quasar | fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f

Analysis

max time kernel
151s
max time network
151s
platform
windows7_x64
resource
win7v20201028
submitted
01/03/2021, 23:17

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General

Target

fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
Size

534KB
MD5

1a6cd9334c846e9aadb214cce3c0359a
SHA1

04536a296bb91ca1b702a2eb8d90fff8a9fe5845
SHA256

fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f
SHA512

3e4c35c019076621c785728128c4faf29926371d69a01482558df233de1c74062f77700e6aec1e69f7eec82c11c6f1a21d96e90f0decc189c4ff71f11338bf83

Score

10^/10

quasar venomrat evasion rat rootkit spyware stealer trojan

Malware Config

Signatures

Contains code to disable Windows Defender 3 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/files/0x00050000000130e6-7.dat	disable_win_def
behavioral1/files/0x00050000000130e6-9.dat	disable_win_def
behavioral1/files/0x00050000000130e6-10.dat	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat

Executes dropped EXE 1 IoCs

pid	Process
1312	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.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
4	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
2036	schtasks.exe
1536	schtasks.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1476	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1500	powershell.exe
1500	powershell.exe
528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
1392	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
Token: SeDebugPrivilege	1500	powershell.exe
Token: SeDebugPrivilege	1312	Client.exe
Token: SeDebugPrivilege	1312	Client.exe
Token: SeDebugPrivilege	1392	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1312	Client.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 528 wrote to memory of 2036	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	30
PID 528 wrote to memory of 2036	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	30
PID 528 wrote to memory of 2036	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	30
PID 528 wrote to memory of 2036	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	30
PID 528 wrote to memory of 1312	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	32
PID 528 wrote to memory of 1312	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	32
PID 528 wrote to memory of 1312	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	32
PID 528 wrote to memory of 1312	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	32
PID 528 wrote to memory of 1500	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	33
PID 528 wrote to memory of 1500	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	33
PID 528 wrote to memory of 1500	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	33
PID 528 wrote to memory of 1500	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	33
PID 1312 wrote to memory of 1536	1312	Client.exe	35
PID 1312 wrote to memory of 1536	1312	Client.exe	35
PID 1312 wrote to memory of 1536	1312	Client.exe	35
PID 1312 wrote to memory of 1536	1312	Client.exe	35
PID 528 wrote to memory of 300	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	37
PID 528 wrote to memory of 300	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	37
PID 528 wrote to memory of 300	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	37
PID 528 wrote to memory of 300	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	37
PID 300 wrote to memory of 852	300	cmd.exe	39
PID 300 wrote to memory of 852	300	cmd.exe	39
PID 300 wrote to memory of 852	300	cmd.exe	39
PID 300 wrote to memory of 852	300	cmd.exe	39
PID 528 wrote to memory of 1964	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	40
PID 528 wrote to memory of 1964	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	40
PID 528 wrote to memory of 1964	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	40
PID 528 wrote to memory of 1964	528	fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe	40
PID 1964 wrote to memory of 1708	1964	cmd.exe	42
PID 1964 wrote to memory of 1708	1964	cmd.exe	42
PID 1964 wrote to memory of 1708	1964	cmd.exe	42
PID 1964 wrote to memory of 1708	1964	cmd.exe	42
PID 1964 wrote to memory of 1476	1964	cmd.exe	43
PID 1964 wrote to memory of 1476	1964	cmd.exe	43
PID 1964 wrote to memory of 1476	1964	cmd.exe	43
PID 1964 wrote to memory of 1476	1964	cmd.exe	43
PID 1964 wrote to memory of 1392	1964	cmd.exe	44
PID 1964 wrote to memory of 1392	1964	cmd.exe	44
PID 1964 wrote to memory of 1392	1964	cmd.exe	44
PID 1964 wrote to memory of 1392	1964	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
"C:\Users\Admin\AppData\Local\Temp\fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:528
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "CheckerFortnite" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2036
- 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:1312
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "CheckerFortnite" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1536
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1500
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:300
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:852
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\aevne0M47wzU.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1964
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1708
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1476
- - C:\Users\Admin\AppData\Local\Temp\fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe
    "C:\Users\Admin\AppData\Local\Temp\fbebdf6e8fa43a2458cd66a14dfa5b7127727c55b93a67f40f400e8c48b6a92f.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1392

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/528-3-0x0000000000320000-0x0000000000321000-memory.dmp

Filesize
4KB

Download
memory/528-5-0x0000000004A50000-0x0000000004A51000-memory.dmp

Filesize
4KB

Download
memory/528-2-0x0000000074DC0000-0x00000000754AE000-memory.dmp

Filesize
6.9MB

Download
memory/1312-12-0x0000000074DC0000-0x00000000754AE000-memory.dmp

Filesize
6.9MB

Download
memory/1312-13-0x00000000010B0000-0x00000000010B1000-memory.dmp

Filesize
4KB

Download
memory/1312-16-0x0000000004AA0000-0x0000000004AA1000-memory.dmp

Filesize
4KB

Download
memory/1392-65-0x0000000074DC0000-0x00000000754AE000-memory.dmp

Filesize
6.9MB

Download
memory/1392-66-0x0000000000A80000-0x0000000000A81000-memory.dmp

Filesize
4KB

Download
memory/1392-68-0x0000000004DC0000-0x0000000004DC1000-memory.dmp

Filesize
4KB

Download
memory/1500-56-0x0000000006320000-0x0000000006321000-memory.dmp

Filesize
4KB

Download
memory/1500-21-0x0000000004A22000-0x0000000004A23000-memory.dmp

Filesize
4KB

Download
memory/1500-24-0x0000000005310000-0x0000000005311000-memory.dmp

Filesize
4KB

Download
memory/1500-27-0x0000000005670000-0x0000000005671000-memory.dmp

Filesize
4KB

Download
memory/1500-32-0x00000000056D0000-0x00000000056D1000-memory.dmp

Filesize
4KB

Download
memory/1500-33-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1500-34-0x00000000060C0000-0x00000000060C1000-memory.dmp

Filesize
4KB

Download
memory/1500-41-0x00000000062B0000-0x00000000062B1000-memory.dmp

Filesize
4KB

Download
memory/1500-42-0x00000000055F0000-0x00000000055F1000-memory.dmp

Filesize
4KB

Download
memory/1500-57-0x0000000006330000-0x0000000006331000-memory.dmp

Filesize
4KB

Download
memory/1500-23-0x0000000002280000-0x0000000002281000-memory.dmp

Filesize
4KB

Download
memory/1500-20-0x0000000004A20000-0x0000000004A21000-memory.dmp

Filesize
4KB

Download
memory/1500-15-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/1500-19-0x0000000004A60000-0x0000000004A61000-memory.dmp

Filesize
4KB

Download
memory/1500-17-0x0000000074DC0000-0x00000000754AE000-memory.dmp

Filesize
6.9MB

Download
memory/1500-18-0x0000000001DC0000-0x0000000001DC1000-memory.dmp

Filesize
4KB

Download