quasar | 3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5

Analysis

max time kernel
151s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
08-05-2022 22:34

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General

Target

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
Size

1.6MB
MD5

cef80abf8c3f0cde0085f3253ab0381a
SHA1

a7de60994d1c16409700a2deccb6cb1423153967
SHA256

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5
SHA512

80e4a4dad8c49ed24226346ec769ad595e1ffa26c2167ae0e7c622a10e59cf12a2d2ec1486d7cb168cc3df963d2653be3669855ced35b67548e860573b4f850d

Score

10^/10

quasar venomrat evasion persistence rat rootkit spyware stealer suricata trojan

Malware Config

Signatures

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
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata

Executes dropped EXE 2 IoCs

Processes:

Client.exeClient.exe

pid	Process
4464	Client.exe
4372	Client.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Client.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	Client.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exeClient.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Computer_Waifu = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe\""	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Computer_Waifu = "\"C:\\Program Files (x86)\\SubDir\\Client.exe\""	Client.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
27	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 36 IoCs

Processes:

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exeClient.exeClient.exe

pid	Process
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
4464	Client.exe
4464	Client.exe
4464	Client.exe
4464	Client.exe
4464	Client.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
4464	Client.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
4464	Client.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
4464	Client.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
4464	Client.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
4372	Client.exe
4372	Client.exe
4372	Client.exe
4372	Client.exe
4372	Client.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
4372	Client.exe
4372	Client.exe
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe

Drops file in Program Files directory 4 IoCs

Processes:

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exeClient.exe

description	ioc	Process
File created	C:\Program Files (x86)\SubDir\Client.exe	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
File opened for modification	C:\Program Files (x86)\SubDir\Client.exe	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
File opened for modification	C:\Program Files (x86)\SubDir\Client.exe	Client.exe
File opened for modification	C:\Program Files (x86)\SubDir	Client.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
3996	4464	WerFault.exe	84
1736	4464	WerFault.exe	84

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

Processes:

schtasks.exeschtasks.exe

pid	Process
2364	schtasks.exe
3444	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
920	PING.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exeClient.exe

pid	Process
3972	powershell.exe
3972	powershell.exe
4372	Client.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exepowershell.exeClient.exeClient.exe

description	pid	Process
Token: SeDebugPrivilege	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
Token: SeDebugPrivilege	3972	powershell.exe
Token: SeDebugPrivilege	4464	Client.exe
Token: SeDebugPrivilege	4464	Client.exe
Token: SeDebugPrivilege	4372	Client.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exeClient.exeClient.exe

pid	Process
560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
4464	Client.exe
4464	Client.exe
4372	Client.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exeClient.execmd.exe

description	pid	Process	procid_target
PID 560 wrote to memory of 3444	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	82
PID 560 wrote to memory of 3444	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	82
PID 560 wrote to memory of 3444	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	82
PID 560 wrote to memory of 4464	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	84
PID 560 wrote to memory of 4464	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	84
PID 560 wrote to memory of 4464	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	84
PID 560 wrote to memory of 3972	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	85
PID 560 wrote to memory of 3972	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	85
PID 560 wrote to memory of 3972	560	3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe	85
PID 4464 wrote to memory of 2364	4464	Client.exe	87
PID 4464 wrote to memory of 2364	4464	Client.exe	87
PID 4464 wrote to memory of 2364	4464	Client.exe	87
PID 4464 wrote to memory of 4632	4464	Client.exe	89
PID 4464 wrote to memory of 4632	4464	Client.exe	89
PID 4464 wrote to memory of 4632	4464	Client.exe	89
PID 4632 wrote to memory of 4992	4632	cmd.exe	92
PID 4632 wrote to memory of 4992	4632	cmd.exe	92
PID 4632 wrote to memory of 4992	4632	cmd.exe	92
PID 4632 wrote to memory of 920	4632	cmd.exe	94
PID 4632 wrote to memory of 920	4632	cmd.exe	94
PID 4632 wrote to memory of 920	4632	cmd.exe	94
PID 4464 wrote to memory of 3996	4464	Client.exe	97
PID 4464 wrote to memory of 3996	4464	Client.exe	97
PID 4464 wrote to memory of 3996	4464	Client.exe	97
PID 4632 wrote to memory of 4372	4632	cmd.exe	99
PID 4632 wrote to memory of 4372	4632	cmd.exe	99
PID 4632 wrote to memory of 4372	4632	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe
"C:\Users\Admin\AppData\Local\Temp\3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe"
1⤵
- Windows security modification
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:560
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Computer_Waifu" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3444
- C:\Program Files (x86)\SubDir\Client.exe
  "C:\Program Files (x86)\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4464
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Computer_Waifu" /sc ONLOGON /tr "C:\Program Files (x86)\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2364
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\SPcoVgDA6uYr.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4632
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:4992
  - - C:\Windows\SysWOW64\PING.EXE
      ping -n 10 localhost
      4⤵
      Runs ping.exe
      PID:920
  - - C:\Program Files (x86)\SubDir\Client.exe
      "C:\Program Files (x86)\SubDir\Client.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of NtSetInformationThreadHideFromDebugger
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4372
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4464 -s 2244
    3⤵
    - Program crash
    PID:3996
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4464 -s 2244
    3⤵
    - Program crash
    PID:1736
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4464 -ip 4464
1⤵
PID:2356

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\SubDir\Client.exe

Filesize
1.6MB

MD5
cef80abf8c3f0cde0085f3253ab0381a

SHA1
a7de60994d1c16409700a2deccb6cb1423153967

SHA256
3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5

SHA512
80e4a4dad8c49ed24226346ec769ad595e1ffa26c2167ae0e7c622a10e59cf12a2d2ec1486d7cb168cc3df963d2653be3669855ced35b67548e860573b4f850d

Download Submit
C:\Program Files (x86)\SubDir\Client.exe

Filesize
1.6MB

MD5
cef80abf8c3f0cde0085f3253ab0381a

SHA1
a7de60994d1c16409700a2deccb6cb1423153967

SHA256
3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5

SHA512
80e4a4dad8c49ed24226346ec769ad595e1ffa26c2167ae0e7c622a10e59cf12a2d2ec1486d7cb168cc3df963d2653be3669855ced35b67548e860573b4f850d

Download Submit
C:\Users\Admin\AppData\Local\Temp\SPcoVgDA6uYr.bat

Filesize
199B

MD5
76c7e3021c794872d8c78d2881f9a38d

SHA1
b6bca19080086b68925c74d3243735dd5819fd62

SHA256
cefd78f3ce8babf35b2f3b44a4e9451de8277cbcc2d8597b6781a1ef4b615843

SHA512
2b0130e005f7f2482e8136d675499fd796b529eafbe113e865cc77f4d312ace850184db0206f400f25171e24e9c75343ca206b0cacc15bbdcbef10d1310d0c7a

Download Submit
\??\c:\program files (x86)\subdir\client.exe

Filesize
1.6MB

MD5
cef80abf8c3f0cde0085f3253ab0381a

SHA1
a7de60994d1c16409700a2deccb6cb1423153967

SHA256
3c408a0b4fc83fa3e387a1d45e03009340a75b1519529eb55d910e84d9e6bbe5

SHA512
80e4a4dad8c49ed24226346ec769ad595e1ffa26c2167ae0e7c622a10e59cf12a2d2ec1486d7cb168cc3df963d2653be3669855ced35b67548e860573b4f850d

Download Submit
memory/560-133-0x0000000006E20000-0x0000000006EB2000-memory.dmp

Filesize
584KB

Download
memory/560-135-0x0000000007220000-0x0000000007232000-memory.dmp

Filesize
72KB

Download
memory/560-136-0x0000000009280000-0x00000000092BC000-memory.dmp

Filesize
240KB

Download
memory/560-134-0x0000000006F30000-0x0000000006F96000-memory.dmp

Filesize
408KB

Download
memory/560-130-0x0000000000920000-0x0000000000D96000-memory.dmp

Filesize
4.5MB

Download
memory/560-132-0x00000000072F0000-0x0000000007894000-memory.dmp

Filesize
5.6MB

Download
memory/560-131-0x0000000000920000-0x0000000000D96000-memory.dmp

Filesize
4.5MB

Download
memory/920-156-0x0000000000000000-mapping.dmp

Download
memory/2364-148-0x0000000000000000-mapping.dmp

Download
memory/3444-137-0x0000000000000000-mapping.dmp

Download
memory/3972-146-0x0000000004F50000-0x0000000004FB6000-memory.dmp

Filesize
408KB

Download
memory/3972-160-0x00000000071B0000-0x00000000071BA000-memory.dmp

Filesize
40KB

Download
memory/3972-144-0x0000000004FE0000-0x0000000005608000-memory.dmp

Filesize
6.2MB

Download
memory/3972-147-0x0000000005DD0000-0x0000000005DEE000-memory.dmp

Filesize
120KB

Download
memory/3972-143-0x0000000002490000-0x00000000024C6000-memory.dmp

Filesize
216KB

Download
memory/3972-145-0x0000000004E30000-0x0000000004E52000-memory.dmp

Filesize
136KB

Download
memory/3972-158-0x00000000065A0000-0x00000000065BA000-memory.dmp

Filesize
104KB

Download
memory/3972-151-0x00000000063E0000-0x0000000006412000-memory.dmp

Filesize
200KB

Download
memory/3972-153-0x000000006F970000-0x000000006F9BC000-memory.dmp

Filesize
304KB

Download
memory/3972-157-0x0000000007820000-0x0000000007E9A000-memory.dmp

Filesize
6.5MB

Download
memory/3972-140-0x0000000000000000-mapping.dmp

Download
memory/3972-155-0x00000000063C0000-0x00000000063DE000-memory.dmp

Filesize
120KB

Download
memory/3996-159-0x0000000000000000-mapping.dmp

Download
memory/4372-161-0x0000000000000000-mapping.dmp

Download
memory/4372-163-0x0000000000CA0000-0x0000000001116000-memory.dmp

Filesize
4.5MB

Download
memory/4372-164-0x0000000000CA0000-0x0000000001116000-memory.dmp

Filesize
4.5MB

Download
memory/4464-142-0x0000000000CA0000-0x0000000001116000-memory.dmp

Filesize
4.5MB

Download
memory/4464-149-0x0000000007E90000-0x0000000007E9A000-memory.dmp

Filesize
40KB

Download
memory/4464-138-0x0000000000000000-mapping.dmp

Download
memory/4632-150-0x0000000000000000-mapping.dmp

Download
memory/4992-154-0x0000000000000000-mapping.dmp

Download