Malware Analysis Report

2024-09-22 21:45

Sample ID 240312-rrc6yaag8s
Target c397c65e36e5f74b61bb8c7f442b445a
SHA256 1ace37875191bb1b5cf5c0c2a566dbc1894c8931f49e4f41bfd9c604e281edd0
Tags
oski infostealer spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1ace37875191bb1b5cf5c0c2a566dbc1894c8931f49e4f41bfd9c604e281edd0

Threat Level: Known bad

The file c397c65e36e5f74b61bb8c7f442b445a 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 behavior: MapViewOfSection

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-03-12 14:25

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-12 14:25

Reported

2024-03-12 14:27

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1356 set thread context of 1328 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe

"C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe"

C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe

"C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1328 -ip 1328

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1328 -s 1336

Network

Country Destination Domain Proto
US 8.8.8.8:53 147.177.190.20.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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 177.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 mazooyaar.ac.ug udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.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 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 199.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 202.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.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 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 174.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 195.178.17.96.in-addr.arpa udp

Files

memory/1356-2-0x0000000077052000-0x0000000077053000-memory.dmp

memory/1356-3-0x0000000000BA0000-0x0000000000BA1000-memory.dmp

memory/1356-4-0x00000000021F0000-0x00000000021F7000-memory.dmp

memory/1328-5-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1328-6-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1328-7-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1328-9-0x0000000077052000-0x0000000077053000-memory.dmp

memory/1328-11-0x00000000004D0000-0x00000000004D1000-memory.dmp

memory/1356-10-0x00000000021F0000-0x00000000021F7000-memory.dmp

memory/1328-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1328-16-0x0000000000400000-0x0000000000434000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-12 14:25

Reported

2024-03-12 14:27

Platform

win7-20240221-en

Max time kernel

140s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2036 set thread context of 1276 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2036 wrote to memory of 1276 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe
PID 2036 wrote to memory of 1276 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe
PID 2036 wrote to memory of 1276 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe
PID 2036 wrote to memory of 1276 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe
PID 2036 wrote to memory of 1276 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe
PID 1276 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Windows\SysWOW64\WerFault.exe
PID 1276 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Windows\SysWOW64\WerFault.exe
PID 1276 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Windows\SysWOW64\WerFault.exe
PID 1276 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe

"C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe"

C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe

"C:\Users\Admin\AppData\Local\Temp\c397c65e36e5f74b61bb8c7f442b445a.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1276 -s 780

Network

Country Destination Domain Proto
US 8.8.8.8:53 mazooyaar.ac.ug udp

Files

memory/2036-2-0x0000000000230000-0x0000000000231000-memory.dmp

memory/2036-3-0x0000000000250000-0x0000000000257000-memory.dmp

memory/1276-4-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2036-6-0x0000000000250000-0x0000000000257000-memory.dmp

memory/1276-7-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1276-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1276-10-0x0000000000230000-0x0000000000231000-memory.dmp

memory/1276-11-0x0000000000400000-0x0000000000434000-memory.dmp

memory/1276-13-0x0000000000400000-0x0000000000434000-memory.dmp

memory/1276-14-0x0000000000400000-0x0000000000438000-memory.dmp