quasar | e170577ede5b14116b8e2b3f4ccfa7865927aac68613cfd2676eef4f43819ddf

Analysis

max time kernel
149s
max time network
150s
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 06:22

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General

Target

RuntimeBroker.exe
Size

3.1MB
MD5

82761cf21801c5a88775b5b82bce7dcd
SHA1

8e4bb300478b689915d241a18b8a9da5ba21b2b9
SHA256

e170577ede5b14116b8e2b3f4ccfa7865927aac68613cfd2676eef4f43819ddf
SHA512

2c45966635f2cc9bc53af8bb9070c4bd3f7d403f81fc40f58c0a0f2b04bfcd0a150092ae7a78971a9596ae0499cff98df0748eae8caacfabdfd522141b967425
SSDEEP

98304:bvNL26AaNeWgPhlmVqkQ7XSK46lRJ6jzr:Tb4SY2

Score

10^/10

quasar runtimebroker spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RuntimeBroker

dovefey735-52034.portmap.host:52034

Mutex

c1457435-328d-4da4-8379-23c8e51865c6

Attributes

encryption_key
BEDD596FBA59B01D6913DA83A0452739FD858DE1
install_name
RuntimeBroker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RuntimeBroker
subdirectory
a7

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/5012-1-0x0000000000460000-0x0000000000784000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023ba1-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1940	RuntimeBroker.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\a7\RuntimeBroker.exe	RuntimeBroker.exe
File opened for modification	C:\Windows\system32\a7\RuntimeBroker.exe	RuntimeBroker.exe
File opened for modification	C:\Windows\system32\a7	RuntimeBroker.exe
File opened for modification	C:\Windows\system32\a7\RuntimeBroker.exe	RuntimeBroker.exe
File opened for modification	C:\Windows\system32\a7	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
1524	schtasks.exe
4984	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5012	RuntimeBroker.exe
Token: SeDebugPrivilege	1940	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1940	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5012 wrote to memory of 1524	5012	RuntimeBroker.exe	82
PID 5012 wrote to memory of 1524	5012	RuntimeBroker.exe	82
PID 5012 wrote to memory of 1940	5012	RuntimeBroker.exe	84
PID 5012 wrote to memory of 1940	5012	RuntimeBroker.exe	84
PID 1940 wrote to memory of 4984	1940	RuntimeBroker.exe	85
PID 1940 wrote to memory of 4984	1940	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:5012
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Windows\system32\a7\RuntimeBroker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1524
- C:\Windows\system32\a7\RuntimeBroker.exe
  "C:\Windows\system32\a7\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Windows\system32\a7\RuntimeBroker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4984

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\a7\RuntimeBroker.exe

Filesize
3.1MB

MD5
82761cf21801c5a88775b5b82bce7dcd

SHA1
8e4bb300478b689915d241a18b8a9da5ba21b2b9

SHA256
e170577ede5b14116b8e2b3f4ccfa7865927aac68613cfd2676eef4f43819ddf

SHA512
2c45966635f2cc9bc53af8bb9070c4bd3f7d403f81fc40f58c0a0f2b04bfcd0a150092ae7a78971a9596ae0499cff98df0748eae8caacfabdfd522141b967425

Download Submit
memory/1940-9-0x00007FFDFA730000-0x00007FFDFB1F1000-memory.dmp

Filesize
10.8MB

Download
memory/1940-10-0x000000001BDB0000-0x000000001BE00000-memory.dmp

Filesize
320KB

Download
memory/1940-11-0x000000001ED30000-0x000000001EDE2000-memory.dmp

Filesize
712KB

Download
memory/1940-12-0x00007FFDFA730000-0x00007FFDFB1F1000-memory.dmp

Filesize
10.8MB

Download
memory/5012-0-0x00007FFDFA733000-0x00007FFDFA735000-memory.dmp

Filesize
8KB

Download
memory/5012-1-0x0000000000460000-0x0000000000784000-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