quasar | 7a771a1bec7798e6d59605d5bd806f47c0a3930a44eda0ccc6eb54a07742a15e

General

Target

SynapseX Launcher.exe
Size

3.1MB
MD5

c63951cd0f1b3690d0c18525b3c9b4dd
SHA1

de9bb6723dd1a2c7e8eedbff1b03f451a4225907
SHA256

7a771a1bec7798e6d59605d5bd806f47c0a3930a44eda0ccc6eb54a07742a15e
SHA512

52b71521cd09d81ff048aa4c951c1d7f0d4654dd7871efa9e690da2d1212d1506c32476f29e8ad7e99bfb3428aa523ac5fc754bb2fdaeda50dc67fcf57cd2b4a
SSDEEP

49152:6vEuf2NUaNmwzPWlvdaKM7ZxTwAgn3FRMhE7oGMnTHHB72eh2NT:6vzf2NUaNmwzPWlvdaB7ZxTw/n3Fx

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.114:4782

piraja2832-61225.portmap.host:61225

Mutex

e265792d-0878-4d56-aabb-98c33762d3b3

Attributes

encryption_key
D5656C6F6DCF32FFE4A0A45B9A1E278FCDFF35C0
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
System32
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2856-1-0x0000000000940000-0x0000000000C64000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral1/memory/2464-9-0x0000000000EC0000-0x00000000011E4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2464 Client.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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

2192 schtasks.exe
2524 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SynapseX Launcher.exeClient.exe

description pid process

Token: SeDebugPrivilege 2856 SynapseX Launcher.exe
Token: SeDebugPrivilege 2464 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

2464 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

2464 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

2464 Client.exe

pid	process
2464	Client.exe

pid	process
2192	schtasks.exe
2524	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2856	SynapseX Launcher.exe
Token: SeDebugPrivilege	2464	Client.exe

pid	process
2464	Client.exe

pid	process
2464	Client.exe

pid	process
2464	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

SynapseX Launcher.exeClient.exe

description	pid	process	target process
PID 2856 wrote to memory of 2192	2856	SynapseX Launcher.exe	schtasks.exe
PID 2856 wrote to memory of 2192	2856	SynapseX Launcher.exe	schtasks.exe
PID 2856 wrote to memory of 2192	2856	SynapseX Launcher.exe	schtasks.exe
PID 2856 wrote to memory of 2464	2856	SynapseX Launcher.exe	Client.exe
PID 2856 wrote to memory of 2464	2856	SynapseX Launcher.exe	Client.exe
PID 2856 wrote to memory of 2464	2856	SynapseX Launcher.exe	Client.exe
PID 2464 wrote to memory of 2524	2464	Client.exe	schtasks.exe
PID 2464 wrote to memory of 2524	2464	Client.exe	schtasks.exe
PID 2464 wrote to memory of 2524	2464	Client.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\SynapseX Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\SynapseX Launcher.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2856

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "System32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2192

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2464

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "System32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
3.1MB

MD5
c63951cd0f1b3690d0c18525b3c9b4dd

SHA1
de9bb6723dd1a2c7e8eedbff1b03f451a4225907

SHA256
7a771a1bec7798e6d59605d5bd806f47c0a3930a44eda0ccc6eb54a07742a15e

SHA512
52b71521cd09d81ff048aa4c951c1d7f0d4654dd7871efa9e690da2d1212d1506c32476f29e8ad7e99bfb3428aa523ac5fc754bb2fdaeda50dc67fcf57cd2b4a

Download Submit
memory/2464-10-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download
memory/2464-9-0x0000000000EC0000-0x00000000011E4000-memory.dmp

Filesize
3.1MB

Download
memory/2464-11-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download
memory/2464-12-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download
memory/2856-0-0x000007FEF5923000-0x000007FEF5924000-memory.dmp

Filesize
4KB

Download
memory/2856-1-0x0000000000940000-0x0000000000C64000-memory.dmp

Filesize
3.1MB

Download
memory/2856-2-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download
memory/2856-8-0x000007FEF5920000-0x000007FEF630C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads