Malware Analysis Report

2024-09-22 21:45

Sample ID 240201-ldngvshbb5
Target 8686fafede5fe7c30d6fe69dc42fa654
SHA256 db22f8a0e715eacf4b2c0341023da4d9e3728a84429518af2ab45ae112dd425a
Tags
oski infostealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

db22f8a0e715eacf4b2c0341023da4d9e3728a84429518af2ab45ae112dd425a

Threat Level: Known bad

The file 8686fafede5fe7c30d6fe69dc42fa654 was found to be: Known bad.

Malicious Activity Summary

oski infostealer

Oski

Suspicious use of SetThreadContext

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-02-01 09:25

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-01 09:25

Reported

2024-02-01 09:27

Platform

win10v2004-20231222-en

Max time kernel

150s

Max time network

149s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\8686fafede5fe7c30d6fe69dc42fa654.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3172 set thread context of 3960 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.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\8686fafede5fe7c30d6fe69dc42fa654.ps1

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

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3960 -ip 3960

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3960 -s 1200

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 192.178.17.96.in-addr.arpa udp
VN 103.99.1.60:80 tcp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
VN 103.99.1.60:80 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
VN 103.99.1.60:80 tcp
US 8.8.8.8:53 200.178.17.96.in-addr.arpa udp
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp
US 8.8.8.8:53 203.178.17.96.in-addr.arpa udp
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp

Files

memory/3172-0-0x0000021DFE8B0000-0x0000021DFE8D2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n0u2btbm.033.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3172-10-0x00007FF8CA8B0000-0x00007FF8CB371000-memory.dmp

memory/3172-11-0x0000021DFF030000-0x0000021DFF040000-memory.dmp

memory/3172-12-0x0000021DFF030000-0x0000021DFF040000-memory.dmp

memory/3172-13-0x0000021D9A5C0000-0x0000021D9A5C8000-memory.dmp

memory/3960-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3960-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3960-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3960-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3172-18-0x00007FF8CA8B0000-0x00007FF8CB371000-memory.dmp

memory/3960-21-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3960-24-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-01 09:25

Reported

2024-02-01 09:27

Platform

win7-20231215-en

Max time kernel

149s

Max time network

149s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\8686fafede5fe7c30d6fe69dc42fa654.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2308 set thread context of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

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 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2308 wrote to memory of 2660 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Processes

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

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\8686fafede5fe7c30d6fe69dc42fa654.ps1

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

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"

Network

Country Destination Domain Proto
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp
VN 103.99.1.60:80 tcp

Files

memory/2308-4-0x000000001B750000-0x000000001BA32000-memory.dmp

memory/2308-6-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

memory/2308-7-0x0000000002CB0000-0x0000000002D30000-memory.dmp

memory/2308-8-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

memory/2308-10-0x0000000002CB0000-0x0000000002D30000-memory.dmp

memory/2308-9-0x0000000002CB0000-0x0000000002D30000-memory.dmp

memory/2308-5-0x0000000002290000-0x0000000002298000-memory.dmp

memory/2308-11-0x00000000028E0000-0x00000000028E8000-memory.dmp

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

memory/2660-22-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2660-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2308-25-0x000007FEF5CC0000-0x000007FEF665D000-memory.dmp

memory/2660-24-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-26-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2660-16-0x0000000000400000-0x0000000000438000-memory.dmp

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

memory/2660-27-0x0000000000400000-0x0000000000438000-memory.dmp