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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2216-1-0x0000000000E90000-0x00000000011B4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\ComApp\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

1600 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

5084 schtasks.exe
4720 schtasks.exe

pid	process
1600	Client.exe

pid	process
5084	schtasks.exe
4720	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exeClient.exe

description	pid	process
Token: SeDebugPrivilege	2216	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe
Token: SeDebugPrivilege	1600	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

1600 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

1600 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

1600 Client.exe

pid	process
1600	Client.exe

pid	process
1600	Client.exe

pid	process
1600	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exeClient.exe

description	pid	process	target process
PID 2216 wrote to memory of 5084	2216	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	schtasks.exe
PID 2216 wrote to memory of 5084	2216	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	schtasks.exe
PID 2216 wrote to memory of 1600	2216	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	Client.exe
PID 2216 wrote to memory of 1600	2216	13ab82eaa0b66f49e8e06f537579a2eae9bb9d547e128ddf8741b74ad7c138aaN.exe	Client.exe
PID 1600 wrote to memory of 4720	1600	Client.exe	schtasks.exe
PID 1600 wrote to memory of 4720	1600	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:2216
- 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:5084
- 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:1600
- - 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:4720

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/1600-10-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/1600-11-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/1600-12-0x000000001C350000-0x000000001C3A0000-memory.dmp

Filesize
320KB

Download
memory/1600-13-0x000000001C460000-0x000000001C512000-memory.dmp

Filesize
712KB

Download
memory/1600-14-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/2216-0-0x00007FFCD4323000-0x00007FFCD4325000-memory.dmp

Filesize
8KB

Download
memory/2216-1-0x0000000000E90000-0x00000000011B4000-memory.dmp

Filesize
3.1MB

Download
memory/2216-2-0x00007FFCD4320000-0x00007FFCD4DE1000-memory.dmp

Filesize
10.8MB

Download
memory/2216-9-0x00007FFCD4320000-0x00007FFCD4DE1000-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