Malware Analysis Report

2024-10-18 21:02

Sample ID 231222-bgna6acgc8
Target 40b725beab269432755b7015c056a354
SHA256 9e8c7b590d35ec86de9d2f1832c2c5291858d6ed8f07ea195074d2dc6cc523bd
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

9e8c7b590d35ec86de9d2f1832c2c5291858d6ed8f07ea195074d2dc6cc523bd

Threat Level: Known bad

The file 40b725beab269432755b7015c056a354 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 01:07

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 01:07

Reported

2023-12-23 03:13

Platform

win7-20231129-en

Max time kernel

120s

Max time network

120s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\40b725beab269432755b7015c056a354.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\40b725beab269432755b7015c056a354.ps1

Network

N/A

Files

memory/2852-4-0x000000001B660000-0x000000001B942000-memory.dmp

memory/2852-5-0x0000000002050000-0x0000000002058000-memory.dmp

memory/2852-7-0x0000000002E00000-0x0000000002E80000-memory.dmp

memory/2852-6-0x000007FEF5140000-0x000007FEF5ADD000-memory.dmp

memory/2852-10-0x0000000002E00000-0x0000000002E80000-memory.dmp

memory/2852-9-0x0000000002E00000-0x0000000002E80000-memory.dmp

memory/2852-12-0x000007FEF5140000-0x000007FEF5ADD000-memory.dmp

memory/2852-11-0x0000000002E00000-0x0000000002E80000-memory.dmp

memory/2852-8-0x000007FEF5140000-0x000007FEF5ADD000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 01:07

Reported

2023-12-23 03:13

Platform

win10v2004-20231215-en

Max time kernel

143s

Max time network

151s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\40b725beab269432755b7015c056a354.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2956 set thread context of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

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 2956 wrote to memory of 2444 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2444 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2444 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 2956 wrote to memory of 2140 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\40b725beab269432755b7015c056a354.ps1

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

#cmd

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

#cmd

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2140 -ip 2140

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2140 -s 1120

Network

Country Destination Domain Proto
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 149.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 210.143.182.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kfyxs5h3.ri0.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2956-0-0x00000233BC020000-0x00000233BC042000-memory.dmp

memory/2956-11-0x00000233B9EA0000-0x00000233B9EB0000-memory.dmp

memory/2956-10-0x00007FFB516C0000-0x00007FFB52181000-memory.dmp

memory/2956-12-0x00000233B9EA0000-0x00000233B9EB0000-memory.dmp

memory/2956-13-0x00000233B9E80000-0x00000233B9EA6000-memory.dmp

memory/2956-15-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-14-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-21-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-23-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-25-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-29-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-27-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-43-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-49-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-53-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-54-0x00000233A1940000-0x00000233A1941000-memory.dmp

memory/2956-51-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-47-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-45-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-41-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-39-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-37-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-35-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-33-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-31-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-19-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2956-17-0x00000233B9E80000-0x00000233B9EA0000-memory.dmp

memory/2140-55-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2140-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2956-60-0x00007FFB516C0000-0x00007FFB52181000-memory.dmp

memory/2140-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2140-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2140-64-0x0000000000400000-0x0000000000438000-memory.dmp