quasar | c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2

Analysis

max time kernel
146s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
29/05/2024, 07:46

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General

Target

KR6nDu9fLhop1bFe.exe
Size

3.1MB
MD5

e3d628461d24faf2ad61e1305ed99542
SHA1

aefcdd93114397de51ce8f63e9ef96b65a5b5c11
SHA256

c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2
SHA512

20d47ef82c1dde83325d088c69ff9ae6f968b0a19d652f5ed2f21b1531c86fbf0b49e9df0d524c1333001c7565a8a56039aa31bb82ceba63c41b989dc8fcc991
SSDEEP

49152:xvSlL26AaNeWgPhlmVqvMQ7XSK0bLimzCCoGdITHHB72eh2NT:xvKL26AaNeWgPhlmVqkQ7XSK0bLz

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

31.177.108.29:4782

Mutex

553dcf2c-4c70-4c0c-935a-2e078a46f03e

Attributes

encryption_key
DAFF70D249B4EC619D5A052FDD3418E3549FF268
install_name
KR6nDu9fLhop1bFe.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Defender.Process
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2904-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp	family_quasar
behavioral1/files/0x002b000000014c67-6.dat	family_quasar
behavioral1/memory/2472-9-0x0000000000D70000-0x0000000001094000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2472	KR6nDu9fLhop1bFe.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2948	schtasks.exe
2796	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	KR6nDu9fLhop1bFe.exe
Token: SeDebugPrivilege	2472	KR6nDu9fLhop1bFe.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2472	KR6nDu9fLhop1bFe.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 2948	2904	KR6nDu9fLhop1bFe.exe	28
PID 2904 wrote to memory of 2948	2904	KR6nDu9fLhop1bFe.exe	28
PID 2904 wrote to memory of 2948	2904	KR6nDu9fLhop1bFe.exe	28
PID 2904 wrote to memory of 2472	2904	KR6nDu9fLhop1bFe.exe	30
PID 2904 wrote to memory of 2472	2904	KR6nDu9fLhop1bFe.exe	30
PID 2904 wrote to memory of 2472	2904	KR6nDu9fLhop1bFe.exe	30
PID 2472 wrote to memory of 2796	2472	KR6nDu9fLhop1bFe.exe	31
PID 2472 wrote to memory of 2796	2472	KR6nDu9fLhop1bFe.exe	31
PID 2472 wrote to memory of 2796	2472	KR6nDu9fLhop1bFe.exe	31

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\KR6nDu9fLhop1bFe.exe
"C:\Users\Admin\AppData\Local\Temp\KR6nDu9fLhop1bFe.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Defender.Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2948
- C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2472
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Defender.Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2796

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

C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe

Filesize
3.1MB

MD5
e3d628461d24faf2ad61e1305ed99542

SHA1
aefcdd93114397de51ce8f63e9ef96b65a5b5c11

SHA256
c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2

SHA512
20d47ef82c1dde83325d088c69ff9ae6f968b0a19d652f5ed2f21b1531c86fbf0b49e9df0d524c1333001c7565a8a56039aa31bb82ceba63c41b989dc8fcc991

Download Submit
memory/2472-9-0x0000000000D70000-0x0000000001094000-memory.dmp

Filesize
3.1MB

Download
memory/2472-10-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2472-11-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2472-12-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2472-13-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2904-0-0x000007FEF5573000-0x000007FEF5574000-memory.dmp

Filesize
4KB

Download
memory/2904-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp

Filesize
3.1MB

Download
memory/2904-2-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2904-8-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads