quasar | 544627888509e1cd5a081d030af835f7d7eac014284b606d808cb506b59b1cbe

Analysis

max time kernel
596s
max time network
602s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
13-12-2024 15:12

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

FlashingSoftwarePRO.exe
Size

3.1MB
MD5

abefc9e52207f52bf0c9f6bc69916d23
SHA1

303af0cd029199d8a95ce1a708eb9887e63b73f4
SHA256

544627888509e1cd5a081d030af835f7d7eac014284b606d808cb506b59b1cbe
SHA512

efaf7820f8eb2826bf8b1b0709916b97f704304f92ac876e467d83d3c753ad949f64d555d8df2e2e9ee211024750d3df935b6aa9d913c41ae6d125b32cf8f691
SSDEEP

49152:zvWI22SsaNYfdPBldt698dBcjHQhRJ6dbR3LoGdz1fTHHB72eh2NT:zv722SsaNYfdPBldt6+dBcjHQhRJ6vp

Score

10^/10

quasar svchost spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost

quasqy10-51732.portmap.host:4782

Mutex

a44aa8dc-482a-4560-a34f-f21ff1147a02

Attributes

encryption_key
7AC4D01862AC71A180B8FAEE5694E9D7B88EF662
install_name
svchost.exe
log_directory
Logs
reconnect_delay
1000
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/1920-1-0x0000000000020000-0x0000000000344000-memory.dmp	family_quasar
behavioral1/files/0x001b00000002aa97-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3824	svchost.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\System32	svchost.exe
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	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
4116	schtasks.exe
3388	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1920	FlashingSoftwarePRO.exe
Token: SeDebugPrivilege	3824	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3824	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 4116	1920	FlashingSoftwarePRO.exe	77
PID 1920 wrote to memory of 4116	1920	FlashingSoftwarePRO.exe	77
PID 1920 wrote to memory of 3824	1920	FlashingSoftwarePRO.exe	79
PID 1920 wrote to memory of 3824	1920	FlashingSoftwarePRO.exe	79
PID 3824 wrote to memory of 3388	3824	svchost.exe	80
PID 3824 wrote to memory of 3388	3824	svchost.exe	80

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:1920
- 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:4116
- 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:3824
- - 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:3388

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
3.1MB

MD5
abefc9e52207f52bf0c9f6bc69916d23

SHA1
303af0cd029199d8a95ce1a708eb9887e63b73f4

SHA256
544627888509e1cd5a081d030af835f7d7eac014284b606d808cb506b59b1cbe

SHA512
efaf7820f8eb2826bf8b1b0709916b97f704304f92ac876e467d83d3c753ad949f64d555d8df2e2e9ee211024750d3df935b6aa9d913c41ae6d125b32cf8f691

Download Submit
memory/1920-0-0x00007FFE1C583000-0x00007FFE1C585000-memory.dmp

Filesize
8KB

Download
memory/1920-1-0x0000000000020000-0x0000000000344000-memory.dmp

Filesize
3.1MB

Download
memory/1920-2-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/1920-10-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/3824-9-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/3824-11-0x000000001CC00000-0x000000001CC50000-memory.dmp

Filesize
320KB

Download
memory/3824-12-0x000000001CD10000-0x000000001CDC2000-memory.dmp

Filesize
712KB

Download
memory/3824-13-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads