Malware Analysis Report

2024-09-22 21:47

Sample ID 240109-glqvqshedr
Target 4d838fd7586e75e908483b1807bc29a6
SHA256 a34e7c63da647c394b8becde55d6e87bc34e2c934c89b7f23484747a3598fb4c
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

a34e7c63da647c394b8becde55d6e87bc34e2c934c89b7f23484747a3598fb4c

Threat Level: Known bad

The file 4d838fd7586e75e908483b1807bc29a6 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

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-01-09 05:53

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-09 05:53

Reported

2024-01-09 05:56

Platform

win7-20231215-en

Max time kernel

122s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2168 set thread context of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2168 wrote to memory of 2100 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 2100 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Windows\SysWOW64\WerFault.exe
PID 2100 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Windows\SysWOW64\WerFault.exe
PID 2100 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Windows\SysWOW64\WerFault.exe
PID 2100 wrote to memory of 2640 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe

"C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe"

C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe

"C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2100 -s 776

Network

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

Files

memory/2168-0-0x0000000000F00000-0x0000000000FBC000-memory.dmp

memory/2168-1-0x00000000744D0000-0x0000000074BBE000-memory.dmp

memory/2168-2-0x0000000004E40000-0x0000000004E80000-memory.dmp

memory/2168-3-0x0000000000970000-0x0000000000986000-memory.dmp

memory/2168-4-0x00000000744D0000-0x0000000074BBE000-memory.dmp

memory/2168-5-0x0000000004E40000-0x0000000004E80000-memory.dmp

memory/2168-6-0x0000000005EC0000-0x0000000005F62000-memory.dmp

memory/2168-7-0x0000000000EC0000-0x0000000000EF8000-memory.dmp

memory/2100-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-18-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2100-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2168-23-0x00000000744D0000-0x0000000074BBE000-memory.dmp

memory/2100-22-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-24-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-26-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-09 05:53

Reported

2024-01-09 05:56

Platform

win10v2004-20231215-en

Max time kernel

133s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4860 set thread context of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe
PID 4860 wrote to memory of 4440 N/A C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe

"C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe"

C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe

"C:\Users\Admin\AppData\Local\Temp\4d838fd7586e75e908483b1807bc29a6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 4440 -ip 4440

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4440 -s 1296

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 17.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.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 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.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 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 cabvui.xyz udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

memory/4860-0-0x0000000074E20000-0x00000000755D0000-memory.dmp

memory/4860-2-0x0000000005040000-0x00000000050DC000-memory.dmp

memory/4860-1-0x0000000000590000-0x000000000064C000-memory.dmp

memory/4860-3-0x0000000005690000-0x0000000005C34000-memory.dmp

memory/4860-4-0x0000000005180000-0x0000000005212000-memory.dmp

memory/4860-5-0x0000000004FE0000-0x0000000004FF0000-memory.dmp

memory/4860-7-0x0000000005220000-0x0000000005276000-memory.dmp

memory/4860-6-0x00000000050F0000-0x00000000050FA000-memory.dmp

memory/4860-8-0x00000000064E0000-0x00000000064F6000-memory.dmp

memory/4860-9-0x0000000074E20000-0x00000000755D0000-memory.dmp

memory/4860-10-0x0000000004FE0000-0x0000000004FF0000-memory.dmp

memory/4860-11-0x0000000007F50000-0x0000000007FF2000-memory.dmp

memory/4860-12-0x0000000007D40000-0x0000000007D78000-memory.dmp

memory/4440-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4440-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4440-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4440-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4860-18-0x0000000074E20000-0x00000000755D0000-memory.dmp

memory/4440-21-0x0000000000400000-0x0000000000438000-memory.dmp