quasar | 2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545e

General

Target

2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe
Size

3.1MB
MD5

716de8beb61250536658ba383696c8c0
SHA1

be5fb7369a47df7b32739a8841d4a5169801f269
SHA256

2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545e
SHA512

200b5b2d58ff1189e81e769b893edd2fa91218f89828dbe6da7b489a948864b2f567ebd72bd4f4d2c4894411f26da567b354059173b089e55973b9e68971836e
SSDEEP

49152:Dv/lL26AaNeWgPhlmVqvMQ7XSKUCb1JncoGdgTHHB72eh2NT:DvNL26AaNeWgPhlmVqkQ7XSKUCI

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

Baaptyst-25027.portmap.host:25027

Mutex

0ef8ad75-eaeb-42b1-9495-e9a64cdb45c6

Attributes

encryption_key
76C62DF6E7B70F1A27E24720FDF3E4F2ED196228
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/716-1-0x0000000000810000-0x0000000000B34000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

4596 Client.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

3736 schtasks.exe
3108 schtasks.exe

pid	process
4596	Client.exe

pid	process
3736	schtasks.exe
3108	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exeClient.exe

description	pid	process
Token: SeDebugPrivilege	716	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe
Token: SeDebugPrivilege	4596	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

4596 Client.exe

pid	process
4596	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exeClient.exe

description	pid	process	target process
PID 716 wrote to memory of 3736	716	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	schtasks.exe
PID 716 wrote to memory of 3736	716	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	schtasks.exe
PID 716 wrote to memory of 4596	716	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	Client.exe
PID 716 wrote to memory of 4596	716	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	Client.exe
PID 4596 wrote to memory of 3108	4596	Client.exe	schtasks.exe
PID 4596 wrote to memory of 3108	4596	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\2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe
"C:\Users\Admin\AppData\Local\Temp\2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:716
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3736
- 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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4596
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3108

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

Filesize
3.1MB

MD5
716de8beb61250536658ba383696c8c0

SHA1
be5fb7369a47df7b32739a8841d4a5169801f269

SHA256
2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545e

SHA512
200b5b2d58ff1189e81e769b893edd2fa91218f89828dbe6da7b489a948864b2f567ebd72bd4f4d2c4894411f26da567b354059173b089e55973b9e68971836e

Download Submit
memory/716-0-0x00007FFC5D9F3000-0x00007FFC5D9F5000-memory.dmp

Filesize
8KB

Download
memory/716-1-0x0000000000810000-0x0000000000B34000-memory.dmp

Filesize
3.1MB

Download
memory/716-2-0x00007FFC5D9F0000-0x00007FFC5E4B1000-memory.dmp

Filesize
10.8MB

Download
memory/716-9-0x00007FFC5D9F0000-0x00007FFC5E4B1000-memory.dmp

Filesize
10.8MB

Download
memory/4596-10-0x00007FFC5D9F0000-0x00007FFC5E4B1000-memory.dmp

Filesize
10.8MB

Download
memory/4596-11-0x00007FFC5D9F0000-0x00007FFC5E4B1000-memory.dmp

Filesize
10.8MB

Download
memory/4596-12-0x000000001C080000-0x000000001C0D0000-memory.dmp

Filesize
320KB

Download
memory/4596-13-0x000000001C7A0000-0x000000001C852000-memory.dmp

Filesize
712KB

Download
memory/4596-14-0x00007FFC5D9F0000-0x00007FFC5E4B1000-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