quasar | df11dd094952f12ea053085c7a7801326a58dc2ce42570b35b2fec98a7801808

Analysis

max time kernel
39s
max time network
18s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28-03-2024 20:52

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General

Target

Client-built.exe
Size

3.1MB
MD5

5b2ccc8a8d94dde2f51b8311e2548255
SHA1

22edf1e9abd6902e1c9b424a548b6d52df20ae22
SHA256

df11dd094952f12ea053085c7a7801326a58dc2ce42570b35b2fec98a7801808
SHA512

78c8c5d54be2926744351846723903da6e51d517b70f1aac7312a6f29ce64663eb39db905a343a5ddef235c26d093c3e97bbd21abc27ebdf1bc4de257bb4a861
SSDEEP

49152:DvRuf2NUaNmwzPWlvdaKM7ZxTwUsEdGWBeLLoBdLTHHB72eh2NT:Dvsf2NUaNmwzPWlvdaB7ZxTwUlGl

Score

10^/10

quasar slave spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Slave

140.238.91.110:38899

uk2.localto.net:38899:38899

Mutex

276d9dc6-b19c-4958-8ac3-89586bd3b515

Attributes

encryption_key
ABCF70C37D1A79A01712038122D1532DF20DF72A
install_name
Client.exe
log_directory
Error Logs
reconnect_delay
3000
startup_key
WOS64
subdirectory
Windows

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1940-0-0x0000000000F30000-0x0000000001254000-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

2784 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Client-built.exe

description pid process

Token: SeDebugPrivilege 1940 Client-built.exe

pid	process
2784	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1940	Client-built.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Client-built.exe

description	pid	process	target process
PID 1940 wrote to memory of 2784	1940	Client-built.exe	schtasks.exe
PID 1940 wrote to memory of 2784	1940	Client-built.exe	schtasks.exe
PID 1940 wrote to memory of 2784	1940	Client-built.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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1940

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "WOS64" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2784

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/1940-0-0x0000000000F30000-0x0000000001254000-memory.dmp

Filesize
3.1MB

Download
memory/1940-1-0x000007FEF5440000-0x000007FEF5E2C000-memory.dmp

Filesize
9.9MB

Download
memory/1940-2-0x000000001B190000-0x000000001B210000-memory.dmp

Filesize
512KB

Download
memory/1940-4-0x000007FEF5440000-0x000007FEF5E2C000-memory.dmp

Filesize
9.9MB

Download
memory/1940-5-0x000000001B190000-0x000000001B210000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads