quasar | 492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000c

General

Target

492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe
Size

3.1MB
MD5

b77d847b1d41cde07f81168c7addbb10
SHA1

2d5c614efdef7ab59fa5fb665d6ed1a79502b97f
SHA256

492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000c
SHA512

6fff7c253c543e370dcb459f0cc66003f57fbc35f40af5744deca97a2c593bf0881f96c845bbc15963e9eb81a652aec78a500ea41f2d1af5fbb5f0ec04c6c9f6
SSDEEP

49152:nvelL26AaNeWgPhlmVqvMQ7XSKqaRJ61bR3LoGdEjTHHB72eh2NT:nvOL26AaNeWgPhlmVqkQ7XSKqaRJ6H

Score

10^/10

quasar runtimebroker spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RuntimeBroker

C2

siembonik-44853.portmap.host:44853

Mutex

df483a08-855b-4bf5-bdcb-174788919889

Attributes

encryption_key
A8573AD4438B1D5F6207F7C03CCC7F1E2D4B13DF
install_name
RuntimeBroker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RuntimeBroker
subdirectory
am1

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2116-1-0x0000000001350000-0x0000000001674000-memory.dmp	family_quasar
behavioral1/files/0x000b000000016cab-6.dat	family_quasar
behavioral1/memory/2192-9-0x0000000000C60000-0x0000000000F84000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

RuntimeBroker.exe

pid	Process
2192	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

Processes:

schtasks.exeschtasks.exe

pid	Process
872	schtasks.exe
2960	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exeRuntimeBroker.exe

description	pid	Process
Token: SeDebugPrivilege	2116	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe
Token: SeDebugPrivilege	2192	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RuntimeBroker.exe

pid	Process
2192	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exeRuntimeBroker.exe

description	pid	Process	procid_target
PID 2116 wrote to memory of 872	2116	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	30
PID 2116 wrote to memory of 872	2116	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	30
PID 2116 wrote to memory of 872	2116	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	30
PID 2116 wrote to memory of 2192	2116	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	32
PID 2116 wrote to memory of 2192	2116	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	32
PID 2116 wrote to memory of 2192	2116	492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe	32
PID 2192 wrote to memory of 2960	2192	RuntimeBroker.exe	33
PID 2192 wrote to memory of 2960	2192	RuntimeBroker.exe	33
PID 2192 wrote to memory of 2960	2192	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\492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe
"C:\Users\Admin\AppData\Local\Temp\492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000cN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:872
- C:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe
  "C:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2192
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2960

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:\Users\Admin\AppData\Roaming\am1\RuntimeBroker.exe

Filesize
3.1MB

MD5
b77d847b1d41cde07f81168c7addbb10

SHA1
2d5c614efdef7ab59fa5fb665d6ed1a79502b97f

SHA256
492a651e5ae2020b3b7fd51861adf68402089d050e083c3a9ef1a9866256000c

SHA512
6fff7c253c543e370dcb459f0cc66003f57fbc35f40af5744deca97a2c593bf0881f96c845bbc15963e9eb81a652aec78a500ea41f2d1af5fbb5f0ec04c6c9f6

Download Submit
memory/2116-0-0x000007FEF5A63000-0x000007FEF5A64000-memory.dmp

Filesize
4KB

Download
memory/2116-1-0x0000000001350000-0x0000000001674000-memory.dmp

Filesize
3.1MB

Download
memory/2116-2-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/2116-10-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/2192-8-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/2192-9-0x0000000000C60000-0x0000000000F84000-memory.dmp

Filesize
3.1MB

Download
memory/2192-11-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/2192-12-0x000007FEF5A60000-0x000007FEF644C000-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