Malware Analysis Report

2024-09-22 21:53

Sample ID 240226-t9r4xsbd9s
Target a6d680a1f920defdc3723fbf65b27924
SHA256 c0a28f12669aa6c5b1846e0e00a85806281911ff3c41817d6b912ac2ca9d7cf5
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

c0a28f12669aa6c5b1846e0e00a85806281911ff3c41817d6b912ac2ca9d7cf5

Threat Level: Known bad

The file a6d680a1f920defdc3723fbf65b27924 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

2024-02-26 16:45

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-26 16:45

Reported

2024-02-26 16:48

Platform

win7-20240221-en

Max time kernel

119s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe"

Signatures

Oski

infostealer oski

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2100 set thread context of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2100 wrote to memory of 2828 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2828 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2828 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2828 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2100 wrote to memory of 2352 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 2352 wrote to memory of 584 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Windows\SysWOW64\WerFault.exe
PID 2352 wrote to memory of 584 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Windows\SysWOW64\WerFault.exe
PID 2352 wrote to memory of 584 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Windows\SysWOW64\WerFault.exe
PID 2352 wrote to memory of 584 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe

"C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe"

C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe

"C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe"

C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe

"C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 112

Network

N/A

Files

memory/2100-0-0x0000000000E00000-0x0000000000EEA000-memory.dmp

memory/2100-1-0x0000000074110000-0x00000000747FE000-memory.dmp

memory/2100-2-0x0000000004CB0000-0x0000000004CF0000-memory.dmp

memory/2100-3-0x0000000000580000-0x0000000000598000-memory.dmp

memory/2100-4-0x0000000074110000-0x00000000747FE000-memory.dmp

memory/2100-5-0x0000000004CB0000-0x0000000004CF0000-memory.dmp

memory/2100-6-0x0000000007D50000-0x0000000007DF0000-memory.dmp

memory/2100-7-0x0000000000D50000-0x0000000000D88000-memory.dmp

memory/2352-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2352-10-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2352-11-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2352-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2352-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2352-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2352-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2352-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2100-20-0x0000000074110000-0x00000000747FE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-26 16:45

Reported

2024-02-26 16:48

Platform

win10v2004-20240226-en

Max time kernel

148s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe"

Signatures

Oski

infostealer oski

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 752 set thread context of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe
PID 752 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe

"C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe"

C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe

"C:\Users\Admin\AppData\Local\Temp\a6d680a1f920defdc3723fbf65b27924.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1316 -ip 1316

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1316 -s 1296

Network

Country Destination Domain Proto
US 8.8.8.8:53 kckark.xyz udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 88.65.42.20.in-addr.arpa udp

Files

memory/752-0-0x00000000004A0000-0x000000000058A000-memory.dmp

memory/752-1-0x0000000074820000-0x0000000074FD0000-memory.dmp

memory/752-2-0x0000000004F70000-0x000000000500C000-memory.dmp

memory/752-3-0x00000000055C0000-0x0000000005B64000-memory.dmp

memory/752-4-0x00000000050B0000-0x0000000005142000-memory.dmp

memory/752-5-0x00000000052B0000-0x00000000052C0000-memory.dmp

memory/752-6-0x0000000005020000-0x000000000502A000-memory.dmp

memory/752-7-0x0000000005150000-0x00000000051A6000-memory.dmp

memory/752-8-0x0000000005440000-0x0000000005458000-memory.dmp

memory/752-9-0x0000000074820000-0x0000000074FD0000-memory.dmp

memory/752-10-0x00000000052B0000-0x00000000052C0000-memory.dmp

memory/752-11-0x0000000008250000-0x00000000082F0000-memory.dmp

memory/752-12-0x000000000A9E0000-0x000000000AA18000-memory.dmp

memory/1316-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1316-14-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1316-16-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1316-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/752-18-0x0000000074820000-0x0000000074FD0000-memory.dmp

memory/1316-21-0x0000000000400000-0x0000000000438000-memory.dmp