quasar | e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd

General

Target

e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe
Size

504KB
MD5

df648c75bae0fb216d8ce2b93c84aee2
SHA1

f8728cff892fbfd292e3f52a23854204066adea4
SHA256

e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd
SHA512

b813f0973194ed82b596e2b573a48864faf77e83ff1ed07d9ab38b5a879308f0e09335ea225c7fa9f64fab83b9c0878d5a9208e333a40012893f7d76c8b7c249

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.

Processes:

resource	yara_rule
behavioral2/files/0x00060000000231e5-132.dat	disable_win_def
behavioral2/files/0x00060000000231e5-133.dat	disable_win_def
behavioral2/memory/3736-134-0x00000000008E0000-0x000000000096C000-memory.dmp	disable_win_def

Quasar Payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/files/0x00060000000231e5-132.dat	family_quasar
behavioral2/files/0x00060000000231e5-133.dat	family_quasar
behavioral2/memory/3736-134-0x00000000008E0000-0x000000000096C000-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

Processes:

$77-Venom.exe

pid	Process
3736	$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

Processes:

e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.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
51	ip-api.com

Drops file in Windows directory 3 IoCs

Processes:

e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe

description	ioc	Process
File opened for modification	C:\Windows\assembly	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe
File created	C:\Windows\assembly\Desktop.ini	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.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

Processes:

WINWORD.EXE

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

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

Processes:

e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000_Classes\Local Settings	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid	Process
4504	WINWORD.EXE
4504	WINWORD.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

$77-Venom.exe

description	pid	Process
Token: SeDebugPrivilege	3736	$77-Venom.exe
Token: SeDebugPrivilege	3736	$77-Venom.exe

Suspicious use of SetWindowsHookEx 8 IoCs

Processes:

WINWORD.EXE

pid	Process
4504	WINWORD.EXE
4504	WINWORD.EXE
4504	WINWORD.EXE
4504	WINWORD.EXE
4504	WINWORD.EXE
4504	WINWORD.EXE
4504	WINWORD.EXE
4504	WINWORD.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe

description	pid	Process	procid_target
PID 1420 wrote to memory of 3736	1420	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe	83
PID 1420 wrote to memory of 3736	1420	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe	83
PID 1420 wrote to memory of 3736	1420	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe	83
PID 1420 wrote to memory of 4504	1420	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe	84
PID 1420 wrote to memory of 4504	1420	e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe	84

C:\Users\Admin\AppData\Local\Temp\e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe
"C:\Users\Admin\AppData\Local\Temp\e39ab5bca5cebce3ca9ed90beb1cc9ec94b373bc895d5b961a0138e87d4086fd.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1420
- 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:3736
- 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:4504

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/1420-130-0x0000000075480000-0x0000000075A31000-memory.dmp

Filesize
5.7MB

Download
memory/3736-144-0x0000000006000000-0x0000000006012000-memory.dmp

Filesize
72KB

Download
memory/3736-131-0x0000000000000000-mapping.dmp

Download
memory/3736-134-0x00000000008E0000-0x000000000096C000-memory.dmp

Filesize
560KB

Download
memory/3736-135-0x0000000005720000-0x0000000005CC4000-memory.dmp

Filesize
5.6MB

Download
memory/3736-137-0x0000000005280000-0x0000000005312000-memory.dmp

Filesize
584KB

Download
memory/3736-138-0x00000000051F0000-0x0000000005256000-memory.dmp

Filesize
408KB

Download
memory/3736-147-0x0000000006730000-0x000000000673A000-memory.dmp

Filesize
40KB

Download
memory/3736-145-0x0000000006430000-0x000000000646C000-memory.dmp

Filesize
240KB

Download
memory/4504-136-0x0000000000000000-mapping.dmp

Download
memory/4504-143-0x00007FF854B30000-0x00007FF854B40000-memory.dmp

Filesize
64KB

Download
memory/4504-142-0x00007FF854B30000-0x00007FF854B40000-memory.dmp

Filesize
64KB

Download
memory/4504-141-0x00007FF854B30000-0x00007FF854B40000-memory.dmp

Filesize
64KB

Download
memory/4504-146-0x00007FF852740000-0x00007FF852750000-memory.dmp

Filesize
64KB

Download
memory/4504-140-0x00007FF854B30000-0x00007FF854B40000-memory.dmp

Filesize
64KB

Download
memory/4504-148-0x00007FF852740000-0x00007FF852750000-memory.dmp

Filesize
64KB

Download
memory/4504-139-0x00007FF854B30000-0x00007FF854B40000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads