quasar | e170577ede5b14116b8e2b3f4ccfa7865927aac68613cfd2676eef4f43819ddf

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

C2

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 3 IoCs

resource	yara_rule
behavioral1/memory/1968-1-0x0000000000FB0000-0x00000000012D4000-memory.dmp	family_quasar
behavioral1/files/0x000700000001945b-6.dat	family_quasar
behavioral1/memory/2548-9-0x0000000000F40000-0x0000000001264000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2548	RuntimeBroker.exe

Drops file in System32 directory 5 IoCs

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

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
1936	schtasks.exe
2192	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1968	RuntimeBroker.exe
Token: SeDebugPrivilege	2548	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2548	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 1936	1968	RuntimeBroker.exe	30
PID 1968 wrote to memory of 1936	1968	RuntimeBroker.exe	30
PID 1968 wrote to memory of 1936	1968	RuntimeBroker.exe	30
PID 1968 wrote to memory of 2548	1968	RuntimeBroker.exe	32
PID 1968 wrote to memory of 2548	1968	RuntimeBroker.exe	32
PID 1968 wrote to memory of 2548	1968	RuntimeBroker.exe	32
PID 2548 wrote to memory of 2192	2548	RuntimeBroker.exe	33
PID 2548 wrote to memory of 2192	2548	RuntimeBroker.exe	33
PID 2548 wrote to memory of 2192	2548	RuntimeBroker.exe	33

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:1968
- 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:1936
- 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:2548
- - 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:2192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\a7\RuntimeBroker.exe

Filesize
3.1MB

MD5
82761cf21801c5a88775b5b82bce7dcd

SHA1
8e4bb300478b689915d241a18b8a9da5ba21b2b9

SHA256
e170577ede5b14116b8e2b3f4ccfa7865927aac68613cfd2676eef4f43819ddf

SHA512
2c45966635f2cc9bc53af8bb9070c4bd3f7d403f81fc40f58c0a0f2b04bfcd0a150092ae7a78971a9596ae0499cff98df0748eae8caacfabdfd522141b967425

Download Submit
memory/1968-0-0x000007FEF5DC3000-0x000007FEF5DC4000-memory.dmp

Filesize
4KB

Download
memory/1968-1-0x0000000000FB0000-0x00000000012D4000-memory.dmp

Filesize
3.1MB

Download
memory/1968-2-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/1968-8-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2548-10-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2548-9-0x0000000000F40000-0x0000000001264000-memory.dmp

Filesize
3.1MB

Download
memory/2548-11-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2548-12-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads