acb0fd071d63fc2af6c6c9ae8952be37
MD5 dae2f6f19797a55c1827a8c8a9db8250
SHA1 e944eec3c0ba8b7230501a1cfb2fbf78bb0a0521
SHA512 17d59a6052a805f9d2aa582bb5ae116e5b3be47d0df495fbd1389868035320db6be304bfdc6646793f2beeb3b31da74729858e1a864e5c74cf16b559471aa7ac
MD5 SHA1 SHA512

Score

10^/10

oski infostealer

Malware Config

Extracted

Family

oski

archosk.xyz

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski

Loads dropped DLL 1 IoCs

pid	Process
540	RFQ-MA-INV0009-2201-B.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
760	1864	WerFault.exe	27

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
760	WerFault.exe
760	WerFault.exe
760	WerFault.exe
760	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
760	WerFault.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	760	WerFault.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 540 wrote to memory of 1864	540	RFQ-MA-INV0009-2201-B.exe	27
PID 1864 wrote to memory of 760	1864	RFQ-MA-INV0009-2201-B.exe	28
PID 1864 wrote to memory of 760	1864	RFQ-MA-INV0009-2201-B.exe	28
PID 1864 wrote to memory of 760	1864	RFQ-MA-INV0009-2201-B.exe	28
PID 1864 wrote to memory of 760	1864	RFQ-MA-INV0009-2201-B.exe	28

C:\Users\Admin\AppData\Local\Temp\RFQ-MA-INV0009-2201-B.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ-MA-INV0009-2201-B.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:540
- C:\Users\Admin\AppData\Local\Temp\RFQ-MA-INV0009-2201-B.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ-MA-INV0009-2201-B.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1864
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1864 -s 112
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:760

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/540-53-0x0000000076041000-0x0000000076043000-memory.dmp

Download

memory/760-65-0x0000000000540000-0x0000000000541000-memory.dmp

Download

memory/1864-56-0x00000000001C0000-0x00000000001F8000-memory.dmp

Download

memory/1864-59-0x00000000001C0000-0x00000000001F8000-memory.dmp

Download

memory/1864-62-0x00000000001C0000-0x00000000001F8000-memory.dmp

Download