quasar | 83350c38bd734b17254e270457391255342bee4c92ddab004f6f596046d16f99

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-10-2024 19:55

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General

Target

dontopenit.exe
Size

3.1MB
MD5

7fd77d009a68f6f02a75522b7e4a6313
SHA1

a9b761e5fa44b73e1c25c20c841c83218d101263
SHA256

83350c38bd734b17254e270457391255342bee4c92ddab004f6f596046d16f99
SHA512

536af6029f0abda5cb9ac8091da76c06f15523a10c0cf62760e10afc8baa6ea87189f3d2a3b2b60e730143f300fafc7d19b840ae699e2a288856c389095670f0
SSDEEP

49152:evOI22SsaNYfdPBldt698dBcjHbldoVbR7LoGdyCpTHHB72eh2NT:evj22SsaNYfdPBldt6+dBcjHbro7iC

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.110:4782

Mutex

9ae8867e-1e6e-4f06-8e37-de9b7ca8fb38

Attributes

encryption_key
10D13D0E0DCD8176DAECB5FC539327CF4C7855AA
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 family
quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3972-1-0x0000000000530000-0x0000000000854000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c8c-6.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
2872	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

Processes:

dontopenit.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	3972	dontopenit.exe
Token: SeDebugPrivilege	2872	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid	Process
2872	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid	Process
2872	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

dontopenit.exe

description	pid	Process	procid_target
PID 3972 wrote to memory of 2872	3972	dontopenit.exe	87
PID 3972 wrote to memory of 2872	3972	dontopenit.exe	87

C:\Users\Admin\AppData\Local\Temp\dontopenit.exe
"C:\Users\Admin\AppData\Local\Temp\dontopenit.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3972
- 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
  PID:2872

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
7fd77d009a68f6f02a75522b7e4a6313

SHA1
a9b761e5fa44b73e1c25c20c841c83218d101263

SHA256
83350c38bd734b17254e270457391255342bee4c92ddab004f6f596046d16f99

SHA512
536af6029f0abda5cb9ac8091da76c06f15523a10c0cf62760e10afc8baa6ea87189f3d2a3b2b60e730143f300fafc7d19b840ae699e2a288856c389095670f0

Download Submit
memory/2872-9-0x00007FF94C4D0000-0x00007FF94CF91000-memory.dmp

Filesize
10.8MB

Download
memory/2872-10-0x00007FF94C4D0000-0x00007FF94CF91000-memory.dmp

Filesize
10.8MB

Download
memory/2872-11-0x000000001C3D0000-0x000000001C420000-memory.dmp

Filesize
320KB

Download
memory/2872-12-0x000000001C4E0000-0x000000001C592000-memory.dmp

Filesize
712KB

Download
memory/2872-13-0x00007FF94C4D0000-0x00007FF94CF91000-memory.dmp

Filesize
10.8MB

Download
memory/3972-0-0x00007FF94C4D3000-0x00007FF94C4D5000-memory.dmp

Filesize
8KB

Download
memory/3972-1-0x0000000000530000-0x0000000000854000-memory.dmp

Filesize
3.1MB

Download
memory/3972-2-0x00007FF94C4D0000-0x00007FF94CF91000-memory.dmp

Filesize
10.8MB

Download
memory/3972-8-0x00007FF94C4D0000-0x00007FF94CF91000-memory.dmp

Filesize
10.8MB

Download