quasar | c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd

Analysis

max time kernel
141s
max time network
144s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
26-04-2024 06:54

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General

Target

c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe
Size

502KB
MD5

b3b85cb2f41722ce117f9413394eb11c
SHA1

7304546899bb48a3b04580327c49d71adee6a47b
SHA256

c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd
SHA512

60e1a3cdc04113cb36c52ce12444af862208b073042f80ad7c095f12b57e935435064cbda714eff2297ec6d27690812f6a11c63929e7a7a90a1c0bd3767538e3
SSDEEP

6144:1TEgdc0YNX7IxUpGREWdnkLmn9MnjM5EtqF+yw4PUcEBOb8F97UycTR3W:1TEgdfYWxUgkLZjl4YywHxpdUycdW

Score

10^/10

quasar gigabyte spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

gigabyte

87.121.52.241:4000

Mutex

565c0b54-8fec-4eb0-a932-429f55a0cc82

Attributes

encryption_key
B000736BEBDF08FC1B6696200651882CF57E43E7
install_name
gigabyte.exe
log_directory
Logs
reconnect_delay
3000
startup_key
gigabyte update
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/1696-0-0x00000000009A0000-0x0000000000A24000-memory.dmp	family_quasar
behavioral2/files/0x000200000002a9c1-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4568	gigabyte.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3944	schtasks.exe
4900	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1696	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe
Token: SeDebugPrivilege	4568	gigabyte.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4568	gigabyte.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 3944	1696	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe	81
PID 1696 wrote to memory of 3944	1696	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe	81
PID 1696 wrote to memory of 4568	1696	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe	83
PID 1696 wrote to memory of 4568	1696	c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe	83
PID 4568 wrote to memory of 4900	4568	gigabyte.exe	84
PID 4568 wrote to memory of 4900	4568	gigabyte.exe	84

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe
"C:\Users\Admin\AppData\Local\Temp\c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "gigabyte update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3944
- C:\Users\Admin\AppData\Roaming\SubDir\gigabyte.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\gigabyte.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4568
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "gigabyte update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\gigabyte.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4900

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
502KB

MD5
b3b85cb2f41722ce117f9413394eb11c

SHA1
7304546899bb48a3b04580327c49d71adee6a47b

SHA256
c39c6e705d47e5a860be8a42458cc536471d55fc5674526f7517fd972161e3cd

SHA512
60e1a3cdc04113cb36c52ce12444af862208b073042f80ad7c095f12b57e935435064cbda714eff2297ec6d27690812f6a11c63929e7a7a90a1c0bd3767538e3

Download Submit
memory/1696-0-0x00000000009A0000-0x0000000000A24000-memory.dmp

Filesize
528KB

Download
memory/1696-1-0x00007FFCF6CF0000-0x00007FFCF77B2000-memory.dmp

Filesize
10.8MB

Download
memory/1696-2-0x000000001B8B0000-0x000000001B8C0000-memory.dmp

Filesize
64KB

Download
memory/1696-9-0x00007FFCF6CF0000-0x00007FFCF77B2000-memory.dmp

Filesize
10.8MB

Download
memory/4568-8-0x00007FFCF6CF0000-0x00007FFCF77B2000-memory.dmp

Filesize
10.8MB

Download
memory/4568-10-0x000000001B8D0000-0x000000001B8E0000-memory.dmp

Filesize
64KB

Download
memory/4568-11-0x000000001B880000-0x000000001B8D0000-memory.dmp

Filesize
320KB

Download
memory/4568-12-0x000000001C0A0000-0x000000001C152000-memory.dmp

Filesize
712KB

Download
memory/4568-13-0x00007FFCF6CF0000-0x00007FFCF77B2000-memory.dmp

Filesize
10.8MB

Download
memory/4568-14-0x000000001B8D0000-0x000000001B8E0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads