Malware Analysis Report

2024-09-22 21:52

Sample ID 240119-n323naddam
Target 678fe2eeaa5398e8366ede0ba83216f7
SHA256 e50457d38e4cd7424a17fa563b9a40c1db3d81a4ad29ffda9a50dad7327ade58
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

e50457d38e4cd7424a17fa563b9a40c1db3d81a4ad29ffda9a50dad7327ade58

Threat Level: Known bad

The file 678fe2eeaa5398e8366ede0ba83216f7 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

2024-01-19 11:56

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-19 11:56

Reported

2024-01-19 11:58

Platform

win7-20231215-en

Max time kernel

119s

Max time network

123s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\678fe2eeaa5398e8366ede0ba83216f7.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 2220 wrote to memory of 2676 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2676 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2676 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2676 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2812 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2812 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2812 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2812 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2096 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2096 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2096 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2096 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2820 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2820 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2820 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 2820 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 3012 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 3012 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 3012 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 2220 wrote to memory of 3012 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\678fe2eeaa5398e8366ede0ba83216f7.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/2220-4-0x000000001B230000-0x000000001B512000-memory.dmp

memory/2220-6-0x000007FEF5AE0000-0x000007FEF647D000-memory.dmp

memory/2220-7-0x0000000002670000-0x00000000026F0000-memory.dmp

memory/2220-8-0x0000000002670000-0x00000000026F0000-memory.dmp

memory/2220-9-0x0000000002670000-0x00000000026F0000-memory.dmp

memory/2220-5-0x0000000001ED0000-0x0000000001ED8000-memory.dmp

memory/2220-10-0x000007FEF5AE0000-0x000007FEF647D000-memory.dmp

memory/2220-11-0x0000000002670000-0x00000000026F0000-memory.dmp

memory/2220-12-0x0000000002340000-0x0000000002352000-memory.dmp

memory/2220-13-0x000007FEF5AE0000-0x000007FEF647D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-19 11:56

Reported

2024-01-19 11:58

Platform

win10v2004-20231215-en

Max time kernel

149s

Max time network

146s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\678fe2eeaa5398e8366ede0ba83216f7.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1036 set thread context of 4904 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\678fe2eeaa5398e8366ede0ba83216f7.ps1

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

#cmd

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4904 -ip 4904

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4904 -s 1224

Network

Country Destination Domain Proto
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 138.91.171.81:80 tcp
US 8.8.8.8:53 217.106.137.52.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 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 187.178.17.96.in-addr.arpa udp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp

Files

memory/1036-9-0x00000286F79C0000-0x00000286F79E2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cgucfihw.0z3.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1036-10-0x00007FFF92DA0000-0x00007FFF93861000-memory.dmp

memory/1036-11-0x00000286F79F0000-0x00000286F7A00000-memory.dmp

memory/1036-12-0x00000286F79F0000-0x00000286F7A00000-memory.dmp

memory/1036-13-0x00000286F9DE0000-0x00000286F9DF2000-memory.dmp

memory/4904-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4904-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1036-18-0x00007FFF92DA0000-0x00007FFF93861000-memory.dmp

memory/4904-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4904-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4904-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4904-24-0x0000000000400000-0x0000000000438000-memory.dmp