venomrat | b126d2bf73da9bce2f1a0748febb99510127eee852284a75c777ebac33b39649

Analysis

max time kernel
147s
max time network
146s
platform
windows7_x64
resource
win7
submitted
25-10-2020 20:03

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General

Target

8920c6867df1eeaec33e3e6253524700.exe
Size

534KB
MD5

8920c6867df1eeaec33e3e6253524700
SHA1

4ce786281b76b6949166092faa9bfccee4e2c599
SHA256

b126d2bf73da9bce2f1a0748febb99510127eee852284a75c777ebac33b39649
SHA512

fec621690ca21fc62a46c6b285a0bad0d6f3e4c792997616216b227b5a01db78b1b769c4847f3b6d0bc70d95f12b73885156b3164f319cda5d44b34861ef12e2

Score

10^/10

rat rootkit stealer venomrat evasion trojan spyware quasar

Malware Config

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
behavioral1/files/0x00050000000130f4-4.dat	disable_win_def
behavioral1/files/0x00050000000130f4-6.dat	disable_win_def
behavioral1/files/0x00050000000130f4-7.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 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

Processes:

Client.exe

pid	Process
308	Client.exe

Loads dropped DLL 1 IoCs

Processes:

8920c6867df1eeaec33e3e6253524700.exe

pid	Process
108	8920c6867df1eeaec33e3e6253524700.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

8920c6867df1eeaec33e3e6253524700.exe

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	8920c6867df1eeaec33e3e6253524700.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	8920c6867df1eeaec33e3e6253524700.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
4	ip-api.com

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

Processes:

schtasks.exeschtasks.exe

pid	Process
1996	schtasks.exe
864	schtasks.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

8920c6867df1eeaec33e3e6253524700.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	8920c6867df1eeaec33e3e6253524700.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	8920c6867df1eeaec33e3e6253524700.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
840	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exe8920c6867df1eeaec33e3e6253524700.exe8920c6867df1eeaec33e3e6253524700.exe

pid	Process
1236	powershell.exe
1236	powershell.exe
108	8920c6867df1eeaec33e3e6253524700.exe
108	8920c6867df1eeaec33e3e6253524700.exe
108	8920c6867df1eeaec33e3e6253524700.exe
108	8920c6867df1eeaec33e3e6253524700.exe
108	8920c6867df1eeaec33e3e6253524700.exe
108	8920c6867df1eeaec33e3e6253524700.exe
108	8920c6867df1eeaec33e3e6253524700.exe
1356	8920c6867df1eeaec33e3e6253524700.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

8920c6867df1eeaec33e3e6253524700.exepowershell.exeClient.exe8920c6867df1eeaec33e3e6253524700.exe

description	pid	Process
Token: SeDebugPrivilege	108	8920c6867df1eeaec33e3e6253524700.exe
Token: SeDebugPrivilege	1236	powershell.exe
Token: SeDebugPrivilege	308	Client.exe
Token: SeDebugPrivilege	308	Client.exe
Token: SeDebugPrivilege	1356	8920c6867df1eeaec33e3e6253524700.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
308	Client.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

