quasar | bfb28a852b12a795fb4d21fbe2b2f4c56e9742cbeace1cf9564b97bda1d08e55

General

Target

Bootstrapper.exe
Size

3.1MB
MD5

972d7bcd3eb4daaa0ef69215d91e41d9
SHA1

d3bcc25f8585405642a113ae6bae503648a765a2
SHA256

bfb28a852b12a795fb4d21fbe2b2f4c56e9742cbeace1cf9564b97bda1d08e55
SHA512

17433b55a5f0f61b0db42e22f975c4fa96298bc79a7a15b34d5342057bbf97a5229b23a7a12cc4a02afb48e485a2ae4ff05892b132ef19d145f2997814885cf0
SSDEEP

49152:bvblL26AaNeWgPhlmVqvMQ7XSKjBOEEqk7k/8FFoGdRnggTHHB72eh2NT:bvBL26AaNeWgPhlmVqkQ7XSKjBOjT

Score

10^/10

quasar rat client spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

rat client

C2

AMNSALKSamongus-47679.portmap.host:4782

Mutex

d3bc3858-ff4a-4aa8-97ec-67721ddcdeeb

Attributes

encryption_key
C8D618C9B5D2F91FFC94B6E9C868ECF80EB774F8
install_name
Client.exe
log_directory
ratted client
reconnect_delay
3000
startup_key
RedTiger Tool v6.1
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/3048-1-0x0000000001250000-0x0000000001574000-memory.dmp	family_quasar
behavioral1/files/0x0033000000016dd9-5.dat	family_quasar
behavioral1/memory/2704-9-0x0000000000C90000-0x0000000000FB4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2704	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

pid	Process
2748	schtasks.exe
2668	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3048	Bootstrapper.exe
Token: SeDebugPrivilege	2704	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2704	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2704	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2704	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 2748	3048	Bootstrapper.exe	30
PID 3048 wrote to memory of 2748	3048	Bootstrapper.exe	30
PID 3048 wrote to memory of 2748	3048	Bootstrapper.exe	30
PID 3048 wrote to memory of 2704	3048	Bootstrapper.exe	32
PID 3048 wrote to memory of 2704	3048	Bootstrapper.exe	32
PID 3048 wrote to memory of 2704	3048	Bootstrapper.exe	32
PID 2704 wrote to memory of 2668	2704	Client.exe	33
PID 2704 wrote to memory of 2668	2704	Client.exe	33
PID 2704 wrote to memory of 2668	2704	Client.exe	33

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\Bootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3048
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "RedTiger Tool v6.1" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2748
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "RedTiger Tool v6.1" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2668

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
972d7bcd3eb4daaa0ef69215d91e41d9

SHA1
d3bcc25f8585405642a113ae6bae503648a765a2

SHA256
bfb28a852b12a795fb4d21fbe2b2f4c56e9742cbeace1cf9564b97bda1d08e55

SHA512
17433b55a5f0f61b0db42e22f975c4fa96298bc79a7a15b34d5342057bbf97a5229b23a7a12cc4a02afb48e485a2ae4ff05892b132ef19d145f2997814885cf0

Download Submit
memory/2704-8-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/2704-9-0x0000000000C90000-0x0000000000FB4000-memory.dmp

Filesize
3.1MB

Download
memory/2704-10-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/2704-11-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/3048-0-0x000007FEF5433000-0x000007FEF5434000-memory.dmp

Filesize
4KB

Download
memory/3048-1-0x0000000001250000-0x0000000001574000-memory.dmp

Filesize
3.1MB

Download
memory/3048-2-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/3048-7-0x000007FEF5430000-0x000007FEF5E1C000-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