quasar | f2d6e1e9007b693c4ef5b7a8ee56c4bf24594620a43c16d752fe79dc60132270

Analysis

max time kernel
506s
max time network
442s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
08-02-2024 02:27

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General

Target

$77-Venom.exe
Size

534KB
MD5

ac2e0dc8d409951c34e10105738c0819
SHA1

644f9ecf7dd774bcf0ebd551344866f3311b4ddb
SHA256

f2d6e1e9007b693c4ef5b7a8ee56c4bf24594620a43c16d752fe79dc60132270
SHA512

a0c2c24375db71dd7617f52c24824f760a80a9a2e77fe0f3bcc1518fbf0cefc11e41aa9af65231e9bb1d1d91a0653aefb1bb650e701922152fc8844f0b56535a
SSDEEP

12288:0kxfIayFM+jJ2vemr+mf7B+yVkzFBtFET:0wPyFMyEr+mFzyFs

Score

10^/10

quasar venomrat mariojudah evasion rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

mariojudah

127.0.0.1:4782

Mutex

VNM_MUTEX_a2Jk7sW9n0PjTmaEMn

Attributes

encryption_key
1zzvalSEUSRsWGZTAdB5
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Venom Client Startup
subdirectory
SubDir

Signatures

Contains code to disable Windows Defender 4 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/1392-0-0x0000000000B20000-0x0000000000BAC000-memory.dmp	disable_win_def
behavioral1/files/0x0009000000014b70-4.dat	disable_win_def
behavioral1/memory/2256-9-0x0000000000970000-0x00000000009FC000-memory.dmp	disable_win_def
behavioral1/memory/2220-89-0x0000000000250000-0x00000000002DC000-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:

$77-Venom.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	$77-Venom.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	$77-Venom.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	$77-Venom.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	$77-Venom.exe

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

Quasar payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1392-0-0x0000000000B20000-0x0000000000BAC000-memory.dmp	family_quasar
behavioral1/files/0x0009000000014b70-4.dat	family_quasar
behavioral1/memory/2256-9-0x0000000000970000-0x00000000009FC000-memory.dmp	family_quasar
behavioral1/memory/2220-89-0x0000000000250000-0x00000000002DC000-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 1 IoCs

Processes:

Client.exe

pid	Process
2256	Client.exe

Loads dropped DLL 1 IoCs

Processes:

$77-Venom.exe

pid	Process
1392	$77-Venom.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

$77-Venom.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	$77-Venom.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	$77-Venom.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

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
3028	schtasks.exe
1192	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
2056	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exe$77-Venom.exe$77-Venom.exe

pid	Process
2632	powershell.exe
1392	$77-Venom.exe
1392	$77-Venom.exe
1392	$77-Venom.exe
1392	$77-Venom.exe
1392	$77-Venom.exe
1392	$77-Venom.exe
1392	$77-Venom.exe
2220	$77-Venom.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

$77-Venom.exepowershell.exeClient.exe$77-Venom.exeAUDIODG.EXE

description	pid	Process
Token: SeDebugPrivilege	1392	$77-Venom.exe
Token: SeDebugPrivilege	2632	powershell.exe
Token: SeDebugPrivilege	2256	Client.exe
Token: SeDebugPrivilege	2256	Client.exe
Token: SeDebugPrivilege	2220	$77-Venom.exe
Token: 33	832	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	832	AUDIODG.EXE
Token: 33	832	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	832	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
2256	Client.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

$77-Venom.exeClient.execmd.execmd.exe

description	pid	Process	procid_target
PID 1392 wrote to memory of 3028	1392	$77-Venom.exe	29
PID 1392 wrote to memory of 3028	1392	$77-Venom.exe	29
PID 1392 wrote to memory of 3028	1392	$77-Venom.exe	29
PID 1392 wrote to memory of 3028	1392	$77-Venom.exe	29
PID 1392 wrote to memory of 2256	1392	$77-Venom.exe	31
PID 1392 wrote to memory of 2256	1392	$77-Venom.exe	31
PID 1392 wrote to memory of 2256	1392	$77-Venom.exe	31
PID 1392 wrote to memory of 2256	1392	$77-Venom.exe	31
PID 1392 wrote to memory of 2632	1392	$77-Venom.exe	32
PID 1392 wrote to memory of 2632	1392	$77-Venom.exe	32
PID 1392 wrote to memory of 2632	1392	$77-Venom.exe	32
PID 1392 wrote to memory of 2632	1392	$77-Venom.exe	32
PID 2256 wrote to memory of 1192	2256	Client.exe	35
PID 2256 wrote to memory of 1192	2256	Client.exe	35
PID 2256 wrote to memory of 1192	2256	Client.exe	35
PID 2256 wrote to memory of 1192	2256	Client.exe	35
PID 1392 wrote to memory of 2824	1392	$77-Venom.exe	36
PID 1392 wrote to memory of 2824	1392	$77-Venom.exe	36
PID 1392 wrote to memory of 2824	1392	$77-Venom.exe	36
PID 1392 wrote to memory of 2824	1392	$77-Venom.exe	36
PID 2824 wrote to memory of 2752	2824	cmd.exe	38
PID 2824 wrote to memory of 2752	2824	cmd.exe	38
PID 2824 wrote to memory of 2752	2824	cmd.exe	38
PID 2824 wrote to memory of 2752	2824	cmd.exe	38
PID 1392 wrote to memory of 756	1392	$77-Venom.exe	39
PID 1392 wrote to memory of 756	1392	$77-Venom.exe	39
PID 1392 wrote to memory of 756	1392	$77-Venom.exe	39
PID 1392 wrote to memory of 756	1392	$77-Venom.exe	39
PID 756 wrote to memory of 848	756	cmd.exe	41
PID 756 wrote to memory of 848	756	cmd.exe	41
PID 756 wrote to memory of 848	756	cmd.exe	41
PID 756 wrote to memory of 848	756	cmd.exe	41
PID 756 wrote to memory of 2056	756	cmd.exe	42
PID 756 wrote to memory of 2056	756	cmd.exe	42
PID 756 wrote to memory of 2056	756	cmd.exe	42
PID 756 wrote to memory of 2056	756	cmd.exe	42
PID 756 wrote to memory of 2220	756	cmd.exe	43
PID 756 wrote to memory of 2220	756	cmd.exe	43
PID 756 wrote to memory of 2220	756	cmd.exe	43
PID 756 wrote to memory of 2220	756	cmd.exe	43