8920c6867df1eeaec33e3e6253524700.exeClient.execmd.execmd.exe

description	pid	Process	procid_target
PID 108 wrote to memory of 1996	108	8920c6867df1eeaec33e3e6253524700.exe	29
PID 108 wrote to memory of 1996	108	8920c6867df1eeaec33e3e6253524700.exe	29
PID 108 wrote to memory of 1996	108	8920c6867df1eeaec33e3e6253524700.exe	29
PID 108 wrote to memory of 1996	108	8920c6867df1eeaec33e3e6253524700.exe	29
PID 108 wrote to memory of 308	108	8920c6867df1eeaec33e3e6253524700.exe	31
PID 108 wrote to memory of 308	108	8920c6867df1eeaec33e3e6253524700.exe	31
PID 108 wrote to memory of 308	108	8920c6867df1eeaec33e3e6253524700.exe	31
PID 108 wrote to memory of 308	108	8920c6867df1eeaec33e3e6253524700.exe	31
PID 108 wrote to memory of 1236	108	8920c6867df1eeaec33e3e6253524700.exe	32
PID 108 wrote to memory of 1236	108	8920c6867df1eeaec33e3e6253524700.exe	32
PID 108 wrote to memory of 1236	108	8920c6867df1eeaec33e3e6253524700.exe	32
PID 108 wrote to memory of 1236	108	8920c6867df1eeaec33e3e6253524700.exe	32
PID 308 wrote to memory of 864	308	Client.exe	34
PID 308 wrote to memory of 864	308	Client.exe	34
PID 308 wrote to memory of 864	308	Client.exe	34
PID 308 wrote to memory of 864	308	Client.exe	34
PID 108 wrote to memory of 1580	108	8920c6867df1eeaec33e3e6253524700.exe	36
PID 108 wrote to memory of 1580	108	8920c6867df1eeaec33e3e6253524700.exe	36
PID 108 wrote to memory of 1580	108	8920c6867df1eeaec33e3e6253524700.exe	36
PID 108 wrote to memory of 1580	108	8920c6867df1eeaec33e3e6253524700.exe	36
PID 1580 wrote to memory of 1992	1580	cmd.exe	38
PID 1580 wrote to memory of 1992	1580	cmd.exe	38
PID 1580 wrote to memory of 1992	1580	cmd.exe	38
PID 1580 wrote to memory of 1992	1580	cmd.exe	38
PID 108 wrote to memory of 1980	108	8920c6867df1eeaec33e3e6253524700.exe	39
PID 108 wrote to memory of 1980	108	8920c6867df1eeaec33e3e6253524700.exe	39
PID 108 wrote to memory of 1980	108	8920c6867df1eeaec33e3e6253524700.exe	39
PID 108 wrote to memory of 1980	108	8920c6867df1eeaec33e3e6253524700.exe	39
PID 1980 wrote to memory of 1352	1980	cmd.exe	41
PID 1980 wrote to memory of 1352	1980	cmd.exe	41
PID 1980 wrote to memory of 1352	1980	cmd.exe	41
PID 1980 wrote to memory of 1352	1980	cmd.exe	41
PID 1980 wrote to memory of 840	1980	cmd.exe	42
PID 1980 wrote to memory of 840	1980	cmd.exe	42
PID 1980 wrote to memory of 840	1980	cmd.exe	42
PID 1980 wrote to memory of 840	1980	cmd.exe	42
PID 1980 wrote to memory of 1356	1980	cmd.exe	43
PID 1980 wrote to memory of 1356	1980	cmd.exe	43
PID 1980 wrote to memory of 1356	1980	cmd.exe	43
PID 1980 wrote to memory of 1356	1980	cmd.exe	43

C:\Users\Admin\AppData\Local\Temp\8920c6867df1eeaec33e3e6253524700.exe
"C:\Users\Admin\AppData\Local\Temp\8920c6867df1eeaec33e3e6253524700.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:108
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\8920c6867df1eeaec33e3e6253524700.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1996
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:308
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:864
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1236
- 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:1580
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1992
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\GI2syKzJcshq.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1980
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1352
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:840
- - C:\Users\Admin\AppData\Local\Temp\8920c6867df1eeaec33e3e6253524700.exe
    "C:\Users\Admin\AppData\Local\Temp\8920c6867df1eeaec33e3e6253524700.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1356

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\GI2syKzJcshq.bat

MD5
9f100bae16ab4498f74f878d8d842f65

SHA1
e5853fda64b9c86c91eace6c0f6641fce95a2760

SHA256
b30b1b5b50d0df46d30be879d21fb136fc64b417ee4fec936a9fdeacc28d6f41

SHA512
c25d16558c8bc0045cacc78cb685812b05972b696575424e2a906dc579c33d090d31dde0c482df6995225dab575ec563aaff0e962b32a36ee05de3ff88c31e53

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5
8920c6867df1eeaec33e3e6253524700

