Malware Analysis Report

2025-01-03 04:56

Sample ID 220329-vdaqfacegr
Target 5125301224505344.zip
SHA256 ce0d8d812793e69d7f49dc50245fff290b96ee09c1ed936e539fcbff73803afa
Tags
oski infostealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

ce0d8d812793e69d7f49dc50245fff290b96ee09c1ed936e539fcbff73803afa

Threat Level: Known bad

The file 5125301224505344.zip was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-03-29 16:51

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-03-29 16:51

Reported

2022-03-29 16:54

Platform

win7-20220311-en

Max time kernel

4294180s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe"

Signatures

Oski

infostealer oski

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1616 wrote to memory of 1100 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 1100 wrote to memory of 1884 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Windows\SysWOW64\WerFault.exe
PID 1100 wrote to memory of 1884 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Windows\SysWOW64\WerFault.exe
PID 1100 wrote to memory of 1884 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Windows\SysWOW64\WerFault.exe
PID 1100 wrote to memory of 1884 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe

"C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe"

C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe

"C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1100 -s 112

Network

N/A

Files

memory/1616-54-0x0000000001060000-0x0000000001194000-memory.dmp

memory/1616-55-0x0000000000250000-0x000000000025A000-memory.dmp

memory/1616-56-0x00000000081E0000-0x00000000082E2000-memory.dmp

memory/1616-57-0x0000000001000000-0x0000000001038000-memory.dmp

memory/1100-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1100-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1100-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1100-63-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1100-65-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1100-67-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1100-68-0x000000000040717B-mapping.dmp

memory/1100-70-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1884-71-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-29 16:51

Reported

2022-03-29 16:54

Platform

win10v2004-en-20220113

Max time kernel

136s

Max time network

146s

Command Line

"C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe"

Signatures

Oski

infostealer oski

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe
PID 4220 wrote to memory of 4276 N/A C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe

Processes

C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe

"C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe"

C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe

"C:\Users\Admin\AppData\Local\Temp\187b3e46e853a35f219d356fb64d15448d64b8583d609d0305f4fb4d0fdee9e4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4276 -ip 4276

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4276 -s 232

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
US 52.109.12.19:443 tcp
US 20.189.173.10:443 tcp

Files

memory/4220-130-0x0000000000D70000-0x0000000000EA4000-memory.dmp

memory/4220-131-0x0000000005EC0000-0x0000000006464000-memory.dmp

memory/4220-132-0x0000000005850000-0x00000000058E2000-memory.dmp

memory/4220-133-0x00000000058F0000-0x00000000058FA000-memory.dmp

memory/4220-134-0x00000000093D0000-0x000000000946C000-memory.dmp

memory/4276-135-0x0000000000000000-mapping.dmp

memory/4276-136-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4276-137-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4276-138-0x0000000000400000-0x0000000000438000-memory.dmp