Malware Analysis Report

2025-01-03 04:57

Sample ID 220419-exz7fabgbr
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

2022-04-19 04:19

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-19 04:19

Reported

2022-04-19 04:25

Platform

win7-20220414-en

Max time kernel

115s

Max time network

101s

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 1100 set thread context of 1664 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 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1100 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe
PID 1664 wrote to memory of 1172 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 1664 wrote to memory of 1172 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 1664 wrote to memory of 1172 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 1664 wrote to memory of 1172 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 1664 -s 732

Network

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

Files

memory/1100-54-0x0000000000FB0000-0x0000000001012000-memory.dmp

memory/1100-55-0x00000000003A0000-0x00000000003AA000-memory.dmp

memory/1100-56-0x0000000000580000-0x00000000005A2000-memory.dmp

memory/1664-57-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1664-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1664-60-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1664-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1664-64-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1664-66-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1664-67-0x000000000040717B-mapping.dmp

memory/1664-69-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1664-70-0x0000000075E31000-0x0000000075E33000-memory.dmp

memory/1664-71-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1172-72-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-19 04:19

Reported

2022-04-19 04:25

Platform

win10v2004-20220414-en

Max time kernel

63s

Max time network

131s

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 4768 set thread context of 4392 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
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

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 -pss -s 424 -p 4392 -ip 4392

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4392 -s 1316

Network

Country Destination Domain Proto
NL 104.110.191.133:80 tcp
US 20.189.173.2:443 tcp
US 8.8.8.8:53 duiy.xyz udp
NL 178.79.208.1:80 tcp
NL 178.79.208.1:80 tcp

Files

memory/4768-133-0x0000000000650000-0x00000000006B2000-memory.dmp

memory/4768-134-0x0000000004FD0000-0x0000000005046000-memory.dmp

memory/4768-135-0x0000000004F20000-0x0000000004F3E000-memory.dmp

memory/4392-136-0x0000000000000000-mapping.dmp

memory/4392-137-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4392-138-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4392-139-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4392-140-0x0000000000400000-0x0000000000438000-memory.dmp