Malware Analysis Report

2024-09-22 21:52

Sample ID 240203-q472eadcfk
Target 8c7c82469de5aacc1025699b79718847
SHA256 f5abfba489bfcef9819f0ca20cd54efc779d6091f6462b6083c363636739f41b
Tags
oski infostealer spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

f5abfba489bfcef9819f0ca20cd54efc779d6091f6462b6083c363636739f41b

Threat Level: Known bad

The file 8c7c82469de5aacc1025699b79718847 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

Unsigned PE

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-02-03 13:50

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-03 13:50

Reported

2024-02-03 13:52

Platform

win7-20231129-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe"

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1044 set thread context of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 1044 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 2476 wrote to memory of 2200 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Windows\SysWOW64\WerFault.exe
PID 2476 wrote to memory of 2200 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Windows\SysWOW64\WerFault.exe
PID 2476 wrote to memory of 2200 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Windows\SysWOW64\WerFault.exe
PID 2476 wrote to memory of 2200 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe

"C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe"

C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe

"C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2476 -s 112

Network

N/A

Files

memory/1044-0-0x0000000001380000-0x0000000001480000-memory.dmp

memory/1044-1-0x0000000074990000-0x000000007507E000-memory.dmp

memory/1044-2-0x0000000000AB0000-0x0000000000AF0000-memory.dmp

memory/1044-3-0x0000000000440000-0x0000000000458000-memory.dmp

memory/1044-4-0x0000000074990000-0x000000007507E000-memory.dmp

memory/1044-5-0x0000000000AB0000-0x0000000000AF0000-memory.dmp

memory/1044-6-0x0000000005790000-0x0000000005830000-memory.dmp

memory/1044-7-0x0000000000A60000-0x0000000000A98000-memory.dmp

memory/2476-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2476-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2476-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2476-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2476-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2476-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2476-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2476-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1044-20-0x0000000074990000-0x000000007507E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-03 13:50

Reported

2024-02-03 13:52

Platform

win10v2004-20231222-en

Max time kernel

92s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4756 set thread context of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4756 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe
PID 4756 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe

Processes

C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe

"C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe"

C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe

"C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe"

C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe

"C:\Users\Admin\AppData\Local\Temp\8c7c82469de5aacc1025699b79718847.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 4872 -ip 4872

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4872 -s 1284

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 kckark.xyz udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp

Files

memory/4756-0-0x00000000009E0000-0x0000000000AE0000-memory.dmp

memory/4756-1-0x0000000075330000-0x0000000075AE0000-memory.dmp

memory/4756-2-0x0000000005BA0000-0x0000000006144000-memory.dmp

memory/4756-3-0x00000000054E0000-0x0000000005572000-memory.dmp

memory/4756-4-0x00000000055F0000-0x000000000568C000-memory.dmp

memory/4756-5-0x0000000005840000-0x0000000005850000-memory.dmp

memory/4756-6-0x00000000054C0000-0x00000000054CA000-memory.dmp

memory/4756-7-0x00000000056F0000-0x0000000005708000-memory.dmp

memory/4756-8-0x0000000075330000-0x0000000075AE0000-memory.dmp

memory/4756-9-0x0000000005840000-0x0000000005850000-memory.dmp

memory/4756-10-0x0000000006EE0000-0x0000000006F80000-memory.dmp

memory/4756-11-0x0000000006B60000-0x0000000006B98000-memory.dmp

memory/4872-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4872-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4872-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4756-17-0x0000000075330000-0x0000000075AE0000-memory.dmp

memory/4872-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4872-20-0x0000000000400000-0x0000000000438000-memory.dmp