quasar | 841f178c15802a89ad903f05c5148bca7ef49efd9113d636cad35067be4a4164

Analysis

max time kernel
145s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 06:43

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General

Target

Client-built.exe
Size

3.1MB
MD5

1d5b1579c6cf546964a067edf15d75e6
SHA1

1d3e8bb39c7ad10f864efe0adfe8c4028a6fa332
SHA256

841f178c15802a89ad903f05c5148bca7ef49efd9113d636cad35067be4a4164
SHA512

6e9d6228928775787a4d25c1a82d36b68bb082c04cb08afb2abe93aff4d54fb25d0e216a5eb7bc11f260bfe3191259f61261556620895b5fc96e76438e354f02
SSDEEP

49152:6v+I22SsaNYfdPBldt698dBcjH7OmumzRfoGdRTHHB72eh2NT:6vz22SsaNYfdPBldt6+dBcjH7Oml

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

suport24.ddns.net:4782

Mutex

b4ad83f8-b608-477d-8395-2274bcaab6d1

Attributes

encryption_key
62EF51244AF3535A6A9C77206CD89D5BFECD7E4E
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

resource	yara_rule
behavioral2/memory/3284-1-0x0000000000940000-0x0000000000C64000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c75-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1280	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	3284	Client-built.exe
Token: SeDebugPrivilege	1280	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1280	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1280	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1280	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3284 wrote to memory of 1280	3284	Client-built.exe	83
PID 3284 wrote to memory of 1280	3284	Client-built.exe	83

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:3284
- 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:1280

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
1d5b1579c6cf546964a067edf15d75e6

SHA1
1d3e8bb39c7ad10f864efe0adfe8c4028a6fa332

SHA256
841f178c15802a89ad903f05c5148bca7ef49efd9113d636cad35067be4a4164

SHA512
6e9d6228928775787a4d25c1a82d36b68bb082c04cb08afb2abe93aff4d54fb25d0e216a5eb7bc11f260bfe3191259f61261556620895b5fc96e76438e354f02

Download Submit
memory/1280-9-0x00007FFE2E220000-0x00007FFE2ECE1000-memory.dmp

Filesize
10.8MB

Download
memory/1280-11-0x00007FFE2E220000-0x00007FFE2ECE1000-memory.dmp

Filesize
10.8MB

Download
memory/1280-12-0x000000001C180000-0x000000001C1D0000-memory.dmp

Filesize
320KB

Download
memory/1280-13-0x000000001C290000-0x000000001C342000-memory.dmp

Filesize
712KB

Download
memory/1280-14-0x00007FFE2E220000-0x00007FFE2ECE1000-memory.dmp

Filesize
10.8MB

Download
memory/3284-0-0x00007FFE2E223000-0x00007FFE2E225000-memory.dmp

Filesize
8KB

Download
memory/3284-1-0x0000000000940000-0x0000000000C64000-memory.dmp

Filesize
3.1MB

Download
memory/3284-2-0x00007FFE2E220000-0x00007FFE2ECE1000-memory.dmp

Filesize
10.8MB

Download
memory/3284-10-0x00007FFE2E220000-0x00007FFE2ECE1000-memory.dmp

Filesize
10.8MB

Download