quasar | 1a29354507cb61802e75cc6b6c31b0a1ef9954fdd74a7e589c2ebcc1ded13e00

Analysis

max time kernel
150s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20230621-en
resource tags

arch:x64arch:x86image:win10v2004-20230621-enlocale:en-usos:windows10-2004-x64system
submitted
30/06/2023, 01:55

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General

Target
480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe
Size 11.3MB
Sample230630-cch2bafg92
SHA256 480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d
MD5 af0647b27c71ecd25099615f71519f0c
SHA1 d93145d9a17eeadf660cad5553dbd3563d1887e8
SHA512 155419ce8edc32791e6a7f36437fa04293502893ff3c58244b101d135a4c6f5fc16f17cd3a129ae7bb713a72d1b21160f27cd78a8d68535b7fae9a06e3398d3e
SSDEEP 196608:yhTb9B0BPrDz4pxgZZPy5RmStgxb/z6FDiSJXqeUh4mTrLwyFf6XnhVLc:cTb9epDz4MZZ4RmxYDiScfhHXL1Enhd
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

127.0.0.1:4782

Mutex

818ae839-3a76-430d-9a91-a5d95df53d20

Attributes

encryption_key
B306A0AD894CAA4C98B8026E839926BE1A49965E
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 payload 1 IoCs

resource	yara_rule
behavioral2/memory/1744-145-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5048 set thread context of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe
5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe
Token: SeDebugPrivilege	1744	RegAsm.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1744	RegAsm.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1744	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1744	RegAsm.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 3252	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	91
PID 5048 wrote to memory of 3252	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	91
PID 5048 wrote to memory of 3252	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	91
PID 5048 wrote to memory of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92
PID 5048 wrote to memory of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92
PID 5048 wrote to memory of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92
PID 5048 wrote to memory of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92
PID 5048 wrote to memory of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92
PID 5048 wrote to memory of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92
PID 5048 wrote to memory of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92
PID 5048 wrote to memory of 1744	5048	480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe	92

C:\Users\Admin\AppData\Local\Temp\480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe
"C:\Users\Admin\AppData\Local\Temp\480f481f15179f3009791744f5e16f0fd4868da9b1e68cbeeab729d12f3ddd3d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:3252
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:1744

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1744-145-0x0000000000400000-0x0000000000724000-memory.dmp

Download

memory/1744-151-0x0000000005920000-0x0000000005930000-memory.dmp

Download

memory/1744-150-0x0000000006E50000-0x0000000006F02000-memory.dmp

Download

memory/1744-149-0x0000000006BF0000-0x0000000006C40000-memory.dmp

Download

memory/1744-148-0x0000000007060000-0x0000000007678000-memory.dmp

Download

memory/1744-147-0x0000000005920000-0x0000000005930000-memory.dmp

Download

memory/5048-137-0x0000000007880000-0x00000000078F6000-memory.dmp

Download

memory/5048-140-0x000000000A2D0000-0x000000000A2EE000-memory.dmp

Download

memory/5048-141-0x000000000BDC0000-0x000000000C364000-memory.dmp

Download

memory/5048-142-0x000000000B8B0000-0x000000000B942000-memory.dmp

Download

memory/5048-143-0x000000000B8A0000-0x000000000B8AA000-memory.dmp

Download

memory/5048-144-0x0000000006030000-0x0000000006040000-memory.dmp

Download

memory/5048-139-0x0000000009330000-0x0000000009338000-memory.dmp

Download

memory/5048-138-0x00000000090F0000-0x00000000090F8000-memory.dmp

Download

memory/5048-133-0x00000000009E0000-0x0000000001536000-memory.dmp

Download

memory/5048-136-0x0000000003840000-0x0000000003848000-memory.dmp

Download

memory/5048-135-0x0000000006010000-0x000000000602A000-memory.dmp

Download

memory/5048-134-0x0000000006030000-0x0000000006040000-memory.dmp

Download