C:\Users\Admin\AppData\Local\Temp\$77-Venom.exe
"C:\Users\Admin\AppData\Local\Temp\$77-Venom.exe"
1⤵
- 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:1392
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\$77-Venom.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3028
- 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:2256
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1192
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2632
- 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:2824
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:2752
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\DojabuDuWTYs.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:756
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:848
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:2056
- - C:\Users\Admin\AppData\Local\Temp\$77-Venom.exe
    "C:\Users\Admin\AppData\Local\Temp\$77-Venom.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2220

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2920

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x550
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Scheduled Task/Job

T1053

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

Filesize
1KB

MD5
a266bb7dcc38a562631361bbf61dd11b

SHA1
3b1efd3a66ea28b16697394703a72ca340a05bd5

SHA256
df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

SHA512
0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

Filesize
242B

MD5
020e0bce2e402dd1dc02d6ebc4ca52e3

SHA1
ecb25005189dfb0cfb17636d3c4588e6ab2c341c

SHA256
a6b2efd2f41aaee26421709dfa488892f7e71f71eb7fa4e9dc35b8ab12f60268

SHA512
4c694a462968390dbe67d6bdd4fc87e312b4dbba8f81d7de6f162facc523d67532ff60e7e0e83211bfd971c7a870d173498d354272eae17f3be067dd87cbf1ea

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

Filesize
206B

MD5
fdd26239c7e395552fa0e38733e08ebc

SHA1
9e1424212b748c98bfc6af0dc534faa12a4519d7

SHA256
f4da4742cbb7344a466082377808f6a69bfe2160ab05fc0d6cd571f5d75f6f6d

SHA512
959181835fc85e22476ffa862170599d89328880dd56444459e82aa7c6b65a9a464ef0f1fdb1be7b25531e5fe955a203a216b360c415321edbdcedb0e9e34f53

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar2773.tmp

Filesize
171KB

MD5
9c0c641c06238516f27941aa1166d427

SHA1
64cd549fb8cf014fcd9312aa7a5b023847b6c977

SHA256
4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

SHA512
936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

Download Submit
\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
534KB

MD5
ac2e0dc8d409951c34e10105738c0819

SHA1
644f9ecf7dd774bcf0ebd551344866f3311b4ddb

SHA256
f2d6e1e9007b693c4ef5b7a8ee56c4bf24594620a43c16d752fe79dc60132270

SHA512
a0c2c24375db71dd7617f52c24824f760a80a9a2e77fe0f3bcc1518fbf0cefc11e41aa9af65231e9bb1d1d91a0653aefb1bb650e701922152fc8844f0b56535a

Download Submit
memory/1392-88-0x00000000749F0000-0x00000000750DE000-memory.dmp

Filesize
6.9MB

Download
memory/1392-0-0x0000000000B20000-0x0000000000BAC000-memory.dmp

Filesize
560KB

Download
memory/1392-2-0x00000000049C0000-0x0000000004A00000-memory.dmp

Filesize
256KB

Download
memory/1392-1-0x00000000749F0000-0x00000000750DE000-memory.dmp

Filesize
6.9MB

Download
memory/2220-90-0x00000000749F0000-0x00000000750DE000-memory.dmp

Filesize
6.9MB

Download
memory/2220-89-0x0000000000250000-0x00000000002DC000-memory.dmp

Filesize
560KB

Download
memory/2220-93-0x00000000749F0000-0x00000000750DE000-memory.dmp

Filesize
6.9MB

Download
memory/2220-94-0x0000000004AF0000-0x0000000004B30000-memory.dmp

Filesize
256KB

Download
memory/2256-10-0x00000000749F0000-0x00000000750DE000-memory.dmp

Filesize
6.9MB

Download
memory/2256-91-0x00000000749F0000-0x00000000750DE000-memory.dmp

Filesize
6.9MB

Download
memory/2256-92-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download
memory/2256-11-0x0000000004AE0000-0x0000000004B20000-memory.dmp

Filesize
256KB

Download
memory/2256-9-0x0000000000970000-0x00000000009FC000-memory.dmp

Filesize
560KB

Download
memory/2632-17-0x000000006F150000-0x000000006F6FB000-memory.dmp

Filesize
5.7MB

Download
memory/2632-16-0x000000006F150000-0x000000006F6FB000-memory.dmp

Filesize
5.7MB

Download
memory/2632-15-0x0000000002CB0000-0x0000000002CF0000-memory.dmp

Filesize
256KB

Download
memory/2632-14-0x000000006F150000-0x000000006F6FB000-memory.dmp

Filesize
5.7MB

Download