quasar | e2e1bf7f08cd2cfcdd1ab74b90b9c4120422afc319d76c32fe3f3d5f9f4a3b82

Resubmissions

21-12-2024 14:41

241221-r2vtqs1phj 10

21-12-2024 14:38

241221-rzrz3a1pdr 10

Analysis

max time kernel
149s
max time network
151s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
21-12-2024 14:38

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General

Target

FlashingSoftwarePRO.exe
Size

3.1MB
MD5

3608197a5b870e97c7917a655f8c9240
SHA1

41e8d3be8c0a44c99bd026d6169b5b001a052b8e
SHA256

e2e1bf7f08cd2cfcdd1ab74b90b9c4120422afc319d76c32fe3f3d5f9f4a3b82
SHA512

ece2a0e33402644d693e66924d7d0cb25f73f3d4bddb78d724c846ebb423af79ec60f2d12c85643e6b6e174f02fce68419b8721341b4cff4c81a4dacac36aee9
SSDEEP

49152:vv4e821/aQWl8P0lSk3aKA3Z+n0eRJ6mbR3LoGd3THHB72eh2NT:vvj821/aQWl8P0lSk3DA3Z+n0eRJ6g

Score

10^/10

quasar svchost spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost

7.tcp.eu.ngrok.io:10771

7.tcp.eu.ngrok.io:4782

4.tcp.eu.ngrok.io:4782

4.tcp.eu.ngrok.io:11979

Mutex

43540180-8ea4-4fe9-9ada-4b4c6886888b

Attributes

encryption_key
BDB44181C868606DFCA1741A69056AAA62DADEFC
install_name
svchost.exe
log_directory
Logs
reconnect_delay
300
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/5544-1-0x0000000000DD0000-0x00000000010F4000-memory.dmp	family_quasar
behavioral1/files/0x002800000004618c-3.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4316	svchost.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 5 IoCs

Web Service

T1102

flow	ioc
13	7.tcp.eu.ngrok.io
35	4.tcp.eu.ngrok.io
49	4.tcp.eu.ngrok.io
55	7.tcp.eu.ngrok.io
60	4.tcp.eu.ngrok.io

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\System32	FlashingSoftwarePRO.exe
File opened for modification	C:\Windows\system32\System32	svchost.exe
File created	C:\Windows\system32\System32\svchost.exe	FlashingSoftwarePRO.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
3384	schtasks.exe
5080	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5544	FlashingSoftwarePRO.exe
Token: SeDebugPrivilege	4316	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4316	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5544 wrote to memory of 3384	5544	FlashingSoftwarePRO.exe	82
PID 5544 wrote to memory of 3384	5544	FlashingSoftwarePRO.exe	82
PID 5544 wrote to memory of 4316	5544	FlashingSoftwarePRO.exe	84
PID 5544 wrote to memory of 4316	5544	FlashingSoftwarePRO.exe	84
PID 4316 wrote to memory of 5080	4316	svchost.exe	85
PID 4316 wrote to memory of 5080	4316	svchost.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\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:5544
- 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:3384
- 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:4316
- - 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:5080

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

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Windows\System32\System32\svchost.exe

Filesize
3.1MB

MD5
3608197a5b870e97c7917a655f8c9240

SHA1
41e8d3be8c0a44c99bd026d6169b5b001a052b8e

SHA256
e2e1bf7f08cd2cfcdd1ab74b90b9c4120422afc319d76c32fe3f3d5f9f4a3b82

SHA512
ece2a0e33402644d693e66924d7d0cb25f73f3d4bddb78d724c846ebb423af79ec60f2d12c85643e6b6e174f02fce68419b8721341b4cff4c81a4dacac36aee9

Download Submit
memory/4316-6-0x00007FFDEB030000-0x00007FFDEBAF2000-memory.dmp

Filesize
10.8MB

Download
memory/4316-7-0x000000001D150000-0x000000001D1A0000-memory.dmp

Filesize
320KB

Download
memory/4316-8-0x000000001D260000-0x000000001D312000-memory.dmp

Filesize
712KB

Download
memory/4316-9-0x00007FFDEB030000-0x00007FFDEBAF2000-memory.dmp

Filesize
10.8MB

Download
memory/5544-0-0x00007FFDEB033000-0x00007FFDEB035000-memory.dmp

Filesize
8KB

Download
memory/5544-1-0x0000000000DD0000-0x00000000010F4000-memory.dmp

Filesize
3.1MB

Download
memory/5544-2-0x00007FFDEB030000-0x00007FFDEBAF2000-memory.dmp

Filesize
10.8MB

Download
memory/5544-5-0x00007FFDEB030000-0x00007FFDEBAF2000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads