quasar | 2d260adb5fc05bfb17a1e56e87e2b3eb739d8febf2671fd5d3609ff3cd56bfe7

Analysis

max time kernel
131s
max time network
147s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
10-12-2024 00:05

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General

Target

Client-built.exe
Size

3.1MB
MD5

7949ac4868bbd751e06e94d9b33b95a6
SHA1

5700606d7c246a6abf4005c0a45824071fa801aa
SHA256

2d260adb5fc05bfb17a1e56e87e2b3eb739d8febf2671fd5d3609ff3cd56bfe7
SHA512

7f27e6208e65350ab98bfec4a306059dfa098819106a85b5db9bd88c2275179054f232aa47c41d07a6433725d60a69472dd6986a6871a0bdbbdef47fb2e9c31c
SSDEEP

49152:jv7lL26AaNeWgPhlmVqvMQ7XSKMeRXBxNsoGdivdYTHHB72eh2NT:jvhL26AaNeWgPhlmVqkQ7XSKMeRyy

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

68.8.112.15:443

192.168.0.41:443

Mutex

68c72d56-7c01-4752-8b16-99645c1898fc

Attributes

encryption_key
6A865538EA2172CEA230F0158FFB3F9E7FC36141
install_name
Client.exe
log_directory
Logs
reconnect_delay
5
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/1148-1-0x00000000009B0000-0x0000000000CD4000-memory.dmp	family_quasar
behavioral1/files/0x002800000004503e-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3228	Client.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1148	Client-built.exe
Token: SeDebugPrivilege	3228	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3228	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3228	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3228	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1148 wrote to memory of 3228	1148	Client-built.exe	82
PID 1148 wrote to memory of 3228	1148	Client-built.exe	82

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1148
- 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
  PID:3228

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

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
7949ac4868bbd751e06e94d9b33b95a6

SHA1
5700606d7c246a6abf4005c0a45824071fa801aa

SHA256
2d260adb5fc05bfb17a1e56e87e2b3eb739d8febf2671fd5d3609ff3cd56bfe7

SHA512
7f27e6208e65350ab98bfec4a306059dfa098819106a85b5db9bd88c2275179054f232aa47c41d07a6433725d60a69472dd6986a6871a0bdbbdef47fb2e9c31c

Download Submit
memory/1148-0-0x00007FFA0C563000-0x00007FFA0C565000-memory.dmp

Filesize
8KB

Download
memory/1148-1-0x00000000009B0000-0x0000000000CD4000-memory.dmp

Filesize
3.1MB

Download
memory/1148-2-0x00007FFA0C560000-0x00007FFA0D022000-memory.dmp

Filesize
10.8MB

Download
memory/1148-5-0x00007FFA0C560000-0x00007FFA0D022000-memory.dmp

Filesize
10.8MB

Download
memory/3228-6-0x00007FFA0C560000-0x00007FFA0D022000-memory.dmp

Filesize
10.8MB

Download
memory/3228-7-0x00007FFA0C560000-0x00007FFA0D022000-memory.dmp

Filesize
10.8MB

Download
memory/3228-8-0x000000001D6E0000-0x000000001D730000-memory.dmp

Filesize
320KB

Download
memory/3228-9-0x000000001D7F0000-0x000000001D8A2000-memory.dmp

Filesize
712KB

Download
memory/3228-10-0x00007FFA0C560000-0x00007FFA0D022000-memory.dmp

Filesize
10.8MB

Download