quasar | 815b2bf1ddadfb46a27001e08246e8f82f629eb793963bef856d17e1ef9c4085

Analysis

max time kernel
145s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
04/03/2022, 22:36

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General

Target

_-Venom.exe
Size

534KB
MD5

56b18f02883a486cbb4c826028ecfe11
SHA1

3e9a496bc38f73910cbd3d5576ec22d9b804a8dd
SHA256

815b2bf1ddadfb46a27001e08246e8f82f629eb793963bef856d17e1ef9c4085
SHA512

b507414c3d429d0d38dfffe2a5a3ec174012087790dd6c9ce86d16c402e68cc15788a1ec7c6baa8a3fc6f71c8a5695ef155288abc216660f9d5c54df5a75ad35

Score

10^/10

quasar venomrat host _s evasion rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

HOST _S

44334333-31579.portmap.io:31579

Mutex

VNM_MUTEX_yC484ajmODj5OJv3Dx

Attributes

encryption_key
psSc86jtY2yoNlEhs1Dp
install_name
svchost.exe
log_directory
liblogsconfig
reconnect_delay
3000
startup_key
Java Update jdk
subdirectory
svchost

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/memory/3132-131-0x0000000000FC0000-0x000000000104C000-memory.dmp	disable_win_def
behavioral2/files/0x000300000001e533-138.dat	disable_win_def
behavioral2/files/0x000300000001e533-139.dat	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

Quasar Payload 3 IoCs

resource	yara_rule
behavioral2/memory/3132-131-0x0000000000FC0000-0x000000000104C000-memory.dmp	family_quasar
behavioral2/files/0x000300000001e533-138.dat	family_quasar
behavioral2/files/0x000300000001e533-139.dat	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

Executes dropped EXE 1 IoCs

pid	Process
4028	svchost.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-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	_-Venom.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	_-Venom.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	_-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.

flow	ioc
22	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

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

T1053

pid	Process
2916	schtasks.exe
3296	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3140	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1280	powershell.exe
1280	powershell.exe
3132	_-Venom.exe
3132	_-Venom.exe
3132	_-Venom.exe
3132	_-Venom.exe
3132	_-Venom.exe
3132	_-Venom.exe
3132	_-Venom.exe
3112	_-Venom.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3132	_-Venom.exe
Token: SeDebugPrivilege	1280	powershell.exe
Token: SeDebugPrivilege	4028	svchost.exe
Token: SeDebugPrivilege	4028	svchost.exe
Token: SeDebugPrivilege	3112	_-Venom.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4028	svchost.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 2916	3132	_-Venom.exe	61
PID 3132 wrote to memory of 2916	3132	_-Venom.exe	61
PID 3132 wrote to memory of 2916	3132	_-Venom.exe	61
PID 3132 wrote to memory of 4028	3132	_-Venom.exe	63
PID 3132 wrote to memory of 4028	3132	_-Venom.exe	63
PID 3132 wrote to memory of 4028	3132	_-Venom.exe	63
PID 3132 wrote to memory of 1280	3132	_-Venom.exe	64
PID 3132 wrote to memory of 1280	3132	_-Venom.exe	64
PID 3132 wrote to memory of 1280	3132	_-Venom.exe	64
PID 4028 wrote to memory of 3296	4028	svchost.exe	66
PID 4028 wrote to memory of 3296	4028	svchost.exe	66
PID 4028 wrote to memory of 3296	4028	svchost.exe	66
PID 3132 wrote to memory of 1492	3132	_-Venom.exe	70
PID 3132 wrote to memory of 1492	3132	_-Venom.exe	70
PID 3132 wrote to memory of 1492	3132	_-Venom.exe	70
PID 1492 wrote to memory of 3452	1492	cmd.exe	72
PID 1492 wrote to memory of 3452	1492	cmd.exe	72
PID 1492 wrote to memory of 3452	1492	cmd.exe	72
PID 3132 wrote to memory of 3384	3132	_-Venom.exe	74
PID 3132 wrote to memory of 3384	3132	_-Venom.exe	74
PID 3132 wrote to memory of 3384	3132	_-Venom.exe	74
PID 3384 wrote to memory of 2980	3384	cmd.exe	76
PID 3384 wrote to memory of 2980	3384	cmd.exe	76
PID 3384 wrote to memory of 2980	3384	cmd.exe	76
PID 3384 wrote to memory of 3140	3384	cmd.exe	77
PID 3384 wrote to memory of 3140	3384	cmd.exe	77
PID 3384 wrote to memory of 3140	3384	cmd.exe	77
PID 3384 wrote to memory of 3112	3384	cmd.exe	78
PID 3384 wrote to memory of 3112	3384	cmd.exe	78
PID 3384 wrote to memory of 3112	3384	cmd.exe	78

