quasar | e9a6cd9f0b02d2718b18c784014ffe3ece170196ade1bfed7ecad721349784e8

Analysis

max time kernel
141s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
11-10-2023 10:21

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General

Target

84196815c135e19db65295a1cea9a522.exe
Size

3.1MB
MD5

84196815c135e19db65295a1cea9a522
SHA1

fc46f3972ad6280b17e27f3ff519c2b7d035370f
SHA256

e9a6cd9f0b02d2718b18c784014ffe3ece170196ade1bfed7ecad721349784e8
SHA512

3be5c58de337af4f9da7206316f29ab42ba6e43129bac71580f055ce37a84995d137f3e921caa535330a8b90941a574b1d23d57996373a74376426b0d07c3070
SSDEEP

49152:7vWhBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkaYiRJ6TbR3LoGdjTHHB72eh2NT:7v4t2d5aKCuVPzlEmVQ0wvwfYiRJ6F

Score

10^/10

quasar slave spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

slave

cherrywoods-29890.portmap.host:29890:16243

Mutex

5d49d039-8bce-40c5-82b6-413e6ca1279a

Attributes

encryption_key
2E34CBDFC0A612A970A99A781D3AB0C010E1A59C
install_name
cvvhost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Security notification icon
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2824-0-0x00000000009E0000-0x0000000000D04000-memory.dmp	family_quasar

Drops file in System32 directory 2 IoCs

Processes:

84196815c135e19db65295a1cea9a522.exe

description	ioc	process
File created	C:\Windows\system32\SubDir\cvvhost.exe	84196815c135e19db65295a1cea9a522.exe
File opened for modification	C:\Windows\system32\SubDir\cvvhost.exe	84196815c135e19db65295a1cea9a522.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

2508 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

84196815c135e19db65295a1cea9a522.exe

description pid process

Token: SeDebugPrivilege 2824 84196815c135e19db65295a1cea9a522.exe

pid	process
2508	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2824	84196815c135e19db65295a1cea9a522.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

84196815c135e19db65295a1cea9a522.exe

description	pid	process	target process
PID 2824 wrote to memory of 2508	2824	84196815c135e19db65295a1cea9a522.exe	schtasks.exe
PID 2824 wrote to memory of 2508	2824	84196815c135e19db65295a1cea9a522.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\84196815c135e19db65295a1cea9a522.exe
"C:\Users\Admin\AppData\Local\Temp\84196815c135e19db65295a1cea9a522.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2824

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Windows Security notification icon" /sc ONLOGON /tr "C:\Windows\system32\SubDir\cvvhost.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

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Downloads

memory/2824-0-0x00000000009E0000-0x0000000000D04000-memory.dmp

Filesize
3.1MB

Download
memory/2824-1-0x00007FFB3F5F0000-0x00007FFB400B1000-memory.dmp

Filesize
10.8MB

Download
memory/2824-2-0x000000001BAF0000-0x000000001BB00000-memory.dmp

Filesize
64KB

Download
memory/2824-3-0x00007FFB3F5F0000-0x00007FFB400B1000-memory.dmp

Filesize
10.8MB

Download
memory/2824-4-0x000000001BAF0000-0x000000001BB00000-memory.dmp

Filesize
64KB

Download