quasar | 7939f7d7f256502832c6c5236e9ab25adb6b42070055ed61003dead58c545d14

Resubmissions

04-01-2024 18:14

240104-wvbjqshae2 10

04-01-2024 18:10

240104-wsg9hagdaq 10

04-01-2024 17:57

240104-wjq52sgbej 10

Analysis

max time kernel
43s
max time network
48s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
04-01-2024 18:14

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General

Target

Client-built2.exe
Size

3.1MB
MD5

25a6e6b8caea99854e5908e9b71362a2
SHA1

556604b1fce41861d9c0e8b8f078dc9601ce992e
SHA256

7939f7d7f256502832c6c5236e9ab25adb6b42070055ed61003dead58c545d14
SHA512

b55d9206df0ed5824d5c28aa705aebd2486a14c20973fd12add63b8a3434d41f146a95f492ec834c171613a3b1f9b600a78f6c68899f6c996199092e886cfec2
SSDEEP

49152:jvTlL26AaNeWgPhlmVqvMQ7XSK8cRJ61bR3LoGdfmTHHB72eh2NT:jvJL26AaNeWgPhlmVqkQ7XSK8cRJ6H

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

2a02:ab88:1412:4700:5144:139:e041:bf2:1177

Mutex

cf62a49b-b605-4642-9434-7fa717f78e98

Attributes

encryption_key
0D82AEC86C28AE814DDFCE09C92A2D514937B13E
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/3884-0-0x0000000000EA0000-0x00000000011C4000-memory.dmp	family_quasar

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3884	Client-built2.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3884	Client-built2.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3884	Client-built2.exe

C:\Users\Admin\AppData\Local\Temp\Client-built2.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built2.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:3884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3884-0-0x0000000000EA0000-0x00000000011C4000-memory.dmp

Filesize
3.1MB

Download
memory/3884-2-0x000000001BF60000-0x000000001BF70000-memory.dmp

Filesize
64KB

Download
memory/3884-1-0x00007FFEC4830000-0x00007FFEC52F1000-memory.dmp

Filesize
10.8MB

Download
memory/3884-3-0x000000001C9B0000-0x000000001CA00000-memory.dmp

Filesize
320KB

Download
memory/3884-4-0x000000001CAC0000-0x000000001CB72000-memory.dmp

Filesize
712KB

Download
memory/3884-5-0x00007FFEC4830000-0x00007FFEC52F1000-memory.dmp

Filesize
10.8MB

Download