C:\Users\Admin\AppData\Local\Temp\_-Venom.exe
"C:\Users\Admin\AppData\Local\Temp\_-Venom.exe"
1⤵
- Checks computer location settings
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3132
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Java Update jdk" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\_-Venom.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2916
- C:\Users\Admin\AppData\Roaming\svchost\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4028
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Java Update jdk" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\svchost\svchost.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:3296
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1280
- 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:1492
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:3452
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\60i6RhPY6zOV.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3384
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:2980
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:3140
- - C:\Users\Admin\AppData\Local\Temp\_-Venom.exe
    "C:\Users\Admin\AppData\Local\Temp\_-Venom.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3112

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1280-150-0x0000000007C60000-0x0000000007C7E000-memory.dmp

Filesize
120KB

Download
memory/1280-152-0x0000000008230000-0x0000000008262000-memory.dmp

Filesize
200KB

Download
memory/1280-163-0x0000000009280000-0x0000000009288000-memory.dmp

Filesize
32KB

Download
memory/1280-162-0x00000000092A0000-0x00000000092BA000-memory.dmp

Filesize
104KB

Download
memory/1280-161-0x0000000009190000-0x000000000919E000-memory.dmp

Filesize
56KB

Download
memory/1280-160-0x00000000091E0000-0x0000000009276000-memory.dmp

Filesize
600KB

Download
memory/1280-142-0x0000000004330000-0x0000000004366000-memory.dmp

Filesize
216KB

Download
memory/1280-143-0x0000000006E90000-0x00000000074B8000-memory.dmp

Filesize
6.2MB

Download
memory/1280-159-0x0000000008FD0000-0x0000000008FDA000-memory.dmp

Filesize
40KB

Download
memory/1280-145-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/1280-147-0x00000000043B2000-0x00000000043B3000-memory.dmp

Filesize
4KB

Download
memory/1280-146-0x00000000043B0000-0x00000000043B1000-memory.dmp

Filesize
4KB

Download
memory/1280-148-0x00000000074F0000-0x0000000007512000-memory.dmp

Filesize
136KB

Download
memory/1280-149-0x00000000075A0000-0x0000000007606000-memory.dmp

Filesize
408KB

Download
memory/1280-157-0x00000000095A0000-0x0000000009C1A000-memory.dmp

Filesize
6.5MB

Download
memory/1280-156-0x000000007FAC0000-0x000000007FAC1000-memory.dmp

Filesize
4KB

Download
memory/1280-158-0x0000000008F60000-0x0000000008F7A000-memory.dmp

Filesize
104KB

Download
memory/1280-153-0x000000006FD90000-0x000000006FDDC000-memory.dmp

Filesize
304KB

Download
memory/1280-154-0x0000000008210000-0x000000000822E000-memory.dmp

Filesize
120KB

Download
memory/1280-155-0x00000000043B5000-0x00000000043B7000-memory.dmp

Filesize
8KB

Download
memory/3112-168-0x0000000002AA0000-0x0000000002AA1000-memory.dmp

Filesize
4KB

Download
memory/3112-167-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/3132-130-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/3132-135-0x0000000005A30000-0x0000000005A96000-memory.dmp

Filesize
408KB

Download
memory/3132-133-0x0000000005B00000-0x0000000005B92000-memory.dmp

Filesize
584KB

Download
memory/3132-134-0x0000000005A20000-0x0000000005A21000-memory.dmp

Filesize
4KB

Download
memory/3132-137-0x0000000006E60000-0x0000000006E9C000-memory.dmp

Filesize
240KB

Download
memory/3132-136-0x0000000006A40000-0x0000000006A52000-memory.dmp

Filesize
72KB

Download
memory/3132-132-0x00000000060B0000-0x0000000006654000-memory.dmp

Filesize
5.6MB

Download
memory/3132-131-0x0000000000FC0000-0x000000000104C000-memory.dmp

Filesize
560KB

Download
memory/4028-144-0x0000000074990000-0x0000000075140000-memory.dmp

Filesize
7.7MB

Download
memory/4028-151-0x0000000007400000-0x000000000740A000-memory.dmp

Filesize
40KB

Download