Malware Analysis Report

2024-10-18 21:03

Sample ID 231221-ztm3xseefn
Target 08ee3567b7cb389951dd0c9c5f7b8272
SHA256 1d0b1d8fc6831c8851eaeef1468800f8fa4c311f2cc9d365a93490fae5ec392b
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

1d0b1d8fc6831c8851eaeef1468800f8fa4c311f2cc9d365a93490fae5ec392b

Threat Level: Known bad

The file 08ee3567b7cb389951dd0c9c5f7b8272 was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-21 21:00

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-21 21:00

Reported

2023-12-21 21:31

Platform

win7-20231215-en

Max time kernel

135s

Max time network

147s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\08ee3567b7cb389951dd0c9c5f7b8272.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3032 set thread context of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe

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 3032 wrote to memory of 2700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2700 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 3032 wrote to memory of 2720 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\08ee3567b7cb389951dd0c9c5f7b8272.ps1

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe

"{path}"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe

"{path}"

Network

Country Destination Domain Proto
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
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp

Files

memory/3032-4-0x000000001B470000-0x000000001B752000-memory.dmp

memory/3032-5-0x0000000002360000-0x0000000002368000-memory.dmp

memory/3032-6-0x000007FEF5D80000-0x000007FEF671D000-memory.dmp

memory/3032-7-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/3032-9-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/3032-8-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/3032-10-0x000007FEF5D80000-0x000007FEF671D000-memory.dmp

memory/3032-11-0x00000000029B0000-0x0000000002A30000-memory.dmp

memory/3032-12-0x00000000027E0000-0x00000000027EA000-memory.dmp

memory/2720-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2720-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2720-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2720-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2720-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2720-23-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2720-24-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3032-26-0x000007FEF5D80000-0x000007FEF671D000-memory.dmp

memory/2720-27-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2720-28-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2720-29-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-21 21:00

Reported

2023-12-21 21:32

Platform

win10v2004-20231215-en

Max time kernel

134s

Max time network

156s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\08ee3567b7cb389951dd0c9c5f7b8272.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4948 set thread context of 4484 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\08ee3567b7cb389951dd0c9c5f7b8272.ps1

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

"{path}"

Network

Country Destination Domain Proto
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 208.178.17.96.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 11.2.37.23.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
VN 103.114.107.28:80 tcp
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 8.8.8.8:53 150.1.37.23.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 21.236.111.52.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

Files

memory/4948-0-0x00000225FEE50000-0x00000225FEE72000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aenexniz.qjf.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4948-10-0x00007FFE0A640000-0x00007FFE0B101000-memory.dmp

memory/4948-11-0x00000225FF510000-0x00000225FF520000-memory.dmp

memory/4948-12-0x00000225FF510000-0x00000225FF520000-memory.dmp

memory/4948-13-0x000002259BA20000-0x000002259BA2A000-memory.dmp

memory/4484-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4484-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4948-18-0x00007FFE0A640000-0x00007FFE0B101000-memory.dmp

memory/4484-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4484-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4484-21-0x0000000000400000-0x0000000000438000-memory.dmp