Malware Analysis Report

2024-10-19 08:35

Sample ID 240730-wdak4svfne
Target SRCkey.exe
SHA256 c1fba0fc260e24b6f42a72d8725aac400465890e5ee1a422cd567229ec1609bc
Tags
office04 quasar spyware trojan
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

c1fba0fc260e24b6f42a72d8725aac400465890e5ee1a422cd567229ec1609bc

Threat Level: Known bad

The file SRCkey.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar spyware trojan

Quasar payload

Quasar RAT

Quasar family

Executes dropped EXE

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-30 17:47

Signatures

Quasar family

quasar

Quasar payload

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-30 17:47

Reported

2024-07-30 17:48

Platform

win10v2004-20240730-en

Max time kernel

18s

Max time network

22s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SRCkey.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Microsoft defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Microsoft defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
N/A 192.168.8.180:4782 tcp

Files

memory/1880-0-0x00007FF92DF63000-0x00007FF92DF65000-memory.dmp

memory/1880-1-0x00000000001C0000-0x00000000004E4000-memory.dmp

memory/1880-2-0x00007FF92DF60000-0x00007FF92EA21000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5 d0fa55b027cf3268483208bc5087bf14
SHA1 758d9396522e8458159bb7b5186340caf767f691
SHA256 c1fba0fc260e24b6f42a72d8725aac400465890e5ee1a422cd567229ec1609bc
SHA512 418ae9524de8f7326fe77c2664f1cdf2f807c0a50fe6e2619cc32fb863eff08a1b3ec26c029f1e319f540e9074380e8ca2dc9fb3f65e0cb2d26947037967f48b

memory/4708-10-0x00007FF92DF60000-0x00007FF92EA21000-memory.dmp

memory/1880-9-0x00007FF92DF60000-0x00007FF92EA21000-memory.dmp

memory/4708-11-0x00007FF92DF60000-0x00007FF92EA21000-memory.dmp

memory/4708-12-0x000000001B590000-0x000000001B5E0000-memory.dmp

memory/4708-13-0x000000001BDE0000-0x000000001BE92000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-30 17:47

Reported

2024-07-30 17:49

Platform

win11-20240709-en

Max time kernel

34s

Max time network

36s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SRCkey.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Microsoft defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Microsoft defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
N/A 192.168.8.180:4782 tcp
N/A 192.168.8.180:4782 tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

memory/1728-0-0x00007FFA30013000-0x00007FFA30015000-memory.dmp

memory/1728-1-0x0000000000BE0000-0x0000000000F04000-memory.dmp

memory/1728-2-0x00007FFA30010000-0x00007FFA30AD2000-memory.dmp

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5 d0fa55b027cf3268483208bc5087bf14
SHA1 758d9396522e8458159bb7b5186340caf767f691
SHA256 c1fba0fc260e24b6f42a72d8725aac400465890e5ee1a422cd567229ec1609bc
SHA512 418ae9524de8f7326fe77c2664f1cdf2f807c0a50fe6e2619cc32fb863eff08a1b3ec26c029f1e319f540e9074380e8ca2dc9fb3f65e0cb2d26947037967f48b

memory/3988-10-0x00007FFA30010000-0x00007FFA30AD2000-memory.dmp

memory/1728-9-0x00007FFA30010000-0x00007FFA30AD2000-memory.dmp

memory/3988-11-0x00007FFA30010000-0x00007FFA30AD2000-memory.dmp

memory/3988-12-0x000000001B7A0000-0x000000001B7F0000-memory.dmp

memory/3988-13-0x000000001BFF0000-0x000000001C0A2000-memory.dmp

memory/3988-14-0x00007FFA30010000-0x00007FFA30AD2000-memory.dmp