Malware Analysis Report

2024-09-22 21:51

Sample ID 240125-w62v3acha6
Target 7536b74c17754363799df14fe70d3a92
SHA256 60d1297adb502d942493a794945336aea891d2c321476ef3349ac07726fca7c3
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

60d1297adb502d942493a794945336aea891d2c321476ef3349ac07726fca7c3

Threat Level: Known bad

The file 7536b74c17754363799df14fe70d3a92 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

2024-01-25 18:32

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-25 18:32

Reported

2024-01-25 18:35

Platform

win7-20231129-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1044 set thread context of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1044 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 2704 wrote to memory of 1132 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Windows\SysWOW64\WerFault.exe
PID 2704 wrote to memory of 1132 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Windows\SysWOW64\WerFault.exe
PID 2704 wrote to memory of 1132 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Windows\SysWOW64\WerFault.exe
PID 2704 wrote to memory of 1132 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe

"C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe"

C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe

"C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2704 -s 736

Network

Country Destination Domain Proto
NL 2.56.59.226:80 2.56.59.226 tcp

Files

memory/1044-0-0x0000000001310000-0x000000000140E000-memory.dmp

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

memory/1044-2-0x00000000048A0000-0x00000000048E0000-memory.dmp

memory/1044-3-0x0000000000350000-0x0000000000362000-memory.dmp

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

memory/1044-5-0x00000000048A0000-0x00000000048E0000-memory.dmp

memory/1044-6-0x0000000005790000-0x0000000005832000-memory.dmp

memory/1044-7-0x0000000000460000-0x000000000049A000-memory.dmp

memory/2704-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1044-18-0x0000000074990000-0x000000007507E000-memory.dmp

memory/2704-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2704-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2704-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2704-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2704-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2704-11-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2704-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2704-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2704-21-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-25 18:32

Reported

2024-01-25 18:35

Platform

win10v2004-20231215-en

Max time kernel

135s

Max time network

161s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1408 set thread context of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1408 wrote to memory of 2292 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 2292 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 2292 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe
PID 1408 wrote to memory of 1236 N/A C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe

Processes

C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe

"C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe"

C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe

"C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe"

C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe

"C:\Users\Admin\AppData\Local\Temp\7536b74c17754363799df14fe70d3a92.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 1236 -ip 1236

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1236 -s 1280

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
NL 2.56.59.226:80 2.56.59.226 tcp
US 8.8.8.8:53 226.59.56.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 190.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 89.16.208.104.in-addr.arpa udp

Files

memory/1408-0-0x0000000074AC0000-0x0000000075270000-memory.dmp

memory/1408-1-0x00000000004D0000-0x00000000005CE000-memory.dmp

memory/1408-2-0x0000000005010000-0x00000000050AC000-memory.dmp

memory/1408-3-0x0000000005660000-0x0000000005C04000-memory.dmp

memory/1408-4-0x00000000050B0000-0x0000000005142000-memory.dmp

memory/1408-5-0x0000000004FB0000-0x0000000004FC0000-memory.dmp

memory/1408-6-0x0000000004FD0000-0x0000000004FDA000-memory.dmp

memory/1408-7-0x0000000005300000-0x0000000005356000-memory.dmp

memory/1408-8-0x0000000005190000-0x00000000051A2000-memory.dmp

memory/1408-9-0x0000000074AC0000-0x0000000075270000-memory.dmp

memory/1408-10-0x0000000004FB0000-0x0000000004FC0000-memory.dmp

memory/1408-11-0x0000000006FD0000-0x0000000007072000-memory.dmp

memory/1408-12-0x00000000049F0000-0x0000000004A2A000-memory.dmp

memory/1236-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1236-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1236-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1236-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1408-18-0x0000000074AC0000-0x0000000075270000-memory.dmp

memory/1236-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1236-22-0x0000000000400000-0x0000000000438000-memory.dmp