oski | 1ede253254b0e22fe2178db8cf7ee8249083c98178156e8500c8a87e588158f9

General

Target

1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe
Size

323KB
MD5

d16246db1c3abce64bcb4ed32fd151fd
SHA1

7ba1ce14c3e2061bbb03022ca62a847b7aff3d4c
SHA256

1ede253254b0e22fe2178db8cf7ee8249083c98178156e8500c8a87e588158f9
SHA512

8a5d16b6dd3314a7923bac538c878122ec81f376d6deeaa5a06eb9f8bfa7b04a44c6b62cc8b221ccb890cc521e9f9596e4ec818da8ddb3e4baf0bf814caca5f4

Score

10^/10

oski infostealer spyware stealer suricata

Malware Config

Extracted

Family

oski

C2

castroseguranca.com.br

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata

Loads dropped DLL 2 IoCs

pid	Process
1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe
1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.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 1668 set thread context of 1488	1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	28

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
1632	1488	WerFault.exe	28

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe
1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe
1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe
1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 1488	1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	28
PID 1668 wrote to memory of 1488	1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	28
PID 1668 wrote to memory of 1488	1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	28
PID 1668 wrote to memory of 1488	1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	28
PID 1668 wrote to memory of 1488	1668	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	28
PID 1488 wrote to memory of 1632	1488	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	31
PID 1488 wrote to memory of 1632	1488	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	31
PID 1488 wrote to memory of 1632	1488	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	31
PID 1488 wrote to memory of 1632	1488	1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe	31

C:\Users\Admin\AppData\Local\Temp\1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe
"C:\Users\Admin\AppData\Local\Temp\1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Users\Admin\AppData\Local\Temp\1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe
  "C:\Users\Admin\AppData\Local\Temp\1EDE253254B0E22FE2178DB8CF7EE8249083C98178156.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1488
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1488 -s 960
    3⤵
    - Program crash
    PID:1632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\nsoEF42.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
\Users\Admin\AppData\Local\Temp\nsoEF42.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
memory/1488-59-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1488-61-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1668-54-0x00000000762C1000-0x00000000762C3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing