quasar | 13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aa

General

Target

13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe
Size

3.1MB
MD5

cf19123181beb16f3be5cc855592f420
SHA1

b006731480857f5a0fdc18a6046a143258706b85
SHA256

13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aa
SHA512

87fd9f475741fbabaf13f5047e305994a3a673f7d6e381edb0002af11b67ac5fbc7b146b60ec9816470589e1dcaefe0003129614475e149432940c97b36e7d7b
SSDEEP

49152:SvPlL26AaNeWgPhlmVqvMQ7XSKXExNESEWk/i5LoGdhTHHB72eh2NT:SvdL26AaNeWgPhlmVqkQ7XSKUxVJ

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.43.100:8888

192.168.43.100:4444

Mutex

99559ed1-51e2-4523-8e07-e3b36ebf2083

Attributes

encryption_key
464067E99FD8E5E67E93A2CB031CD49F3927F634
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup2
subdirectory
ComApp

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2600-1-0x0000000000180000-0x00000000004A4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\ComApp\Client.exe	family_quasar
behavioral1/memory/2244-10-0x0000000000970000-0x0000000000C94000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2244 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

Processes:

schtasks.exeschtasks.exe

pid process

2488 schtasks.exe
2088 schtasks.exe

pid	process
2244	Client.exe

pid	process
2488	schtasks.exe
2088	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exeClient.exe

description	pid	process
Token: SeDebugPrivilege	2600	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe
Token: SeDebugPrivilege	2244	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

2244 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

2244 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

2244 Client.exe

pid	process
2244	Client.exe

pid	process
2244	Client.exe

pid	process
2244	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exeClient.exe

description	pid	process	target process
PID 2600 wrote to memory of 2488	2600	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	schtasks.exe
PID 2600 wrote to memory of 2488	2600	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	schtasks.exe
PID 2600 wrote to memory of 2488	2600	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	schtasks.exe
PID 2600 wrote to memory of 2244	2600	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	Client.exe
PID 2600 wrote to memory of 2244	2600	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	Client.exe
PID 2600 wrote to memory of 2244	2600	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	Client.exe
PID 2244 wrote to memory of 2088	2244	Client.exe	schtasks.exe
PID 2244 wrote to memory of 2088	2244	Client.exe	schtasks.exe
PID 2244 wrote to memory of 2088	2244	Client.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\13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe
"C:\Users\Admin\AppData\Local\Temp\13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2600
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup2" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\ComApp\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2488
- C:\Users\Admin\AppData\Roaming\ComApp\Client.exe
  "C:\Users\Admin\AppData\Roaming\ComApp\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:2244
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup2" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\ComApp\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2088

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\ComApp\Client.exe

Filesize
3.1MB

MD5
cf19123181beb16f3be5cc855592f420

SHA1
b006731480857f5a0fdc18a6046a143258706b85

SHA256
13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aa

SHA512
87fd9f475741fbabaf13f5047e305994a3a673f7d6e381edb0002af11b67ac5fbc7b146b60ec9816470589e1dcaefe0003129614475e149432940c97b36e7d7b

Download Submit
memory/2244-10-0x0000000000970000-0x0000000000C94000-memory.dmp

Filesize
3.1MB

Download
memory/2244-11-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-9-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2244-12-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2600-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/2600-1-0x0000000000180000-0x00000000004A4000-memory.dmp

Filesize
3.1MB

Download
memory/2600-2-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/2600-8-0x000007FEF5D10000-0x000007FEF66FC000-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