Malware Analysis Report

2024-10-18 21:03

Sample ID 231219-yg5lrsfcck
Target 887e6a417f06bb6dc94f034935073101
SHA256 096274fd9d732efd99db63e588c529184b5e7c27215eb09e6bab705ddfdc7d01
Tags
upx oski infostealer spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

096274fd9d732efd99db63e588c529184b5e7c27215eb09e6bab705ddfdc7d01

Threat Level: Known bad

The file 887e6a417f06bb6dc94f034935073101 was found to be: Known bad.

Malicious Activity Summary

upx oski infostealer spyware stealer

Oski

UPX packed file

Reads user/profile data of web browsers

Drops startup file

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-19 19:46

Signatures

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-19 19:46

Reported

2023-12-20 00:20

Platform

win7-20231129-en

Max time kernel

141s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe"

Signatures

Oski

infostealer oski

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\x.vbs C:\Windows\SysWOW64\cmd.exe N/A

Reads user/profile data of web browsers

spyware stealer

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2348 set thread context of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2348 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\cmd.exe
PID 2348 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\cmd.exe
PID 2348 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\cmd.exe
PID 2348 wrote to memory of 860 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\cmd.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 2348 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 1088 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\WerFault.exe
PID 1088 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\WerFault.exe
PID 1088 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\WerFault.exe
PID 1088 wrote to memory of 2476 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

"C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe"

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c echo on error resume next:CreateObject("WScript.Shell").Run "C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe",1: >"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\x.vbs"

C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1088 -s 768

Network

Country Destination Domain Proto
US 8.8.8.8:53 agencybro.tech udp

Files

memory/2348-0-0x0000000000400000-0x000000000047D000-memory.dmp

memory/1088-2-0x0000000000300000-0x0000000000400000-memory.dmp

memory/2348-4-0x0000000001F30000-0x0000000001FAD000-memory.dmp

memory/1088-3-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-6-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-8-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-10-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-12-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-14-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-16-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-18-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-20-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-22-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1088-24-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-27-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/2348-30-0x0000000000400000-0x000000000047D000-memory.dmp

memory/1088-29-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-31-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-32-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/1088-33-0x0000000000400000-0x0000000000470000-memory.dmp

memory/1088-35-0x0000000000400000-0x0000000000470000-memory.dmp

memory/1088-36-0x0000000000400000-0x00000000019E0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-19 19:46

Reported

2023-12-20 00:19

Platform

win10v2004-20231215-en

Max time kernel

112s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe"

Signatures

Oski

infostealer oski

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\x.vbs C:\Windows\SysWOW64\cmd.exe N/A

Reads user/profile data of web browsers

spyware stealer

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3252 set thread context of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3252 wrote to memory of 4168 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\cmd.exe
PID 3252 wrote to memory of 4168 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\cmd.exe
PID 3252 wrote to memory of 4168 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Windows\SysWOW64\cmd.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe
PID 3252 wrote to memory of 4492 N/A C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

Processes

C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

"C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe"

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c echo on error resume next:CreateObject("WScript.Shell").Run "C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe",1: >"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\x.vbs"

C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

C:\Users\Admin\AppData\Local\Temp\887e6a417f06bb6dc94f034935073101.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4492 -ip 4492

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4492 -s 1308

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 18.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 201.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 agencybro.tech udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/3252-0-0x0000000000400000-0x000000000047D000-memory.dmp

memory/4492-2-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/4492-4-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/3252-3-0x0000000000400000-0x000000000047D000-memory.dmp

memory/4492-5-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/4492-6-0x0000000000400000-0x00000000019E0000-memory.dmp

memory/4492-10-0x0000000000400000-0x0000000000470000-memory.dmp

memory/4492-9-0x0000000000400000-0x00000000019E0000-memory.dmp