quasar | b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583

Analysis

max time kernel
150s
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
01-12-2024 12:34

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General

Target

b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe
Size

288KB
MD5

26e2495c2fa61cf0dadf028726236ad4
SHA1

de0da2ea7ce65724faedd3f8239c8559000a293f
SHA256

b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583
SHA512

7e66a4eb948a0f4be858d694a62a215cfe2b3215d6506d816cb8e09895731dd3f80222e030922f73a48b4d86525a4d7b680d40c7023886af3940b9eec07aa0fa
SSDEEP

6144:h7zO0LSclT6FOwEP5Kq+SMv0VGb7bDcllbkHn:xlJtTF9zVGkllbkH

Score

10^/10

quasar office discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

45.136.51.217:2222

Mutex

d1mBeqcqGummV1rEKw

Attributes

encryption_key
h9j7M9986eVjQwMbjacZ
install_name
csrss.exe
log_directory
Logs
reconnect_delay
3000
startup_key
NET framework
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/4440-1-0x0000000000360000-0x00000000003AE000-memory.dmp	family_quasar

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
6	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
812	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4440	b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4440	b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 812	4440	b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe	83
PID 4440 wrote to memory of 812	4440	b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe	83
PID 4440 wrote to memory of 812	4440	b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe	83

C:\Users\Admin\AppData\Local\Temp\b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe
"C:\Users\Admin\AppData\Local\Temp\b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4440
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "NET framework" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:812

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4440-0-0x000000007510E000-0x000000007510F000-memory.dmp

Filesize
4KB

Download
memory/4440-1-0x0000000000360000-0x00000000003AE000-memory.dmp

Filesize
312KB

Download
memory/4440-2-0x00000000051F0000-0x0000000005794000-memory.dmp

Filesize
5.6MB

Download
memory/4440-3-0x0000000004D80000-0x0000000004E12000-memory.dmp

Filesize
584KB

Download
memory/4440-4-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/4440-5-0x0000000004CE0000-0x0000000004D46000-memory.dmp

Filesize
408KB

Download
memory/4440-6-0x00000000059A0000-0x00000000059B2000-memory.dmp

Filesize
72KB

Download
memory/4440-7-0x0000000005EE0000-0x0000000005F1C000-memory.dmp

Filesize
240KB

Download
memory/4440-9-0x0000000006240000-0x000000000624A000-memory.dmp

Filesize
40KB

Download
memory/4440-10-0x000000007510E000-0x000000007510F000-memory.dmp

Filesize
4KB

Download
memory/4440-11-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads