Malware Analysis Report

2024-10-18 21:02

Sample ID 231222-rx54xabgam
Target c707720b420b128bb25bedfe7b474e1e
SHA256 880f872a96df84217bcca8eb543de65abe9a506cc2df99ee44de801fec9c8b9a
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

880f872a96df84217bcca8eb543de65abe9a506cc2df99ee44de801fec9c8b9a

Threat Level: Known bad

The file c707720b420b128bb25bedfe7b474e1e 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

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-22 14:35

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 14:35

Reported

2023-12-22 18:23

Platform

win7-20231215-en

Max time kernel

120s

Max time network

127s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\c707720b420b128bb25bedfe7b474e1e.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 1924 wrote to memory of 2988 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1924 wrote to memory of 2988 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1924 wrote to memory of 2988 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1924 wrote to memory of 2988 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1924 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 1924 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 1924 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 1924 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 1924 wrote to memory of 2724 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1924 wrote to memory of 2724 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1924 wrote to memory of 2724 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1924 wrote to memory of 2724 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 1924 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 1924 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 1924 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 1924 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 1924 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 1924 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 1924 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 1924 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\c707720b420b128bb25bedfe7b474e1e.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/1924-5-0x000007FEF5B50000-0x000007FEF64ED000-memory.dmp

memory/1924-4-0x000000001B320000-0x000000001B602000-memory.dmp

memory/1924-6-0x00000000025C0000-0x0000000002640000-memory.dmp

memory/1924-8-0x0000000002570000-0x0000000002578000-memory.dmp

memory/1924-9-0x00000000025C0000-0x0000000002640000-memory.dmp

memory/1924-7-0x00000000025C0000-0x0000000002640000-memory.dmp

memory/1924-10-0x000007FEF5B50000-0x000007FEF64ED000-memory.dmp

memory/1924-11-0x00000000025C0000-0x0000000002640000-memory.dmp

memory/1924-12-0x0000000002980000-0x0000000002992000-memory.dmp

memory/1924-13-0x000007FEF5B50000-0x000007FEF64ED000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 14:35

Reported

2023-12-22 18:24

Platform

win10v2004-20231215-en

Max time kernel

140s

Max time network

124s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\c707720b420b128bb25bedfe7b474e1e.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 668 set thread context of 3516 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\c707720b420b128bb25bedfe7b474e1e.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 3516 -ip 3516

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3516 -s 1056

Network

Country Destination Domain Proto
US 8.8.8.8:53 148.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 195.233.44.23.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 16.234.44.23.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.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

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ukvrzzyh.tmo.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/668-0-0x0000024CB6240000-0x0000024CB6262000-memory.dmp

memory/668-10-0x00007FF86C3B0000-0x00007FF86CE71000-memory.dmp

memory/668-11-0x0000024C9D340000-0x0000024C9D350000-memory.dmp

memory/668-12-0x0000024C9D340000-0x0000024C9D350000-memory.dmp

memory/668-13-0x0000024C9D380000-0x0000024C9D392000-memory.dmp

memory/3516-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3516-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/668-18-0x00007FF86C3B0000-0x00007FF86CE71000-memory.dmp

memory/3516-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3516-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3516-23-0x0000000000400000-0x0000000000438000-memory.dmp