Malware Analysis Report

2025-01-03 04:57

Sample ID 220416-f993vafbe8
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

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 use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-04-16 05:35

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-16 05:35

Reported

2022-04-16 05:41

Platform

win10v2004-20220414-en

Max time kernel

58s

Max time network

74s

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 3876 set thread context of 2004 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 360 -p 2004 -ip 2004

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2004 -s 1332

Network

Country Destination Domain Proto
US 8.253.135.241:80 tcp
US 20.189.173.12:443 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp
NL 178.79.208.1:80 tcp
US 8.8.8.8:53 vtqt.xyz udp

Files

memory/3876-130-0x00000000004B0000-0x0000000000510000-memory.dmp

memory/3876-131-0x0000000004F70000-0x0000000004FE6000-memory.dmp

memory/3876-132-0x0000000004E90000-0x0000000004EAE000-memory.dmp

memory/2004-133-0x0000000000000000-mapping.dmp

memory/2004-134-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2004-135-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2004-136-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2004-137-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-16 05:35

Reported

2022-04-16 05:40

Platform

win7-20220414-en

Max time kernel

103s

Max time network

105s

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 2032 set thread context of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 2032 wrote to memory of 1612 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 1612 wrote to memory of 1936 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 1612 wrote to memory of 1936 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 1612 wrote to memory of 1936 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 1612 wrote to memory of 1936 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 1612 -s 800

Network

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

Files

memory/2032-54-0x0000000000E30000-0x0000000000E90000-memory.dmp

memory/2032-55-0x0000000000510000-0x000000000051A000-memory.dmp

memory/2032-56-0x00000000006E0000-0x0000000000702000-memory.dmp

memory/2032-57-0x0000000075221000-0x0000000075223000-memory.dmp

memory/1612-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1612-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1612-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1612-63-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1612-65-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1612-68-0x000000000040717B-mapping.dmp

memory/1612-67-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1612-70-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1612-72-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1936-73-0x0000000000000000-mapping.dmp