Malware Analysis Report

2025-01-03 04:55

Sample ID 220421-3x3vbshbd8
Target DFI_0451_587_032.pdf
SHA256 bbd4dd21dde67a96ac02aa9795ce662fa36d4edb90d13f2ffbdeee0d4aea5050
Tags
oski infostealer spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

bbd4dd21dde67a96ac02aa9795ce662fa36d4edb90d13f2ffbdeee0d4aea5050

Threat Level: Known bad

The file DFI_0451_587_032.pdf was found to be: Known bad.

Malicious Activity Summary

oski infostealer spyware stealer

Oski

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-04-21 23:54

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-21 23:54

Reported

2022-04-21 23:57

Platform

win7-20220414-en

Max time kernel

97s

Max time network

110s

Command Line

"C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1884 set thread context of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 1884 wrote to memory of 2024 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe
PID 2024 wrote to memory of 1492 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 2024 wrote to memory of 1492 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 2024 wrote to memory of 1492 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 2024 wrote to memory of 1492 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe

"C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe"

C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe

C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2024 -s 796

Network

Country Destination Domain Proto
US 8.8.8.8:53 vtqt.xyz udp

Files

memory/1884-54-0x0000000000E80000-0x0000000000EE0000-memory.dmp

memory/1884-55-0x00000000002E0000-0x00000000002EA000-memory.dmp

memory/1884-56-0x0000000000390000-0x00000000003B2000-memory.dmp

memory/2024-57-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2024-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2024-60-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2024-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2024-64-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2024-66-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2024-67-0x000000000040717B-mapping.dmp

memory/2024-69-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2024-70-0x0000000075E51000-0x0000000075E53000-memory.dmp

memory/2024-71-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1492-72-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-21 23:54

Reported

2022-04-21 23:57

Platform

win10v2004-20220414-en

Max time kernel

111s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4052 set thread context of 736 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe

"C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe"

C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe

C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 736 -ip 736

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 736 -s 1320

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
US 93.184.220.29:80 tcp
GB 51.104.15.252:443 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
US 204.79.197.203:80 tcp
US 8.8.8.8:53 vtqt.xyz udp

Files

memory/4052-130-0x0000000000760000-0x00000000007C0000-memory.dmp

memory/4052-131-0x00000000051E0000-0x0000000005256000-memory.dmp

memory/4052-132-0x0000000005460000-0x000000000547E000-memory.dmp

memory/736-133-0x0000000000000000-mapping.dmp

memory/736-134-0x0000000000400000-0x0000000000438000-memory.dmp

memory/736-135-0x0000000000400000-0x0000000000438000-memory.dmp

memory/736-136-0x0000000000400000-0x0000000000438000-memory.dmp

memory/736-137-0x0000000000400000-0x0000000000438000-memory.dmp