Malware Analysis Report

2024-10-18 21:02

Sample ID 231222-satb9secgm
Target cfa266344b12ad260d806d51e1382f58
SHA256 f0de5dd14a617af32710f1b582bc2b37d7d83fd36039c44fdb5f2c16a52a5f51
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

f0de5dd14a617af32710f1b582bc2b37d7d83fd36039c44fdb5f2c16a52a5f51

Threat Level: Known bad

The file cfa266344b12ad260d806d51e1382f58 was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-22 14:55

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 14:55

Reported

2023-12-22 19:10

Platform

win7-20231215-en

Max time kernel

119s

Max time network

125s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\cfa266344b12ad260d806d51e1382f58.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\cfa266344b12ad260d806d51e1382f58.ps1

Network

N/A

Files

memory/1988-4-0x000000001B450000-0x000000001B732000-memory.dmp

memory/1988-5-0x000007FEF6150000-0x000007FEF6AED000-memory.dmp

memory/1988-7-0x0000000002050000-0x0000000002058000-memory.dmp

memory/1988-6-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/1988-8-0x000007FEF6150000-0x000007FEF6AED000-memory.dmp

memory/1988-9-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/1988-10-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/1988-11-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/1988-12-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/1988-13-0x000007FEF6150000-0x000007FEF6AED000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 14:55

Reported

2023-12-22 19:10

Platform

win10v2004-20231215-en

Max time kernel

140s

Max time network

123s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\cfa266344b12ad260d806d51e1382f58.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3052 set thread context of 1332 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 3052 wrote to memory of 1332 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3052 wrote to memory of 1332 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3052 wrote to memory of 1332 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3052 wrote to memory of 1332 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3052 wrote to memory of 1332 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3052 wrote to memory of 1332 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3052 wrote to memory of 1332 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3052 wrote to memory of 1332 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3052 wrote to memory of 1332 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\cfa266344b12ad260d806d51e1382f58.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 416 -p 1332 -ip 1332

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1332 -s 1112

Network

Country Destination Domain Proto
US 8.8.8.8:53 146.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.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

Files

memory/3052-8-0x00000205B2F30000-0x00000205B2F40000-memory.dmp

memory/3052-6-0x00007FFA8B6B0000-0x00007FFA8C171000-memory.dmp

memory/3052-0-0x00000205B30A0000-0x00000205B30C2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x0fv5ehn.lv3.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3052-12-0x00000205CB920000-0x00000205CB946000-memory.dmp

memory/3052-38-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-53-0x00000205B30D0000-0x00000205B30D1000-memory.dmp

memory/1332-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1332-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1332-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3052-60-0x00007FFA8B6B0000-0x00007FFA8C171000-memory.dmp

memory/3052-55-0x00000205B2F30000-0x00000205B2F40000-memory.dmp

memory/1332-54-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3052-52-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-50-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-48-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-46-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-44-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-42-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-40-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-36-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-34-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-32-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-30-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-28-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-26-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-24-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-22-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-20-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-18-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-16-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/3052-14-0x00000205CB920000-0x00000205CB940000-memory.dmp

memory/1332-64-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3052-13-0x00000205CB920000-0x00000205CB940000-memory.dmp