quasar | 2f520d7a0fa1e9bc4ac89ba09ae327246eb7967cb6dc3fe529cbe39a247fc9e2

General

Target

FlashingSoftwarePRO.exe
Size

3.1MB
MD5

63f4446dcf7172741331aebf789e65e8
SHA1

f2801d183d9348e511cdc538430c10b5a473101b
SHA256

2f520d7a0fa1e9bc4ac89ba09ae327246eb7967cb6dc3fe529cbe39a247fc9e2
SHA512

834151cb08c23d63a8ab9260ea462c1f729a43e77f00889c2938856a537bd5069602a4ca234df9e6860bb04e77ee041c06679eceba4911590f5fb74cbb48f145
SSDEEP

49152:SvTI22SsaNYfdPBldt698dBcjHQSG1mzILoGdfkTHHB72eh2NT:Svs22SsaNYfdPBldt6+dBcjHQSGTP

Score

10^/10

quasar svchost spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost

C2

quasqy10-51732.portmap.host:4782

Mutex

ab8cd83d-dff8-496a-bfc6-7a96594a1bfb

Attributes

encryption_key
BDB44181C868606DFCA1741A69056AAA62DADEFC
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RuntimeBroker
subdirectory
System32

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/4536-1-0x0000000000D70000-0x0000000001094000-memory.dmp	family_quasar
behavioral1/files/0x0007000000023cad-4.dat	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
4448	svchost.exe
4508	svchost.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\system32\System32\svchost.exe	FlashingSoftwarePRO.exe
File opened for modification	C:\Windows\system32\System32\svchost.exe	FlashingSoftwarePRO.exe
File opened for modification	C:\Windows\system32\System32	FlashingSoftwarePRO.exe
File opened for modification	C:\Windows\system32\System32	svchost.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
4556	schtasks.exe
5052	schtasks.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4536	FlashingSoftwarePRO.exe
Token: SeDebugPrivilege	4448	svchost.exe
Token: SeDebugPrivilege	4508	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4448	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 4556	4536	FlashingSoftwarePRO.exe	83
PID 4536 wrote to memory of 4556	4536	FlashingSoftwarePRO.exe	83
PID 4536 wrote to memory of 4448	4536	FlashingSoftwarePRO.exe	85
PID 4536 wrote to memory of 4448	4536	FlashingSoftwarePRO.exe	85
PID 4448 wrote to memory of 5052	4448	svchost.exe	86
PID 4448 wrote to memory of 5052	4448	svchost.exe	86

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\FlashingSoftwarePRO.exe
"C:\Users\Admin\AppData\Local\Temp\FlashingSoftwarePRO.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Windows\system32\System32\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4556
- C:\Windows\system32\System32\svchost.exe
  "C:\Windows\system32\System32\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Windows\system32\System32\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:5052

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:2088

C:\Windows\System32\System32\svchost.exe
"C:\Windows\System32\System32\svchost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4508

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\System32\svchost.exe

Filesize
3.1MB

MD5
63f4446dcf7172741331aebf789e65e8

SHA1
f2801d183d9348e511cdc538430c10b5a473101b

SHA256
2f520d7a0fa1e9bc4ac89ba09ae327246eb7967cb6dc3fe529cbe39a247fc9e2

SHA512
834151cb08c23d63a8ab9260ea462c1f729a43e77f00889c2938856a537bd5069602a4ca234df9e6860bb04e77ee041c06679eceba4911590f5fb74cbb48f145

Download Submit
memory/4448-8-0x00007FFC04310000-0x00007FFC04DD1000-memory.dmp

Filesize
10.8MB

Download
memory/4448-10-0x000000001EC70000-0x000000001ECC0000-memory.dmp

Filesize
320KB

Download
memory/4448-11-0x000000001ED80000-0x000000001EE32000-memory.dmp

Filesize
712KB

Download
memory/4448-12-0x00007FFC04310000-0x00007FFC04DD1000-memory.dmp

Filesize
10.8MB

Download
memory/4448-13-0x000000001F7B0000-0x000000001FCD8000-memory.dmp

Filesize
5.2MB

Download
memory/4536-0-0x00007FFC04313000-0x00007FFC04315000-memory.dmp

Filesize
8KB

Download
memory/4536-1-0x0000000000D70000-0x0000000001094000-memory.dmp

Filesize
3.1MB

Download
memory/4536-2-0x00007FFC04310000-0x00007FFC04DD1000-memory.dmp

Filesize
10.8MB

Download
memory/4536-9-0x00007FFC04310000-0x00007FFC04DD1000-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