oski | b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

General

Target

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
Size

310KB
MD5

f2ad6ac9e0bc7297c13a28f6d6af85a5
SHA1

af31c785efd47081181f8d030b97dca8f372700a
SHA256

b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf
SHA512

22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645
SSDEEP

6144:W5kNQIVGURZU/kb+K8FAZdKPznvNYTAOjjhLnWQvdFCEWPQczgZyKxxlH:W5TQRZUG+KAqdKrvOTnZtVjWPQczsnp

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

timecforgoodnes.ml

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
3316	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\system.js	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4788 set thread context of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4288	3316	WerFault.exe	89

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89
PID 4788 wrote to memory of 3316	4788	b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe	89

C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
"C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4788
- C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe
  "C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe"
  2⤵
  - Executes dropped EXE
  PID:3316
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3316 -s 1316
    3⤵
    - Program crash
    PID:4288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3316 -ip 3316
1⤵
PID:4172

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf.exe

Filesize
310KB

MD5
f2ad6ac9e0bc7297c13a28f6d6af85a5

SHA1
af31c785efd47081181f8d030b97dca8f372700a

SHA256
b6fd01dfdc4bf70cafeba291f6195eb1eb74589ebbbaf8d66f32efbc079d4caf

SHA512
22dba23872534504680cfc78631be8aa5bb7462b293078758aa77663fd09c74ed871b5f230235c7092c2ecc67bc14fe98984d9c80f115f05623797dd1b62f645

Download Submit
memory/3316-135-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3316-137-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3316-138-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3316-140-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3316-141-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4788-132-0x0000000074D40000-0x00000000752F1000-memory.dmp

Filesize
5.7MB

Download
memory/4788-133-0x0000000074D40000-0x00000000752F1000-memory.dmp

Filesize
5.7MB

Download
memory/4788-139-0x0000000074D40000-0x00000000752F1000-memory.dmp

Filesize
5.7MB

Download

Analysis

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