SHA1
4ce786281b76b6949166092faa9bfccee4e2c599

SHA256
b126d2bf73da9bce2f1a0748febb99510127eee852284a75c777ebac33b39649

SHA512
fec621690ca21fc62a46c6b285a0bad0d6f3e4c792997616216b227b5a01db78b1b769c4847f3b6d0bc70d95f12b73885156b3164f319cda5d44b34861ef12e2

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5
8920c6867df1eeaec33e3e6253524700

SHA1
4ce786281b76b6949166092faa9bfccee4e2c599

SHA256
b126d2bf73da9bce2f1a0748febb99510127eee852284a75c777ebac33b39649

SHA512
fec621690ca21fc62a46c6b285a0bad0d6f3e4c792997616216b227b5a01db78b1b769c4847f3b6d0bc70d95f12b73885156b3164f319cda5d44b34861ef12e2

Download Submit
\Users\Admin\AppData\Roaming\SubDir\Client.exe

MD5
8920c6867df1eeaec33e3e6253524700

SHA1
4ce786281b76b6949166092faa9bfccee4e2c599

SHA256
b126d2bf73da9bce2f1a0748febb99510127eee852284a75c777ebac33b39649

SHA512
fec621690ca21fc62a46c6b285a0bad0d6f3e4c792997616216b227b5a01db78b1b769c4847f3b6d0bc70d95f12b73885156b3164f319cda5d44b34861ef12e2

Download Submit
memory/108-1-0x0000000000350000-0x0000000000351000-memory.dmp

Filesize
4KB

Download
memory/108-0-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download
memory/308-5-0x0000000000000000-mapping.dmp

Download
memory/308-8-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download
memory/308-10-0x0000000000060000-0x0000000000061000-memory.dmp

Filesize
4KB

Download
memory/840-56-0x0000000000000000-mapping.dmp

Download
memory/864-16-0x0000000000000000-mapping.dmp

Download
memory/1236-20-0x0000000005610000-0x0000000005611000-memory.dmp

Filesize
4KB

Download
memory/1236-49-0x0000000006330000-0x0000000006331000-memory.dmp

Filesize
4KB

Download
memory/1236-15-0x0000000001110000-0x0000000001111000-memory.dmp

Filesize
4KB

Download
memory/1236-13-0x0000000000FE0000-0x0000000000FE1000-memory.dmp

Filesize
4KB

Download
memory/1236-17-0x0000000005320000-0x0000000005321000-memory.dmp

Filesize
4KB

Download
memory/1236-12-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download
memory/1236-25-0x0000000005710000-0x0000000005711000-memory.dmp

Filesize
4KB

Download
memory/1236-26-0x0000000006140000-0x0000000006141000-memory.dmp

Filesize
4KB

Download
memory/1236-33-0x00000000062A0000-0x00000000062A1000-memory.dmp

Filesize
4KB

Download
memory/1236-34-0x00000000055D0000-0x00000000055D1000-memory.dmp

Filesize
4KB

Download
memory/1236-48-0x0000000006320000-0x0000000006321000-memory.dmp

Filesize
4KB

Download
memory/1236-14-0x00000000049A0000-0x00000000049A1000-memory.dmp

Filesize
4KB

Download
memory/1236-9-0x0000000000000000-mapping.dmp

Download
memory/1352-55-0x0000000000000000-mapping.dmp

Download
memory/1356-57-0x0000000000000000-mapping.dmp

Download
memory/1356-58-0x0000000000000000-mapping.dmp

Download
memory/1356-59-0x0000000074790000-0x0000000074E7E000-memory.dmp

Filesize
6.9MB

Download
memory/1356-60-0x0000000000A40000-0x0000000000A41000-memory.dmp

Filesize
4KB

Download
memory/1580-50-0x0000000000000000-mapping.dmp

Download
memory/1980-53-0x0000000000000000-mapping.dmp

Download
memory/1992-51-0x0000000000000000-mapping.dmp

Download
memory/1992-52-0x0000000000000000-mapping.dmp

Download
memory/1996-3-0x0000000000000000-mapping.dmp

Download