Malware Analysis Report

2024-09-22 21:53

Sample ID 240319-p9xbescf49
Target d62e7eaa8e9524f1094f2ee37b31c09f
SHA256 6f9991b2dbb68f2cb2f1846a641e54857cc5a1b3f683e7883ac85e3a040987d1
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

6f9991b2dbb68f2cb2f1846a641e54857cc5a1b3f683e7883ac85e3a040987d1

Threat Level: Known bad

The file d62e7eaa8e9524f1094f2ee37b31c09f 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 WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-03-19 13:02

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-19 13:02

Reported

2024-03-19 13:04

Platform

win7-20240221-en

Max time kernel

141s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1864 set thread context of 2496 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1864 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe
PID 1864 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe
PID 1864 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe
PID 1864 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe
PID 1864 wrote to memory of 2496 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe
PID 2496 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Windows\SysWOW64\WerFault.exe
PID 2496 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Windows\SysWOW64\WerFault.exe
PID 2496 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Windows\SysWOW64\WerFault.exe
PID 2496 wrote to memory of 2500 N/A C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe

"C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe"

C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe

"C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2496 -s 768

Network

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

Files

memory/1864-1-0x0000000000090000-0x0000000000190000-memory.dmp

memory/2496-3-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1864-2-0x0000000000220000-0x0000000000222000-memory.dmp

memory/2496-5-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2496-6-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2496-7-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2496-9-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-19 13:02

Reported

2024-03-19 13:04

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe

"C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe"

C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe

"C:\Users\Admin\AppData\Local\Temp\d62e7eaa8e9524f1094f2ee37b31c09f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3956 -ip 3956

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3956 -s 364

Network

Country Destination Domain Proto
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 18.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 90.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 210.178.17.96.in-addr.arpa udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 178.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 64.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 udp

Files

memory/3956-1-0x00000000000A0000-0x00000000001A0000-memory.dmp

memory/3956-2-0x00000000005F0000-0x00000000005F2000-memory.dmp