quasar | a725bb8800499239e18eb3973b4c4371214e8da4efb12108ac42957a3819572b

Analysis

max time kernel
129s
max time network
143s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30-12-2023 12:51

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General

Target

1914a2c8d1589d346dec86208bbbee37.exe
Size

502KB
MD5

1914a2c8d1589d346dec86208bbbee37
SHA1

c9f854cb866fc0dfa54ad4438fb1e3479a9a384e
SHA256

a725bb8800499239e18eb3973b4c4371214e8da4efb12108ac42957a3819572b
SHA512

fb7c411b9aa69deb8ac2660846a555e3bc2481dea13b858f1aa214a67160f02eb205dd08e84c6867c06deddca00ca562c938e2f667e05faac67adfcd9385799c
SSDEEP

6144:RTEgdc0Y3XAGbgiIN2RSBytYsf4q2gRslboscE6Ob8F9SAO+uKaE6lcTR3S:RTEgdfYvbgeeAb5sqpAx+uKadlcdS

Score

10^/10

quasar test1 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

test1

166.62.33.218:6624

Mutex

b2e23ea3-acf2-4226-ae2a-ae57e85e6e82

Attributes

encryption_key
C8BFD012DB4B42D492F03E53D34F6E70BFC0E813
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2624-0-0x00000000000F0000-0x0000000000174000-memory.dmp	family_quasar
behavioral1/memory/2624-2-0x000000001AD30000-0x000000001ADB0000-memory.dmp	family_quasar

Drops file in Program Files directory 2 IoCs

Processes:

1914a2c8d1589d346dec86208bbbee37.exe

description	ioc	process
File created	C:\Program Files\SubDir\Client.exe	1914a2c8d1589d346dec86208bbbee37.exe
File opened for modification	C:\Program Files\SubDir\Client.exe	1914a2c8d1589d346dec86208bbbee37.exe

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

2916 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

1914a2c8d1589d346dec86208bbbee37.exe

description pid process

Token: SeDebugPrivilege 2624 1914a2c8d1589d346dec86208bbbee37.exe

pid	process
2916	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2624	1914a2c8d1589d346dec86208bbbee37.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

1914a2c8d1589d346dec86208bbbee37.exe

description	pid	process	target process
PID 2624 wrote to memory of 2916	2624	1914a2c8d1589d346dec86208bbbee37.exe	schtasks.exe
PID 2624 wrote to memory of 2916	2624	1914a2c8d1589d346dec86208bbbee37.exe	schtasks.exe
PID 2624 wrote to memory of 2916	2624	1914a2c8d1589d346dec86208bbbee37.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\1914a2c8d1589d346dec86208bbbee37.exe
"C:\Users\Admin\AppData\Local\Temp\1914a2c8d1589d346dec86208bbbee37.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2624

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\1914a2c8d1589d346dec86208bbbee37.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2916

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

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Downloads

memory/2624-0-0x00000000000F0000-0x0000000000174000-memory.dmp

Filesize
528KB

Download
memory/2624-1-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

Filesize
9.9MB

Download
memory/2624-2-0x000000001AD30000-0x000000001ADB0000-memory.dmp

Filesize
512KB

Download
memory/2624-4-0x000007FEF5220000-0x000007FEF5C0C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads