quasar | 83350c38bd734b17254e270457391255342bee4c92ddab004f6f596046d16f99

Analysis

max time kernel
149s
max time network
135s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
30-10-2024 19:44

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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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2412-1-0x0000000000CE0000-0x0000000001004000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016ca5-6.dat	family_quasar
behavioral1/memory/1792-7-0x0000000000F50000-0x0000000001274000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
1792	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	2412	dontopenit.exe
Token: SeDebugPrivilege	1792	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid	Process
1792	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid	Process
1792	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

dontopenit.exe

description	pid	Process	procid_target
PID 2412 wrote to memory of 1792	2412	dontopenit.exe	32
PID 2412 wrote to memory of 1792	2412	dontopenit.exe	32
PID 2412 wrote to memory of 1792	2412	dontopenit.exe	32

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:2412
- 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:1792

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/1792-8-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download
memory/1792-7-0x0000000000F50000-0x0000000001274000-memory.dmp

Filesize
3.1MB

Download
memory/1792-9-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download
memory/1792-11-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download
memory/2412-0-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

Filesize
4KB

Download
memory/2412-1-0x0000000000CE0000-0x0000000001004000-memory.dmp

Filesize
3.1MB

Download
memory/2412-2-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download
memory/2412-10-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

Filesize
9.9MB

Download