Malware Analysis Report

2024-10-18 21:03

Sample ID 231222-e7yflafgd8
Target 653a032aee2b9a31a8610954e5c28402
SHA256 2d759eacd3f7849f5c1bab822e4355dcc3ed418cf0640b180f0f74379f4f627b
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

2d759eacd3f7849f5c1bab822e4355dcc3ed418cf0640b180f0f74379f4f627b

Threat Level: Known bad

The file 653a032aee2b9a31a8610954e5c28402 was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Program crash

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-22 04:35

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 04:35

Reported

2023-12-23 08:35

Platform

win7-20231215-en

Max time kernel

119s

Max time network

120s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\653a032aee2b9a31a8610954e5c28402.ps1

Signatures

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

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\653a032aee2b9a31a8610954e5c28402.ps1

Network

N/A

Files

memory/1716-4-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

memory/1716-5-0x0000000002340000-0x0000000002348000-memory.dmp

memory/1716-6-0x000007FEF5A20000-0x000007FEF63BD000-memory.dmp

memory/1716-7-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1716-8-0x000007FEF5A20000-0x000007FEF63BD000-memory.dmp

memory/1716-9-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1716-10-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1716-11-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1716-12-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1716-13-0x000007FEF5A20000-0x000007FEF63BD000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 04:35

Reported

2023-12-23 08:35

Platform

win10v2004-20231215-en

Max time kernel

147s

Max time network

151s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\653a032aee2b9a31a8610954e5c28402.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1520 set thread context of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 1520 wrote to memory of 644 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\653a032aee2b9a31a8610954e5c28402.ps1

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

#cmd

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 208 -p 644 -ip 644

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 1100

Network

Country Destination Domain Proto
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.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 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.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
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 123.10.44.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_paifudgn.tka.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/1520-9-0x0000028C7C990000-0x0000028C7C9B2000-memory.dmp

memory/1520-10-0x00007FFB21640000-0x00007FFB22101000-memory.dmp

memory/1520-11-0x0000028C7BDF0000-0x0000028C7BE00000-memory.dmp

memory/1520-12-0x0000028C7BDF0000-0x0000028C7BE00000-memory.dmp

memory/1520-13-0x0000028C7BDF0000-0x0000028C7BE00000-memory.dmp

memory/1520-14-0x0000028C7CA00000-0x0000028C7CA26000-memory.dmp

memory/1520-15-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-18-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-16-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-20-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-22-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-24-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-36-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-34-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-48-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-54-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-52-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-55-0x0000028C63810000-0x0000028C63811000-memory.dmp

memory/1520-50-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-46-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-44-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-42-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-40-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-38-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/644-56-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1520-32-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/644-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1520-30-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-28-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-26-0x0000028C7CA00000-0x0000028C7CA20000-memory.dmp

memory/1520-61-0x00007FFB21640000-0x00007FFB22101000-memory.dmp

memory/644-60-0x0000000000400000-0x0000000000438000-memory.dmp

memory/644-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/644-65-0x0000000000400000-0x0000000000438000-memory.dmp