quasar | f0160a1f7a39862e14063ac468957559656405f51d97ad56dc7cff9ad34da9f1

Analysis

max time kernel
146s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 18:28

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General

Target

SynapseXLauncher.exe
Size

3.1MB
MD5

1a1fda92143e414b4d4153ab05dd1ce8
SHA1

33ac2b2d228a1ec93b0ea70ffadb436933b9a1e5
SHA256

f0160a1f7a39862e14063ac468957559656405f51d97ad56dc7cff9ad34da9f1
SHA512

70a9a6948f98f3bdc2c7b461634098347bdf683dec36fa92bd1ac652f72daf7fa01f842cbb8331f26c9c5f76907604f75f7c45b746bcfe8f395b3864f998f391
SSDEEP

49152:VvnI22SsaNYfdPBldt698dBcjHOaRJ6HbR3LoGddPkTHHB72eh2NT:VvI22SsaNYfdPBldt6+dBcjHOaRJ6Zd

Score

10^/10

quasar windows update spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Windows Update

skbidiooiilet-31205.portmap.host:31205

Mutex

7357b58d-e5d4-42be-8b74-db6eee6cde6d

Attributes

encryption_key
6F721445F7E0B1CF58980D84A9D49F4458D4EFD9
install_name
Update.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsUpdate
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/1624-1-0x0000000000EF0000-0x0000000001214000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Update.exe

pid process

4816 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

64 schtasks.exe
3484 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SynapseXLauncher.exeUpdate.exe

description pid process

Token: SeDebugPrivilege 1624 SynapseXLauncher.exe
Token: SeDebugPrivilege 4816 Update.exe

pid	process
4816	Update.exe

pid	process
64	schtasks.exe
3484	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1624	SynapseXLauncher.exe
Token: SeDebugPrivilege	4816	Update.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

SynapseXLauncher.exeUpdate.exe

description	pid	process	target process
PID 1624 wrote to memory of 64	1624	SynapseXLauncher.exe	schtasks.exe
PID 1624 wrote to memory of 64	1624	SynapseXLauncher.exe	schtasks.exe
PID 1624 wrote to memory of 4816	1624	SynapseXLauncher.exe	Update.exe
PID 1624 wrote to memory of 4816	1624	SynapseXLauncher.exe	Update.exe
PID 4816 wrote to memory of 3484	4816	Update.exe	schtasks.exe
PID 4816 wrote to memory of 3484	4816	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\SynapseXLauncher.exe
"C:\Users\Admin\AppData\Local\Temp\SynapseXLauncher.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1624

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:64

C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe
"C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4816

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:3484

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe

Filesize
3.1MB

MD5
1a1fda92143e414b4d4153ab05dd1ce8

SHA1
33ac2b2d228a1ec93b0ea70ffadb436933b9a1e5

SHA256
f0160a1f7a39862e14063ac468957559656405f51d97ad56dc7cff9ad34da9f1

SHA512
70a9a6948f98f3bdc2c7b461634098347bdf683dec36fa92bd1ac652f72daf7fa01f842cbb8331f26c9c5f76907604f75f7c45b746bcfe8f395b3864f998f391

Download Submit
memory/1624-0-0x00007FF9335B3000-0x00007FF9335B5000-memory.dmp

Filesize
8KB

Download
memory/1624-1-0x0000000000EF0000-0x0000000001214000-memory.dmp

Filesize
3.1MB

Download
memory/1624-2-0x00007FF9335B0000-0x00007FF934071000-memory.dmp

Filesize
10.8MB

Download
memory/1624-10-0x00007FF9335B0000-0x00007FF934071000-memory.dmp

Filesize
10.8MB

Download
memory/4816-9-0x00007FF9335B0000-0x00007FF934071000-memory.dmp

Filesize
10.8MB

Download
memory/4816-11-0x00007FF9335B0000-0x00007FF934071000-memory.dmp

Filesize
10.8MB

Download
memory/4816-12-0x000000001C160000-0x000000001C1B0000-memory.dmp

Filesize
320KB

Download
memory/4816-13-0x000000001C270000-0x000000001C322000-memory.dmp

Filesize
712KB

Download
memory/4816-14-0x00007FF9335B0000-0x00007FF934071000-memory.dmp

Filesize
10.8MB

Download