Malware Analysis Report

2024-10-18 21:03

Sample ID 231220-psc68aabfr
Target b3344d57c132a4ea95c92fd21c597590
SHA256 b5a1a2fbb4786f68248ba11b8780b8c8294ed881fed3c362c54b0560e1cb2018
Tags
oski infostealer spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

b5a1a2fbb4786f68248ba11b8780b8c8294ed881fed3c362c54b0560e1cb2018

Threat Level: Known bad

The file b3344d57c132a4ea95c92fd21c597590 was found to be: Known bad.

Malicious Activity Summary

oski infostealer spyware stealer

Oski

Reads user/profile data of web browsers

Checks computer location settings

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-20 12:35

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-20 12:35

Reported

2023-12-20 12:46

Platform

win7-20231215-en

Max time kernel

122s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2896 set thread context of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2896 wrote to memory of 2664 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\schtasks.exe
PID 2896 wrote to memory of 2664 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\schtasks.exe
PID 2896 wrote to memory of 2664 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\schtasks.exe
PID 2896 wrote to memory of 2664 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\schtasks.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 2896 wrote to memory of 3060 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3060 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\WerFault.exe
PID 3060 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\WerFault.exe
PID 3060 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\WerFault.exe
PID 3060 wrote to memory of 1664 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe

"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YajFFkFQFAik" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA5D.tmp"

C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe

"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3060 -s 868

Network

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

Files

memory/2896-1-0x0000000074E30000-0x000000007551E000-memory.dmp

memory/2896-0-0x0000000000960000-0x00000000009D4000-memory.dmp

memory/2896-2-0x00000000049F0000-0x0000000004A30000-memory.dmp

memory/2896-3-0x0000000000640000-0x0000000000652000-memory.dmp

memory/2896-4-0x0000000074E30000-0x000000007551E000-memory.dmp

memory/2896-5-0x00000000049F0000-0x0000000004A30000-memory.dmp

memory/2896-6-0x00000000050C0000-0x000000000511C000-memory.dmp

memory/3060-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3060-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3060-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3060-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3060-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3060-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/3060-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2896-22-0x0000000074E30000-0x000000007551E000-memory.dmp

memory/3060-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3060-23-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3060-25-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-20 12:35

Reported

2023-12-20 12:47

Platform

win10v2004-20231215-en

Max time kernel

149s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"

Signatures

Oski

infostealer oski

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe N/A

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3316 set thread context of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3316 wrote to memory of 4704 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\schtasks.exe
PID 3316 wrote to memory of 4704 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\schtasks.exe
PID 3316 wrote to memory of 4704 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Windows\SysWOW64\schtasks.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
PID 3316 wrote to memory of 3152 N/A C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe

"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YajFFkFQFAik" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFF6E.tmp"

C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe

"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 204 -p 3152 -ip 3152

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3152 -s 1300

Network

Country Destination Domain Proto
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 20.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 204.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 robbmaterials.xyz udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp

Files

memory/3316-0-0x00000000009F0000-0x0000000000A64000-memory.dmp

memory/3316-1-0x0000000074DD0000-0x0000000075580000-memory.dmp

memory/3316-2-0x0000000005AA0000-0x0000000006044000-memory.dmp

memory/3316-3-0x00000000054F0000-0x0000000005582000-memory.dmp

memory/3316-4-0x0000000005700000-0x0000000005710000-memory.dmp

memory/3316-5-0x0000000005460000-0x000000000546A000-memory.dmp

memory/3316-6-0x00000000057B0000-0x000000000584C000-memory.dmp

memory/3316-7-0x00000000054C0000-0x00000000054D2000-memory.dmp

memory/3316-8-0x0000000074DD0000-0x0000000075580000-memory.dmp

memory/3316-9-0x0000000005700000-0x0000000005710000-memory.dmp

memory/3316-10-0x00000000063A0000-0x00000000063FC000-memory.dmp

memory/3152-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3152-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3152-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3316-20-0x0000000074DD0000-0x0000000075580000-memory.dmp

memory/3152-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3152-24-0x0000000000400000-0x0000000000438000-memory.dmp