quasar | 85b551f3f7d0b53ec30709df217d767e2358e74efae7df9bfa9e74f48ead784d

Analysis

max time kernel
149s
max time network
151s
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 19:24

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General

Target

Loader.exe
Size

3.1MB
MD5

98cd04c4ac429841ac630d57a8407c6f
SHA1

dcbde5d92c108aceca4342ca2b89157d4bd0444e
SHA256

85b551f3f7d0b53ec30709df217d767e2358e74efae7df9bfa9e74f48ead784d
SHA512

66f7b6c4c0cd1b1abad5f5a500b77cf7601004e269acb313381cc074b58d6a127913adf0bc4da439f5df361d0252e645ab5d6ad5378c1933a8592d1997e826b3
SSDEEP

49152:Xv0uf2NUaNmwzPWlvdaKM7ZxTwHMxOFFmzqcoGd4QTHHB72eh2NT:Xvjf2NUaNmwzPWlvdaB7ZxTwsxOFMo

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/2768-1-0x0000000000710000-0x0000000000A34000-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

4944 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Loader.exe

description pid process

Token: SeDebugPrivilege 2768 Loader.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Loader.exe

pid process

2768 Loader.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Loader.exe

description pid process target process

PID 2768 wrote to memory of 4944 2768 Loader.exe schtasks.exe
PID 2768 wrote to memory of 4944 2768 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/2768-1-0x0000000000710000-0x0000000000A34000-memory.dmp	family_quasar

pid	process
4944	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2768	Loader.exe

pid	process
2768	Loader.exe

description	pid	process	target process
PID 2768 wrote to memory of 4944	2768	Loader.exe	schtasks.exe
PID 2768 wrote to memory of 4944	2768	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:2768

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:4944

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

memory/2768-0-0x00007FFB65F33000-0x00007FFB65F35000-memory.dmp

Filesize
8KB

Download
memory/2768-1-0x0000000000710000-0x0000000000A34000-memory.dmp

Filesize
3.1MB

Download
memory/2768-2-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

Filesize
10.8MB

Download
memory/2768-3-0x000000001B5B0000-0x000000001B600000-memory.dmp

Filesize
320KB

Download
memory/2768-4-0x000000001C240000-0x000000001C2F2000-memory.dmp

Filesize
712KB

Download
memory/2768-5-0x00007FFB65F33000-0x00007FFB65F35000-memory.dmp

Filesize
8KB

Download
memory/2768-6-0x00007FFB65F30000-0x00007FFB669F1000-memory.dmp

Filesize
10.8MB

Download
memory/2768-9-0x000000001C1E0000-0x000000001C1F2000-memory.dmp

Filesize
72KB

Download
memory/2768-10-0x000000001CE40000-0x000000001CE7C000-memory.dmp

Filesize
240KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads