Malware Analysis Report

2024-09-22 21:50

Sample ID 240205-r6ggxaade5
Target 92444933697fb73b97c1cc1029fd5d90
SHA256 dd292da794d6c9afb8ea5e136c7b23ff61aa913ff2f451fa5c6b268c74714f60
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

dd292da794d6c9afb8ea5e136c7b23ff61aa913ff2f451fa5c6b268c74714f60

Threat Level: Known bad

The file 92444933697fb73b97c1cc1029fd5d90 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 Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-02-05 14:48

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-05 14:48

Reported

2024-02-05 14:50

Platform

win7-20231215-en

Max time kernel

117s

Max time network

117s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\92444933697fb73b97c1cc1029fd5d90.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\92444933697fb73b97c1cc1029fd5d90.ps1

Network

N/A

Files

memory/1948-4-0x000000001B830000-0x000000001BB12000-memory.dmp

memory/1948-6-0x0000000001D10000-0x0000000001D18000-memory.dmp

memory/1948-5-0x000007FEF5AE0000-0x000007FEF647D000-memory.dmp

memory/1948-7-0x0000000002C90000-0x0000000002D10000-memory.dmp

memory/1948-8-0x000007FEF5AE0000-0x000007FEF647D000-memory.dmp

memory/1948-9-0x0000000002C90000-0x0000000002D10000-memory.dmp

memory/1948-10-0x0000000002C90000-0x0000000002D10000-memory.dmp

memory/1948-11-0x0000000002C90000-0x0000000002D10000-memory.dmp

memory/1948-12-0x0000000002C90000-0x0000000002D10000-memory.dmp

memory/1948-13-0x000007FEF5AE0000-0x000007FEF647D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-05 14:48

Reported

2024-02-05 14:50

Platform

win10v2004-20231215-en

Max time kernel

145s

Max time network

150s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\92444933697fb73b97c1cc1029fd5d90.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4120 set thread context of 376 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 4120 wrote to memory of 376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4120 wrote to memory of 376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4120 wrote to memory of 376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4120 wrote to memory of 376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4120 wrote to memory of 376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4120 wrote to memory of 376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4120 wrote to memory of 376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4120 wrote to memory of 376 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4120 wrote to memory of 376 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\92444933697fb73b97c1cc1029fd5d90.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 404 -p 376 -ip 376

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 376 -s 1100

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 20.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 187.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.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_vpwxesua.wb0.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4120-5-0x0000020C20440000-0x0000020C20462000-memory.dmp

memory/4120-11-0x0000020C1E380000-0x0000020C1E390000-memory.dmp

memory/4120-10-0x00007FFC87130000-0x00007FFC87BF1000-memory.dmp

memory/4120-12-0x0000020C1E380000-0x0000020C1E390000-memory.dmp

memory/4120-13-0x0000020C20770000-0x0000020C20796000-memory.dmp

memory/4120-41-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-54-0x0000020C20790000-0x0000020C20791000-memory.dmp

memory/376-55-0x0000000000400000-0x0000000000438000-memory.dmp

memory/376-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/376-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/376-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4120-60-0x00007FFC87130000-0x00007FFC87BF1000-memory.dmp

memory/4120-58-0x0000020C1E380000-0x0000020C1E390000-memory.dmp

memory/4120-53-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-51-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-49-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-47-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-45-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-43-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-39-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-37-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-35-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-33-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-31-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-29-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-27-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-25-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-23-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-21-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-19-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-17-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-15-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/4120-14-0x0000020C20770000-0x0000020C20790000-memory.dmp

memory/376-65-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4120-66-0x0000020C1E380000-0x0000020C1E390000-memory.dmp