quasar | 7d74f4b82a1de0e876f2db74e9c0e306845c43b91282a8131999813b1704e8db

Analysis

max time kernel
148s
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
06-12-2024 21:41

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General

Target

CollosalLoader.exe
Size

3.4MB
MD5

8c38855e8217b6e6ba9726e9eb2e6dbc
SHA1

dd39141900c816d4afe09492076dd32f7a66053d
SHA256

7d74f4b82a1de0e876f2db74e9c0e306845c43b91282a8131999813b1704e8db
SHA512

2017b7baee3bca4462fe8f54de139c577342a4e615808ab37e486662b52d5a7062203dc99648cdfa9fa7fca004e4d557ca0c7971069c11a28bfe430042513784
SSDEEP

49152:XvDlL26AaNeWgPhlmVqvMQ7XSK0Nmf4ar27oGd9FeTHHB72eh2NT:Xv5L26AaNeWgPhlmVqkQ7XSKSmfA

Score

10^/10

quasar clslmw3 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CLSLMW3

Fluxii-52940.portmap.host:52940

Mutex

94dacbda-c52c-4bca-bb33-6083baee5fc3

Attributes

encryption_key
FB0CEB9B14FB83E904EF6654FB1D7D8D8D43358F
install_name
CollosalLoader.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Win32
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/1596-1-0x0000000000F90000-0x00000000012F6000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b92-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2720	CollosalLoader.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

pid	Process
4192	schtasks.exe
64	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1596	CollosalLoader.exe
Token: SeDebugPrivilege	2720	CollosalLoader.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2720	CollosalLoader.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1596 wrote to memory of 4192	1596	CollosalLoader.exe	83
PID 1596 wrote to memory of 4192	1596	CollosalLoader.exe	83
PID 1596 wrote to memory of 2720	1596	CollosalLoader.exe	85
PID 1596 wrote to memory of 2720	1596	CollosalLoader.exe	85
PID 2720 wrote to memory of 64	2720	CollosalLoader.exe	86
PID 2720 wrote to memory of 64	2720	CollosalLoader.exe	86

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\CollosalLoader.exe
"C:\Users\Admin\AppData\Local\Temp\CollosalLoader.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1596
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Win32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\CollosalLoader.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4192
- C:\Users\Admin\AppData\Roaming\SubDir\CollosalLoader.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\CollosalLoader.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Win32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\CollosalLoader.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:64

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\Local\Microsoft\CLR_v4.0\UsageLogs\CollosalLoader.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\CollosalLoader.exe

Filesize
3.4MB

MD5
8c38855e8217b6e6ba9726e9eb2e6dbc

SHA1
dd39141900c816d4afe09492076dd32f7a66053d

SHA256
7d74f4b82a1de0e876f2db74e9c0e306845c43b91282a8131999813b1704e8db

SHA512
2017b7baee3bca4462fe8f54de139c577342a4e615808ab37e486662b52d5a7062203dc99648cdfa9fa7fca004e4d557ca0c7971069c11a28bfe430042513784

Download Submit
memory/1596-0-0x00007FFD41BF3000-0x00007FFD41BF5000-memory.dmp

Filesize
8KB

Download
memory/1596-1-0x0000000000F90000-0x00000000012F6000-memory.dmp

Filesize
3.4MB

Download
memory/1596-2-0x00007FFD41BF0000-0x00007FFD426B1000-memory.dmp

Filesize
10.8MB

Download
memory/1596-9-0x00007FFD41BF0000-0x00007FFD426B1000-memory.dmp

Filesize
10.8MB

Download
memory/2720-10-0x00007FFD41BF0000-0x00007FFD426B1000-memory.dmp

Filesize
10.8MB

Download
memory/2720-11-0x00007FFD41BF0000-0x00007FFD426B1000-memory.dmp

Filesize
10.8MB

Download
memory/2720-12-0x000000001BC60000-0x000000001BCB0000-memory.dmp

Filesize
320KB

Download
memory/2720-13-0x000000001C4F0000-0x000000001C5A2000-memory.dmp

Filesize
712KB

Download
memory/2720-14-0x00007FFD41BF0000-0x00007FFD426B1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads