Malware Analysis Report

2024-10-18 21:03

Sample ID 231222-fgbdtagee3
Target 67b72b574b52873730e274250feef9ed
SHA256 c66d5ae5f1cc7e8a8c0047e51ce2f5a94de960f63ea2107aaf60bebce75fb2bb
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

c66d5ae5f1cc7e8a8c0047e51ce2f5a94de960f63ea2107aaf60bebce75fb2bb

Threat Level: Known bad

The file 67b72b574b52873730e274250feef9ed 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 04:50

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 04:50

Reported

2023-12-23 09:02

Platform

win7-20231215-en

Max time kernel

118s

Max time network

121s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\67b72b574b52873730e274250feef9ed.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2404 set thread context of 2892 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 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2404 wrote to memory of 2892 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
PID 2892 wrote to memory of 2772 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2892 wrote to memory of 2772 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2892 wrote to memory of 2772 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe C:\Windows\SysWOW64\WerFault.exe
PID 2892 wrote to memory of 2772 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\67b72b574b52873730e274250feef9ed.ps1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2892 -s 112

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

"{path}"

Network

N/A

Files

memory/2404-4-0x000000001B260000-0x000000001B542000-memory.dmp

memory/2404-5-0x000007FEF5830000-0x000007FEF61CD000-memory.dmp

memory/2404-6-0x0000000001F70000-0x0000000001FF0000-memory.dmp

memory/2404-8-0x000007FEF5830000-0x000007FEF61CD000-memory.dmp

memory/2404-9-0x0000000001F70000-0x0000000001FF0000-memory.dmp

memory/2404-10-0x0000000001F70000-0x0000000001FF0000-memory.dmp

memory/2404-7-0x0000000001F40000-0x0000000001F48000-memory.dmp

memory/2404-11-0x0000000001F70000-0x0000000001FF0000-memory.dmp

memory/2404-12-0x0000000002770000-0x000000000277A000-memory.dmp

memory/2892-19-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2892-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2892-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2404-23-0x000007FEF5830000-0x000007FEF61CD000-memory.dmp

memory/2892-22-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2892-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2892-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2892-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2892-13-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 04:50

Reported

2023-12-23 09:02

Platform

win10v2004-20231215-en

Max time kernel

157s

Max time network

162s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\67b72b574b52873730e274250feef9ed.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2816 set thread context of 2864 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.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

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\67b72b574b52873730e274250feef9ed.ps1

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

"{path}"

Network

Country Destination Domain Proto
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 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
NL 52.142.223.178:80 tcp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 32.134.221.88.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
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
VN 103.114.107.28:80 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 8.8.8.8:53 174.178.17.96.in-addr.arpa udp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 195.201.50.20.in-addr.arpa udp

Files

memory/2816-0-0x0000025EF0AA0000-0x0000025EF0AC2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_t5elkrw5.rgp.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2816-10-0x00007FF994250000-0x00007FF994D11000-memory.dmp

memory/2816-12-0x0000025ED7BE0000-0x0000025ED7BF0000-memory.dmp

memory/2816-11-0x0000025ED7BE0000-0x0000025ED7BF0000-memory.dmp

memory/2816-13-0x0000025EF0E40000-0x0000025EF0E4A000-memory.dmp

memory/2864-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2864-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2816-19-0x00007FF994250000-0x00007FF994D11000-memory.dmp

memory/2864-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2864-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2864-21-0x0000000000400000-0x0000000000438000-memory.dmp