quasar | fdb43a2f99ffb4ac9cd2a2a0eeffa531de224b45f4b8cce0bd700a89f1f54e01

Analysis

max time kernel
136s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-12-2024 10:07

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General

Target

Client-built.exe
Size

3.1MB
MD5

3c8875bb8a38b7b3a8ae874e24461da5
SHA1

c2cbcf60e8c3639ec777fbdd614c97a5ae854117
SHA256

fdb43a2f99ffb4ac9cd2a2a0eeffa531de224b45f4b8cce0bd700a89f1f54e01
SHA512

23c8975c12f5d88bbb3845b0154f3bb3ea4e24bdc98f571a3ecb61cfbbc0aa25cbbb0176d2ab990c811c1d15ff7ba1fb92a185bad2c52114e7d0fdf721009f53
SSDEEP

49152:6vUt62XlaSFNWPjljiFa2RoUYIVa6uEBDik/SZoGd8THHB72eh2NT:6vI62XlaSFNWPjljiFXRoUYIVa6q

Score

10^/10

quasar kys spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

kys

192.168.100.2:4444

Mutex

87964754-44e1-4ed3-a66e-f8de30cfe006

Attributes

encryption_key
6B74F0C858B7E90573D4E97997F2A082B9781250
install_name
Panel.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Panel
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/1676-1-0x0000000000AE0000-0x0000000000E04000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c91-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4240	Panel.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Panel.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\Panel.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\Panel.exe	Panel.exe
File opened for modification	C:\Windows\system32\SubDir	Panel.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
4008	schtasks.exe
624	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1676	Client-built.exe
Token: SeDebugPrivilege	4240	Panel.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4240	Panel.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 4008	1676	Client-built.exe	83
PID 1676 wrote to memory of 4008	1676	Client-built.exe	83
PID 1676 wrote to memory of 4240	1676	Client-built.exe	85
PID 1676 wrote to memory of 4240	1676	Client-built.exe	85
PID 4240 wrote to memory of 624	4240	Panel.exe	86
PID 4240 wrote to memory of 624	4240	Panel.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-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Panel" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Panel.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4008
- C:\Windows\system32\SubDir\Panel.exe
  "C:\Windows\system32\SubDir\Panel.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4240
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Panel" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Panel.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:624

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:\Windows\System32\SubDir\Panel.exe

Filesize
3.1MB

MD5
3c8875bb8a38b7b3a8ae874e24461da5

SHA1
c2cbcf60e8c3639ec777fbdd614c97a5ae854117

SHA256
fdb43a2f99ffb4ac9cd2a2a0eeffa531de224b45f4b8cce0bd700a89f1f54e01

SHA512
23c8975c12f5d88bbb3845b0154f3bb3ea4e24bdc98f571a3ecb61cfbbc0aa25cbbb0176d2ab990c811c1d15ff7ba1fb92a185bad2c52114e7d0fdf721009f53

Download Submit
memory/1676-0-0x00007FFC7BC93000-0x00007FFC7BC95000-memory.dmp

Filesize
8KB

Download
memory/1676-1-0x0000000000AE0000-0x0000000000E04000-memory.dmp

Filesize
3.1MB

Download
memory/1676-2-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

Filesize
10.8MB

Download
memory/1676-9-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

Filesize
10.8MB

Download
memory/4240-10-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

Filesize
10.8MB

Download
memory/4240-11-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

Filesize
10.8MB

Download
memory/4240-12-0x000000001BA70000-0x000000001BAC0000-memory.dmp

Filesize
320KB

Download
memory/4240-13-0x000000001BB80000-0x000000001BC32000-memory.dmp

Filesize
712KB

Download
memory/4240-14-0x00007FFC7BC90000-0x00007FFC7C751000-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