Malware Analysis Report

2025-01-03 04:58

Sample ID 220427-cpvwmsfef3
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

2022-04-27 02:15

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-27 02:15

Reported

2022-04-27 02:18

Platform

win7-20220414-en

Max time kernel

93s

Max time network

97s

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 1224 set thread context of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 1224 wrote to memory of 316 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 316 wrote to memory of 568 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 316 wrote to memory of 568 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 316 wrote to memory of 568 N/A C:\Users\Admin\AppData\Local\Temp\DFI_0451_587_032.exe C:\Windows\SysWOW64\WerFault.exe
PID 316 wrote to memory of 568 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 316 -s 788

Network

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

Files

memory/1224-54-0x0000000000BC0000-0x0000000000C20000-memory.dmp

memory/1224-55-0x0000000000320000-0x000000000032A000-memory.dmp

memory/1224-56-0x0000000000540000-0x0000000000562000-memory.dmp

memory/1224-57-0x0000000076531000-0x0000000076533000-memory.dmp

memory/316-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/316-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/316-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/316-63-0x0000000000400000-0x0000000000438000-memory.dmp

memory/316-65-0x0000000000400000-0x0000000000438000-memory.dmp

memory/316-67-0x0000000000400000-0x0000000000438000-memory.dmp

memory/316-68-0x000000000040717B-mapping.dmp

memory/316-70-0x0000000000400000-0x0000000000438000-memory.dmp

memory/316-72-0x0000000000400000-0x0000000000438000-memory.dmp

memory/568-73-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-27 02:15

Reported

2022-04-27 02:18

Platform

win10v2004-20220414-en

Max time kernel

148s

Max time network

152s

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 4476 set thread context of 3524 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 412 -p 3524 -ip 3524

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3524 -s 1292

Network

Country Destination Domain Proto
BE 8.238.110.126:80 tcp
GB 173.222.211.107:80 tcp
GB 173.222.211.107:80 tcp
BE 8.238.110.126:80 tcp
US 8.238.20.126:80 tcp
BE 8.238.110.126:80 tcp
US 8.8.8.8:53 151.122.125.40.in-addr.arpa udp
IE 13.69.239.72:443 tcp
US 8.238.20.126:80 tcp
US 8.8.8.8:53 vtqt.xyz udp
BE 8.238.110.126:80 tcp
BE 8.238.110.126:80 tcp
NL 104.123.41.162:80 tcp

Files

memory/4476-130-0x0000000000C30000-0x0000000000C90000-memory.dmp

memory/4476-131-0x0000000005630000-0x00000000056A6000-memory.dmp

memory/4476-132-0x0000000005610000-0x000000000562E000-memory.dmp

memory/3524-133-0x0000000000000000-mapping.dmp

memory/3524-134-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3524-135-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3524-136-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3524-137-0x0000000000400000-0x0000000000438000-memory.dmp