quasar | 781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-12-2024 06:26

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General

Target

vanilla.exe
Size

3.1MB
MD5

7b168e023b1876cd9163d58f98f3b67c
SHA1

906a5cfacd3797c603f3efe863aaedeabacb5918
SHA256

781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553
SHA512

bed18054e9fce2cdc185e4536386d042f20d98c9354e1603bb87b8747403e63bdbabfb88e72708dcdfb3468860655dcb34b237024d3395782c092dd772fec518
SSDEEP

49152:avkt62XlaSFNWPjljiFa2RoUYIlBRJ63bR3LoGdGFTHHB72eh2NT:av462XlaSFNWPjljiFXRoUYIlBRJ6J

Score

10^/10

quasar runtimebroker spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RunTimeBroker

98.51.190.130:20

Mutex

11bbf22e-826e-486b-b024-adbd86228a9e

Attributes

encryption_key
7A589EDBC6A581E125BF830EF0D05FC74BB75E30
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ctfmon
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/3484-1-0x0000000000630000-0x0000000000954000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b8d-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4636	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

pid	Process
4668	schtasks.exe
3548	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3484	vanilla.exe
Token: SeDebugPrivilege	4636	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4636	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3484 wrote to memory of 4668	3484	vanilla.exe	82
PID 3484 wrote to memory of 4668	3484	vanilla.exe	82
PID 3484 wrote to memory of 4636	3484	vanilla.exe	84
PID 3484 wrote to memory of 4636	3484	vanilla.exe	84
PID 4636 wrote to memory of 3548	4636	Client.exe	85
PID 4636 wrote to memory of 3548	4636	Client.exe	85

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\vanilla.exe
"C:\Users\Admin\AppData\Local\Temp\vanilla.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3484
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4668
- 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:4636
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3548

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
3.1MB

MD5
7b168e023b1876cd9163d58f98f3b67c

SHA1
906a5cfacd3797c603f3efe863aaedeabacb5918

SHA256
781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553

SHA512
bed18054e9fce2cdc185e4536386d042f20d98c9354e1603bb87b8747403e63bdbabfb88e72708dcdfb3468860655dcb34b237024d3395782c092dd772fec518

Download Submit
memory/3484-0-0x00007FF9024F3000-0x00007FF9024F5000-memory.dmp

Filesize
8KB

Download
memory/3484-1-0x0000000000630000-0x0000000000954000-memory.dmp

Filesize
3.1MB

Download
memory/3484-2-0x00007FF9024F0000-0x00007FF902FB1000-memory.dmp

Filesize
10.8MB

Download
memory/3484-10-0x00007FF9024F0000-0x00007FF902FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4636-9-0x00007FF9024F0000-0x00007FF902FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4636-11-0x00007FF9024F0000-0x00007FF902FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4636-12-0x000000001D650000-0x000000001D6A0000-memory.dmp

Filesize
320KB

Download
memory/4636-13-0x000000001D760000-0x000000001D812000-memory.dmp

Filesize
712KB

Download
memory/4636-16-0x000000001D700000-0x000000001D712000-memory.dmp

Filesize
72KB

Download
memory/4636-17-0x000000001DE60000-0x000000001DE9C000-memory.dmp

Filesize
240KB

Download
memory/4636-18-0x00007FF9024F0000-0x00007FF902FB1000-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