quasar | 718833d88ff6500a6dde11a5b3b1809a61c591823ae214a59d99450abfb006ce

General

Target

Client-built66.exe
Size

1.5MB
MD5

67d95d3eb21ca6d4e309d3e0c7b65595
SHA1

f60d16348059a74b03d368ef3df41a15c2c6cc01
SHA256

718833d88ff6500a6dde11a5b3b1809a61c591823ae214a59d99450abfb006ce
SHA512

004e8fa6499b640be4d6f69ebeb752d6dcaeececc4832a920fe6d2dec3988eee52350cb69b90a6d9fc458a38bb12fa96ff7457a6dbded25266545c3c2428706f
SSDEEP

24576:ffMnwA1Qg+S2HIPbcNE0KKzaOwIRxl2SLuLLusXbQ4q045nLjuodgD:HYrMEwKKzwipyX8WGLj9g

Score

10^/10

quasar spyware trojan

Malware Config

Signatures

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

Quasar payload 4 IoCs

resource	yara_rule
behavioral1/memory/1728-1-0x0000000000D60000-0x0000000000EEC000-memory.dmp	family_quasar
behavioral1/memory/1728-2-0x0000000000280000-0x000000000029A000-memory.dmp	family_quasar
behavioral1/files/0x0008000000017403-7.dat	family_quasar
behavioral1/memory/2704-10-0x00000000000B0000-0x000000000023C000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2704	Clientsided.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir	Client-built66.exe
File opened for modification	C:\Windows\system32\SubDir\Clientsided.exe	Clientsided.exe
File opened for modification	C:\Windows\system32\SubDir	Clientsided.exe
File created	C:\Windows\system32\SubDir\Clientsided.exe	Client-built66.exe
File opened for modification	C:\Windows\system32\SubDir\Clientsided.exe	Client-built66.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

pid	Process
2760	schtasks.exe
2668	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2704	Clientsided.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	Client-built66.exe
Token: SeDebugPrivilege	2704	Clientsided.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2704	Clientsided.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 2760	1728	Client-built66.exe	30
PID 1728 wrote to memory of 2760	1728	Client-built66.exe	30
PID 1728 wrote to memory of 2760	1728	Client-built66.exe	30
PID 1728 wrote to memory of 2704	1728	Client-built66.exe	32
PID 1728 wrote to memory of 2704	1728	Client-built66.exe	32
PID 1728 wrote to memory of 2704	1728	Client-built66.exe	32
PID 2704 wrote to memory of 2668	2704	Clientsided.exe	33
PID 2704 wrote to memory of 2668	2704	Clientsided.exe	33
PID 2704 wrote to memory of 2668	2704	Clientsided.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\Client-built66.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built66.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "hack Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Clientsided.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2760
- C:\Windows\system32\SubDir\Clientsided.exe
  "C:\Windows\system32\SubDir\Clientsided.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "hack Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Clientsided.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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Clientsided.exe

Filesize
1.5MB

MD5
67d95d3eb21ca6d4e309d3e0c7b65595

SHA1
f60d16348059a74b03d368ef3df41a15c2c6cc01

SHA256
718833d88ff6500a6dde11a5b3b1809a61c591823ae214a59d99450abfb006ce

SHA512
004e8fa6499b640be4d6f69ebeb752d6dcaeececc4832a920fe6d2dec3988eee52350cb69b90a6d9fc458a38bb12fa96ff7457a6dbded25266545c3c2428706f

Download Submit
memory/1728-0-0x000007FEF6003000-0x000007FEF6004000-memory.dmp

Filesize
4KB

Download
memory/1728-1-0x0000000000D60000-0x0000000000EEC000-memory.dmp

Filesize
1.5MB

Download
memory/1728-2-0x0000000000280000-0x000000000029A000-memory.dmp

Filesize
104KB

Download
memory/1728-3-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download
memory/1728-9-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download
memory/2704-10-0x00000000000B0000-0x000000000023C000-memory.dmp

Filesize
1.5MB

Download
memory/2704-12-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download
memory/2704-11-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download
memory/2704-13-0x0000000000750000-0x0000000000762000-memory.dmp

Filesize
72KB

Download
memory/2704-14-0x0000000000760000-0x00000000007AE000-memory.dmp

Filesize
312KB

Download
memory/2704-15-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads