Malware Analysis Report

2024-09-22 21:53

Sample ID 240305-j5xhqsad3t
Target b43ae45b39a0647231b51c2d438a554e
SHA256 a2013616892886b9fcd2067d2e77436c5233653772f6a6f235a325b1122c34a9
Tags
oski infostealer spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

a2013616892886b9fcd2067d2e77436c5233653772f6a6f235a325b1122c34a9

Threat Level: Known bad

The file b43ae45b39a0647231b51c2d438a554e was found to be: Known bad.

Malicious Activity Summary

oski infostealer spyware stealer

Oski

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-03-05 08:15

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-05 08:15

Reported

2024-03-05 08:18

Platform

win7-20240220-en

Max time kernel

122s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe"

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2184 set thread context of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2184 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2184 wrote to memory of 2868 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 2868 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Windows\SysWOW64\WerFault.exe
PID 2868 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Windows\SysWOW64\WerFault.exe
PID 2868 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Windows\SysWOW64\WerFault.exe
PID 2868 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe

"C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe"

C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe

"{path}"

C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe

"{path}"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2868 -s 112

Network

N/A

Files

memory/2184-0-0x00000000012E0000-0x0000000001394000-memory.dmp

memory/2184-1-0x0000000074D50000-0x000000007543E000-memory.dmp

memory/2184-2-0x0000000004CB0000-0x0000000004CF0000-memory.dmp

memory/2184-3-0x00000000009C0000-0x00000000009C8000-memory.dmp

memory/2184-4-0x0000000074D50000-0x000000007543E000-memory.dmp

memory/2184-5-0x0000000004CB0000-0x0000000004CF0000-memory.dmp

memory/2184-6-0x0000000007F70000-0x0000000007FF6000-memory.dmp

memory/2184-7-0x0000000000C00000-0x0000000000C3A000-memory.dmp

memory/2868-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2868-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2868-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2868-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2868-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2868-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2868-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2184-21-0x0000000074D50000-0x000000007543E000-memory.dmp

memory/2868-20-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-05 08:15

Reported

2024-03-05 08:18

Platform

win10v2004-20240226-en

Max time kernel

139s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 5084 set thread context of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe
PID 5084 wrote to memory of 4256 N/A C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe

"C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe"

C:\Users\Admin\AppData\Local\Temp\b43ae45b39a0647231b51c2d438a554e.exe

"{path}"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 376 -p 4256 -ip 4256

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4256 -s 1308

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp
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 3.181.190.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.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 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 72.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 zdd.divendesign.in udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.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 55.36.223.20.in-addr.arpa udp

Files

memory/5084-0-0x0000000000F70000-0x0000000001024000-memory.dmp

memory/5084-1-0x0000000074B60000-0x0000000075310000-memory.dmp

memory/5084-2-0x0000000005F80000-0x0000000006524000-memory.dmp

memory/5084-3-0x0000000005A70000-0x0000000005B02000-memory.dmp

memory/5084-4-0x0000000005D00000-0x0000000005D10000-memory.dmp

memory/5084-5-0x0000000005A20000-0x0000000005A2A000-memory.dmp

memory/5084-6-0x0000000005EA0000-0x0000000005EA8000-memory.dmp

memory/5084-7-0x0000000006ED0000-0x0000000006F6C000-memory.dmp

memory/5084-8-0x0000000074B60000-0x0000000075310000-memory.dmp

memory/5084-9-0x0000000005D00000-0x0000000005D10000-memory.dmp

memory/5084-10-0x0000000009B90000-0x0000000009C16000-memory.dmp

memory/5084-11-0x0000000009B40000-0x0000000009B7A000-memory.dmp

memory/4256-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4256-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4256-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4256-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/5084-17-0x0000000074B60000-0x0000000075310000-memory.dmp

memory/4256-20-0x0000000000400000-0x0000000000438000-memory.dmp