Malware Analysis Report

2024-10-18 21:02

Sample ID 231222-s17btahffl
Target daf543db36758a68acc7aa0dfe15bed3
SHA256 f20d954062ff2bc2f6d8fb07d6b8393f50ad49510811b386cef7419c295c2a84
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

f20d954062ff2bc2f6d8fb07d6b8393f50ad49510811b386cef7419c295c2a84

Threat Level: Known bad

The file daf543db36758a68acc7aa0dfe15bed3 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 15:36

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 15:36

Reported

2023-12-22 20:16

Platform

win7-20231215-en

Max time kernel

137s

Max time network

174s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\daf543db36758a68acc7aa0dfe15bed3.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2180 set thread context of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe

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 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2180 wrote to memory of 2668 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\daf543db36758a68acc7aa0dfe15bed3.ps1

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/2180-4-0x000000001B2F0000-0x000000001B5D2000-memory.dmp

memory/2180-5-0x0000000002310000-0x0000000002318000-memory.dmp

memory/2180-6-0x000007FEF5D80000-0x000007FEF671D000-memory.dmp

memory/2180-7-0x000007FEF5D80000-0x000007FEF671D000-memory.dmp

memory/2180-8-0x00000000029A0000-0x0000000002A20000-memory.dmp

memory/2180-9-0x00000000029A0000-0x0000000002A20000-memory.dmp

memory/2180-10-0x00000000029A0000-0x0000000002A20000-memory.dmp

memory/2180-11-0x00000000027F0000-0x00000000027FA000-memory.dmp

memory/2668-22-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2668-23-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2668-25-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2180-26-0x000007FEF5D80000-0x000007FEF671D000-memory.dmp

memory/2668-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2668-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2668-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2668-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2668-27-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2668-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2668-28-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 15:36

Reported

2023-12-22 20:15

Platform

win10v2004-20231215-en

Max time kernel

1s

Max time network

104s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\daf543db36758a68acc7aa0dfe15bed3.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4252 set thread context of 5012 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\daf543db36758a68acc7aa0dfe15bed3.ps1

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

"{path}"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 5012 -ip 5012

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5012 -s 652

Network

Country Destination Domain Proto
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 147.177.190.20.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
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 202.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 100.5.17.2.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 174.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 203.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 udp
US 138.91.171.81:80 tcp
VN 103.114.107.28:80 tcp
IE 52.111.236.22:443 tcp
GB 96.17.178.204:80 tcp
GB 96.17.178.204:80 tcp
VN 103.114.107.28:80 tcp
US 138.91.171.81:80 tcp

Files

memory/4252-0-0x00000195F8960000-0x00000195F8982000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4vxtcikq.151.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4252-12-0x00000195F68E0000-0x00000195F68F0000-memory.dmp

memory/4252-11-0x00000195F68E0000-0x00000195F68F0000-memory.dmp

memory/4252-10-0x00007FFE3AF90000-0x00007FFE3BA51000-memory.dmp

memory/5012-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/5012-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4252-19-0x00007FFE3AF90000-0x00007FFE3BA51000-memory.dmp

memory/5012-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/5012-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4252-13-0x00000195F68C0000-0x00000195F68CA000-memory.dmp

memory/5012-21-0x0000000000400000-0x0000000000438000-memory.dmp