Malware Analysis Report

2024-09-22 21:46

Sample ID 240205-ygkllafbd8
Target 92d6baf79e990130a1db2175731d4e46
SHA256 d9fa9a6d2f94da43ceb1e54df2cac4e099d6700ad52db757e5cbbece821e73d9
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

d9fa9a6d2f94da43ceb1e54df2cac4e099d6700ad52db757e5cbbece821e73d9

Threat Level: Known bad

The file 92d6baf79e990130a1db2175731d4e46 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

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-02-05 19:45

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-05 19:45

Reported

2024-02-05 19:48

Platform

win7-20231129-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe"

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2196 set thread context of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2196 wrote to memory of 2696 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 2696 wrote to memory of 2536 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Windows\SysWOW64\WerFault.exe
PID 2696 wrote to memory of 2536 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Windows\SysWOW64\WerFault.exe
PID 2696 wrote to memory of 2536 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Windows\SysWOW64\WerFault.exe
PID 2696 wrote to memory of 2536 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe

"C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe"

C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe

"C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2696 -s 112

Network

N/A

Files

memory/2196-0-0x0000000000CC0000-0x0000000000D72000-memory.dmp

memory/2196-1-0x00000000749F0000-0x00000000750DE000-memory.dmp

memory/2196-2-0x0000000000690000-0x00000000006D0000-memory.dmp

memory/2196-3-0x00000000003C0000-0x00000000003D8000-memory.dmp

memory/2196-4-0x00000000749F0000-0x00000000750DE000-memory.dmp

memory/2196-5-0x0000000000690000-0x00000000006D0000-memory.dmp

memory/2196-6-0x0000000007D20000-0x0000000007DC6000-memory.dmp

memory/2196-7-0x0000000000AC0000-0x0000000000B02000-memory.dmp

memory/2696-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2696-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2696-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2696-18-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2696-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2696-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2196-21-0x00000000749F0000-0x00000000750DE000-memory.dmp

memory/2696-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2696-12-0x0000000000400000-0x0000000000438000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-05 19:45

Reported

2024-02-05 19:48

Platform

win10v2004-20231222-en

Max time kernel

90s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1060 set thread context of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1060 wrote to memory of 3592 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 3592 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 3592 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe
PID 1060 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe

Processes

C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe

"C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe"

C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe

"C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe"

C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe

"C:\Users\Admin\AppData\Local\Temp\92d6baf79e990130a1db2175731d4e46.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2760 -ip 2760

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2760 -s 1312

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 178.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 28.160.77.104.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 ck7.mooo.com udp
US 8.8.8.8:53 29.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp

Files

memory/1060-0-0x0000000000BF0000-0x0000000000CA2000-memory.dmp

memory/1060-1-0x0000000075330000-0x0000000075AE0000-memory.dmp

memory/1060-2-0x0000000005D00000-0x00000000062A4000-memory.dmp

memory/1060-3-0x0000000005670000-0x0000000005702000-memory.dmp

memory/1060-4-0x00000000057F0000-0x000000000588C000-memory.dmp

memory/1060-5-0x00000000057E0000-0x00000000057F0000-memory.dmp

memory/1060-6-0x0000000005750000-0x000000000575A000-memory.dmp

memory/1060-7-0x0000000008090000-0x00000000080A8000-memory.dmp

memory/1060-8-0x0000000075330000-0x0000000075AE0000-memory.dmp

memory/1060-9-0x00000000057E0000-0x00000000057F0000-memory.dmp

memory/1060-10-0x0000000008640000-0x00000000086E6000-memory.dmp

memory/1060-11-0x000000000AD60000-0x000000000ADA2000-memory.dmp

memory/2760-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2760-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2760-15-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2760-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1060-17-0x0000000075330000-0x0000000075AE0000-memory.dmp

memory/2760-20-0x0000000000400000-0x0000000000438000-memory.dmp