quasar | bccae30d15564418d4f8ee309c47adaa054039a1a68ea59ee95b6a5ef92d8487

Analysis

max time kernel
149s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
17-05-2024 07:41

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General

Target

0x000a000000013a21-7.exe
Size

3.1MB
MD5

f91699f2ff3f446461a302ea2d69be44
SHA1

caf1e89a10b97668773e6150dd4b3cecee194c86
SHA256

bccae30d15564418d4f8ee309c47adaa054039a1a68ea59ee95b6a5ef92d8487
SHA512

2eb25181445c88044960ad65417cee3c14d83be935c6fc471288687b02c3113851b7b4c980b73994d90688f6e551eeb76001e8cfc120922dacbd5d8c7e3cbc4d
SSDEEP

49152:/vOlL26AaNeWgPhlmVqvMQ7XSK0FIkEiU3k/KLoGddq3THHB72eh2NT:/v+L26AaNeWgPhlmVqkQ7XSKuI3

Score

10^/10

quasar webhook spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Webhook

bardu3662.duckdns.org:9733

Mutex

afa58199-2aae-4e08-8ef4-8e4ef39bc0aa

Attributes

encryption_key
080342EF5ED2B5D16317695CC4327BF2FFC034AA
install_name
RuntimeBroker.exe
log_directory
Logs
reconnect_delay
1000
startup_key
Update
subdirectory
ApplicationFrameHost

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3192-1-0x0000000000080000-0x00000000003A4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\ApplicationFrameHost\RuntimeBroker.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

RuntimeBroker.exe

pid process

3880 RuntimeBroker.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

1320 schtasks.exe
2520 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0x000a000000013a21-7.exeRuntimeBroker.exe

description pid process

Token: SeDebugPrivilege 3192 0x000a000000013a21-7.exe
Token: SeDebugPrivilege 3880 RuntimeBroker.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RuntimeBroker.exe

pid process

3880 RuntimeBroker.exe

pid	process
3880	RuntimeBroker.exe

pid	process
1320	schtasks.exe
2520	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3192	0x000a000000013a21-7.exe
Token: SeDebugPrivilege	3880	RuntimeBroker.exe

pid	process
3880	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

0x000a000000013a21-7.exeRuntimeBroker.exe

description	pid	process	target process
PID 3192 wrote to memory of 1320	3192	0x000a000000013a21-7.exe	schtasks.exe
PID 3192 wrote to memory of 1320	3192	0x000a000000013a21-7.exe	schtasks.exe
PID 3192 wrote to memory of 3880	3192	0x000a000000013a21-7.exe	RuntimeBroker.exe
PID 3192 wrote to memory of 3880	3192	0x000a000000013a21-7.exe	RuntimeBroker.exe
PID 3880 wrote to memory of 2520	3880	RuntimeBroker.exe	schtasks.exe
PID 3880 wrote to memory of 2520	3880	RuntimeBroker.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\0x000a000000013a21-7.exe
"C:\Users\Admin\AppData\Local\Temp\0x000a000000013a21-7.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3192

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\ApplicationFrameHost\RuntimeBroker.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1320

C:\Users\Admin\AppData\Roaming\ApplicationFrameHost\RuntimeBroker.exe
"C:\Users\Admin\AppData\Roaming\ApplicationFrameHost\RuntimeBroker.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3880

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\ApplicationFrameHost\RuntimeBroker.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2520

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 --mojo-platform-channel-handle=4136 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:1448

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:\Users\Admin\AppData\Roaming\ApplicationFrameHost\RuntimeBroker.exe

Filesize
3.1MB

MD5
f91699f2ff3f446461a302ea2d69be44

SHA1
caf1e89a10b97668773e6150dd4b3cecee194c86

SHA256
bccae30d15564418d4f8ee309c47adaa054039a1a68ea59ee95b6a5ef92d8487

SHA512
2eb25181445c88044960ad65417cee3c14d83be935c6fc471288687b02c3113851b7b4c980b73994d90688f6e551eeb76001e8cfc120922dacbd5d8c7e3cbc4d

Download Submit
memory/3192-0-0x00007FFED7BA3000-0x00007FFED7BA5000-memory.dmp

Filesize
8KB

Download
memory/3192-1-0x0000000000080000-0x00000000003A4000-memory.dmp

Filesize
3.1MB

Download
memory/3192-2-0x00007FFED7BA0000-0x00007FFED8661000-memory.dmp

Filesize
10.8MB

Download
memory/3192-10-0x00007FFED7BA0000-0x00007FFED8661000-memory.dmp

Filesize
10.8MB

Download
memory/3880-9-0x00007FFED7BA0000-0x00007FFED8661000-memory.dmp

Filesize
10.8MB

Download
memory/3880-11-0x000000001D600000-0x000000001D650000-memory.dmp

Filesize
320KB

Download
memory/3880-12-0x000000001D710000-0x000000001D7C2000-memory.dmp

Filesize
712KB

Download
memory/3880-13-0x00007FFED7BA0000-0x00007FFED8661000-memory.dmp

Filesize
10.8MB

Download