Malware Analysis Report

2024-10-19 08:41

Sample ID 240418-rmdlxafd75
Target aa.exe
SHA256 ef2c6cf5a0ba1b81ab22164b7820f49761de4f6feb8fa4e5c64a1bfad369cc74
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 Overview

score
10/10

SHA256

ef2c6cf5a0ba1b81ab22164b7820f49761de4f6feb8fa4e5c64a1bfad369cc74

Threat Level: Known bad

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

Malicious Activity Summary

office04 quasar spyware trojan

Quasar RAT

Quasar payload

Quasar family

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Uses Task Scheduler COM API

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Creates scheduled task(s)

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-18 14:18

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

2024-04-18 14:18

Reported

2024-04-18 14:23

Platform

win10v2004-20240226-en

Max time kernel

282s

Max time network

301s

Command Line

"C:\Users\Admin\AppData\Local\Temp\aa.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

Enumerates physical storage devices

Creates scheduled task(s)

persistence
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\aa.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\SubDir\Client.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\aa.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A 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\aa.exe

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

C:\Windows\SYSTEM32\schtasks.exe

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

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4132 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
N/A 192.168.254.152:4782 tcp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
PH 180.190.63.111:8080 tcp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 216.58.212.202:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 202.212.58.216.in-addr.arpa udp
N/A 192.168.254.152:4782 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
PH 180.190.63.111:8080 tcp
N/A 192.168.254.152:4782 tcp
PH 180.190.63.111:8080 tcp
US 8.8.8.8:53 214.143.182.52.in-addr.arpa udp
N/A 192.168.254.152:4782 tcp
PH 180.190.63.111:8080 tcp
N/A 192.168.254.152:4782 tcp
PH 180.190.63.111:8080 tcp
N/A 192.168.254.152:4782 tcp
PH 180.190.63.111:8080 tcp

Files

memory/3364-0-0x0000000000200000-0x0000000000524000-memory.dmp

memory/3364-1-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp

memory/3364-2-0x000000001B3B0000-0x000000001B3C0000-memory.dmp

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

MD5 a1b18584a5906f5be41db7dd83325caa
SHA1 749e349a70fb0a2778900fceb15ff7f3ed033196
SHA256 ef2c6cf5a0ba1b81ab22164b7820f49761de4f6feb8fa4e5c64a1bfad369cc74
SHA512 037e7b94ccea547a113304aa73fb940401c18a8e1d3df5681a191b0f9292769419f48bf8fe1f6f69534f320f34fabac638735d2e3ea2ff12039518193dca4ede

memory/3364-9-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp

memory/3596-10-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp

memory/3596-11-0x000000001B690000-0x000000001B6A0000-memory.dmp

memory/3596-12-0x000000001C6D0000-0x000000001C720000-memory.dmp

memory/3596-13-0x000000001C7E0000-0x000000001C892000-memory.dmp

memory/3596-14-0x000000001CFD0000-0x000000001D4F8000-memory.dmp

memory/3596-16-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp

memory/3596-17-0x000000001B690000-0x000000001B6A0000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\aa.exe.log

MD5 baf55b95da4a601229647f25dad12878
SHA1 abc16954ebfd213733c4493fc1910164d825cac8
SHA256 ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924
SHA512 24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

memory/3528-21-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp

memory/3528-22-0x000000001BAA0000-0x000000001BAB0000-memory.dmp

memory/3528-23-0x00007FF8A2360000-0x00007FF8A2E21000-memory.dmp