Malware Analysis Report

2025-01-03 04:55

Sample ID 220427-cwes1affd9
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 behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-04-27 02:25

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-27 02:25

Reported

2022-04-27 02:27

Platform

win7-20220414-en

Max time kernel

104s

Max time network

107s

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 600 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 600 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 600 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 600 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 600 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 600 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 600 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 600 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 600 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 600 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 600 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 992 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 944 wrote to memory of 992 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 944 wrote to memory of 992 N/A C:\Users\Admin\AppData\Local\Temp\FLP_1037850047.exe C:\Windows\SysWOW64\WerFault.exe
PID 944 wrote to memory of 992 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 800

Network

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

Files

memory/600-54-0x0000000000D00000-0x0000000000D62000-memory.dmp

memory/600-55-0x00000000002A0000-0x00000000002AA000-memory.dmp

memory/600-56-0x0000000000530000-0x0000000000552000-memory.dmp

memory/600-57-0x0000000075871000-0x0000000075873000-memory.dmp

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

memory/944-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-63-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-65-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-68-0x000000000040717B-mapping.dmp

memory/944-67-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-70-0x0000000000400000-0x0000000000438000-memory.dmp

memory/944-72-0x0000000000400000-0x0000000000438000-memory.dmp

memory/992-73-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-27 02:25

Reported

2022-04-27 02:27

Platform

win10v2004-20220414-en

Max time kernel

143s

Max time network

145s

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 2400 set thread context of 3468 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 408 -p 3468 -ip 3468

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3468 -s 1308

Network

Country Destination Domain Proto
US 67.24.169.254:80 tcp
US 67.24.169.254:80 tcp
US 93.184.220.29:80 tcp
GB 51.105.71.137:443 tcp
US 8.8.8.8:53 106.89.54.20.in-addr.arpa udp
US 8.8.8.8:53 duiy.xyz 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

Files

memory/2400-130-0x0000000000900000-0x0000000000962000-memory.dmp

memory/2400-131-0x0000000005380000-0x00000000053F6000-memory.dmp

memory/2400-132-0x0000000005320000-0x000000000533E000-memory.dmp

memory/3468-133-0x0000000000000000-mapping.dmp

memory/3468-134-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3468-135-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3468-136-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3468-137-0x0000000000400000-0x0000000000438000-memory.dmp