oski | 8e07cf5e12ed70918b410fdb95fdf6905c191df169df5fdf994daac99c8bd359

General

Target

406171ecbe8c3d96852acef91ec2e6db.exe
Size

571KB
MD5

406171ecbe8c3d96852acef91ec2e6db
SHA1

5fb7a4fc46659b510fbcbb51d9e08bdf08490b62
SHA256

8e07cf5e12ed70918b410fdb95fdf6905c191df169df5fdf994daac99c8bd359
SHA512

d0c472148ded74e627d33f1f1124b9275ba8ab9d2cb1443a88ebfecce57755b7e88d39e77819bbba75dad6cf905ba85e5372ca9341790f56e121263ababf10a3
SSDEEP

12288:B5tM+E02iNv4sxxrMAbU3Sg9r28R1g9lHQI0uS:vbE01usjMMuSg96WIjV

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

fair.le-pearl.com

Signatures

Oski
Oski is an infostealer targeting browser data, crypto wallets.
infostealer oski
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
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2076 set thread context of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30

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
2200	2860	WerFault.exe	30

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2636	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2076	406171ecbe8c3d96852acef91ec2e6db.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2076	406171ecbe8c3d96852acef91ec2e6db.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 2636	2076	406171ecbe8c3d96852acef91ec2e6db.exe	28
PID 2076 wrote to memory of 2636	2076	406171ecbe8c3d96852acef91ec2e6db.exe	28
PID 2076 wrote to memory of 2636	2076	406171ecbe8c3d96852acef91ec2e6db.exe	28
PID 2076 wrote to memory of 2636	2076	406171ecbe8c3d96852acef91ec2e6db.exe	28
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2076 wrote to memory of 2860	2076	406171ecbe8c3d96852acef91ec2e6db.exe	30
PID 2860 wrote to memory of 2200	2860	406171ecbe8c3d96852acef91ec2e6db.exe	32
PID 2860 wrote to memory of 2200	2860	406171ecbe8c3d96852acef91ec2e6db.exe	32
PID 2860 wrote to memory of 2200	2860	406171ecbe8c3d96852acef91ec2e6db.exe	32
PID 2860 wrote to memory of 2200	2860	406171ecbe8c3d96852acef91ec2e6db.exe	32

C:\Users\Admin\AppData\Local\Temp\406171ecbe8c3d96852acef91ec2e6db.exe
"C:\Users\Admin\AppData\Local\Temp\406171ecbe8c3d96852acef91ec2e6db.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YmTlkQcO" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8FC1.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2636
- C:\Users\Admin\AppData\Local\Temp\406171ecbe8c3d96852acef91ec2e6db.exe
  "{path}"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2860
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2860 -s 800
    3⤵
    - Program crash
    PID:2200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8FC1.tmp

Filesize
1KB

MD5
08709ec66d8aa701c84df997d9efab61

SHA1
e718b9d7c15a6a46ffe313531992b54b13becedc

SHA256
1ce4120e86eb44ded1fc5a096ce0229cfd7c255d864971d782827072548f4316

SHA512
8506a5e1e79c6f233ff126c378b44549b52a88681206cf2fa9e9c00fc7d9bbb5130963d1fab47b052c832a1579990ea7d0ca362020222109de615945c8dd2954

Download Submit
memory/2076-0-0x0000000000820000-0x00000000008B6000-memory.dmp

Filesize
600KB

Download
memory/2076-1-0x00000000749E0000-0x00000000750CE000-memory.dmp

Filesize
6.9MB

Download
memory/2076-2-0x0000000000770000-0x00000000007B0000-memory.dmp

Filesize
256KB

Download
memory/2076-3-0x00000000005E0000-0x00000000005E8000-memory.dmp

Filesize
32KB

Download
memory/2076-4-0x00000000749E0000-0x00000000750CE000-memory.dmp

Filesize
6.9MB

Download
memory/2076-5-0x0000000000770000-0x00000000007B0000-memory.dmp

Filesize
256KB

Download
memory/2076-6-0x0000000005080000-0x00000000050FA000-memory.dmp

Filesize
488KB

Download
memory/2076-7-0x00000000020C0000-0x00000000020F8000-memory.dmp

Filesize
224KB

Download
memory/2076-26-0x00000000749E0000-0x00000000750CE000-memory.dmp

Filesize
6.9MB

Download
memory/2860-25-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2860-27-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2860-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2860-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2860-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2860-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2860-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2860-13-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2860-11-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2860-44-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads