quasar | c5b4e58eb2e88122301ee2569a31632857284c1a89ac2d3670cc1576ec1a6a73

Analysis

max time kernel
149s
max time network
153s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20250314-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250314-enlocale:en-usos:windows10-ltsc_2021-x64system
submitted
01/04/2025, 16:17

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General

Target

RuntimeBroker.exe
Size

3.1MB
MD5

61a3f6d8dab4b5349757ca1b7b76e2bb
SHA1

6eba02e441024178612e86ac2036c4f539305bc8
SHA256

c5b4e58eb2e88122301ee2569a31632857284c1a89ac2d3670cc1576ec1a6a73
SHA512

c96105ae7152c1cb5db73ebcd286e93988b8d3574e8a5958883fb06d397cfac65b8515745b823db3dd40b6ea157a284565b34cc170d1dc2872a3dbb78edda911
SSDEEP

49152:vvSe821/aQWl8P0lSk3aKA3Z+nUlRJ6abR3LoGdHTHHB72eh2NT:vvp821/aQWl8P0lSk3DA3Z+nUlRJ60

Score

10^/10

quasar virgen spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

VIRGEN

holefo2785-22820.portmap.host:22820

Mutex

2aade54c-f664-4620-a4fa-9372bacfbe94

Attributes

encryption_key
14B98F14C8A2574E32B0396E72660E0C80B14AC2
install_name
RuntimeBroker.exe
log_directory
Logs
reconnect_delay
1000
startup_key
Runtime Broker
subdirectory
migration

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/3096-1-0x0000000000720000-0x0000000000A44000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016a21-2.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3348	RuntimeBroker.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\migration\RuntimeBroker.exe	RuntimeBroker.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
1952	schtasks.exe
5828	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3096	RuntimeBroker.exe
Token: SeDebugPrivilege	3348	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3096 wrote to memory of 1952	3096	RuntimeBroker.exe	82
PID 3096 wrote to memory of 1952	3096	RuntimeBroker.exe	82
PID 3096 wrote to memory of 3348	3096	RuntimeBroker.exe	84
PID 3096 wrote to memory of 3348	3096	RuntimeBroker.exe	84
PID 3348 wrote to memory of 5828	3348	RuntimeBroker.exe	85
PID 3348 wrote to memory of 5828	3348	RuntimeBroker.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\RuntimeBroker.exe
"C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3096
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Windows\system32\migration\RuntimeBroker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1952
- C:\Windows\system32\migration\RuntimeBroker.exe
  "C:\Windows\system32\migration\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3348
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Windows\system32\migration\RuntimeBroker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5828

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\Local\Microsoft\CLR_v4.0\UsageLogs\RuntimeBroker.exe.log

Filesize
1KB

MD5
b08c36ce99a5ed11891ef6fc6d8647e9

SHA1
db95af417857221948eb1882e60f98ab2914bf1d

SHA256
cc9248a177495f45ec70b86c34fc5746c56730af36ace98ac7eb365dbafda674

SHA512
07e62581eace395b0a9699d727761648103180c21155d84ea09140f9e1c9690705c419118545aa67a564334bbde32710225fe3aa92b0b4b4210cb91f0058b1ea

Download Submit
C:\Windows\System32\migration\RuntimeBroker.exe

Filesize
3.1MB

MD5
61a3f6d8dab4b5349757ca1b7b76e2bb

SHA1
6eba02e441024178612e86ac2036c4f539305bc8

SHA256
c5b4e58eb2e88122301ee2569a31632857284c1a89ac2d3670cc1576ec1a6a73

SHA512
c96105ae7152c1cb5db73ebcd286e93988b8d3574e8a5958883fb06d397cfac65b8515745b823db3dd40b6ea157a284565b34cc170d1dc2872a3dbb78edda911

Download Submit
memory/3096-0-0x00007FFE5AA03000-0x00007FFE5AA05000-memory.dmp

Filesize
8KB

Download
memory/3096-1-0x0000000000720000-0x0000000000A44000-memory.dmp

Filesize
3.1MB

Download
memory/3348-5-0x00007FFE5AA00000-0x00007FFE5B4C2000-memory.dmp

Filesize
10.8MB

Download
memory/3348-6-0x000000001BF00000-0x000000001BF50000-memory.dmp

Filesize
320KB

Download
memory/3348-7-0x000000001DAC0000-0x000000001DB72000-memory.dmp

Filesize
712KB

Download
memory/3348-8-0x00007FFE5AA00000-0x00007FFE5B4C2000-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