Malware Analysis Report

2024-09-22 21:47

Sample ID 240112-pg8hzsgde5
Target 56711d95738034380f8e51d2da4fee41
SHA256 2d510eb788c8dd9ae2f055811888c11b761c6b278bf0fe77e26b2ae5417ab86a
Tags
oski infostealer
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

2d510eb788c8dd9ae2f055811888c11b761c6b278bf0fe77e26b2ae5417ab86a

Threat Level: Known bad

The file 56711d95738034380f8e51d2da4fee41 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 Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-01-12 12:19

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-12 12:19

Reported

2024-01-12 12:21

Platform

win7-20231215-en

Max time kernel

120s

Max time network

123s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\56711d95738034380f8e51d2da4fee41.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 2092 wrote to memory of 3052 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 3052 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 3052 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 3052 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2728 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2728 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2728 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2728 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2328 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2328 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2328 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2328 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2708 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2708 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2708 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2092 wrote to memory of 2708 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\56711d95738034380f8e51d2da4fee41.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/2092-4-0x000000001B280000-0x000000001B562000-memory.dmp

memory/2092-5-0x0000000001EE0000-0x0000000001EE8000-memory.dmp

memory/2092-6-0x000007FEF5C70000-0x000007FEF660D000-memory.dmp

memory/2092-7-0x0000000002A20000-0x0000000002AA0000-memory.dmp

memory/2092-8-0x000007FEF5C70000-0x000007FEF660D000-memory.dmp

memory/2092-11-0x0000000002A20000-0x0000000002AA0000-memory.dmp

memory/2092-10-0x0000000002A20000-0x0000000002AA0000-memory.dmp

memory/2092-9-0x0000000002A20000-0x0000000002AA0000-memory.dmp

memory/2092-12-0x0000000002710000-0x0000000002722000-memory.dmp

memory/2092-13-0x000007FEF5C70000-0x000007FEF660D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-12 12:19

Reported

2024-01-12 12:21

Platform

win10v2004-20231215-en

Max time kernel

139s

Max time network

147s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\56711d95738034380f8e51d2da4fee41.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2652 set thread context of 1148 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\56711d95738034380f8e51d2da4fee41.ps1

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

#cmd

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1148 -ip 1148

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1148 -s 1100

Network

Country Destination Domain Proto
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 22.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.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 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.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

Files

memory/2652-0-0x0000019338D40000-0x0000019338D62000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_utptdaet.3bl.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2652-10-0x00007FFEC3D10000-0x00007FFEC47D1000-memory.dmp

memory/2652-12-0x000001931E5F0000-0x000001931E600000-memory.dmp

memory/2652-11-0x000001931E5F0000-0x000001931E600000-memory.dmp

memory/2652-13-0x0000019338E70000-0x0000019338E82000-memory.dmp

memory/1148-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1148-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2652-18-0x00007FFEC3D10000-0x00007FFEC47D1000-memory.dmp

memory/1148-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1148-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1148-23-0x0000000000400000-0x0000000000438000-memory.dmp