quasar | a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c

Analysis

max time kernel
129s
max time network
144s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-04-2024 11:45

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General

Target

QuasarLanTest.exe
Size

3.1MB
MD5

e0537c132607a98cb4133bb066a74db2
SHA1

6a9b6335b9f091e0480fc7167b4d7304677ce08b
SHA256

a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c
SHA512

eb4550090c17c2379455475f91fc637769ab72754fb30f1dd2228a0f18bec86e3eca46cee9f1201cfc3be8314b153633f22cced3cc2467d90d6b3b9d3e7bf65b
SSDEEP

49152:6vxt62XlaSFNWPjljiFa2RoUYIaPRJ6LbR3LoGdATHHB72eh2NT:6v762XlaSFNWPjljiFXRoUYIaPRJ6d

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.10.193:4455

Mutex

71f9480f-0626-42cf-aad4-d6f84c1c5e58

Attributes

encryption_key
C030D8F7F18781EB62BC0CFFC3F2B361D2649603
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
QClient
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2212-0-0x00000000008E0000-0x0000000000C04000-memory.dmp	family_quasar

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

2628 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

QuasarLanTest.exe

description pid process

Token: SeDebugPrivilege 2212 QuasarLanTest.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

QuasarLanTest.exe

pid process

2212 QuasarLanTest.exe

pid	process
2628	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2212	QuasarLanTest.exe

pid	process
2212	QuasarLanTest.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

QuasarLanTest.exe

description	pid	process	target process
PID 2212 wrote to memory of 2628	2212	QuasarLanTest.exe	schtasks.exe
PID 2212 wrote to memory of 2628	2212	QuasarLanTest.exe	schtasks.exe
PID 2212 wrote to memory of 2628	2212	QuasarLanTest.exe	schtasks.exe

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\QuasarLanTest.exe
"C:\Users\Admin\AppData\Local\Temp\QuasarLanTest.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2212

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "QClient" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2628

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2212-0-0x00000000008E0000-0x0000000000C04000-memory.dmp

Filesize
3.1MB

Download
memory/2212-1-0x000007FEF5C50000-0x000007FEF663C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-2-0x0000000002560000-0x00000000025E0000-memory.dmp

Filesize
512KB

Download
memory/2212-3-0x000007FEF5C50000-0x000007FEF663C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-4-0x0000000002560000-0x00000000025E0000-memory.dmp

Filesize
512KB

Download