quasar | 8b227695aca3b38ba8c88ecaade8ef7cf197270b2f423b992cdce647308e586d

Analysis

max time kernel
137s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
01/04/2025, 16:15

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General

Target

RuntimeBroker.exe
Size

3.1MB
MD5

613989e76e4428defcb477aa032ff26b
SHA1

11f3147ebd49c20bd957c6b1b0255ffe2382d24c
SHA256

8b227695aca3b38ba8c88ecaade8ef7cf197270b2f423b992cdce647308e586d
SHA512

8a6b3450fab0e4af69fe7f285cd507f25d65f3264e27f79e1de1c713383620e71a1dd60d47e041ae1b66961847551736fad92abe1af51865b47766e4c8d2eaf1
SSDEEP

49152:PvSe821/aQWl8P0lSk3aKA3Z+nvTw3uarXLoGdzTHHB72eh2NT:Pvp821/aQWl8P0lSk3DA3Z+nc3j

Score

10^/10

quasar virgen spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

VIRGEN

holefo2785-22820.portmap.host:22820

Mutex

c423e76a-260b-4d6a-90d7-cf71bdc4af8b

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/6000-1-0x0000000000B30000-0x0000000000E54000-memory.dmp	family_quasar
behavioral1/files/0x000800000002428b-4.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
440	RuntimeBroker.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\migration\RuntimeBroker.exe	RuntimeBroker.exe
File opened for modification	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
2096	schtasks.exe
532	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	6000	RuntimeBroker.exe
Token: SeDebugPrivilege	440	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 6000 wrote to memory of 2096	6000	RuntimeBroker.exe	91
PID 6000 wrote to memory of 2096	6000	RuntimeBroker.exe	91
PID 6000 wrote to memory of 440	6000	RuntimeBroker.exe	93
PID 6000 wrote to memory of 440	6000	RuntimeBroker.exe	93
PID 440 wrote to memory of 532	440	RuntimeBroker.exe	94
PID 440 wrote to memory of 532	440	RuntimeBroker.exe	94

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:6000
- 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:2096
- 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:440
- - 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:532

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
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

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

Filesize
3.1MB

MD5
613989e76e4428defcb477aa032ff26b

SHA1
11f3147ebd49c20bd957c6b1b0255ffe2382d24c

SHA256
8b227695aca3b38ba8c88ecaade8ef7cf197270b2f423b992cdce647308e586d

SHA512
8a6b3450fab0e4af69fe7f285cd507f25d65f3264e27f79e1de1c713383620e71a1dd60d47e041ae1b66961847551736fad92abe1af51865b47766e4c8d2eaf1

Download Submit
memory/440-8-0x00007FF9B00B0000-0x00007FF9B0B71000-memory.dmp

Filesize
10.8MB

Download
memory/440-9-0x000000001BF70000-0x000000001BFC0000-memory.dmp

Filesize
320KB

Download
memory/440-10-0x000000001D4C0000-0x000000001D572000-memory.dmp

Filesize
712KB

Download
memory/440-11-0x00007FF9B00B0000-0x00007FF9B0B71000-memory.dmp

Filesize
10.8MB

Download
memory/6000-0-0x00007FF9B00B3000-0x00007FF9B00B5000-memory.dmp

Filesize
8KB

Download
memory/6000-1-0x0000000000B30000-0x0000000000E54000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads