quasar | 532a988eeae201a337f328d2120f8af790042da93735c0fc0c17a1063fdf7f60

Analysis

max time kernel
32s
max time network
33s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2024 05:46

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General

Target

Client-built1.exe
Size

3.1MB
MD5

0213a1dc625eaf82e4d4a94ef9155eeb
SHA1

af3df68c68a7070079b123ce2f22389a5aa768df
SHA256

532a988eeae201a337f328d2120f8af790042da93735c0fc0c17a1063fdf7f60
SHA512

67277e020c3776695b2fb854e834a2850dcfd378fed62b84414ead8c1dce7d1859b2799c973f599a4661124912a49c685c8438b3df7e4012ee7777b1ce489f26
SSDEEP

49152:Wvkt62XlaSFNWPjljiFa2RoUYIAQYiimzItoGdUTHHB72eh2NT:Wv462XlaSFNWPjljiFXRoUYINYiE

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.20.5:4782

Mutex

cd5c1121-523a-481c-bbf0-684c5522dd85

Attributes

encryption_key
D49DA0049C9A948B065557C5F7F0C812465A95EA
install_name
argonui.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ArgonUpdater
subdirectory
Argon

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/1248-1-0x0000000000230000-0x0000000000554000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023cae-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4404	argonui.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
3084	schtasks.exe
3352	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1248	Client-built1.exe
Token: SeDebugPrivilege	4404	argonui.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4404	argonui.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1248 wrote to memory of 3084	1248	Client-built1.exe	83
PID 1248 wrote to memory of 3084	1248	Client-built1.exe	83
PID 1248 wrote to memory of 4404	1248	Client-built1.exe	85
PID 1248 wrote to memory of 4404	1248	Client-built1.exe	85
PID 4404 wrote to memory of 3352	4404	argonui.exe	86
PID 4404 wrote to memory of 3352	4404	argonui.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\Client-built1.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built1.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1248
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "ArgonUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Argon\argonui.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3084
- C:\Users\Admin\AppData\Roaming\Argon\argonui.exe
  "C:\Users\Admin\AppData\Roaming\Argon\argonui.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4404
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "ArgonUpdater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Argon\argonui.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3352

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\Argon\argonui.exe

Filesize
3.1MB

MD5
0213a1dc625eaf82e4d4a94ef9155eeb

SHA1
af3df68c68a7070079b123ce2f22389a5aa768df

SHA256
532a988eeae201a337f328d2120f8af790042da93735c0fc0c17a1063fdf7f60

SHA512
67277e020c3776695b2fb854e834a2850dcfd378fed62b84414ead8c1dce7d1859b2799c973f599a4661124912a49c685c8438b3df7e4012ee7777b1ce489f26

Download Submit
memory/1248-0-0x00007FFF759D3000-0x00007FFF759D5000-memory.dmp

Filesize
8KB

Download
memory/1248-1-0x0000000000230000-0x0000000000554000-memory.dmp

Filesize
3.1MB

Download
memory/1248-2-0x00007FFF759D0000-0x00007FFF76491000-memory.dmp

Filesize
10.8MB

Download
memory/1248-9-0x00007FFF759D0000-0x00007FFF76491000-memory.dmp

Filesize
10.8MB

Download
memory/4404-10-0x00007FFF759D0000-0x00007FFF76491000-memory.dmp

Filesize
10.8MB

Download
memory/4404-11-0x00007FFF759D0000-0x00007FFF76491000-memory.dmp

Filesize
10.8MB

Download
memory/4404-12-0x000000001B870000-0x000000001B8C0000-memory.dmp

Filesize
320KB

Download
memory/4404-13-0x000000001B980000-0x000000001BA32000-memory.dmp

Filesize
712KB

Download
memory/4404-14-0x00007FFF759D0000-0x00007FFF76491000-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