quasar | f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb

Analysis

max time kernel
129s
max time network
142s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
14-12-2024 14:11

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General

Target

f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe
Size

288KB
MD5

8a306aec318555fc080f94d5b7a9a2d0
SHA1

94f093f15e0b115bbc9dee803c68c104dcb54524
SHA256

f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb
SHA512

0fe708d879397787eb5c80f0b96d0e18b3264f81950e987d47669a73e49bc5fdf3c8260d6ad1d7f646b6c71d279c63d9b2e9f1fa5e17bc23d8177ef94cbe46d9
SSDEEP

6144:A7zO0LSclT6FOwEP5Kq+SMv0VGb7bDcllbk7n:+lJtTF9zVGkllbkr

Score

10^/10

quasar office discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

45.136.51.217:5173

Mutex

QYKKiqqJ0K2HqPP0Mo

Attributes

encryption_key
rFGYI3uEIwvomle2u8mk
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
behavioral1/memory/2188-1-0x0000000000EA0000-0x0000000000EEE000-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
2	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	f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.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
536	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2188	f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 536	2188	f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe	31
PID 2188 wrote to memory of 536	2188	f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe	31
PID 2188 wrote to memory of 536	2188	f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe	31
PID 2188 wrote to memory of 536	2188	f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe	31

C:\Users\Admin\AppData\Local\Temp\f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe
"C:\Users\Admin\AppData\Local\Temp\f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2188
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "NET framework" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:536

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/2188-0-0x000000007479E000-0x000000007479F000-memory.dmp

Filesize
4KB

Download
memory/2188-1-0x0000000000EA0000-0x0000000000EEE000-memory.dmp

Filesize
312KB

Download
memory/2188-2-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-4-0x000000007479E000-0x000000007479F000-memory.dmp

Filesize
4KB

Download
memory/2188-5-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads