Malware Analysis Report

2025-01-03 04:59

Sample ID 220421-xt4dssfch5
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 19:09

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-21 19:09

Reported

2022-04-21 19:12

Platform

win7-20220414-en

Max time kernel

93s

Max time network

98s

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 892 set thread context of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 892 wrote to memory of 1048 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 1048 wrote to memory of 1944 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 1048 wrote to memory of 1944 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 1048 wrote to memory of 1944 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 1048 wrote to memory of 1944 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 1048 -s 796

Network

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

Files

memory/892-54-0x00000000002E0000-0x0000000000340000-memory.dmp

memory/892-55-0x00000000001A0000-0x00000000001AA000-memory.dmp

memory/892-56-0x00000000001E0000-0x0000000000202000-memory.dmp

memory/892-57-0x00000000763B1000-0x00000000763B3000-memory.dmp

memory/1048-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1048-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1048-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1048-63-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1048-65-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1048-67-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1048-68-0x000000000040717B-mapping.dmp

memory/1048-70-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1048-72-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1944-73-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-21 19:09

Reported

2022-04-21 19:12

Platform

win10v2004-20220414-en

Max time kernel

148s

Max time network

157s

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 2688 set thread context of 1692 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 408 -p 1692 -ip 1692

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1692 -s 1320

Network

Country Destination Domain Proto
US 52.109.8.20:443 tcp
US 67.24.169.254:80 tcp
GB 51.105.71.137:443 tcp
US 8.8.8.8:53 176.122.125.40.in-addr.arpa udp
US 93.184.220.29:80 tcp
US 67.24.169.254:80 tcp
US 204.79.197.203:80 tcp
US 67.24.169.254:80 tcp
US 67.24.169.254:80 tcp
US 8.8.8.8:53 vtqt.xyz udp
US 8.8.8.8:53 9.9.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.0.2.0.0.0.0.2.0.1.3.0.6.2.ip6.arpa udp

Files

memory/2688-130-0x00000000000A0000-0x0000000000100000-memory.dmp

memory/2688-131-0x0000000004AF0000-0x0000000004B66000-memory.dmp

memory/2688-132-0x0000000004A90000-0x0000000004AAE000-memory.dmp

memory/1692-133-0x0000000000000000-mapping.dmp

memory/1692-134-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1692-135-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1692-136-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1692-137-0x0000000000400000-0x0000000000438000-memory.dmp