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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2800-1-0x0000000000150000-0x0000000000474000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral1/memory/2868-9-0x0000000000A60000-0x0000000000D84000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2868 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

2736 schtasks.exe
2196 schtasks.exe

pid	process
2868	Client.exe

pid	process
2736	schtasks.exe
2196	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exeClient.exe

description	pid	process
Token: SeDebugPrivilege	2800	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe
Token: SeDebugPrivilege	2868	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

2868 Client.exe

pid	process
2868	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exeClient.exe

description	pid	process	target process
PID 2800 wrote to memory of 2736	2800	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	schtasks.exe
PID 2800 wrote to memory of 2736	2800	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	schtasks.exe
PID 2800 wrote to memory of 2736	2800	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	schtasks.exe
PID 2800 wrote to memory of 2868	2800	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	Client.exe
PID 2800 wrote to memory of 2868	2800	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	Client.exe
PID 2800 wrote to memory of 2868	2800	2c4425cf5f466036fef37caadc391b0726c074078970aa5dc655c2b152bc545eN.exe	Client.exe
PID 2868 wrote to memory of 2196	2868	Client.exe	schtasks.exe
PID 2868 wrote to memory of 2196	2868	Client.exe	schtasks.exe
PID 2868 wrote to memory of 2196	2868	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:2800
- 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:2736
- 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:2868
- - 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:2196

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/2800-0-0x000007FEF5883000-0x000007FEF5884000-memory.dmp

Filesize
4KB

Download
memory/2800-1-0x0000000000150000-0x0000000000474000-memory.dmp

Filesize
3.1MB

Download
memory/2800-2-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2800-10-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2868-8-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2868-9-0x0000000000A60000-0x0000000000D84000-memory.dmp

Filesize
3.1MB

Download
memory/2868-11-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/2868-12-0x000007FEF5880000-0x000007FEF626C000-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