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

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-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	406171ecbe8c3d96852acef91ec2e6db.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
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4128 set thread context of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103

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
4136	3192	WerFault.exe	103

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
3556	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4128	406171ecbe8c3d96852acef91ec2e6db.exe
4128	406171ecbe8c3d96852acef91ec2e6db.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4128	406171ecbe8c3d96852acef91ec2e6db.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4128 wrote to memory of 3556	4128	406171ecbe8c3d96852acef91ec2e6db.exe	102
PID 4128 wrote to memory of 3556	4128	406171ecbe8c3d96852acef91ec2e6db.exe	102
PID 4128 wrote to memory of 3556	4128	406171ecbe8c3d96852acef91ec2e6db.exe	102
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103
PID 4128 wrote to memory of 3192	4128	406171ecbe8c3d96852acef91ec2e6db.exe	103

C:\Users\Admin\AppData\Local\Temp\406171ecbe8c3d96852acef91ec2e6db.exe
"C:\Users\Admin\AppData\Local\Temp\406171ecbe8c3d96852acef91ec2e6db.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4128
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YmTlkQcO" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF1C2.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3556
- C:\Users\Admin\AppData\Local\Temp\406171ecbe8c3d96852acef91ec2e6db.exe
  "{path}"
  2⤵
  PID:3192
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3192 -s 1336
    3⤵
    - Program crash
    PID:4136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 3192 -ip 3192
1⤵
PID:3212

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/3192-38-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3192-16-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3192-18-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3192-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3192-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4128-4-0x0000000005710000-0x0000000005720000-memory.dmp

Filesize
64KB

Download
memory/4128-6-0x0000000005CB0000-0x0000000005CB8000-memory.dmp

Filesize
32KB

Download
memory/4128-8-0x0000000074BB0000-0x0000000075360000-memory.dmp

Filesize
7.7MB

Download
memory/4128-9-0x0000000005710000-0x0000000005720000-memory.dmp

Filesize
64KB

Download
memory/4128-10-0x0000000008220000-0x000000000829A000-memory.dmp

Filesize
488KB

Download
memory/4128-11-0x00000000080D0000-0x0000000008108000-memory.dmp

Filesize
224KB

Download
memory/4128-7-0x0000000006930000-0x00000000069CC000-memory.dmp

Filesize
624KB

Download
memory/4128-5-0x00000000058C0000-0x00000000058CA000-memory.dmp

Filesize
40KB

Download
memory/4128-0-0x0000000074BB0000-0x0000000075360000-memory.dmp

Filesize
7.7MB

Download
memory/4128-20-0x0000000074BB0000-0x0000000075360000-memory.dmp

Filesize
7.7MB

Download
memory/4128-3-0x0000000005730000-0x00000000057C2000-memory.dmp

Filesize
584KB

Download
memory/4128-2-0x0000000005CE0000-0x0000000006284000-memory.dmp

Filesize
5.6MB

Download
memory/4128-1-0x0000000000C70000-0x0000000000D06000-memory.dmp

Filesize
600KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads