quasar | 2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb

Analysis

max time kernel
138s
max time network
149s
platform
windows10_x64
resource
win10v20201028
submitted
02-03-2021 21:33

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General

Target

2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
Size

534KB
MD5

fda53610c25408e427c84eebdc5b8ec2
SHA1

13830e44fb35c5f6d4750abd620ecb4df85e7a6a
SHA256

2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb
SHA512

617b6fb67057c7207cbe9f73be85b6f4d9d69462aee9b526a1bea085d1c101f7ff9da98da6a0e266bd49cafc41c0cdb741453bc76e9c09011bf4f1ec446f52e7

Score

10^/10

quasar venomrat evasion rat rootkit spyware stealer trojan

Malware Config

Signatures

Contains code to disable Windows Defender 2 IoCs

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

resource	yara_rule
behavioral2/files/0x000100000001ab48-13.dat	disable_win_def
behavioral2/files/0x000100000001ab48-14.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
200	Injector.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	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.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
10	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
2664	schtasks.exe
3840	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2108	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3660	powershell.exe
3660	powershell.exe
3660	powershell.exe
3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
2472	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
Token: SeDebugPrivilege	3660	powershell.exe
Token: SeDebugPrivilege	200	Injector.exe
Token: SeDebugPrivilege	200	Injector.exe
Token: SeDebugPrivilege	2472	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 2664	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	75
PID 3132 wrote to memory of 2664	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	75
PID 3132 wrote to memory of 2664	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	75
PID 3132 wrote to memory of 200	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	77
PID 3132 wrote to memory of 200	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	77
PID 3132 wrote to memory of 200	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	77
PID 3132 wrote to memory of 3660	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	78
PID 3132 wrote to memory of 3660	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	78
PID 3132 wrote to memory of 3660	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	78
PID 200 wrote to memory of 3840	200	Injector.exe	80
PID 200 wrote to memory of 3840	200	Injector.exe	80
PID 200 wrote to memory of 3840	200	Injector.exe	80
PID 3132 wrote to memory of 1292	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	85
PID 3132 wrote to memory of 1292	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	85
PID 3132 wrote to memory of 1292	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	85
PID 1292 wrote to memory of 3876	1292	cmd.exe	87
PID 1292 wrote to memory of 3876	1292	cmd.exe	87
PID 1292 wrote to memory of 3876	1292	cmd.exe	87
PID 3132 wrote to memory of 1644	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	88
PID 3132 wrote to memory of 1644	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	88
PID 3132 wrote to memory of 1644	3132	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	88
PID 1644 wrote to memory of 208	1644	cmd.exe	90
PID 1644 wrote to memory of 208	1644	cmd.exe	90
PID 1644 wrote to memory of 208	1644	cmd.exe	90
PID 1644 wrote to memory of 2108	1644	cmd.exe	91
PID 1644 wrote to memory of 2108	1644	cmd.exe	91
PID 1644 wrote to memory of 2108	1644	cmd.exe	91
PID 1644 wrote to memory of 2472	1644	cmd.exe	92
PID 1644 wrote to memory of 2472	1644	cmd.exe	92
PID 1644 wrote to memory of 2472	1644	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
"C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe"
1⤵
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Injector" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2664
- C:\Users\Admin\AppData\Roaming\SubDir\Injector.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Injector.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:200
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Injector" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Injector.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:3840
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3660
- 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:1292
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:3876
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\AtsCstErgLSk.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1644
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:208
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:2108
- - C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
    "C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2472

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

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/200-57-0x00000000069C0000-0x00000000069C1000-memory.dmp

Filesize
4KB

Download
memory/200-24-0x0000000005300000-0x0000000005301000-memory.dmp

Filesize
4KB

Download
memory/200-15-0x00000000738C0000-0x0000000073FAE000-memory.dmp

Filesize
6.9MB

Download
memory/2472-69-0x00000000059D0000-0x00000000059D1000-memory.dmp

Filesize
4KB

Download
memory/2472-64-0x00000000738C0000-0x0000000073FAE000-memory.dmp

Filesize
6.9MB

Download
memory/3132-10-0x0000000005AB0000-0x0000000005AB1000-memory.dmp

Filesize
4KB

Download
memory/3132-9-0x0000000004EB0000-0x0000000004EB1000-memory.dmp

Filesize
4KB

Download
memory/3132-8-0x0000000004B80000-0x0000000004B81000-memory.dmp

Filesize
4KB

Download
memory/3132-7-0x0000000004970000-0x0000000004971000-memory.dmp

Filesize
4KB

Download
memory/3132-6-0x00000000049E0000-0x00000000049E1000-memory.dmp

Filesize
4KB

Download
memory/3132-5-0x0000000004EE0000-0x0000000004EE1000-memory.dmp

Filesize
4KB

Download
memory/3132-2-0x00000000738C0000-0x0000000073FAE000-memory.dmp

Filesize
6.9MB

Download
memory/3132-3-0x0000000000070000-0x0000000000071000-memory.dmp

Filesize
4KB

Download
memory/3660-31-0x0000000007630000-0x0000000007631000-memory.dmp

Filesize
4KB

Download
memory/3660-35-0x0000000006D80000-0x0000000006D81000-memory.dmp

Filesize
4KB

Download
memory/3660-37-0x0000000007D20000-0x0000000007D21000-memory.dmp

Filesize
4KB

Download
memory/3660-39-0x0000000008A50000-0x0000000008A83000-memory.dmp

Filesize
204KB

Download
memory/3660-46-0x000000007E390000-0x000000007E391000-memory.dmp

Filesize
4KB

Download
memory/3660-47-0x0000000008A30000-0x0000000008A31000-memory.dmp

Filesize
4KB

Download
memory/3660-48-0x0000000008B80000-0x0000000008B81000-memory.dmp

Filesize
4KB

Download
memory/3660-49-0x0000000008F70000-0x0000000008F71000-memory.dmp

Filesize
4KB

Download
memory/3660-50-0x00000000067E3000-0x00000000067E4000-memory.dmp

Filesize
4KB

Download
memory/3660-51-0x0000000008F20000-0x0000000008F21000-memory.dmp

Filesize
4KB

Download
memory/3660-53-0x0000000008F10000-0x0000000008F11000-memory.dmp

Filesize
4KB

Download
memory/3660-36-0x0000000007A40000-0x0000000007A41000-memory.dmp

Filesize
4KB

Download
memory/3660-21-0x00000000738C0000-0x0000000073FAE000-memory.dmp

Filesize
6.9MB

Download
memory/3660-28-0x0000000006CB0000-0x0000000006CB1000-memory.dmp

Filesize
4KB

Download
memory/3660-27-0x0000000006C10000-0x0000000006C11000-memory.dmp

Filesize
4KB

Download
memory/3660-26-0x00000000067E2000-0x00000000067E3000-memory.dmp

Filesize
4KB

Download
memory/3660-25-0x00000000067E0000-0x00000000067E1000-memory.dmp

Filesize
4KB

Download
memory/3660-23-0x0000000006E20000-0x0000000006E21000-memory.dmp

Filesize
4KB

Download
memory/3660-22-0x0000000004190000-0x0000000004191000-memory.dmp

Filesize
4KB

Download