oski | 43460a1724b2521dd5e97c68c16edfce9caf22d49452efd956a64db91b5935a7

General

Target

5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe
Size

789KB
MD5

5f0969cdd00801051ff7f2afd2343ff3
SHA1

6bbf42e0b05b025e8162404435eb1b25cc07d5f8
SHA256

43460a1724b2521dd5e97c68c16edfce9caf22d49452efd956a64db91b5935a7
SHA512

0b89a31ae863641dd0b87a7cedb566241e0df84a685f7df73e04c14580b16f80d3042eeaae65a2a09f2772187ff73d0d833f2cfad0663ba4b4a1e8a66c23a9dd
SSDEEP

24576:seV+CQ38aT1m7NKsDTxe1/6hTMLevYWhzDcUjMFA:DV+CQ33T1m70sDTkhYM

Score

10^/10

oski discovery infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

tunqyuindia.com/mar3/

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3528 set thread context of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4892	4176	WerFault.exe	104

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
312	schtasks.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 312	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	102
PID 3528 wrote to memory of 312	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	102
PID 3528 wrote to memory of 312	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	102
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104
PID 3528 wrote to memory of 4176	3528	5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe	104

C:\Users\Admin\AppData\Local\Temp\5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3528
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vTKyEeK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5BF6.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:312
- C:\Users\Admin\AppData\Local\Temp\5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\5f0969cdd00801051ff7f2afd2343ff3_JaffaCakes118.exe"
  2⤵
  PID:4176
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4176 -s 1308
    3⤵
    - Program crash
    PID:4892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4176 -ip 4176
1⤵
PID:2152

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp5BF6.tmp

Filesize
1KB

MD5
55a951cad93f7c6325365b66a5edd0cd

SHA1
13e93490ab8fd108732beea565f92a4cd570555a

SHA256
208930f75ce72db76996dadeda26bf384ce65d274b619b766e798d94f87d8102

SHA512
e7738d81afabb6c16fe544051381cc79158a28b4d076640549476f4e71168a7c936b87eb557024e78a63a66f1ace5e74e0b0e5fc892c06741007c1f25f22b999

Download Submit
memory/3528-10-0x0000000074F5E000-0x0000000074F5F000-memory.dmp

Filesize
4KB

Download
memory/3528-1-0x0000000000A40000-0x0000000000B0A000-memory.dmp

Filesize
808KB

Download
memory/3528-3-0x000000000AB00000-0x000000000AB9C000-memory.dmp

Filesize
624KB

Download
memory/3528-4-0x000000000B150000-0x000000000B6F4000-memory.dmp

Filesize
5.6MB

Download
memory/3528-5-0x000000000AA60000-0x000000000AAF2000-memory.dmp

Filesize
584KB

Download
memory/3528-6-0x0000000002E80000-0x0000000002E8A000-memory.dmp

Filesize
40KB

Download
memory/3528-7-0x00000000057D0000-0x0000000005826000-memory.dmp

Filesize
344KB

Download
memory/3528-11-0x0000000074F50000-0x0000000075700000-memory.dmp

Filesize
7.7MB

Download
memory/3528-9-0x0000000006C60000-0x0000000006C76000-memory.dmp

Filesize
88KB

Download
memory/3528-24-0x0000000074F50000-0x0000000075700000-memory.dmp

Filesize
7.7MB

Download
memory/3528-8-0x0000000074F50000-0x0000000075700000-memory.dmp

Filesize
7.7MB

Download
memory/3528-12-0x0000000006C80000-0x0000000006D1C000-memory.dmp

Filesize
624KB

Download
memory/3528-13-0x00000000072B0000-0x00000000072E8000-memory.dmp

Filesize
224KB

Download
memory/3528-2-0x0000000005450000-0x00000000054E0000-memory.dmp

Filesize
576KB

Download
memory/3528-0-0x0000000074F5E000-0x0000000074F5F000-memory.dmp

Filesize
4KB

Download
memory/4176-20-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4176-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4176-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4176-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4176-27-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads