quasar | 06c4c62665a3434d66fae0cbaebdb2a5f6905bba8ccc333205059ea13e99b135

Analysis

max time kernel
137s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-11-2024 17:18

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General

Target

Client-built.exe
Size

3.2MB
MD5

986dc7301d3af14a13e54ee6b3963451
SHA1

4b110fb4248b17b92aa3b3010bc31bb0bd4d1b10
SHA256

06c4c62665a3434d66fae0cbaebdb2a5f6905bba8ccc333205059ea13e99b135
SHA512

60f454f655c69d047f901eb4abfe8667e98176ba4c51bc4ab9389c714a610d0c7c2b1d2fe80ed7e4db86e4230e2e5de8efc899647788bb5e3a101e762d6281d2
SSDEEP

49152:mv+lL26AaNeWgPhlmVqvMQ7XSK7K63Lar/LoGdlTHHB72eh2NTS:mvuL26AaNeWgPhlmVqkQ7XSKT3Ub

Score

10^/10

quasar t254 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

t254

t2558628-45777.portmap.host:45777

Mutex

932c65d6-da03-4072-adb9-2376e00c0a8e

Attributes

encryption_key
236980CA68F0687D520534421E23683400294B98
install_name
Client.exe
log_directory
Windows_Logs
reconnect_delay
3000
startup_key
Windows defender startup client
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/2980-1-0x00000000000B0000-0x00000000003EE000-memory.dmp	family_quasar
behavioral2/files/0x00050000000230d8-8.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid	Process
1392	Client.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exe

pid	Process
2724	schtasks.exe
2020	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	2980	Client-built.exe
Token: SeDebugPrivilege	1392	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
1392	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Client-built.exeClient.exe

description	pid	Process	procid_target
PID 2980 wrote to memory of 2724	2980	Client-built.exe	87
PID 2980 wrote to memory of 2724	2980	Client-built.exe	87
PID 2980 wrote to memory of 1392	2980	Client-built.exe	89
PID 2980 wrote to memory of 1392	2980	Client-built.exe	89
PID 1392 wrote to memory of 2020	1392	Client.exe	90
PID 1392 wrote to memory of 2020	1392	Client.exe	90

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows defender startup client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2724
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1392
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows defender startup client" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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\Client.exe

Filesize
3.2MB

MD5
986dc7301d3af14a13e54ee6b3963451

SHA1
4b110fb4248b17b92aa3b3010bc31bb0bd4d1b10

SHA256
06c4c62665a3434d66fae0cbaebdb2a5f6905bba8ccc333205059ea13e99b135

SHA512
60f454f655c69d047f901eb4abfe8667e98176ba4c51bc4ab9389c714a610d0c7c2b1d2fe80ed7e4db86e4230e2e5de8efc899647788bb5e3a101e762d6281d2

Download Submit
memory/1392-9-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/1392-11-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/1392-12-0x000000001BD30000-0x000000001BD80000-memory.dmp

Filesize
320KB

Download
memory/1392-13-0x000000001BE40000-0x000000001BEF2000-memory.dmp

Filesize
712KB

Download
memory/1392-14-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/2980-0-0x00007FFD674E3000-0x00007FFD674E5000-memory.dmp

Filesize
8KB

Download
memory/2980-1-0x00000000000B0000-0x00000000003EE000-memory.dmp

Filesize
3.2MB

Download
memory/2980-2-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download
memory/2980-10-0x00007FFD674E0000-0x00007FFD67FA1000-memory.dmp

Filesize
10.8MB

Download