quasar | 1dff2a45e9861cdcb8741dd196123e32e2b9004b950ee21b9bacc9f99be14fdc

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
27-12-2024 05:50

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General

Target

msgde.exe
Size

3.1MB
MD5

c9536d9bb5c51fe2741cbf206531c13b
SHA1

5e4e1d68dd06301cf7810fa04589917aadfefad7
SHA256

1dff2a45e9861cdcb8741dd196123e32e2b9004b950ee21b9bacc9f99be14fdc
SHA512

e3bd730edd61ef54180ca004947cdcd1de88756ecec7f7f46f0a66702e5f271243ff096b0dc3c1e93621948745374fe996704078a64d23a7d049f424e754f5f7
SSDEEP

49152:avBt62XlaSFNWPjljiFa2RoUYI63RJ6TbR3LoGd/THHB72eh2NT:avr62XlaSFNWPjljiFXRoUYI63RJ6F

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

185.228.82.21:4782

Mutex

59c47ccd-e59a-4ccb-933e-f1094e43684c

Attributes

encryption_key
7CDE15C94B12183E5BC0673A57C6342C87E44E2A
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
msgde
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/1200-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b68-8.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1152	Client.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client.exe
File opened for modification	C:\Windows\system32\SubDir	Client.exe
File created	C:\Windows\system32\SubDir\Client.exe	msgde.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	msgde.exe
File opened for modification	C:\Windows\system32\SubDir	msgde.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
4376	schtasks.exe
556	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1200	msgde.exe
Token: SeDebugPrivilege	1152	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1152	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 4376	1200	msgde.exe	84
PID 1200 wrote to memory of 4376	1200	msgde.exe	84
PID 1200 wrote to memory of 1152	1200	msgde.exe	86
PID 1200 wrote to memory of 1152	1200	msgde.exe	86
PID 1152 wrote to memory of 556	1152	Client.exe	87
PID 1152 wrote to memory of 556	1152	Client.exe	87

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\msgde.exe
"C:\Users\Admin\AppData\Local\Temp\msgde.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "msgde" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4376
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1152
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "msgde" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:556

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

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Downloads

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

Filesize
3.1MB

MD5
c9536d9bb5c51fe2741cbf206531c13b

SHA1
5e4e1d68dd06301cf7810fa04589917aadfefad7

SHA256
1dff2a45e9861cdcb8741dd196123e32e2b9004b950ee21b9bacc9f99be14fdc

SHA512
e3bd730edd61ef54180ca004947cdcd1de88756ecec7f7f46f0a66702e5f271243ff096b0dc3c1e93621948745374fe996704078a64d23a7d049f424e754f5f7

Download Submit
memory/1152-10-0x00007FFBB9E70000-0x00007FFBBA931000-memory.dmp

Filesize
10.8MB

Download
memory/1152-11-0x00007FFBB9E70000-0x00007FFBBA931000-memory.dmp

Filesize
10.8MB

Download
memory/1152-13-0x000000001D820000-0x000000001D8D2000-memory.dmp

Filesize
712KB

Download
memory/1152-12-0x000000001D710000-0x000000001D760000-memory.dmp

Filesize
320KB

Download
memory/1152-16-0x000000001D790000-0x000000001D7A2000-memory.dmp

Filesize
72KB

Download
memory/1152-17-0x000000001E020000-0x000000001E05C000-memory.dmp

Filesize
240KB

Download
memory/1152-18-0x00007FFBB9E70000-0x00007FFBBA931000-memory.dmp

Filesize
10.8MB

Download
memory/1200-0-0x00007FFBB9E73000-0x00007FFBB9E75000-memory.dmp

Filesize
8KB

Download
memory/1200-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp

Filesize
3.1MB

Download
memory/1200-2-0x00007FFBB9E70000-0x00007FFBBA931000-memory.dmp

Filesize
10.8MB

Download
memory/1200-9-0x00007FFBB9E70000-0x00007FFBBA931000-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