quasar | fb51d3cb76e8bc633c28d25a45b21ac3c906da0c5cfa2deabfaf37169d1847f3

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25/10/2024, 01:05

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General

Target

999.exe
Size

3.1MB
MD5

983d530245caa91b17923ad5c22d5a05
SHA1

7258015623307e65f8ca13d40bb2885efbe60b37
SHA256

fb51d3cb76e8bc633c28d25a45b21ac3c906da0c5cfa2deabfaf37169d1847f3
SHA512

8f6e4cb59ef7a5c5bfe602e25969811efa894b55446b15dca42ad162628e2cfe48c470f7907bd39350e465b7cf168c60a4d57e023800358d8c917ba07c826b9f
SSDEEP

49152:GvBt62XlaSFNWPjljiFa2RoUYIhfRJ6AbR3LoGd3dTHHB72eh2NT:Gvr62XlaSFNWPjljiFXRoUYIhfRJ6a

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

2.tcp.us-cal-1.ngrok.io:14537

Mutex

b727f93b-76e6-4279-a76d-61b9727ef2c9

Attributes

encryption_key
B3CE4ADBCFC896D87D5632035EB0E3D075AB14F9
install_name
LOGI_INT.exe
log_directory
Logs
reconnect_delay
3000
startup_key
LOGI_INT
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/400-1-0x0000000000300000-0x0000000000624000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c84-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2096	LOGI_INT.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
16	2.tcp.us-cal-1.ngrok.io
63	2.tcp.us-cal-1.ngrok.io
92	2.tcp.us-cal-1.ngrok.io

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir\LOGI_INT.exe	999.exe
File opened for modification	C:\Windows\system32\SubDir	999.exe
File opened for modification	C:\Windows\system32\SubDir\LOGI_INT.exe	LOGI_INT.exe
File opened for modification	C:\Windows\system32\SubDir	LOGI_INT.exe
File created	C:\Windows\system32\SubDir\LOGI_INT.exe	999.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
4780	schtasks.exe
4696	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	400	999.exe
Token: SeDebugPrivilege	2096	LOGI_INT.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2096	LOGI_INT.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 400 wrote to memory of 4780	400	999.exe	87
PID 400 wrote to memory of 4780	400	999.exe	87
PID 400 wrote to memory of 2096	400	999.exe	89
PID 400 wrote to memory of 2096	400	999.exe	89
PID 2096 wrote to memory of 4696	2096	LOGI_INT.exe	90
PID 2096 wrote to memory of 4696	2096	LOGI_INT.exe	90

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\999.exe
"C:\Users\Admin\AppData\Local\Temp\999.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "LOGI_INT" /sc ONLOGON /tr "C:\Windows\system32\SubDir\LOGI_INT.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4780
- C:\Windows\system32\SubDir\LOGI_INT.exe
  "C:\Windows\system32\SubDir\LOGI_INT.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2096
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "LOGI_INT" /sc ONLOGON /tr "C:\Windows\system32\SubDir\LOGI_INT.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4696

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\SubDir\LOGI_INT.exe

Filesize
3.1MB

MD5
983d530245caa91b17923ad5c22d5a05

SHA1
7258015623307e65f8ca13d40bb2885efbe60b37

SHA256
fb51d3cb76e8bc633c28d25a45b21ac3c906da0c5cfa2deabfaf37169d1847f3

SHA512
8f6e4cb59ef7a5c5bfe602e25969811efa894b55446b15dca42ad162628e2cfe48c470f7907bd39350e465b7cf168c60a4d57e023800358d8c917ba07c826b9f

Download Submit
memory/400-0-0x00007FFD554F3000-0x00007FFD554F5000-memory.dmp

Filesize
8KB

Download
memory/400-1-0x0000000000300000-0x0000000000624000-memory.dmp

Filesize
3.1MB

Download
memory/400-2-0x00007FFD554F0000-0x00007FFD55FB1000-memory.dmp

Filesize
10.8MB

Download
memory/400-9-0x00007FFD554F0000-0x00007FFD55FB1000-memory.dmp

Filesize
10.8MB

Download
memory/2096-10-0x00007FFD554F0000-0x00007FFD55FB1000-memory.dmp

Filesize
10.8MB

Download
memory/2096-11-0x00007FFD554F0000-0x00007FFD55FB1000-memory.dmp

Filesize
10.8MB

Download
memory/2096-12-0x000000001BB20000-0x000000001BB70000-memory.dmp

Filesize
320KB

Download
memory/2096-13-0x000000001BC30000-0x000000001BCE2000-memory.dmp

Filesize
712KB

Download
memory/2096-14-0x00007FFD554F0000-0x00007FFD55FB1000-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