Malware Analysis Report

2024-10-18 21:03

Sample ID 231222-ddbt3abde8
Target 56d68b21e189451019367c59f00ee597
SHA256 19b3d1605a53c09fa8a8fc3675c928cb5403bdef1e3bd0b3c4d69f56a06e436d
Tags
oski infostealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

19b3d1605a53c09fa8a8fc3675c928cb5403bdef1e3bd0b3c4d69f56a06e436d

Threat Level: Known bad

The file 56d68b21e189451019367c59f00ee597 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

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-22 02:53

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-22 02:53

Reported

2023-12-23 06:22

Platform

win10v2004-20231215-en

Max time kernel

1s

Max time network

146s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\56d68b21e189451019367c59f00ee597.ps1

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4424 set thread context of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.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 4424 wrote to memory of 1156 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 1156 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 1156 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 4424 wrote to memory of 4348 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\56d68b21e189451019367c59f00ee597.ps1

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

#cmd

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

#cmd

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4348 -ip 4348

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4348 -s 1212

Network

Country Destination Domain Proto
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 5.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
VN 103.114.107.28:80 tcp
US 8.8.8.8:53 14.227.111.52.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 43.58.199.20.in-addr.arpa udp
VN 103.114.107.28:80 tcp
VN 103.114.107.28:80 tcp

Files

memory/4424-0-0x000001DE46A20000-0x000001DE46A42000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_b2fe4uoa.x5c.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4424-12-0x000001DE46A70000-0x000001DE46A80000-memory.dmp

memory/4424-11-0x000001DE46A70000-0x000001DE46A80000-memory.dmp

memory/4424-10-0x00007FFB54700000-0x00007FFB551C1000-memory.dmp

memory/4424-13-0x000001DE46F10000-0x000001DE46F36000-memory.dmp

memory/4424-45-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4348-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4348-62-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4348-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4424-60-0x00007FFB54700000-0x00007FFB551C1000-memory.dmp

memory/4424-58-0x000001DE46A70000-0x000001DE46A80000-memory.dmp

memory/4348-55-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4424-54-0x000001DE46A60000-0x000001DE46A61000-memory.dmp

memory/4424-53-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-51-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-49-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-47-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-43-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-41-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-39-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-37-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-35-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-33-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-31-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-29-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-27-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-25-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-23-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-21-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-19-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-17-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-15-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-14-0x000001DE46F10000-0x000001DE46F30000-memory.dmp

memory/4424-63-0x000001DE46A70000-0x000001DE46A80000-memory.dmp

memory/4348-64-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4348-67-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-22 02:53

Reported

2023-12-23 06:22

Platform

win7-20231215-en

Max time kernel

119s

Max time network

120s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\56d68b21e189451019367c59f00ee597.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\56d68b21e189451019367c59f00ee597.ps1

Network

N/A

Files

memory/2480-4-0x000000001B510000-0x000000001B7F2000-memory.dmp

memory/2480-5-0x00000000029E0000-0x00000000029E8000-memory.dmp

memory/2480-6-0x000007FEF57E0000-0x000007FEF617D000-memory.dmp

memory/2480-7-0x0000000002CB0000-0x0000000002D30000-memory.dmp

memory/2480-8-0x000007FEF57E0000-0x000007FEF617D000-memory.dmp

memory/2480-10-0x0000000002CB0000-0x0000000002D30000-memory.dmp

memory/2480-9-0x0000000002CB0000-0x0000000002D30000-memory.dmp

memory/2480-11-0x0000000002CB0000-0x0000000002D30000-memory.dmp

memory/2480-12-0x000007FEF57E0000-0x000007FEF617D000-memory.dmp