Malware Analysis Report

2024-09-22 21:47

Sample ID 240116-ad3e8shcfn
Target 5e70c004a15f9c9dd298b95046feee7f
SHA256 a216b930fa01417a53852559e8a01e7d61aafb04d85fffedc1e81b20822f162d
Tags
oski infostealer
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

a216b930fa01417a53852559e8a01e7d61aafb04d85fffedc1e81b20822f162d

Threat Level: Known bad

The file 5e70c004a15f9c9dd298b95046feee7f was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-01-16 00:06

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-16 00:06

Reported

2024-01-16 00:09

Platform

win10v2004-20231215-en

Max time kernel

150s

Max time network

155s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\5e70c004a15f9c9dd298b95046feee7f.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1060 set thread context of 4204 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.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

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\5e70c004a15f9c9dd298b95046feee7f.ps1

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

#cmd

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4204 -ip 4204

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 21.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 16.234.44.23.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 188.178.17.96.in-addr.arpa udp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 201.201.50.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ldxxe1y0.0pg.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1060-5-0x000001874AD60000-0x000001874AD82000-memory.dmp

memory/1060-12-0x000001874ADC0000-0x000001874ADD0000-memory.dmp

memory/1060-13-0x000001874ADC0000-0x000001874ADD0000-memory.dmp

memory/1060-11-0x000001874ADC0000-0x000001874ADD0000-memory.dmp

memory/1060-10-0x00007FF9D39A0000-0x00007FF9D4461000-memory.dmp

memory/1060-14-0x0000018732870000-0x0000018732882000-memory.dmp

memory/4204-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4204-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4204-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1060-20-0x00007FF9D39A0000-0x00007FF9D4461000-memory.dmp

memory/4204-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4204-22-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-16 00:06

Reported

2024-01-16 00:09

Platform

win7-20231129-en

Max time kernel

119s

Max time network

120s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\5e70c004a15f9c9dd298b95046feee7f.ps1

Signatures

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 1724 wrote to memory of 2012 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 2012 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 2012 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 2012 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1124 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1124 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1124 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1124 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1732 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1732 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1732 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1732 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1472 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1472 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1472 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 1472 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 2536 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 2536 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 2536 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1724 wrote to memory of 2536 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\5e70c004a15f9c9dd298b95046feee7f.ps1

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

#cmd

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

#cmd

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

#cmd

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

#cmd

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

#cmd

Network

N/A

Files

memory/1724-4-0x000000001B700000-0x000000001B9E2000-memory.dmp

memory/1724-6-0x000007FEF5460000-0x000007FEF5DFD000-memory.dmp

memory/1724-7-0x0000000002A30000-0x0000000002AB0000-memory.dmp

memory/1724-5-0x0000000001E70000-0x0000000001E78000-memory.dmp

memory/1724-8-0x000007FEF5460000-0x000007FEF5DFD000-memory.dmp

memory/1724-9-0x0000000002A30000-0x0000000002AB0000-memory.dmp

memory/1724-10-0x0000000002A30000-0x0000000002AB0000-memory.dmp

memory/1724-11-0x0000000002A30000-0x0000000002AB0000-memory.dmp

memory/1724-12-0x00000000029E0000-0x00000000029F2000-memory.dmp

memory/1724-13-0x000007FEF5460000-0x000007FEF5DFD000-memory.dmp