quasar | 815b2bf1ddadfb46a27001e08246e8f82f629eb793963bef856d17e1ef9c4085

Analysis

max time kernel
4294208s
max time network
151s
platform
windows7_x64
resource
win7-20220223-en
submitted
04/03/2022, 22:36

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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 6 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/memory/1752-54-0x0000000000BE0000-0x0000000000C6C000-memory.dmp	disable_win_def
behavioral1/files/0x000900000001235e-58.dat	disable_win_def
behavioral1/files/0x000900000001235e-59.dat	disable_win_def
behavioral1/files/0x000900000001235e-60.dat	disable_win_def
behavioral1/memory/1484-61-0x0000000000AD0000-0x0000000000B5C000-memory.dmp	disable_win_def
behavioral1/memory/876-72-0x0000000001140000-0x00000000011CC000-memory.dmp	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 6 IoCs

resource	yara_rule
behavioral1/memory/1752-54-0x0000000000BE0000-0x0000000000C6C000-memory.dmp	family_quasar
behavioral1/files/0x000900000001235e-58.dat	family_quasar
behavioral1/files/0x000900000001235e-59.dat	family_quasar
behavioral1/files/0x000900000001235e-60.dat	family_quasar
behavioral1/memory/1484-61-0x0000000000AD0000-0x0000000000B5C000-memory.dmp	family_quasar
behavioral1/memory/876-72-0x0000000001140000-0x00000000011CC000-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

Executes dropped EXE 1 IoCs

pid	Process
1484	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
1752	_-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
2	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
1164	schtasks.exe
2000	schtasks.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	_-Venom.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	_-Venom.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1324	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1516	powershell.exe
1752	_-Venom.exe
1752	_-Venom.exe
1752	_-Venom.exe
1752	_-Venom.exe
1752	_-Venom.exe
1752	_-Venom.exe
1752	_-Venom.exe
876	_-Venom.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1752	_-Venom.exe
Token: SeDebugPrivilege	1484	svchost.exe
Token: SeDebugPrivilege	1516	powershell.exe
Token: SeDebugPrivilege	1484	svchost.exe
Token: SeDebugPrivilege	876	_-Venom.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1484	svchost.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 1164	1752	_-Venom.exe	28
PID 1752 wrote to memory of 1164	1752	_-Venom.exe	28
PID 1752 wrote to memory of 1164	1752	_-Venom.exe	28
PID 1752 wrote to memory of 1164	1752	_-Venom.exe	28
PID 1752 wrote to memory of 1484	1752	_-Venom.exe	30
PID 1752 wrote to memory of 1484	1752	_-Venom.exe	30
PID 1752 wrote to memory of 1484	1752	_-Venom.exe	30
PID 1752 wrote to memory of 1484	1752	_-Venom.exe	30
PID 1752 wrote to memory of 1516	1752	_-Venom.exe	31
PID 1752 wrote to memory of 1516	1752	_-Venom.exe	31
PID 1752 wrote to memory of 1516	1752	_-Venom.exe	31
PID 1752 wrote to memory of 1516	1752	_-Venom.exe	31
PID 1484 wrote to memory of 2000	1484	svchost.exe	33
PID 1484 wrote to memory of 2000	1484	svchost.exe	33
PID 1484 wrote to memory of 2000	1484	svchost.exe	33
PID 1484 wrote to memory of 2000	1484	svchost.exe	33
PID 1752 wrote to memory of 2036	1752	_-Venom.exe	35
PID 1752 wrote to memory of 2036	1752	_-Venom.exe	35
PID 1752 wrote to memory of 2036	1752	_-Venom.exe	35
PID 1752 wrote to memory of 2036	1752	_-Venom.exe	35
PID 2036 wrote to memory of 1744	2036	cmd.exe	37
PID 2036 wrote to memory of 1744	2036	cmd.exe	37
PID 2036 wrote to memory of 1744	2036	cmd.exe	37
PID 2036 wrote to memory of 1744	2036	cmd.exe	37
PID 1752 wrote to memory of 1976	1752	_-Venom.exe	38
PID 1752 wrote to memory of 1976	1752	_-Venom.exe	38
PID 1752 wrote to memory of 1976	1752	_-Venom.exe	38
PID 1752 wrote to memory of 1976	1752	_-Venom.exe	38
PID 1976 wrote to memory of 1172	1976	cmd.exe	40
PID 1976 wrote to memory of 1172	1976	cmd.exe	40
PID 1976 wrote to memory of 1172	1976	cmd.exe	40
PID 1976 wrote to memory of 1172	1976	cmd.exe	40
PID 1976 wrote to memory of 1324	1976	cmd.exe	41
PID 1976 wrote to memory of 1324	1976	cmd.exe	41
PID 1976 wrote to memory of 1324	1976	cmd.exe	41
PID 1976 wrote to memory of 1324	1976	cmd.exe	41
PID 1976 wrote to memory of 876	1976	cmd.exe	42
PID 1976 wrote to memory of 876	1976	cmd.exe	42
PID 1976 wrote to memory of 876	1976	cmd.exe	42
PID 1976 wrote to memory of 876	1976	cmd.exe	42

C:\Users\Admin\AppData\Local\Temp\_-Venom.exe
"C:\Users\Admin\AppData\Local\Temp\_-Venom.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1752
- 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:1164
- 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:1484
- - 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:2000
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1516
- 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:2036
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1744
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\hW9xcsE8LMXZ.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1976
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1172
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1324
- - 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:876

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

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/876-74-0x0000000000F10000-0x0000000000F11000-memory.dmp

Filesize
4KB

Download
memory/876-73-0x0000000074AF0000-0x00000000751DE000-memory.dmp

Filesize
6.9MB

Download
memory/876-72-0x0000000001140000-0x00000000011CC000-memory.dmp

Filesize
560KB

Download
memory/1484-64-0x0000000074AF0000-0x00000000751DE000-memory.dmp

Filesize
6.9MB

Download
memory/1484-65-0x0000000004950000-0x0000000004951000-memory.dmp

Filesize
4KB

Download
memory/1484-61-0x0000000000AD0000-0x0000000000B5C000-memory.dmp

Filesize
560KB

Download
memory/1516-66-0x000000006F450000-0x000000006F9FB000-memory.dmp

Filesize
5.7MB

Download
memory/1516-67-0x000000006F450000-0x000000006F9FB000-memory.dmp

Filesize
5.7MB

Download
memory/1516-68-0x0000000001CE0000-0x0000000001D20000-memory.dmp

Filesize
256KB

Download
memory/1516-69-0x0000000001CE0000-0x0000000001D20000-memory.dmp

Filesize
256KB

Download
memory/1516-70-0x0000000001CE0000-0x0000000001D20000-memory.dmp

Filesize
256KB

Download
memory/1752-54-0x0000000000BE0000-0x0000000000C6C000-memory.dmp

Filesize
560KB

Download
memory/1752-57-0x00000000020E0000-0x00000000020E1000-memory.dmp

Filesize
4KB

Download
memory/1752-56-0x0000000074AF0000-0x00000000751DE000-memory.dmp

Filesize
6.9MB

Download
memory/1752-55-0x0000000076891000-0x0000000076893000-memory.dmp

Filesize
8KB

Download