quasar | 6c4367e763852b7afe852905e9d7baba18ac33c1e4eaf8370350824fb3ffce86

Analysis

max time kernel
124s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
13-05-2024 16:02

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General

Target

Synapse X Launcher.exe
Size

3.2MB
MD5

3854a6572a9a5a25bccbd13664713915
SHA1

b7c3ca681c1dcb328113c5966bbd96aed541ae64
SHA256

6c4367e763852b7afe852905e9d7baba18ac33c1e4eaf8370350824fb3ffce86
SHA512

80fb1425c57d7984da87349efdc0c4508296b58548e62ee4743215edd1058818154cb1207b95ec74299c7b61953f19f71c6ab0d325126efd21d8c5749ad69452
SSDEEP

49152:pvblL26AaNeWgPhlmVqvMQ7XSKB/RJ6UbR3LoGdM+THHB72eh2NTgj:pvBL26AaNeWgPhlmVqkQ7XSKB/RJ6e

Score

10^/10

quasar windows update spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Windows Update

espinyskibidi-29823.portmap.host:29823

Mutex

a94ba996-69af-4720-85e6-f4929c5eb0f8

Attributes

encryption_key
6F721445F7E0B1CF58980D84A9D49F4458D4EFD9
install_name
Update.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Update Startup
subdirectory
Windows Update

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1340-0-0x0000000000630000-0x0000000000972000-memory.dmp	family_quasar
C:\Windows\system32\Windows Update\Update.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Update.exe

pid process

4364 Update.exe

pid	process
4364	Update.exe

Drops file in System32 directory 5 IoCs

Processes:

Synapse X Launcher.exeUpdate.exe

description	ioc	process
File created	C:\Windows\system32\Windows Update\Update.exe	Synapse X Launcher.exe
File opened for modification	C:\Windows\system32\Windows Update\Update.exe	Synapse X Launcher.exe
File opened for modification	C:\Windows\system32\Windows Update	Synapse X Launcher.exe
File opened for modification	C:\Windows\system32\Windows Update\Update.exe	Update.exe
File opened for modification	C:\Windows\system32\Windows Update	Update.exe

Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

4508 schtasks.exe
3620 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Synapse X Launcher.exeUpdate.exe

description pid process

Token: SeDebugPrivilege 1340 Synapse X Launcher.exe
Token: SeDebugPrivilege 4364 Update.exe

pid	process
4508	schtasks.exe
3620	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1340	Synapse X Launcher.exe
Token: SeDebugPrivilege	4364	Update.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Synapse X Launcher.exeUpdate.exe

description	pid	process	target process
PID 1340 wrote to memory of 4508	1340	Synapse X Launcher.exe	schtasks.exe
PID 1340 wrote to memory of 4508	1340	Synapse X Launcher.exe	schtasks.exe
PID 1340 wrote to memory of 4364	1340	Synapse X Launcher.exe	Update.exe
PID 1340 wrote to memory of 4364	1340	Synapse X Launcher.exe	Update.exe
PID 4364 wrote to memory of 3620	4364	Update.exe	schtasks.exe
PID 4364 wrote to memory of 3620	4364	Update.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

C:\Users\Admin\AppData\Local\Temp\Synapse X Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\Synapse X Launcher.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1340

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows Update Startup" /sc ONLOGON /tr "C:\Windows\system32\Windows Update\Update.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4508

C:\Windows\system32\Windows Update\Update.exe
"C:\Windows\system32\Windows Update\Update.exe"
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4364

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows Update Startup" /sc ONLOGON /tr "C:\Windows\system32\Windows Update\Update.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:3620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\system32\Windows Update\Update.exe

Filesize
3.2MB

MD5
3854a6572a9a5a25bccbd13664713915

SHA1
b7c3ca681c1dcb328113c5966bbd96aed541ae64

SHA256
6c4367e763852b7afe852905e9d7baba18ac33c1e4eaf8370350824fb3ffce86

SHA512
80fb1425c57d7984da87349efdc0c4508296b58548e62ee4743215edd1058818154cb1207b95ec74299c7b61953f19f71c6ab0d325126efd21d8c5749ad69452

Download Submit
memory/1340-0-0x0000000000630000-0x0000000000972000-memory.dmp

Filesize
3.3MB

Download
memory/1340-1-0x00007FFB32EF3000-0x00007FFB32EF5000-memory.dmp

Filesize
8KB

Download
memory/1340-2-0x00007FFB32EF0000-0x00007FFB339B1000-memory.dmp

Filesize
10.8MB

Download
memory/1340-9-0x00007FFB32EF0000-0x00007FFB339B1000-memory.dmp

Filesize
10.8MB

Download
memory/4364-10-0x00007FFB32EF0000-0x00007FFB339B1000-memory.dmp

Filesize
10.8MB

Download
memory/4364-11-0x00007FFB32EF0000-0x00007FFB339B1000-memory.dmp

Filesize
10.8MB

Download
memory/4364-12-0x000000001B920000-0x000000001B970000-memory.dmp

Filesize
320KB

Download
memory/4364-13-0x000000001C170000-0x000000001C222000-memory.dmp

Filesize
712KB

Download
memory/4364-16-0x000000001C0B0000-0x000000001C0C2000-memory.dmp

Filesize
72KB

Download
memory/4364-17-0x000000001C110000-0x000000001C14C000-memory.dmp

Filesize
240KB

Download
memory/4364-18-0x00007FFB32EF0000-0x00007FFB339B1000-memory.dmp

Filesize
10.8MB

Download