quasar | af896d89bd5371a4236a7993a11484ddb5890bea7da569f61519dbe963216a88

Analysis

max time kernel
149s
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
14-11-2024 16:31

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General

Target

Client-built.exe
Size

3.1MB
MD5

2364bd709ace33ac4144257da2a03282
SHA1

ba2272a8f9417f422ac77d84e41a55a2ad77f980
SHA256

af896d89bd5371a4236a7993a11484ddb5890bea7da569f61519dbe963216a88
SHA512

41cd1b224a9efb2ac3abc12a55963bbf1a7bef36d27c3ec0177cd71d72684eb725120e772500685f448ad32d940f602d5f91ba1cdab0463c154ad64029f42e23
SSDEEP

49152:yvKt62XlaSFNWPjljiFa2RoUYIFxOEMklk/JxxoGdzTHHB72eh2NT:yvi62XlaSFNWPjljiFXRoUYIFx8L

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

0.tcp.us-cal-1.ngrok.io:19421

Mutex

77c9d407-6130-4e2f-8d22-c4eda6d22b1f

Attributes

encryption_key
210D68A7233E9455E4EEC5A5388A8DF203518D0F
install_name
Client.exe
log_directory
Logs
reconnect_delay
1500
startup_key
wwwwwww
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/2304-1-0x0000000000200000-0x0000000000524000-memory.dmp	family_quasar
C:\Windows\System32\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

1120 Client.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service
T1102

Processes:

flow ioc

15 0.tcp.us-cal-1.ngrok.io
64 0.tcp.us-cal-1.ngrok.io
96 0.tcp.us-cal-1.ngrok.io

pid	process
1120	Client.exe

flow	ioc
15	0.tcp.us-cal-1.ngrok.io
64	0.tcp.us-cal-1.ngrok.io
96	0.tcp.us-cal-1.ngrok.io

Drops file in System32 directory 5 IoCs

Processes:

Client.exeClient-built.exe

description	ioc	process
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client.exe
File opened for modification	C:\Windows\system32\SubDir	Client.exe
File created	C:\Windows\system32\SubDir\Client.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir	Client-built.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description pid process

Token: SeDebugPrivilege 2304 Client-built.exe
Token: SeDebugPrivilege 1120 Client.exe

description	pid	process
Token: SeDebugPrivilege	2304	Client-built.exe
Token: SeDebugPrivilege	1120	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Client-built.exe

description	pid	process	target process
PID 2304 wrote to memory of 1120	2304	Client-built.exe	Client.exe
PID 2304 wrote to memory of 1120	2304	Client-built.exe	Client.exe

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  PID:1120

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\System32\SubDir\Client.exe

Filesize
3.1MB

MD5
2364bd709ace33ac4144257da2a03282

SHA1
ba2272a8f9417f422ac77d84e41a55a2ad77f980

SHA256
af896d89bd5371a4236a7993a11484ddb5890bea7da569f61519dbe963216a88

SHA512
41cd1b224a9efb2ac3abc12a55963bbf1a7bef36d27c3ec0177cd71d72684eb725120e772500685f448ad32d940f602d5f91ba1cdab0463c154ad64029f42e23

Download Submit
memory/1120-10-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/1120-11-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/1120-12-0x0000000002630000-0x0000000002680000-memory.dmp

Filesize
320KB

Download
memory/1120-13-0x000000001B550000-0x000000001B602000-memory.dmp

Filesize
712KB

Download
memory/1120-14-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/1120-15-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/2304-0-0x00007FF9184C3000-0x00007FF9184C5000-memory.dmp

Filesize
8KB

Download
memory/2304-1-0x0000000000200000-0x0000000000524000-memory.dmp

Filesize
3.1MB

Download
memory/2304-2-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download
memory/2304-9-0x00007FF9184C0000-0x00007FF918F81000-memory.dmp

Filesize
10.8MB

Download