quasar | 2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb

Analysis

max time kernel
134s
max time network
142s
platform
windows7_x64
resource
win7v20201028
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 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/0x00050000000130e0-7.dat	disable_win_def
behavioral1/files/0x00050000000130e0-9.dat	disable_win_def
behavioral1/files/0x00050000000130e0-10.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
1084	Injector.exe

Loads dropped DLL 1 IoCs

pid	Process
1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.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
2	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
1728	schtasks.exe
324	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	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1580	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1376	powershell.exe
1376	powershell.exe
1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
1720	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
Token: SeDebugPrivilege	1376	powershell.exe
Token: SeDebugPrivilege	1084	Injector.exe
Token: SeDebugPrivilege	1084	Injector.exe
Token: SeDebugPrivilege	1720	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1888 wrote to memory of 1728	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	30
PID 1888 wrote to memory of 1728	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	30
PID 1888 wrote to memory of 1728	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	30
PID 1888 wrote to memory of 1728	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	30
PID 1888 wrote to memory of 1084	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	32
PID 1888 wrote to memory of 1084	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	32
PID 1888 wrote to memory of 1084	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	32
PID 1888 wrote to memory of 1084	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	32
PID 1888 wrote to memory of 1376	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	33
PID 1888 wrote to memory of 1376	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	33
PID 1888 wrote to memory of 1376	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	33
PID 1888 wrote to memory of 1376	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	33
PID 1084 wrote to memory of 324	1084	Injector.exe	35
PID 1084 wrote to memory of 324	1084	Injector.exe	35
PID 1084 wrote to memory of 324	1084	Injector.exe	35
PID 1084 wrote to memory of 324	1084	Injector.exe	35
PID 1888 wrote to memory of 540	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	37
PID 1888 wrote to memory of 540	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	37
PID 1888 wrote to memory of 540	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	37
PID 1888 wrote to memory of 540	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	37
PID 540 wrote to memory of 1928	540	cmd.exe	39
PID 540 wrote to memory of 1928	540	cmd.exe	39
PID 540 wrote to memory of 1928	540	cmd.exe	39
PID 540 wrote to memory of 1928	540	cmd.exe	39
PID 1888 wrote to memory of 1620	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	40
PID 1888 wrote to memory of 1620	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	40
PID 1888 wrote to memory of 1620	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	40
PID 1888 wrote to memory of 1620	1888	2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe	40
PID 1620 wrote to memory of 1572	1620	cmd.exe	42
PID 1620 wrote to memory of 1572	1620	cmd.exe	42
PID 1620 wrote to memory of 1572	1620	cmd.exe	42
PID 1620 wrote to memory of 1572	1620	cmd.exe	42
PID 1620 wrote to memory of 1580	1620	cmd.exe	43
PID 1620 wrote to memory of 1580	1620	cmd.exe	43
PID 1620 wrote to memory of 1580	1620	cmd.exe	43
PID 1620 wrote to memory of 1580	1620	cmd.exe	43
PID 1620 wrote to memory of 1720	1620	cmd.exe	44
PID 1620 wrote to memory of 1720	1620	cmd.exe	44
PID 1620 wrote to memory of 1720	1620	cmd.exe	44
PID 1620 wrote to memory of 1720	1620	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe
"C:\Users\Admin\AppData\Local\Temp\2c73be6b374db37dd28a204f49d78a61ebcc678a9164828b9f01e50e06ece3cb.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1888
- 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:1728
- 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:1084
- - 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:324
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1376
- 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:540
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1928
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\w1knvFO7Svkh.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1620
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1572
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1580
- - 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:1720

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/1084-13-0x00000000011E0000-0x00000000011E1000-memory.dmp

Filesize
4KB

Download
memory/1084-17-0x0000000004A00000-0x0000000004A01000-memory.dmp

Filesize
4KB

Download
memory/1084-12-0x0000000074320000-0x0000000074A0E000-memory.dmp

Filesize
6.9MB

Download
memory/1376-21-0x0000000004990000-0x0000000004991000-memory.dmp

Filesize
4KB

Download
memory/1376-33-0x00000000061F0000-0x00000000061F1000-memory.dmp

Filesize
4KB

Download
memory/1376-16-0x0000000074320000-0x0000000074A0E000-memory.dmp

Filesize
6.9MB

Download
memory/1376-18-0x0000000001F90000-0x0000000001F91000-memory.dmp

Filesize
4KB

Download
memory/1376-19-0x00000000049D0000-0x00000000049D1000-memory.dmp

Filesize
4KB

Download
memory/1376-20-0x00000000023C0000-0x00000000023C1000-memory.dmp

Filesize
4KB

Download
memory/1376-22-0x0000000004992000-0x0000000004993000-memory.dmp

Filesize
4KB

Download
memory/1376-15-0x0000000075781000-0x0000000075783000-memory.dmp

Filesize
8KB

Download
memory/1376-23-0x0000000002730000-0x0000000002731000-memory.dmp

Filesize
4KB

Download
memory/1376-57-0x0000000006330000-0x0000000006331000-memory.dmp

Filesize
4KB

Download
memory/1376-27-0x00000000056B0000-0x00000000056B1000-memory.dmp

Filesize
4KB

Download
memory/1376-32-0x0000000005710000-0x0000000005711000-memory.dmp

Filesize
4KB

Download
memory/1376-56-0x0000000006320000-0x0000000006321000-memory.dmp

Filesize
4KB

Download
memory/1376-40-0x0000000006190000-0x0000000006191000-memory.dmp

Filesize
4KB

Download
memory/1376-41-0x0000000005630000-0x0000000005631000-memory.dmp

Filesize
4KB

Download
memory/1376-45-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1720-68-0x00000000048E0000-0x00000000048E1000-memory.dmp

Filesize
4KB

Download
memory/1720-66-0x0000000000330000-0x0000000000331000-memory.dmp

Filesize
4KB

Download
memory/1720-65-0x0000000074320000-0x0000000074A0E000-memory.dmp

Filesize
6.9MB

Download
memory/1888-2-0x0000000074320000-0x0000000074A0E000-memory.dmp

Filesize
6.9MB

Download
memory/1888-3-0x0000000000070000-0x0000000000071000-memory.dmp

Filesize
4KB

Download
memory/1888-5-0x00000000006B0000-0x00000000006B1000-memory.dmp

Filesize
4KB

Download