Malware Analysis Report

2024-10-18 21:03

Sample ID 231222-bd2dlscdb6
Target 3f612a7d13131add2c7480a8f4afc2e2
SHA256 9c91870abd6826a55a3091588a4dd1a06f76517ff5a59905a1247a169ba33581
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

9c91870abd6826a55a3091588a4dd1a06f76517ff5a59905a1247a169ba33581

Threat Level: Known bad

The file 3f612a7d13131add2c7480a8f4afc2e2 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 01:02

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 01:02

Reported

2023-12-23 03:04

Platform

win7-20231215-en

Max time kernel

117s

Max time network

118s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\3f612a7d13131add2c7480a8f4afc2e2.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2304 set thread context of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe N/A

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 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2304 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2660 wrote to memory of 2744 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2660 wrote to memory of 2744 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2660 wrote to memory of 2744 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2660 wrote to memory of 2744 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\3f612a7d13131add2c7480a8f4afc2e2.ps1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2660 -s 112

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe

"{path}"

Network

N/A

Files

memory/2304-4-0x000000001B7D0000-0x000000001BAB2000-memory.dmp

memory/2304-5-0x0000000002860000-0x0000000002868000-memory.dmp

memory/2304-6-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

memory/2304-7-0x0000000002B90000-0x0000000002C10000-memory.dmp

memory/2304-8-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

memory/2304-9-0x0000000002B90000-0x0000000002C10000-memory.dmp

memory/2304-10-0x0000000002B90000-0x0000000002C10000-memory.dmp

memory/2660-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-23-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-20-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2304-24-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

memory/2660-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2304-11-0x0000000002A60000-0x0000000002A6A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 01:02

Reported

2023-12-23 03:04

Platform

win10v2004-20231215-en

Max time kernel

149s

Max time network

143s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\3f612a7d13131add2c7480a8f4afc2e2.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 208 set thread context of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.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 208 wrote to memory of 2068 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 2068 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 2068 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 208 wrote to memory of 4668 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\3f612a7d13131add2c7480a8f4afc2e2.ps1

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

"{path}"

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

"{path}"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4668 -ip 4668

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4668 -s 1104

Network

Country Destination Domain Proto
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 19.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
GB 88.221.134.18:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
GB 88.221.135.211:80 tcp
GB 87.248.205.0:80 tcp
GB 88.221.135.211:80 tcp
GB 88.221.135.211:80 tcp
GB 88.221.135.211:80 tcp
GB 88.221.135.211:80 tcp
GB 88.221.135.211:80 tcp
GB 88.221.135.211:80 tcp
GB 88.221.135.211:80 tcp
GB 88.221.135.211:80 tcp
GB 88.221.135.211:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
GB 96.17.178.174:80 tcp
GB 96.17.178.174:80 tcp
US 8.8.8.8:53 udp
GB 96.17.178.174:80 tcp
GB 96.17.178.174:80 tcp
GB 96.17.178.174:80 tcp
GB 96.17.178.174:80 tcp
GB 96.17.178.174:80 tcp
US 8.8.8.8:53 udp
GB 96.17.178.174:80 tcp
US 8.8.8.8:53 udp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
US 8.8.8.8:53 udp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 204.79.197.200:443 tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp

Files

memory/208-9-0x0000025DB28B0000-0x0000025DB28D2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0xqk4tmv.ice.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/208-12-0x0000025DB25C0000-0x0000025DB25D0000-memory.dmp

memory/208-11-0x0000025DB25C0000-0x0000025DB25D0000-memory.dmp

memory/208-10-0x00007FFA16C40000-0x00007FFA17701000-memory.dmp

memory/4668-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4668-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4668-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/208-18-0x00007FFA16C40000-0x00007FFA17701000-memory.dmp

memory/4668-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/208-13-0x0000025DB2AE0000-0x0000025DB2AEA000-memory.dmp

memory/4668-23-0x0000000000400000-0x0000000000438000-memory.dmp