Malware Analysis Report

2025-01-03 04:57

Sample ID 220416-gb33bafcc7
Target FLP_1037850047.pdf
SHA256 a59fbc4f9903ed18c989e87bc83073b463310ffe6c90a43c53400739719d0aae
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

a59fbc4f9903ed18c989e87bc83073b463310ffe6c90a43c53400739719d0aae

Threat Level: Known bad

The file FLP_1037850047.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 05:38

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-16 05:38

Reported

2022-04-16 05:45

Platform

win7-20220414-en

Max time kernel

120s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1944 set thread context of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1944 wrote to memory of 944 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 944 wrote to memory of 740 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 944 wrote to memory of 740 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 944 wrote to memory of 740 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 944 wrote to memory of 740 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

"C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe"

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 944 -s 796

Network

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

Files

memory/1944-54-0x0000000000D70000-0x0000000000DD2000-memory.dmp

memory/1944-55-0x0000000000380000-0x000000000038A000-memory.dmp

memory/1944-56-0x0000000000650000-0x0000000000672000-memory.dmp

memory/944-57-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-60-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-64-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-66-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-67-0x000000000040717B-mapping.dmp

memory/944-69-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-70-0x00000000765C1000-0x00000000765C3000-memory.dmp

memory/944-71-0x0000000000400000-0x0000000000438000-memory.dmp

memory/740-72-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-16 05:38

Reported

2022-04-16 05:44

Platform

win10v2004-20220414-en

Max time kernel

108s

Max time network

99s

Command Line

"C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1016 set thread context of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1016 wrote to memory of 4660 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4660 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4660 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1016 wrote to memory of 4936 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

Processes

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

"C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe"

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4936 -ip 4936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4936 -s 1316

Network

Country Destination Domain Proto
US 8.253.208.113:80 tcp
IE 20.50.73.9:443 tcp
US 8.253.208.113:80 tcp
US 8.253.208.113:80 tcp
US 8.253.208.113:80 tcp
US 34.102.136.180:80 tcp
US 8.8.8.8:53 duiy.xyz udp

Files

memory/1016-130-0x0000000000B00000-0x0000000000B62000-memory.dmp

memory/1016-131-0x0000000005540000-0x00000000055B6000-memory.dmp

memory/1016-132-0x0000000005820000-0x000000000583E000-memory.dmp

memory/4660-133-0x0000000000000000-mapping.dmp

memory/4936-134-0x0000000000000000-mapping.dmp

memory/4936-135-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4936-136-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4936-137-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4936-138-0x0000000000400000-0x0000000000438000-memory.dmp