Malware Analysis Report

2024-10-18 21:03

Sample ID 231222-p8slvacggj
Target 94e73932bf2784e31572c764f982d4d0
SHA256 0bed22946ec72f99934b49d8c96259617e09f598f94c423178425fbe23fa0a80
Tags
oski infostealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

0bed22946ec72f99934b49d8c96259617e09f598f94c423178425fbe23fa0a80

Threat Level: Known bad

The file 94e73932bf2784e31572c764f982d4d0 was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Program crash

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-22 13:00

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 13:00

Reported

2023-12-22 13:33

Platform

win7-20231215-en

Max time kernel

122s

Max time network

129s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\94e73932bf2784e31572c764f982d4d0.ps1

Signatures

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\94e73932bf2784e31572c764f982d4d0.ps1

Network

N/A

Files

memory/2360-4-0x000000001B240000-0x000000001B522000-memory.dmp

memory/2360-6-0x000007FEF5740000-0x000007FEF60DD000-memory.dmp

memory/2360-5-0x0000000002390000-0x0000000002398000-memory.dmp

memory/2360-7-0x00000000029E0000-0x0000000002A60000-memory.dmp

memory/2360-8-0x000007FEF5740000-0x000007FEF60DD000-memory.dmp

memory/2360-9-0x00000000029E0000-0x0000000002A60000-memory.dmp

memory/2360-10-0x00000000029E0000-0x0000000002A60000-memory.dmp

memory/2360-11-0x000007FEF5740000-0x000007FEF60DD000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 13:00

Reported

2023-12-22 13:33

Platform

win10v2004-20231215-en

Max time kernel

132s

Max time network

157s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\94e73932bf2784e31572c764f982d4d0.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2148 set thread context of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2148 wrote to memory of 2376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\94e73932bf2784e31572c764f982d4d0.ps1

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

#cmd

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 2376 -ip 2376

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2376 -s 1100

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 148.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_iabrvw2o.hbs.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2148-9-0x000002B47F0C0000-0x000002B47F0E2000-memory.dmp

memory/2148-12-0x000002B47B140000-0x000002B47B150000-memory.dmp

memory/2148-11-0x000002B47B140000-0x000002B47B150000-memory.dmp

memory/2148-13-0x000002B47B140000-0x000002B47B150000-memory.dmp

memory/2148-10-0x00007FFDF7A10000-0x00007FFDF84D1000-memory.dmp

memory/2148-14-0x000002B47F450000-0x000002B47F476000-memory.dmp

memory/2148-20-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-30-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-34-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-44-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-54-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-52-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2376-60-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2148-61-0x00007FFDF7A10000-0x00007FFDF84D1000-memory.dmp

memory/2376-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2376-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2376-56-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2148-55-0x000002B47F0B0000-0x000002B47F0B1000-memory.dmp

memory/2148-50-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-48-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-46-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-42-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-40-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-38-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-36-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-32-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-28-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-26-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-24-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-22-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-18-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-16-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2148-15-0x000002B47F450000-0x000002B47F470000-memory.dmp

memory/2376-65-0x0000000000400000-0x0000000000438000-memory.dmp