quasar | 250ed85363ae1d6dd070a462f1ac25a8a74c5e1380359d85eb082b0eaf4bb8b1

General

Target

rab.exe
Size

3.1MB
MD5

20290ac43ac1bed38b4ba6a9c8a0563c
SHA1

8ba324cb8ef2fd31ff6e5d7395ed33178141a28e
SHA256

250ed85363ae1d6dd070a462f1ac25a8a74c5e1380359d85eb082b0eaf4bb8b1
SHA512

ef2f449cbbbb9e5cf9ae3af3406c80af4422cb0b65d690d28807da02e8ad7416831f80ce63365ce12ee730c31c4ce18d787673838cf3c3c3d102de11aa53111e
SSDEEP

49152:qvflL26AaNeWgPhlmVqvMQ7XSKYnQaEfeIk/l4DoGdpTHHB72eh2NT:qvtL26AaNeWgPhlmVqkQ7XSKYnQIw

Score

10^/10

quasar megahack_v1488 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

MegaHack_v1488

C2

rab1.premium-televizor.net:18651

Mutex

af92703d-a16f-40c6-8fff-b3793fd59f85

Attributes

encryption_key
0F1B05653C3B3AB3BB4ECD772DD024668CBE8DF1
install_name
system32.exe
log_directory
Keyboard
reconnect_delay
3000
startup_key
Trusted Installer
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5100-1-0x0000000000250000-0x0000000000574000-memory.dmp	family_quasar
C:\Windows\system32\SubDir\system32.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

system32.exe

pid process

5068 system32.exe

pid	process
5068	system32.exe

Drops file in System32 directory 5 IoCs

Processes:

rab.exesystem32.exe

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

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exe

pid process

3520 schtasks.exe
3892 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

rab.exesystem32.exe

description pid process

Token: SeDebugPrivilege 5100 rab.exe
Token: SeDebugPrivilege 5068 system32.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

system32.exe

pid process

5068 system32.exe

pid	process
3520	schtasks.exe
3892	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	5100	rab.exe
Token: SeDebugPrivilege	5068	system32.exe

pid	process
5068	system32.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rab.exesystem32.exe

description	pid	process	target process
PID 5100 wrote to memory of 3520	5100	rab.exe	schtasks.exe
PID 5100 wrote to memory of 3520	5100	rab.exe	schtasks.exe
PID 5100 wrote to memory of 5068	5100	rab.exe	system32.exe
PID 5100 wrote to memory of 5068	5100	rab.exe	system32.exe
PID 5068 wrote to memory of 3892	5068	system32.exe	schtasks.exe
PID 5068 wrote to memory of 3892	5068	system32.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\rab.exe
"C:\Users\Admin\AppData\Local\Temp\rab.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Trusted Installer" /sc ONLOGON /tr "C:\Windows\system32\SubDir\system32.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3520
- C:\Windows\system32\SubDir\system32.exe
  "C:\Windows\system32\SubDir\system32.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5068
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Trusted Installer" /sc ONLOGON /tr "C:\Windows\system32\SubDir\system32.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\system32\SubDir\system32.exe

Filesize
3.1MB

MD5
20290ac43ac1bed38b4ba6a9c8a0563c

SHA1
8ba324cb8ef2fd31ff6e5d7395ed33178141a28e

SHA256
250ed85363ae1d6dd070a462f1ac25a8a74c5e1380359d85eb082b0eaf4bb8b1

SHA512
ef2f449cbbbb9e5cf9ae3af3406c80af4422cb0b65d690d28807da02e8ad7416831f80ce63365ce12ee730c31c4ce18d787673838cf3c3c3d102de11aa53111e

Download Submit
memory/5068-10-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download
memory/5068-11-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download
memory/5068-12-0x0000000003120000-0x0000000003170000-memory.dmp

Filesize
320KB

Download
memory/5068-13-0x000000001C4F0000-0x000000001C5A2000-memory.dmp

Filesize
712KB

Download
memory/5068-14-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download
memory/5068-15-0x0000000003170000-0x0000000003182000-memory.dmp

Filesize
72KB

Download
memory/5068-16-0x000000001BBC0000-0x000000001BBFC000-memory.dmp

Filesize
240KB

Download
memory/5100-0-0x00007FFD9D8C3000-0x00007FFD9D8C5000-memory.dmp

Filesize
8KB

Download
memory/5100-1-0x0000000000250000-0x0000000000574000-memory.dmp

Filesize
3.1MB

Download
memory/5100-2-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download
memory/5100-9-0x00007FFD9D8C0000-0x00007FFD9E381000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads