quasar | 215f5b71ce3863e06a15912c7c50435e47b7e371d4d5b0aa91141757978ed2ea

Analysis

max time kernel
124s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
27-06-2024 19:25

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General

Target

Loader.exe
Size

3.1MB
MD5

daf9409eb0c42c801076c1eebc574c9f
SHA1

18312de07c4f7bbc4181850b22d5195d17dd6e7b
SHA256

215f5b71ce3863e06a15912c7c50435e47b7e371d4d5b0aa91141757978ed2ea
SHA512

ef067f9fc07c5a9c100c8dc804cd09492fdeeb4821c939078db1a848b712229e26c5e005851518b31528bf733c27c1d19d9fe6c374fc37a597055c591e09dfd2
SSDEEP

49152:zv0uf2NUaNmwzPWlvdaKM7ZxTwCeRJ6FbR3LoGdaTHHB72eh2NT:zvjf2NUaNmwzPWlvdaB7ZxTwCeRJ6X

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

history-foo.gl.at.ply.gg:42349

Mutex

51fe5088-4e6f-43ea-a53f-ed49150587aa324254r4r3weff4f45r3ewwtrfrt

Attributes

encryption_key
CBFC5D217E55BEBDCD3A6EFA924299F76BC328D9
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Update
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar payload 1 IoCs

Processes:

resource yara_rule

behavioral1/memory/3740-1-0x0000000000FF0000-0x0000000001314000-memory.dmp family_quasar
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

3664 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Loader.exe

description pid process

Token: SeDebugPrivilege 3740 Loader.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Loader.exe

pid process

3740 Loader.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Loader.exe

description pid process target process

PID 3740 wrote to memory of 3664 3740 Loader.exe schtasks.exe
PID 3740 wrote to memory of 3664 3740 Loader.exe schtasks.exe
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

resource	yara_rule
behavioral1/memory/3740-1-0x0000000000FF0000-0x0000000001314000-memory.dmp	family_quasar

pid	process
3664	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3740	Loader.exe

pid	process
3740	Loader.exe

description	pid	process	target process
PID 3740 wrote to memory of 3664	3740	Loader.exe	schtasks.exe
PID 3740 wrote to memory of 3664	3740	Loader.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3740

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Scheduled Task/Job: Scheduled Task
PID:3664

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 --field-trial-handle=1416,i,15316930299780304231,7592852768794498680,262144 --variations-seed-version --mojo-platform-channel-handle=3104 /prefetch:8
1⤵
PID:3480

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

memory/3740-0-0x00007FFED6C03000-0x00007FFED6C05000-memory.dmp

Filesize
8KB

Download
memory/3740-1-0x0000000000FF0000-0x0000000001314000-memory.dmp

Filesize
3.1MB

Download
memory/3740-2-0x00007FFED6C00000-0x00007FFED76C1000-memory.dmp

Filesize
10.8MB

Download
memory/3740-3-0x000000001BFA0000-0x000000001BFF0000-memory.dmp

Filesize
320KB

Download
memory/3740-4-0x000000001C7C0000-0x000000001C872000-memory.dmp

Filesize
712KB

Download
memory/3740-7-0x000000001C750000-0x000000001C762000-memory.dmp

Filesize
72KB

Download
memory/3740-8-0x000000001D2C0000-0x000000001D2FC000-memory.dmp

Filesize
240KB

Download
memory/3740-9-0x00007FFED6C03000-0x00007FFED6C05000-memory.dmp

Filesize
8KB

Download
memory/3740-10-0x00007FFED6C00000-0x00007FFED76C1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads