quasar | f0b341cff383ba4f0143639eb0515fbdc023b8c98815a4f72191114ab75799b6

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-12-2024 18:47

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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 3 IoCs

resource	yara_rule
behavioral1/memory/1864-1-0x0000000000A50000-0x0000000000D74000-memory.dmp	family_quasar
behavioral1/files/0x00080000000173a9-5.dat	family_quasar
behavioral1/memory/1868-8-0x0000000000E70000-0x0000000001194000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1868	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	1864	Client-built.exe
Token: SeDebugPrivilege	1868	ntodsk.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1868	ntodsk.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 1868	1864	Client-built.exe	30
PID 1864 wrote to memory of 1868	1864	Client-built.exe	30
PID 1864 wrote to memory of 1868	1864	Client-built.exe	30

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:1864
- 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:1868

Network

MITRE ATT&CK Matrix

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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/1864-0-0x000007FEF53E3000-0x000007FEF53E4000-memory.dmp

Filesize
4KB

Download
memory/1864-1-0x0000000000A50000-0x0000000000D74000-memory.dmp

Filesize
3.1MB

Download
memory/1864-2-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/1864-10-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/1868-7-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/1868-8-0x0000000000E70000-0x0000000001194000-memory.dmp

Filesize
3.1MB

Download
memory/1868-9-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download
memory/1868-11-0x000007FEF53E0000-0x000007FEF5DCC000-memory.dmp

Filesize
9.9MB

Download