quasar | f0b341cff383ba4f0143639eb0515fbdc023b8c98815a4f72191114ab75799b6

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18/12/2024, 19:06

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General

Target

Client-built.exe
Size

3.1MB
MD5

4a0c6269f041778479be25c053014de1
SHA1

7474c9d50ab9e48e165df40cfb5d45873429c1b3
SHA256

f0b341cff383ba4f0143639eb0515fbdc023b8c98815a4f72191114ab75799b6
SHA512

24f9125960573e4a99c9407d6e7d543918c921bff1caabd7c394132eaea370c89b242735089af064639b4ccc070a6844b35785ef6be0db9d817ad26b55a1c65a
SSDEEP

49152:Kvjt62XlaSFNWPjljiFa2RoUYIgxDEDwCk/JxJoGdSTHHB72eh2NT:Kvx62XlaSFNWPjljiFXRoUYIgx3v

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

x5sql-62870.portmap.host:62870

Mutex

42098932-ec6f-4d72-ab22-06528c985236

Attributes

encryption_key
3300C61943A333F53FD91D0A93268174467B5322
install_name
ntodsk.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/1224-1-0x00000000004E0000-0x0000000000804000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023cb6-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1128	ntodsk.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\ntodsk.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\ntodsk.exe	Client-built.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1224	Client-built.exe
Token: SeDebugPrivilege	1128	ntodsk.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1128	ntodsk.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1224 wrote to memory of 1128	1224	Client-built.exe	83
PID 1224 wrote to memory of 1128	1224	Client-built.exe	83

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1224
- C:\Windows\system32\SubDir\ntodsk.exe
  "C:\Windows\system32\SubDir\ntodsk.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1128

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\Windows\system32\SubDir\ntodsk.exe

Filesize
3.1MB

MD5
4a0c6269f041778479be25c053014de1

SHA1
7474c9d50ab9e48e165df40cfb5d45873429c1b3

SHA256
f0b341cff383ba4f0143639eb0515fbdc023b8c98815a4f72191114ab75799b6

SHA512
24f9125960573e4a99c9407d6e7d543918c921bff1caabd7c394132eaea370c89b242735089af064639b4ccc070a6844b35785ef6be0db9d817ad26b55a1c65a

Download Submit
memory/1128-8-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/1128-10-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/1128-12-0x000000001BC50000-0x000000001BD02000-memory.dmp

Filesize
712KB

Download
memory/1128-11-0x000000001B360000-0x000000001B3B0000-memory.dmp

Filesize
320KB

Download
memory/1128-13-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/1128-14-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/1224-1-0x00000000004E0000-0x0000000000804000-memory.dmp

Filesize
3.1MB

Download
memory/1224-0-0x00007FFB253C3000-0x00007FFB253C5000-memory.dmp

Filesize
8KB

Download
memory/1224-2-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download
memory/1224-9-0x00007FFB253C0000-0x00007FFB25E81000-memory.dmp

Filesize
10.8MB

Download