Malware Analysis Report

2024-10-18 21:03

Sample ID 231221-zkfbqadfan
Target 05eaa46461a00795419425d575ccee0a
SHA256 ba3283365384e502f10612a39c50d72258b19c9e08818e75430a24dcd32691c4
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

ba3283365384e502f10612a39c50d72258b19c9e08818e75430a24dcd32691c4

Threat Level: Known bad

The file 05eaa46461a00795419425d575ccee0a was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-21 20:46

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-21 20:46

Reported

2023-12-21 21:09

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\05eaa46461a00795419425d575ccee0a.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\05eaa46461a00795419425d575ccee0a.ps1

Network

N/A

Files

memory/2536-4-0x000000001B640000-0x000000001B922000-memory.dmp

memory/2536-6-0x000007FEF5A00000-0x000007FEF639D000-memory.dmp

memory/2536-5-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

memory/2536-7-0x0000000002960000-0x00000000029E0000-memory.dmp

memory/2536-8-0x000007FEF5A00000-0x000007FEF639D000-memory.dmp

memory/2536-9-0x0000000002960000-0x00000000029E0000-memory.dmp

memory/2536-10-0x0000000002960000-0x00000000029E0000-memory.dmp

memory/2536-11-0x0000000002960000-0x00000000029E0000-memory.dmp

memory/2536-12-0x0000000002960000-0x00000000029E0000-memory.dmp

memory/2536-13-0x000007FEF5A00000-0x000007FEF639D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-21 20:46

Reported

2023-12-21 21:10

Platform

win10v2004-20231215-en

Max time kernel

148s

Max time network

152s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\05eaa46461a00795419425d575ccee0a.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1208 set thread context of 2652 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 1208 wrote to memory of 2652 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1208 wrote to memory of 2652 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1208 wrote to memory of 2652 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1208 wrote to memory of 2652 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1208 wrote to memory of 2652 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1208 wrote to memory of 2652 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1208 wrote to memory of 2652 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1208 wrote to memory of 2652 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1208 wrote to memory of 2652 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\05eaa46461a00795419425d575ccee0a.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 188 -p 2652 -ip 2652

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2652 -s 1100

Network

Country Destination Domain Proto
US 8.8.8.8:53 16.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 185.178.17.96.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 81.171.91.138.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 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 167.109.18.2.in-addr.arpa udp
US 138.91.171.81:80 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 28.160.77.104.in-addr.arpa udp
US 8.8.8.8:53 150.1.37.23.in-addr.arpa udp
US 8.8.8.8:53 204.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 206.178.17.96.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sx0nosiy.0qb.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1208-9-0x00000275AE7C0000-0x00000275AE7E2000-memory.dmp

memory/1208-10-0x00007FFF52780000-0x00007FFF53241000-memory.dmp

memory/1208-12-0x0000027595860000-0x0000027595870000-memory.dmp

memory/1208-11-0x0000027595860000-0x0000027595870000-memory.dmp

memory/1208-13-0x00000275AE7F0000-0x00000275AE816000-memory.dmp

memory/1208-21-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-39-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-53-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-56-0x0000027595860000-0x0000027595870000-memory.dmp

memory/2652-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1208-61-0x00007FFF52780000-0x00007FFF53241000-memory.dmp

memory/2652-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2652-60-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2652-55-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1208-54-0x0000027595870000-0x0000027595871000-memory.dmp

memory/1208-51-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-49-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-47-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-45-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-43-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-41-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-37-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-35-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-33-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-31-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-29-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-27-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-25-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-23-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-19-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-17-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-15-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/1208-14-0x00000275AE7F0000-0x00000275AE810000-memory.dmp

memory/2652-65-0x0000000000400000-0x0000000000438000-memory.dmp