quasar | 6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766

General

Target

6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe
Size

472KB
MD5

3a7117d0c950b44d5464cd6841dd95cd
SHA1

b0dd2745f822d1e43300fa1ccb11749fdfcf1260
SHA256

6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766
SHA512

a8c3ce748eee0ef88ce737d853d26d3f9e49bb7cfbbf7c67dfebfa7451279010f67c552f3f49275788db21f423ebfa845f2726892bdc2596af36682b7791ab25

Score

10^/10

quasar venomrat svhost rat rootkit spyware stealer suricata trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

svhost

C2

myconect.ddns.net:6606

Mutex

VNM_MUTEX_ND6PULLW5ZVLwo1nwR

Attributes

encryption_key
yaa63tXY4j55os5llHHd
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Venom Client Startup
subdirectory
SubDir

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
behavioral2/files/0x00070000000231d6-132.dat	disable_win_def
behavioral2/files/0x00070000000231d6-133.dat	disable_win_def
behavioral2/memory/4072-135-0x0000000000780000-0x000000000080C000-memory.dmp	disable_win_def

Quasar Payload 3 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231d6-132.dat	family_quasar
behavioral2/files/0x00070000000231d6-133.dat	family_quasar
behavioral2/memory/4072-135-0x0000000000780000-0x000000000080C000-memory.dmp	family_quasar

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 1 IoCs

pid	Process
4072	$77-Venom.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.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
7	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

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeRestorePrivilege	1768	dw20.exe
Token: SeBackupPrivilege	1768	dw20.exe
Token: SeBackupPrivilege	1768	dw20.exe
Token: SeBackupPrivilege	1768	dw20.exe
Token: SeDebugPrivilege	4072	$77-Venom.exe
Token: SeDebugPrivilege	4072	$77-Venom.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2804 wrote to memory of 4072	2804	6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe	81
PID 2804 wrote to memory of 4072	2804	6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe	81
PID 2804 wrote to memory of 4072	2804	6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe	81
PID 2804 wrote to memory of 1768	2804	6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe	82
PID 2804 wrote to memory of 1768	2804	6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe	82
PID 2804 wrote to memory of 1768	2804	6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe	82

C:\Users\Admin\AppData\Local\Temp\6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe
"C:\Users\Admin\AppData\Local\Temp\6a1e31b04adc8e779095fb61f7e3cafc8866f644865ee64ee1d02210f7db3766.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2804
- C:\Users\Admin\AppData\Roaming\$77-Venom.exe
  "C:\Users\Admin\AppData\Roaming\$77-Venom.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4072
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
  dw20.exe -x -s 1096
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:1768

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\$77-Venom.exe

Filesize
534KB

MD5
84c1dc6b428904cc2a6746653849df0f

SHA1
5cce4078427481f4d7456b5a4f3930ae6e706fb4

SHA256
bc24e3c5408fea0b6f9aa0deb56a4636a8d0b9a6054ff1033efa6ccfe04ba44a

SHA512
3b7a7607c3409b5ded563f2e1fcc0fa489c4465ab764d14a647b474968a025a95fa8ceb549fc70482b7b1dd935f66a41ada7b4910059786aafc870c5847a9245

Download Submit
C:\Users\Admin\AppData\Roaming\$77-Venom.exe

Filesize
534KB

MD5
84c1dc6b428904cc2a6746653849df0f

SHA1
5cce4078427481f4d7456b5a4f3930ae6e706fb4

SHA256
bc24e3c5408fea0b6f9aa0deb56a4636a8d0b9a6054ff1033efa6ccfe04ba44a

SHA512
3b7a7607c3409b5ded563f2e1fcc0fa489c4465ab764d14a647b474968a025a95fa8ceb549fc70482b7b1dd935f66a41ada7b4910059786aafc870c5847a9245

Download Submit
memory/2804-130-0x00000000752D0000-0x0000000075881000-memory.dmp

Filesize
5.7MB

Download
memory/4072-135-0x0000000000780000-0x000000000080C000-memory.dmp

Filesize
560KB

Download
memory/4072-136-0x0000000005820000-0x0000000005DC4000-memory.dmp

Filesize
5.6MB

Download
memory/4072-137-0x00000000050D0000-0x0000000005162000-memory.dmp

Filesize
584KB

Download
memory/4072-138-0x0000000005170000-0x00000000051D6000-memory.dmp

Filesize
408KB

Download
memory/4072-139-0x00000000057F0000-0x0000000005802000-memory.dmp

Filesize
72KB

Download
memory/4072-140-0x00000000064D0000-0x000000000650C000-memory.dmp

Filesize
240KB

Download
memory/4072-141-0x0000000006690000-0x000000000669A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads