quasar | 22101f7ae824387a41052dfc0891096efb5ab47859727131465eeadcc1412a58

General

Target

7289c479c6a3839e87342411a5a49c54.exe
Size

657KB
MD5

7289c479c6a3839e87342411a5a49c54
SHA1

baf866517df277c66f2c13168b15119ba3ec3a92
SHA256

22101f7ae824387a41052dfc0891096efb5ab47859727131465eeadcc1412a58
SHA512

17397fe4a4d2bae32854d917ba706c37e266ab1cc1b8e9a41bb13a7ca92348aa894169388a4d5f96f1b9e31f40ee358caa07d537c9f67b94c2f3f219905eadc1
SSDEEP

12288:lVBbFriWGl7gO03m4sRqJ2IOEEVR/7r+pKnoqsxWbvoyF3db6e0RqsA7M:vBxrd4lA7OvR/fqKoqsxsvoyFtbsqsF

Score

10^/10

quasar venomrat windows firewall evasion persistence rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows firewall

C2

23.105.131.187:7812

Mutex

VNM_MUTEX_zGeT5SjdI1pYgFyiav

Attributes

encryption_key
3kpwI2tkVNrXY2Mm5wlR
install_name
Windows Security.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Update
subdirectory
Windows Firewall Updates

Signatures

Contains code to disable Windows Defender 6 IoCs

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

Processes:

resource	yara_rule
behavioral1/memory/2416-9-0x0000000000400000-0x000000000048C000-memory.dmp	disable_win_def
behavioral1/memory/2416-11-0x0000000000400000-0x000000000048C000-memory.dmp	disable_win_def
behavioral1/memory/2416-15-0x0000000000400000-0x000000000048C000-memory.dmp	disable_win_def
behavioral1/memory/2416-17-0x0000000000400000-0x000000000048C000-memory.dmp	disable_win_def
behavioral1/memory/2416-19-0x0000000000400000-0x000000000048C000-memory.dmp	disable_win_def
behavioral1/memory/2416-56-0x0000000000630000-0x0000000000670000-memory.dmp	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

Processes:

7289c479c6a3839e87342411a5a49c54.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	7289c479c6a3839e87342411a5a49c54.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	7289c479c6a3839e87342411a5a49c54.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	7289c479c6a3839e87342411a5a49c54.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	7289c479c6a3839e87342411a5a49c54.exe

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

Quasar payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2416-9-0x0000000000400000-0x000000000048C000-memory.dmp	family_quasar
behavioral1/memory/2416-11-0x0000000000400000-0x000000000048C000-memory.dmp	family_quasar
behavioral1/memory/2416-15-0x0000000000400000-0x000000000048C000-memory.dmp	family_quasar
behavioral1/memory/2416-17-0x0000000000400000-0x000000000048C000-memory.dmp	family_quasar
behavioral1/memory/2416-19-0x0000000000400000-0x000000000048C000-memory.dmp	family_quasar
behavioral1/memory/2416-56-0x0000000000630000-0x0000000000670000-memory.dmp	family_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 2 IoCs

Processes:

Windows Security.exeWindows Security.exe

pid process

2596 Windows Security.exe
2084 Windows Security.exe
Loads dropped DLL 2 IoCs

Processes:

7289c479c6a3839e87342411a5a49c54.exeWindows Security.exe

pid process

2416 7289c479c6a3839e87342411a5a49c54.exe
2596 Windows Security.exe

pid	process
2596	Windows Security.exe
2084	Windows Security.exe

pid	process
2416	7289c479c6a3839e87342411a5a49c54.exe
2596	Windows Security.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

7289c479c6a3839e87342411a5a49c54.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	7289c479c6a3839e87342411a5a49c54.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	7289c479c6a3839e87342411a5a49c54.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

7289c479c6a3839e87342411a5a49c54.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\QwXMCzbSAJ = "C:\\Users\\Admin\\AppData\\Roaming\\jXMDeSqECF\\tEWMqGdDFT.exe"	7289c479c6a3839e87342411a5a49c54.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.

Processes:

flow ioc

2 ip-api.com

flow	ioc
2	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

Processes:

7289c479c6a3839e87342411a5a49c54.exeWindows Security.exe

description	pid	process	target process
PID 1680 set thread context of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 2596 set thread context of 2084	2596	Windows Security.exe	Windows Security.exe

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

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/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1808 schtasks.exe
2760 schtasks.exe

pid	process
1808	schtasks.exe
2760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

powershell.exe7289c479c6a3839e87342411a5a49c54.exe

pid	process
2668	powershell.exe
2416	7289c479c6a3839e87342411a5a49c54.exe
2416	7289c479c6a3839e87342411a5a49c54.exe
2416	7289c479c6a3839e87342411a5a49c54.exe
2416	7289c479c6a3839e87342411a5a49c54.exe
2416	7289c479c6a3839e87342411a5a49c54.exe
2416	7289c479c6a3839e87342411a5a49c54.exe
2416	7289c479c6a3839e87342411a5a49c54.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

7289c479c6a3839e87342411a5a49c54.exepowershell.exeWindows Security.exe

description	pid	process
Token: SeDebugPrivilege	2416	7289c479c6a3839e87342411a5a49c54.exe
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeDebugPrivilege	2084	Windows Security.exe
Token: SeDebugPrivilege	2084	Windows Security.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Windows Security.exe

pid process

2084 Windows Security.exe

pid	process
2084	Windows Security.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

7289c479c6a3839e87342411a5a49c54.exe7289c479c6a3839e87342411a5a49c54.exeWindows Security.exeWindows Security.execmd.exe

description	pid	process	target process
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 1680 wrote to memory of 2416	1680	7289c479c6a3839e87342411a5a49c54.exe	7289c479c6a3839e87342411a5a49c54.exe
PID 2416 wrote to memory of 2760	2416	7289c479c6a3839e87342411a5a49c54.exe	schtasks.exe
PID 2416 wrote to memory of 2760	2416	7289c479c6a3839e87342411a5a49c54.exe	schtasks.exe
PID 2416 wrote to memory of 2760	2416	7289c479c6a3839e87342411a5a49c54.exe	schtasks.exe
PID 2416 wrote to memory of 2760	2416	7289c479c6a3839e87342411a5a49c54.exe	schtasks.exe
PID 2416 wrote to memory of 2596	2416	7289c479c6a3839e87342411a5a49c54.exe	Windows Security.exe
PID 2416 wrote to memory of 2596	2416	7289c479c6a3839e87342411a5a49c54.exe	Windows Security.exe
PID 2416 wrote to memory of 2596	2416	7289c479c6a3839e87342411a5a49c54.exe	Windows Security.exe
PID 2416 wrote to memory of 2596	2416	7289c479c6a3839e87342411a5a49c54.exe	Windows Security.exe
PID 2416 wrote to memory of 2668	2416	7289c479c6a3839e87342411a5a49c54.exe	powershell.exe
PID 2416 wrote to memory of 2668	2416	7289c479c6a3839e87342411a5a49c54.exe	powershell.exe
PID 2416 wrote to memory of 2668	2416	7289c479c6a3839e87342411a5a49c54.exe	powershell.exe
PID 2416 wrote to memory of 2668	2416	7289c479c6a3839e87342411a5a49c54.exe	powershell.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2596 wrote to memory of 2084	2596	Windows Security.exe	Windows Security.exe
PID 2084 wrote to memory of 1808	2084	Windows Security.exe	schtasks.exe
PID 2084 wrote to memory of 1808	2084	Windows Security.exe	schtasks.exe
PID 2084 wrote to memory of 1808	2084	Windows Security.exe	schtasks.exe
PID 2084 wrote to memory of 1808	2084	Windows Security.exe	schtasks.exe
PID 2416 wrote to memory of 3028	2416	7289c479c6a3839e87342411a5a49c54.exe	cmd.exe
PID 2416 wrote to memory of 3028	2416	7289c479c6a3839e87342411a5a49c54.exe	cmd.exe
PID 2416 wrote to memory of 3028	2416	7289c479c6a3839e87342411a5a49c54.exe	cmd.exe
PID 2416 wrote to memory of 3028	2416	7289c479c6a3839e87342411a5a49c54.exe	cmd.exe
PID 3028 wrote to memory of 2304	3028	cmd.exe	cmd.exe
PID 3028 wrote to memory of 2304	3028	cmd.exe	cmd.exe
PID 3028 wrote to memory of 2304	3028	cmd.exe	cmd.exe
PID 3028 wrote to memory of 2304	3028	cmd.exe	cmd.exe
PID 2416 wrote to memory of 2000	2416	7289c479c6a3839e87342411a5a49c54.exe	cmd.exe
PID 2416 wrote to memory of 2000	2416	7289c479c6a3839e87342411a5a49c54.exe	cmd.exe
PID 2416 wrote to memory of 2000	2416	7289c479c6a3839e87342411a5a49c54.exe	cmd.exe
PID 2416 wrote to memory of 2000	2416	7289c479c6a3839e87342411a5a49c54.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\7289c479c6a3839e87342411a5a49c54.exe
"C:\Users\Admin\AppData\Local\Temp\7289c479c6a3839e87342411a5a49c54.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Users\Admin\AppData\Local\Temp\7289c479c6a3839e87342411a5a49c54.exe
  "C:\Users\Admin\AppData\Local\Temp\7289c479c6a3839e87342411a5a49c54.exe"
  2⤵
  - Modifies Windows Defender Real-time Protection settings
  - Loads dropped DLL
  - Windows security modification
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2416
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\7289c479c6a3839e87342411a5a49c54.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2760
- - C:\Users\Admin\AppData\Roaming\Windows Firewall Updates\Windows Security.exe
    "C:\Users\Admin\AppData\Roaming\Windows Firewall Updates\Windows Security.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2596
  - - C:\Users\Admin\AppData\Roaming\Windows Firewall Updates\Windows Security.exe
      "C:\Users\Admin\AppData\Roaming\Windows Firewall Updates\Windows Security.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2084
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Firewall Updates\Windows Security.exe" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1808
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Get-MpPreference -verbose
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2668
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3028
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
      4⤵
      PID:2304
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\hQzltZe58GoO.bat" "
    3⤵
    PID:2000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

Scheduled Task/Job

Defense Evasion

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Cab7EB3.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar7F33.tmp

Filesize
171KB

MD5
9c0c641c06238516f27941aa1166d427

SHA1
64cd549fb8cf014fcd9312aa7a5b023847b6c977

SHA256
4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

SHA512
936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

Download Submit
C:\Users\Admin\AppData\Local\Temp\hQzltZe58GoO.bat

Filesize
229B

MD5
de52fe68353d7721e700da3e6298febc

SHA1
6726d0c0cc7d9111afffb6e8c33f259a065ae3d2

SHA256
c7041f3b4933130187e6d0d7ee89ed2c34a176e15271ae347ec633f755eb2d50

SHA512
ea5819f3adaeb4ea46ed162ac25ed8824e72bca6576cc716f9d7b1502866c0edb447999fd7f8e1cc77d1c738fae181dc6a8d9b0b81af9084df9a72b50b39021a

Download Submit
\Users\Admin\AppData\Roaming\Windows Firewall Updates\Windows Security.exe

Filesize
657KB

MD5
7289c479c6a3839e87342411a5a49c54

SHA1
baf866517df277c66f2c13168b15119ba3ec3a92

SHA256
22101f7ae824387a41052dfc0891096efb5ab47859727131465eeadcc1412a58

SHA512
17397fe4a4d2bae32854d917ba706c37e266ab1cc1b8e9a41bb13a7ca92348aa894169388a4d5f96f1b9e31f40ee358caa07d537c9f67b94c2f3f219905eadc1

Download Submit
memory/1680-4-0x0000000000540000-0x000000000054A000-memory.dmp

Filesize
40KB

Download
memory/1680-20-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/1680-2-0x0000000004A40000-0x0000000004A80000-memory.dmp

Filesize
256KB

Download
memory/1680-0-0x0000000000BF0000-0x0000000000C9A000-memory.dmp

Filesize
680KB

Download
memory/1680-1-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/2084-47-0x00000000048C0000-0x0000000004900000-memory.dmp

Filesize
256KB

Download
memory/2084-46-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/2084-37-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2084-119-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/2416-9-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2416-22-0x0000000000630000-0x0000000000670000-memory.dmp

Filesize
256KB

Download
memory/2416-21-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/2416-19-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2416-17-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2416-15-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2416-118-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/2416-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2416-11-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2416-55-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/2416-7-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2416-5-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2416-56-0x0000000000630000-0x0000000000670000-memory.dmp

Filesize
256KB

Download
memory/2596-30-0x0000000000A90000-0x0000000000B3A000-memory.dmp

Filesize
680KB

Download
memory/2596-42-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/2596-31-0x0000000074300000-0x00000000749EE000-memory.dmp

Filesize
6.9MB

Download
memory/2668-54-0x000000006ECE0000-0x000000006F28B000-memory.dmp

Filesize
5.7MB

Download
memory/2668-52-0x000000006ECE0000-0x000000006F28B000-memory.dmp

Filesize
5.7MB

Download
memory/2668-51-0x00000000024E0000-0x0000000002520000-memory.dmp

Filesize
256KB

Download
memory/2668-50-0x000000006ECE0000-0x000000006F28B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads