Malware Analysis Report

2025-01-03 04:55

Sample ID 220419-e2tkfscbhp
Target IMG_106_680_74_80.pdf
SHA256 9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27
Tags
oski infostealer spyware stealer suricata
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27

Threat Level: Known bad

The file IMG_106_680_74_80.pdf was found to be: Known bad.

Malicious Activity Summary

oski infostealer spyware stealer suricata

suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

Oski

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-04-19 04:26

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-04-19 04:26

Reported

2022-04-19 04:35

Platform

win7-20220414-en

Max time kernel

64s

Max time network

129s

Command Line

"C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe"

Signatures

Oski

infostealer oski

suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

suricata

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1296 set thread context of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1296 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe
PID 1180 wrote to memory of 1720 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Windows\SysWOW64\WerFault.exe
PID 1180 wrote to memory of 1720 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Windows\SysWOW64\WerFault.exe
PID 1180 wrote to memory of 1720 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Windows\SysWOW64\WerFault.exe
PID 1180 wrote to memory of 1720 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

"C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe"

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1180 -s 772

Network

Country Destination Domain Proto
US 8.8.8.8:53 osiq.icu udp
US 99.83.154.118:80 osiq.icu tcp

Files

memory/1296-54-0x0000000000FF0000-0x0000000001052000-memory.dmp

memory/1296-55-0x0000000000560000-0x000000000056A000-memory.dmp

memory/1296-56-0x0000000000B10000-0x0000000000B34000-memory.dmp

memory/1296-57-0x0000000075741000-0x0000000075743000-memory.dmp

memory/1180-58-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1180-59-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1180-61-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1180-63-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1180-65-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1180-67-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1180-68-0x000000000040717B-mapping.dmp

memory/1180-70-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1180-72-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1720-73-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-04-19 04:26

Reported

2022-04-19 04:35

Platform

win10v2004-20220414-en

Max time kernel

90s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe"

Signatures

Oski

infostealer oski

suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

suricata

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4632 set thread context of 4856 N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

"C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe"

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Users\Admin\AppData\Local\Temp\IMG_106_680_74_80.exe

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4856 -ip 4856

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4856 -s 1332

Network

Country Destination Domain Proto
US 52.109.12.18:443 tcp
US 20.42.65.84:443 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 8.8.8.8:53 osiq.icu udp
US 99.83.154.118:80 osiq.icu tcp

Files

memory/4632-130-0x0000000000160000-0x00000000001C2000-memory.dmp

memory/4632-131-0x0000000004B90000-0x0000000004C06000-memory.dmp

memory/4632-132-0x0000000004B50000-0x0000000004B6E000-memory.dmp

memory/4856-133-0x0000000000000000-mapping.dmp

memory/4856-134-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4856-135-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4856-136-0x0000000000400000-0x0000000000438000-memory.dmp

memory/4856-137-0x0000000000400000-0x0000000000438000-memory.dmp