quasar | e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73

General

Target

e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe
Size

491KB
MD5

61052c513ec73fe0fe0cefe1f5a8d588
SHA1

ec74c81f9ac11a02987788c3f5ae21c7702367cb
SHA256

e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73
SHA512

83e5b267dcb6ee461ce284150be7db62f7c9012d66336206c4ae30ec9a6d8bbe73c25927ca6491da1322ae7dade5a1e67253b1025abd58df8afed1fc40614a74

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/0x0006000000022ef0-132.dat	disable_win_def
behavioral2/files/0x0006000000022ef0-133.dat	disable_win_def
behavioral2/memory/2856-135-0x00000000004D0000-0x000000000055C000-memory.dmp	disable_win_def

Quasar Payload 3 IoCs

resource	yara_rule
behavioral2/files/0x0006000000022ef0-132.dat	family_quasar
behavioral2/files/0x0006000000022ef0-133.dat	family_quasar
behavioral2/memory/2856-135-0x00000000004D0000-0x000000000055C000-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
2856	$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-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.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
26	ip-api.com

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe

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	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000_Classes\Local Settings	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
4256	WINWORD.EXE
4256	WINWORD.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2856	$77-Venom.exe
Token: SeDebugPrivilege	2856	$77-Venom.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
4256	WINWORD.EXE
4256	WINWORD.EXE
4256	WINWORD.EXE
4256	WINWORD.EXE
4256	WINWORD.EXE
4256	WINWORD.EXE
4256	WINWORD.EXE
4256	WINWORD.EXE

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5080 wrote to memory of 2856	5080	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe	83
PID 5080 wrote to memory of 2856	5080	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe	83
PID 5080 wrote to memory of 2856	5080	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe	83
PID 5080 wrote to memory of 4256	5080	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe	84
PID 5080 wrote to memory of 4256	5080	e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe	84

C:\Users\Admin\AppData\Local\Temp\e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe
"C:\Users\Admin\AppData\Local\Temp\e74ca6236680178ea85d3dec5335bf054d5004d7810683cb1233f67ca3894c73.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:5080
- 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:2856
- C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
  "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Roaming\null (2).docx" /o ""
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:4256

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
C:\Users\Admin\AppData\Roaming\null (2).docx

Filesize
2KB

MD5
b73ace90e3fbada0e8baa0d47b2cbd6f

SHA1
2147bfa5d92cb0c3fd296e7c90befa08564240a6

SHA256
94f271283b679ee024724d1aee0f4ead90ce56fb67813b5e0cbc082091fbe364

SHA512
d1a9d73fca25a73782bd0170937225afdb402a354a7fb6ea308114e276aed7f77ef211c458dd03292d2e90cd1d61976340396540ac410d452bda363f6d2ee157

Download Submit
memory/2856-136-0x0000000005500000-0x0000000005AA4000-memory.dmp

Filesize
5.6MB

Download
memory/2856-143-0x0000000005390000-0x00000000053F6000-memory.dmp

Filesize
408KB

Download
memory/2856-149-0x0000000006660000-0x000000000666A000-memory.dmp

Filesize
40KB

Download
memory/2856-137-0x0000000004FF0000-0x0000000005082000-memory.dmp

Filesize
584KB

Download
memory/2856-147-0x0000000006360000-0x000000000639C000-memory.dmp

Filesize
240KB

Download
memory/2856-135-0x00000000004D0000-0x000000000055C000-memory.dmp

Filesize
560KB

Download
memory/2856-145-0x0000000005F30000-0x0000000005F42000-memory.dmp

Filesize
72KB

Download
memory/4256-139-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/4256-142-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/4256-141-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/4256-144-0x00007FFB58B30000-0x00007FFB58B40000-memory.dmp

Filesize
64KB

Download
memory/4256-140-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/4256-146-0x00007FFB58B30000-0x00007FFB58B40000-memory.dmp

Filesize
64KB

Download
memory/4256-138-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/4256-151-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/4256-152-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/4256-153-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/4256-154-0x00007FFB5AB90000-0x00007FFB5ABA0000-memory.dmp

Filesize
64KB

Download
memory/5080-130-0x00000000746C0000-0x0000000074C71000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads