quasar | 6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb

Analysis

max time kernel
44s
max time network
114s
platform
windows10_x64
resource
win10v20201028
submitted
09/11/2020, 20:48

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General

Target
6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe
Size 1.0MB
Sample201109-95t7fycfm2
SHA256 6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb
MD5 9552d42a9e5735934051d1a7112f9b95
SHA1 be718124814f3c94bdd3627196dc638e0eb571e2
SHA512 d0934a5c1a81f988df49423ea4af0f692029d909270b3b3a1748c5e1b3292e0adf70b125fa87f51e9c48a82db1c0fc2fe01203263437d292c24cc722559f36d6
MD5 SHA1 SHA512

Score

10^/10

quasar persistence spyware trojan

Malware Config

Signatures

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

ServiceHost packer 15 IoCs

Detects ServiceHost packer used for .NET malware

resource	yara_rule
behavioral2/memory/3144-20-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-19-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-21-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-23-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-22-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-24-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-26-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-25-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-27-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-28-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-29-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-31-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-32-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-30-0x000000000045819E-mapping.dmp	servicehost
behavioral2/memory/3144-33-0x000000000045819E-mapping.dmp	servicehost

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\ProPlayer = "C:\\Users\\Admin\\AppData\\Roaming\\ProPlayer\\Player.exe.exe"	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
16	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4692 set thread context of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4000	3144	WerFault.exe	78

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
4340	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2056	PING.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe
4000	WerFault.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3144	RegSvcs.exe
Token: SeRestorePrivilege	4000	WerFault.exe
Token: SeBackupPrivilege	4000	WerFault.exe
Token: SeDebugPrivilege	4000	WerFault.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe
3144	RegSvcs.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4692 wrote to memory of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78
PID 4692 wrote to memory of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78
PID 4692 wrote to memory of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78
PID 4692 wrote to memory of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78
PID 4692 wrote to memory of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78
PID 4692 wrote to memory of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78
PID 4692 wrote to memory of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78
PID 4692 wrote to memory of 3144	4692	6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe	78
PID 3144 wrote to memory of 4340	3144	RegSvcs.exe	79
PID 3144 wrote to memory of 4340	3144	RegSvcs.exe	79
PID 3144 wrote to memory of 4340	3144	RegSvcs.exe	79
PID 3144 wrote to memory of 560	3144	RegSvcs.exe	81
PID 3144 wrote to memory of 560	3144	RegSvcs.exe	81
PID 3144 wrote to memory of 560	3144	RegSvcs.exe	81
PID 560 wrote to memory of 4032	560	cmd.exe	83
PID 560 wrote to memory of 4032	560	cmd.exe	83
PID 560 wrote to memory of 4032	560	cmd.exe	83
PID 560 wrote to memory of 2056	560	cmd.exe	85
PID 560 wrote to memory of 2056	560	cmd.exe	85
PID 560 wrote to memory of 2056	560	cmd.exe	85
PID 560 wrote to memory of 804	560	cmd.exe	87
PID 560 wrote to memory of 804	560	cmd.exe	87
PID 560 wrote to memory of 804	560	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe
"C:\Users\Admin\AppData\Local\Temp\6df8ea96addb668a51442b4b3287c1294f0e834333c068f3853cb95016dceaeb.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4692
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3144
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Client Startup" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4340
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\fEmFvaY40WsL.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:560
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:4032
  - - C:\Windows\SysWOW64\PING.EXE
      ping -n 10 localhost
      4⤵
      Runs ping.exe
      PID:2056
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      4⤵
      PID:804
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3144 -s 2096
    3⤵
    - Program crash
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/804-40-0x0000000002480000-0x0000000002481000-memory.dmp

Download

memory/804-39-0x0000000004A40000-0x0000000004A41000-memory.dmp

Download

memory/804-38-0x00000000002A0000-0x00000000002A1000-memory.dmp

Download

memory/804-37-0x0000000073B00000-0x00000000741EE000-memory.dmp

Download

memory/3144-4-0x0000000073B00000-0x00000000741EE000-memory.dmp

Download

memory/3144-11-0x00000000063B0000-0x00000000063B1000-memory.dmp

Download

memory/3144-7-0x00000000056C0000-0x00000000056C1000-memory.dmp

Download

memory/3144-2-0x0000000000400000-0x000000000045E000-memory.dmp

Download

memory/3144-13-0x0000000006730000-0x0000000006731000-memory.dmp

Download

memory/3144-8-0x0000000005280000-0x0000000005281000-memory.dmp

Download

memory/3144-10-0x0000000005FE0000-0x0000000005FE1000-memory.dmp

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memory/3144-9-0x0000000005320000-0x0000000005321000-memory.dmp

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memory/4000-34-0x0000000004DE0000-0x0000000004DE1000-memory.dmp

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memory/4000-18-0x00000000047A0000-0x00000000047A1000-memory.dmp

Download