Malware Analysis Report

2024-09-22 21:52

Sample ID 240204-zetxxsccaq
Target 9019caf9c14645b88f4c246b16bda29a
SHA256 acadc18004851aa36a37701a59b485f013880cf371a7d9083444b480cf21c3ad
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

acadc18004851aa36a37701a59b485f013880cf371a7d9083444b480cf21c3ad

Threat Level: Known bad

The file 9019caf9c14645b88f4c246b16bda29a 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

2024-02-04 20:38

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-04 20:38

Reported

2024-02-04 20:40

Platform

win10v2004-20231215-en

Max time kernel

141s

Max time network

150s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\9019caf9c14645b88f4c246b16bda29a.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3348 set thread context of 1252 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\9019caf9c14645b88f4c246b16bda29a.ps1

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

#cmd

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 198.178.17.96.in-addr.arpa udp
VN 103.114.107.28:80 tcp
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 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 190.178.17.96.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_swf4h1de.rdb.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3348-9-0x0000021FE2750000-0x0000021FE2772000-memory.dmp

memory/3348-10-0x00007FFCF2710000-0x00007FFCF31D1000-memory.dmp

memory/3348-12-0x0000021FE1D90000-0x0000021FE1DA0000-memory.dmp

memory/3348-11-0x0000021FE1D90000-0x0000021FE1DA0000-memory.dmp

memory/3348-13-0x0000021FE1D90000-0x0000021FE1DA0000-memory.dmp

memory/3348-14-0x0000021FE1D80000-0x0000021FE1D92000-memory.dmp

memory/1252-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1252-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3348-19-0x00007FFCF2710000-0x00007FFCF31D1000-memory.dmp

memory/1252-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1252-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1252-22-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-04 20:38

Reported

2024-02-04 20:40

Platform

win7-20231129-en

Max time kernel

118s

Max time network

118s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\9019caf9c14645b88f4c246b16bda29a.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 1760 wrote to memory of 2732 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2732 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2732 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2732 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2168 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2168 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2168 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2168 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2124 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2124 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2124 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2124 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2572 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2572 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2572 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2572 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2604 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2604 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2604 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1760 wrote to memory of 2604 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\9019caf9c14645b88f4c246b16bda29a.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/1760-4-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

memory/1760-6-0x000007FEF5330000-0x000007FEF5CCD000-memory.dmp

memory/1760-5-0x00000000027E0000-0x00000000027E8000-memory.dmp

memory/1760-7-0x0000000002950000-0x00000000029D0000-memory.dmp

memory/1760-8-0x000007FEF5330000-0x000007FEF5CCD000-memory.dmp

memory/1760-9-0x0000000002950000-0x00000000029D0000-memory.dmp

memory/1760-11-0x0000000002950000-0x00000000029D0000-memory.dmp

memory/1760-10-0x0000000002950000-0x00000000029D0000-memory.dmp

memory/1760-12-0x00000000029E0000-0x00000000029F2000-memory.dmp

memory/1760-13-0x000007FEF5330000-0x000007FEF5CCD000-memory.dmp