oski | 5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8

General

Target

5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe
Size

3.0MB
MD5

6815c0366e22e0d8ac1fda13b44d7ac0
SHA1

ef475f1100f6c0f64218ed62ae38ffae869206bf
SHA256

5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8
SHA512

e46e5e6e3856bb5af3fed83fcf78756b0b154fee4d5240eb39b7517c2ace45bbe5a74fc36365fd7ca310786f17c579715d958aee84a7ac4255f2b3b1f4135451

Score

10^/10

oski evasion infostealer spyware stealer suricata trojan

Malware Config

Extracted

Family

oski

C2

5.187.7.144

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
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.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

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1032	5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
776	1032	WerFault.exe	26

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1032 wrote to memory of 776	1032	5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe	29
PID 1032 wrote to memory of 776	1032	5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe	29
PID 1032 wrote to memory of 776	1032	5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe	29
PID 1032 wrote to memory of 776	1032	5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe	29

C:\Users\Admin\AppData\Local\Temp\5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe
"C:\Users\Admin\AppData\Local\Temp\5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8.exe"
1⤵
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1032
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1032 -s 764
  2⤵
  - Program crash
  PID:776

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/1032-54-0x00000000758D1000-0x00000000758D3000-memory.dmp

Filesize
8KB

Download
memory/1032-55-0x00000000777E0000-0x0000000077960000-memory.dmp

Filesize
1.5MB

Download
memory/1032-56-0x0000000000400000-0x0000000000B59000-memory.dmp

Filesize
7.3MB

Download
memory/1032-57-0x0000000000400000-0x0000000000B59000-memory.dmp

Filesize
7.3MB

Download
memory/1032-58-0x0000000000400000-0x0000000000B59000-memory.dmp

Filesize
7.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads