quasar | f0160a1f7a39862e14063ac468957559656405f51d97ad56dc7cff9ad34da9f1

Analysis

max time kernel
135s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 18:57

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General

Target

Synapse X Launcher.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/1988-0-0x0000000000710000-0x0000000000A34000-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

3356 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

4816 schtasks.exe
1580 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Synapse X Launcher.exeUpdate.exe

description pid process

Token: SeDebugPrivilege 1988 Synapse X Launcher.exe
Token: SeDebugPrivilege 3356 Update.exe

pid	process
3356	Update.exe

pid	process
4816	schtasks.exe
1580	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1988	Synapse X Launcher.exe
Token: SeDebugPrivilege	3356	Update.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Synapse X Launcher.exeUpdate.exe

description	pid	process	target process
PID 1988 wrote to memory of 4816	1988	Synapse X Launcher.exe	schtasks.exe
PID 1988 wrote to memory of 4816	1988	Synapse X Launcher.exe	schtasks.exe
PID 1988 wrote to memory of 3356	1988	Synapse X Launcher.exe	Update.exe
PID 1988 wrote to memory of 3356	1988	Synapse X Launcher.exe	Update.exe
PID 3356 wrote to memory of 1580	3356	Update.exe	schtasks.exe
PID 3356 wrote to memory of 1580	3356	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⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1988

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:4816

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:3356

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:1580

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 --field-trial-handle=4372,i,6576818814118437872,11004518367271063231,262144 --variations-seed-version --mojo-platform-channel-handle=1032 /prefetch:8
1⤵
PID:3196

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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/1988-0-0x0000000000710000-0x0000000000A34000-memory.dmp

Filesize
3.1MB

Download
memory/1988-1-0x00007FFE9C853000-0x00007FFE9C855000-memory.dmp

Filesize
8KB

Download
memory/1988-2-0x00007FFE9C850000-0x00007FFE9D311000-memory.dmp

Filesize
10.8MB

Download
memory/1988-9-0x00007FFE9C850000-0x00007FFE9D311000-memory.dmp

Filesize
10.8MB

Download
memory/3356-10-0x00007FFE9C850000-0x00007FFE9D311000-memory.dmp

Filesize
10.8MB

Download
memory/3356-11-0x00007FFE9C850000-0x00007FFE9D311000-memory.dmp

Filesize
10.8MB

Download
memory/3356-12-0x000000001B8F0000-0x000000001B940000-memory.dmp

Filesize
320KB

Download
memory/3356-13-0x000000001BA00000-0x000000001BAB2000-memory.dmp

Filesize
712KB

Download
memory/3356-16-0x000000001B940000-0x000000001B952000-memory.dmp

Filesize
72KB

Download
memory/3356-17-0x000000001B9A0000-0x000000001B9DC000-memory.dmp

Filesize
240KB

Download
memory/3356-18-0x00007FFE9C850000-0x00007FFE9D311000-memory.dmp

Filesize
10.8MB

Download