quasar | 781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553

Analysis

max time kernel
149s
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
18-12-2024 13:54

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General

Target

781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.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/1376-1-0x0000000000FC0000-0x00000000012E4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b80-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3992	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
1780	schtasks.exe
5036	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1376	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe
Token: SeDebugPrivilege	3992	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3992	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 1780	1376	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	83
PID 1376 wrote to memory of 1780	1376	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	83
PID 1376 wrote to memory of 3992	1376	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	85
PID 1376 wrote to memory of 3992	1376	781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe	85
PID 3992 wrote to memory of 5036	3992	Client.exe	86
PID 3992 wrote to memory of 5036	3992	Client.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\781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe
"C:\Users\Admin\AppData\Local\Temp\781cdac62a589c52b2fb004eb53b262d4c2c29229cbbbd19a16d1669237ae553.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1376
- 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:1780
- 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:3992
- - 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:5036

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/1376-1-0x0000000000FC0000-0x00000000012E4000-memory.dmp

Filesize
3.1MB

Download
memory/1376-0-0x00007FF8FC723000-0x00007FF8FC725000-memory.dmp

Filesize
8KB

Download
memory/1376-2-0x00007FF8FC720000-0x00007FF8FD1E1000-memory.dmp

Filesize
10.8MB

Download
memory/1376-9-0x00007FF8FC720000-0x00007FF8FD1E1000-memory.dmp

Filesize
10.8MB

Download
memory/3992-10-0x00007FF8FC720000-0x00007FF8FD1E1000-memory.dmp

Filesize
10.8MB

Download
memory/3992-11-0x00007FF8FC720000-0x00007FF8FD1E1000-memory.dmp

Filesize
10.8MB

Download
memory/3992-12-0x000000001BCF0000-0x000000001BD40000-memory.dmp

Filesize
320KB

Download
memory/3992-13-0x000000001BE00000-0x000000001BEB2000-memory.dmp

Filesize
712KB

Download
memory/3992-14-0x00007FF8FC720000-0x00007FF8FD1E1000-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