quasar | cefc4a374827abbf22fbf34da0a020a564af27e6128281a26b253a55b4c7c613

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 19:27

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General

Target

Client-built.exe
Size

3.1MB
MD5

c779ed74bff5ce61c85a033f24e36ba6
SHA1

34eb56d8f75aa37b912f4a0efbdb3a95b3fe55db
SHA256

cefc4a374827abbf22fbf34da0a020a564af27e6128281a26b253a55b4c7c613
SHA512

ae7868c78bdd1afe9971d8424ddeac53b22452cf29ef4146416a7a988f64b5d1f7913718ca0e73af77646d0a0afb0fde528fc794ca9540a8d2e24b4ce3e73b6c
SSDEEP

49152:evht62XlaSFNWPjljiFa2RoUYIeuRJ6ZbR3LoGd2hPTHHB72eh2NT:evL62XlaSFNWPjljiFXRoUYIeuRJ6bo

Score

10^/10

quasar seror0x spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SEROR0X

192.168.1.20:4782

Mutex

b27f4012-47c7-475d-a03a-00f905b66b14

Attributes

encryption_key
8B2F470BFD440CA7BEAC354C6384288FF85968FB
install_name
Windows.exe
log_directory
Error Logs
reconnect_delay
3000
startup_key
Windows
subdirectory
Windows

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/944-0-0x0000000000DF0000-0x0000000001114000-memory.dmp	family_quasar
behavioral2/files/0x000800000002342d-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1732	Windows.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
2140	schtasks.exe
2740	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	944	Client-built.exe
Token: SeDebugPrivilege	1732	Windows.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1732	Windows.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1732	Windows.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1732	Windows.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 944 wrote to memory of 2140	944	Client-built.exe	89
PID 944 wrote to memory of 2140	944	Client-built.exe	89
PID 944 wrote to memory of 1732	944	Client-built.exe	91
PID 944 wrote to memory of 1732	944	Client-built.exe	91
PID 1732 wrote to memory of 2740	1732	Windows.exe	92
PID 1732 wrote to memory of 2740	1732	Windows.exe	92

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:944
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Windows.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2140
- C:\Users\Admin\AppData\Roaming\Windows\Windows.exe
  "C:\Users\Admin\AppData\Roaming\Windows\Windows.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1732
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Windows.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2740

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Windows\Windows.exe

Filesize
3.1MB

MD5
c779ed74bff5ce61c85a033f24e36ba6

SHA1
34eb56d8f75aa37b912f4a0efbdb3a95b3fe55db

SHA256
cefc4a374827abbf22fbf34da0a020a564af27e6128281a26b253a55b4c7c613

SHA512
ae7868c78bdd1afe9971d8424ddeac53b22452cf29ef4146416a7a988f64b5d1f7913718ca0e73af77646d0a0afb0fde528fc794ca9540a8d2e24b4ce3e73b6c

Download Submit
memory/944-0-0x0000000000DF0000-0x0000000001114000-memory.dmp

Filesize
3.1MB

Download
memory/944-1-0x00007FF83F760000-0x00007FF840221000-memory.dmp

Filesize
10.8MB

Download
memory/944-2-0x000000001BE40000-0x000000001BE50000-memory.dmp

Filesize
64KB

Download
memory/944-9-0x00007FF83F760000-0x00007FF840221000-memory.dmp

Filesize
10.8MB

Download
memory/1732-10-0x00007FF83F760000-0x00007FF840221000-memory.dmp

Filesize
10.8MB

Download
memory/1732-11-0x0000000001070000-0x0000000001080000-memory.dmp

Filesize
64KB

Download
memory/1732-12-0x000000001BD30000-0x000000001BD80000-memory.dmp

Filesize
320KB

Download
memory/1732-13-0x000000001BE40000-0x000000001BEF2000-memory.dmp

Filesize
712KB

Download
memory/1732-14-0x00007FF83F760000-0x00007FF840221000-memory.dmp

Filesize
10.8MB

Download
memory/1732-15-0x0000000001070000-0x0000000001080000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads