oski | e32f29fd3d764d021e15bc4d9dfa6b5eadbe466cda03b27903863e03b49efdf1

General

Target

99bbdbd8879083ba521c9198efabe4d9.exe
Size

813KB
MD5

99bbdbd8879083ba521c9198efabe4d9
SHA1

f676ffeee043f5083f946955fb99cb2eaa85ebaa
SHA256

e32f29fd3d764d021e15bc4d9dfa6b5eadbe466cda03b27903863e03b49efdf1
SHA512

5b50c9d39482eba324540dd8130bd76f863c27025600743089a7ac25c8ecd48363a02bc04d6dca357c870ad2c6cc199738a827c5a167d7546d3f6a6defe92e0a
SSDEEP

12288:BGjZ6FArZSoR65AXwgFvuSSrIRW95Qq/+TYkDYFXEqQhSjRuukMBKQ21c4N8Vo7b:ToR6qgnfRFXEVi4QkPw5

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

C2

103.199.16.91/www/

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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	99bbdbd8879083ba521c9198efabe4d9.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 3988 set thread context of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94

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
3688	1292	WerFault.exe	94

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
4656	schtasks.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3988 wrote to memory of 4656	3988	99bbdbd8879083ba521c9198efabe4d9.exe	93
PID 3988 wrote to memory of 4656	3988	99bbdbd8879083ba521c9198efabe4d9.exe	93
PID 3988 wrote to memory of 4656	3988	99bbdbd8879083ba521c9198efabe4d9.exe	93
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94
PID 3988 wrote to memory of 1292	3988	99bbdbd8879083ba521c9198efabe4d9.exe	94

C:\Users\Admin\AppData\Local\Temp\99bbdbd8879083ba521c9198efabe4d9.exe
"C:\Users\Admin\AppData\Local\Temp\99bbdbd8879083ba521c9198efabe4d9.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3988
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JrkCUVwC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9872.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4656
- C:\Users\Admin\AppData\Local\Temp\99bbdbd8879083ba521c9198efabe4d9.exe
  "C:\Users\Admin\AppData\Local\Temp\99bbdbd8879083ba521c9198efabe4d9.exe"
  2⤵
  PID:1292
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1292 -s 1292
    3⤵
    - Program crash
    PID:3688

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1292 -ip 1292
1⤵
PID:4548

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

C:\Users\Admin\AppData\Local\Temp\tmp9872.tmp

Filesize
1KB

MD5
759ce9a2d9aa248a19ce521c8ac27499

SHA1
5c2a1032239b50358feef84dd8b4699419e29a41

SHA256
49e812b1f30db872c0f12a32870489434b02419aff3be9a1adf04e7ce873c348

SHA512
3c49f7fc788680439a7d0e1490d615c9c8299001244122d7a8e134e9b9257ea25b961e467cdee4d764c54a76046cd4f94ea7cf2e2ee494a86ef888e650045d7c

Download Submit
memory/1292-26-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1292-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1292-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1292-20-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1292-18-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1292-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3988-5-0x0000000005320000-0x000000000532A000-memory.dmp

Filesize
40KB

Download
memory/3988-8-0x0000000074490000-0x0000000074C40000-memory.dmp

Filesize
7.7MB

Download
memory/3988-9-0x00000000052C0000-0x00000000052D0000-memory.dmp

Filesize
64KB

Download
memory/3988-10-0x0000000008100000-0x00000000081A2000-memory.dmp

Filesize
648KB

Download
memory/3988-11-0x0000000007EC0000-0x0000000007EF8000-memory.dmp

Filesize
224KB

Download
memory/3988-7-0x0000000005720000-0x000000000573A000-memory.dmp

Filesize
104KB

Download
memory/3988-6-0x0000000007CB0000-0x0000000007D4C000-memory.dmp

Filesize
624KB

Download
memory/3988-0-0x0000000074490000-0x0000000074C40000-memory.dmp

Filesize
7.7MB

Download
memory/3988-4-0x00000000052C0000-0x00000000052D0000-memory.dmp

Filesize
64KB

Download
memory/3988-3-0x0000000005380000-0x0000000005412000-memory.dmp

Filesize
584KB

Download
memory/3988-22-0x0000000074490000-0x0000000074C40000-memory.dmp

Filesize
7.7MB

Download
memory/3988-2-0x0000000005890000-0x0000000005E34000-memory.dmp

Filesize
5.6MB

Download
memory/3988-1-0x0000000000830000-0x0000000000902000-memory.dmp

Filesize
840KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads