quasar | 3b91d7f0be55606bcdf71b37a18f34c298156b12181ff7c944fb7a1818916736

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07/10/2024, 04:52

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General

Target

Client-built.exe
Size

348KB
MD5

fa9b24d2daf3f8cf5e8fb84a4b0cd197
SHA1

03cfb24c35b7f79fd1ce716dd2402ca56d09a349
SHA256

f429a38b014770d38d3c95aca9e5169c6d2aee6731ae6dacf2b8d2911bdb0827
SHA512

987beefe76c56a58ff279ca08b5f702cdf5bfed3d64c47ef8c041b4a10f5dd9b475f1cbc856b3a0ae55c310bde67b672a70a11d5b961608910d7b22d2d5bc5b6
SSDEEP

6144:gN6bPXhLApfp04t/+qckvubgvbIRw/9fVng:0mhApTt/+ctvbiw/9flg

Score

10^/10

quasar new discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

new

caidume1368.ddns.net:8848

Mutex

QSR_MUTEX_7rJKh7823LOXhq62Ll

Attributes

encryption_key
XOrsMOPj48itZ7EYR3g9
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
System
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral5/memory/1564-1-0x0000000000230000-0x000000000028E000-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	Client-built.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
2640	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1564	Client-built.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1564 wrote to memory of 2640	1564	Client-built.exe	30
PID 1564 wrote to memory of 2640	1564	Client-built.exe	30
PID 1564 wrote to memory of 2640	1564	Client-built.exe	30
PID 1564 wrote to memory of 2640	1564	Client-built.exe	30

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1564
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2640

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/1564-0-0x000000007443E000-0x000000007443F000-memory.dmp

Filesize
4KB

Download
memory/1564-1-0x0000000000230000-0x000000000028E000-memory.dmp

Filesize
376KB

Download
memory/1564-2-0x0000000074430000-0x0000000074B1E000-memory.dmp

Filesize
6.9MB

Download
memory/1564-3-0x000000007443E000-0x000000007443F000-memory.dmp

Filesize
4KB

Download
memory/1564-4-0x0000000074430000-0x0000000074B1E000-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