quasar | 7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7

Analysis

max time kernel
145s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 03:28

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General

Target

7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe
Size

3.1MB
MD5

8cadd9d05b28bdf0f3caeed0ce516d9c
SHA1

b6b04039117acc2ffaef424eeaf6d99b4086487f
SHA256

7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7
SHA512

2e1c01240ac20ac2a374926893fa4796d4f4daa8f479c1c55ad62791ca0cb32cc8baf192d849abefc9c1a88d69045f4aeb563105d5d54fcac049b3b8f2ba7fee
SSDEEP

49152:zvghBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkaj3QaEfeak/l4XoGdPTHHB72eh2NT:zvSt2d5aKCuVPzlEmVQ0wvwfj3QSY

Score

10^/10

quasar manager spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Manager

serveo.net:11453

Mutex

a851cc5b-e50f-4270-9929-06c6323cdb3d

Attributes

encryption_key
5A3C537E5FB2739D5B2468FC37915D58EF4AC5EA
install_name
Runtime broker.exe
log_directory
Microsoftsessential
reconnect_delay
3000
startup_key
Runtime broker
subdirectory
Microsoft_Essentials

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/5092-1-0x0000000000DF0000-0x0000000001114000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c87-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4124	Runtime broker.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
3484	schtasks.exe
3056	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5092	7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe
Token: SeDebugPrivilege	4124	Runtime broker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5092 wrote to memory of 3484	5092	7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe	82
PID 5092 wrote to memory of 3484	5092	7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe	82
PID 5092 wrote to memory of 4124	5092	7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe	84
PID 5092 wrote to memory of 4124	5092	7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe	84
PID 4124 wrote to memory of 3056	4124	Runtime broker.exe	85
PID 4124 wrote to memory of 3056	4124	Runtime broker.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\7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe
"C:\Users\Admin\AppData\Local\Temp\7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5092
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Runtime broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3484
- C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4124
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Runtime broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3056

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\Microsoft_Essentials\Runtime broker.exe

Filesize
3.1MB

MD5
8cadd9d05b28bdf0f3caeed0ce516d9c

SHA1
b6b04039117acc2ffaef424eeaf6d99b4086487f

SHA256
7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7

SHA512
2e1c01240ac20ac2a374926893fa4796d4f4daa8f479c1c55ad62791ca0cb32cc8baf192d849abefc9c1a88d69045f4aeb563105d5d54fcac049b3b8f2ba7fee

Download Submit
memory/4124-9-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4124-11-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4124-12-0x0000000002B70000-0x0000000002BC0000-memory.dmp

Filesize
320KB

Download
memory/4124-13-0x000000001BD00000-0x000000001BDB2000-memory.dmp

Filesize
712KB

Download
memory/4124-14-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4124-15-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/5092-0-0x00007FFFFDBF3000-0x00007FFFFDBF5000-memory.dmp

Filesize
8KB

Download
memory/5092-1-0x0000000000DF0000-0x0000000001114000-memory.dmp

Filesize
3.1MB

Download
memory/5092-2-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/5092-10-0x00007FFFFDBF0000-0x00007FFFFE6B1000-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