oski | e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5

Analysis

max time kernel
225s
max time network
244s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2023 19:42

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General

Target

e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
Size

412KB
MD5

e1f89a0e2ec8b806a92ff573d6e305ab
SHA1

e8183cf8dd1c7cb56e02296f116b65c40270489a
SHA256

e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5
SHA512

b9231220b1be9c2c8bf8bdb88049b60c4634d1c02bc13b05c4f845d7b0436445ab006023bcc74066c89c0f07f8ad179b80e5fa666c3f81583ec482cdc946cf64
SSDEEP

12288:D4osTQRZUG+KAqdKrvOTnZtVj2Pg8zs2:D4J9311Rs2

Score

10^/10

oski infostealer spyware stealer

Malware Config

Extracted

Family

oski

timecforgoodnes.ml

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
4460	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\system.js	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5020 set thread context of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4428	4460	WerFault.exe	80

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80
PID 5020 wrote to memory of 4460	5020	e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe	80

C:\Users\Admin\AppData\Local\Temp\e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
"C:\Users\Admin\AppData\Local\Temp\e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5020
- C:\Users\Admin\AppData\Local\Temp\e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe
  "C:\Users\Admin\AppData\Local\Temp\e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe"
  2⤵
  - Executes dropped EXE
  PID:4460
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4460 -s 1324
    3⤵
    - Program crash
    PID:4428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4460 -ip 4460
1⤵
PID:3880

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5.exe

Filesize
412KB

MD5
e1f89a0e2ec8b806a92ff573d6e305ab

SHA1
e8183cf8dd1c7cb56e02296f116b65c40270489a

SHA256
e423ba7a079fb14c18abd0592a0278db38d71aa3dd70730f557a9036bedd31c5

SHA512
b9231220b1be9c2c8bf8bdb88049b60c4634d1c02bc13b05c4f845d7b0436445ab006023bcc74066c89c0f07f8ad179b80e5fa666c3f81583ec482cdc946cf64

Download Submit
memory/4460-135-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4460-137-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4460-138-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4460-140-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4460-141-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/5020-132-0x0000000075490000-0x0000000075A41000-memory.dmp

Filesize
5.7MB

Download
memory/5020-133-0x0000000075490000-0x0000000075A41000-memory.dmp

Filesize
5.7MB

Download
memory/5020-139-0x0000000075490000-0x0000000075A41000-memory.dmp

Filesize
5.7MB

Download