Malware Analysis Report

2024-10-18 21:03

Sample ID 231222-aj6pvagga7
Target 330ef71ad71267a0eb80fcc149121052
SHA256 70bfeefcd0c266f10aab2e4bd30a5e1e89509db7e6b929531018dc0b3876103f
Tags
oski infostealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

70bfeefcd0c266f10aab2e4bd30a5e1e89509db7e6b929531018dc0b3876103f

Threat Level: Known bad

The file 330ef71ad71267a0eb80fcc149121052 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

2023-12-22 00:15

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 00:15

Reported

2023-12-23 01:02

Platform

win10v2004-20231215-en

Max time kernel

0s

Max time network

107s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\330ef71ad71267a0eb80fcc149121052.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2024 set thread context of 5076 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\330ef71ad71267a0eb80fcc149121052.ps1

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

"{path}"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5076 -ip 5076

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5076 -s 1108

Network

Country Destination Domain Proto
US 8.8.8.8:53 20.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
US 204.79.197.200:443 tcp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qw34qfzf.qmm.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2024-9-0x0000027BFC5F0000-0x0000027BFC612000-memory.dmp

memory/2024-12-0x0000027BF9D40000-0x0000027BF9D50000-memory.dmp

memory/2024-11-0x0000027BF9D40000-0x0000027BF9D50000-memory.dmp

memory/2024-10-0x00007FFB39C30000-0x00007FFB3A6F1000-memory.dmp

memory/2024-13-0x0000027BFC620000-0x0000027BFC62A000-memory.dmp

memory/5076-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2024-18-0x00007FFB39C30000-0x00007FFB3A6F1000-memory.dmp

memory/5076-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/5076-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/5076-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/5076-23-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 00:15

Reported

2023-12-23 01:02

Platform

win7-20231215-en

Max time kernel

122s

Max time network

123s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\330ef71ad71267a0eb80fcc149121052.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2404 set thread context of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe N/A

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2756 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2756 wrote to memory of 2796 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2756 wrote to memory of 2796 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2756 wrote to memory of 2796 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2756 wrote to memory of 2796 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\330ef71ad71267a0eb80fcc149121052.ps1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2756 -s 492

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

"{path}"

Network

N/A

Files

memory/2404-4-0x000000001B790000-0x000000001BA72000-memory.dmp

memory/2404-7-0x0000000002F30000-0x0000000002FB0000-memory.dmp

memory/2404-6-0x0000000001E00000-0x0000000001E08000-memory.dmp

memory/2404-9-0x0000000002F30000-0x0000000002FB0000-memory.dmp

memory/2404-8-0x000007FEF5CD0000-0x000007FEF666D000-memory.dmp

memory/2404-10-0x0000000002F30000-0x0000000002FB0000-memory.dmp

memory/2404-11-0x0000000002F30000-0x0000000002FB0000-memory.dmp

memory/2404-5-0x000007FEF5CD0000-0x000007FEF666D000-memory.dmp

memory/2404-12-0x0000000002960000-0x000000000296A000-memory.dmp

memory/2756-26-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2756-28-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2404-27-0x000007FEF5CD0000-0x000007FEF666D000-memory.dmp

memory/2756-24-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2756-23-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2756-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2756-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2756-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2756-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2756-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2756-30-0x0000000000400000-0x0000000000438000-memory.dmp