quasar | f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a

General

Target

f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe
Size

709KB
MD5

dbdca8a3ffa33284e03a1a7bd57e12ad
SHA1

facc92651a792c4c8abe606ca47424b4f042224b
SHA256

f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a
SHA512

727cd27bfb0ffc7a9f76fd02417de92a34ef4a1ed341953b1f5c6f78f851c83d5de390d3168df89367196a3de25eb370be1c3867affc94ae6520dff22d36bd94

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/0x0006000000022eae-132.dat	disable_win_def
behavioral2/files/0x0006000000022eae-133.dat	disable_win_def
behavioral2/memory/4260-135-0x0000000000910000-0x000000000099C000-memory.dmp	disable_win_def

Quasar Payload 3 IoCs

resource	yara_rule
behavioral2/files/0x0006000000022eae-132.dat	family_quasar
behavioral2/files/0x0006000000022eae-133.dat	family_quasar
behavioral2/memory/4260-135-0x0000000000910000-0x000000000099C000-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
4260	$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	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.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
30	ip-api.com

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe
File created	C:\Windows\assembly\Desktop.ini	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.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 opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	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	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
488	WINWORD.EXE
488	WINWORD.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4260	$77-Venom.exe
Token: SeDebugPrivilege	4260	$77-Venom.exe
Token: SeManageVolumePrivilege	3796	svchost.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
488	WINWORD.EXE
488	WINWORD.EXE
488	WINWORD.EXE
488	WINWORD.EXE
488	WINWORD.EXE
488	WINWORD.EXE
488	WINWORD.EXE
488	WINWORD.EXE

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4508 wrote to memory of 4260	4508	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe	84
PID 4508 wrote to memory of 4260	4508	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe	84
PID 4508 wrote to memory of 4260	4508	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe	84
PID 4508 wrote to memory of 488	4508	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe	85
PID 4508 wrote to memory of 488	4508	f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe	85

C:\Users\Admin\AppData\Local\Temp\f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe
"C:\Users\Admin\AppData\Local\Temp\f1f367c2bd3c1bc93a4c4a3081a3aa1072eb7a50d13927e3b5bc03c310248d3a.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4508
- 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:4260
- 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:488

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k appmodel -p -s camsvc
1⤵
PID:4056

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
1⤵
PID:2832

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k UnistackSvcGroup
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3796

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/488-142-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-140-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-152-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-145-0x00007FFE35080000-0x00007FFE35090000-memory.dmp

Filesize
64KB

Download
memory/488-154-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-138-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-139-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-151-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-141-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-153-0x00007FFE379B0000-0x00007FFE379C0000-memory.dmp

Filesize
64KB

Download
memory/488-143-0x00007FFE35080000-0x00007FFE35090000-memory.dmp

Filesize
64KB

Download
memory/3796-155-0x00000151CDA40000-0x00000151CDA50000-memory.dmp

Filesize
64KB

Download
memory/3796-156-0x00000151CDB40000-0x00000151CDB50000-memory.dmp

Filesize
64KB

Download
memory/4260-144-0x0000000005620000-0x0000000005686000-memory.dmp

Filesize
408KB

Download
memory/4260-149-0x0000000006960000-0x000000000696A000-memory.dmp

Filesize
40KB

Download
memory/4260-147-0x0000000006660000-0x000000000669C000-memory.dmp

Filesize
240KB

Download
memory/4260-146-0x0000000006230000-0x0000000006242000-memory.dmp

Filesize
72KB

Download
memory/4260-137-0x0000000005230000-0x00000000052C2000-memory.dmp

Filesize
584KB

Download
memory/4260-136-0x00000000058D0000-0x0000000005E74000-memory.dmp

Filesize
5.6MB

Download
memory/4260-135-0x0000000000910000-0x000000000099C000-memory.dmp

Filesize
560KB

Download
memory/4508-130-0x0000000074F30000-0x00000000754E1000-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