Malware Analysis Report

2024-10-18 21:02

Sample ID 231222-qfc65aeffm
Target 9b34346208a422b5f7ddc652713bd405
SHA256 846c3ef5adab25394a7558a2d304c8a50ccef2f6f67485e868868fa481204955
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

846c3ef5adab25394a7558a2d304c8a50ccef2f6f67485e868868fa481204955

Threat Level: Known bad

The file 9b34346208a422b5f7ddc652713bd405 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 13:11

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 13:11

Reported

2023-12-22 14:12

Platform

win7-20231215-en

Max time kernel

119s

Max time network

153s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\9b34346208a422b5f7ddc652713bd405.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\9b34346208a422b5f7ddc652713bd405.ps1

Network

N/A

Files

memory/2828-4-0x000000001B350000-0x000000001B632000-memory.dmp

memory/2828-6-0x000007FEF61A0000-0x000007FEF6B3D000-memory.dmp

memory/2828-7-0x00000000029F0000-0x0000000002A70000-memory.dmp

memory/2828-5-0x0000000001ED0000-0x0000000001ED8000-memory.dmp

memory/2828-8-0x000007FEF61A0000-0x000007FEF6B3D000-memory.dmp

memory/2828-10-0x00000000029F0000-0x0000000002A70000-memory.dmp

memory/2828-9-0x00000000029F0000-0x0000000002A70000-memory.dmp

memory/2828-11-0x00000000029F0000-0x0000000002A70000-memory.dmp

memory/2828-12-0x00000000029F0000-0x0000000002A70000-memory.dmp

memory/2828-13-0x000007FEF61A0000-0x000007FEF6B3D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 13:11

Reported

2023-12-22 14:11

Platform

win10v2004-20231215-en

Max time kernel

140s

Max time network

128s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\9b34346208a422b5f7ddc652713bd405.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4924 set thread context of 4488 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 4924 wrote to memory of 4488 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4924 wrote to memory of 4488 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4924 wrote to memory of 4488 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4924 wrote to memory of 4488 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4924 wrote to memory of 4488 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4924 wrote to memory of 4488 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4924 wrote to memory of 4488 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4924 wrote to memory of 4488 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4924 wrote to memory of 4488 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\9b34346208a422b5f7ddc652713bd405.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 408 -p 4488 -ip 4488

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4488 -s 1104

Network

Country Destination Domain Proto
US 8.8.8.8:53 180.178.17.96.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 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.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

Files

memory/4924-9-0x000002893F450000-0x000002893F472000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vmvhaa04.c4p.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4924-10-0x00007FFECC6E0000-0x00007FFECD1A1000-memory.dmp

memory/4924-11-0x000002893F440000-0x000002893F450000-memory.dmp

memory/4924-12-0x000002893F440000-0x000002893F450000-memory.dmp

memory/4924-13-0x000002893F480000-0x000002893F4A6000-memory.dmp

memory/4924-41-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-39-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-54-0x0000028958620000-0x0000028958621000-memory.dmp

memory/4488-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4488-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4488-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4924-60-0x00007FFECC6E0000-0x00007FFECD1A1000-memory.dmp

memory/4924-56-0x000002893F440000-0x000002893F450000-memory.dmp

memory/4488-55-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4924-53-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-51-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-49-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-47-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-45-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-43-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-37-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-35-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-33-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-31-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-29-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-27-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-25-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-23-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-21-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-19-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-17-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-15-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4924-14-0x000002893F480000-0x000002893F4A0000-memory.dmp

memory/4488-65-0x0000000000400000-0x0000000000438000-memory.dmp