asyncrat | b77a024602ae648ad80a3fd49f08a26b99c377b81b189b60f474437ab13205b4

Resubmissions

09/01/2023, 12:41

230109-pwzjmahf3z10

09/01/2023, 12:31

230109-pp2qeahe9110

Analysis

max time kernel
103s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
09/01/2023, 12:31

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Report Analysis Logs

General

Target
98bb7310f473f8151d19643afb9142c0.exe
Size 915KB
Sample230109-pp2qeahe91
SHA256 b77a024602ae648ad80a3fd49f08a26b99c377b81b189b60f474437ab13205b4
MD5 98bb7310f473f8151d19643afb9142c0
SHA1 470d392167d337c8c64f02298f8c47f11385c188
SHA512 0ba43ae3b0727738c959a57db161724957e1ac0e05dddcf5e97de65565472689a5d73c682be1117b3b8bb58b1f1f191703fe2c536f344c4c7a304816f70660fa
SSDEEP 12288:aY60OiHviUznMCR0O0JMRZe+3gyJ+s7RYdWbNo5EET9G/Sau4qQQi5W13mWNVALF:aWZPRPZrbZq9u014
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat venom clients evasion persistence rat

Malware Config

Extracted

Family

asyncrat

Version

VenomRAT+HVNC+Stealer Version:5.0.9

Botnet

Venom Clients

185.132.176.192:4449

Mutex

Venom_RAT_HVNC_Mutex_Venom RAT_HVNC

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/4744-134-0x0000000000400000-0x0000000000416000-memory.dmp	asyncrat
behavioral2/memory/4744-135-0x000000000041165E-mapping.dmp	asyncrat

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	98bb7310f473f8151d19643afb9142c0.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	98bb7310f473f8151d19643afb9142c0.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	98bb7310f473f8151d19643afb9142c0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	98bb7310f473f8151d19643afb9142c0.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\62E797958FDC4E9DB6894BFAAB84D550 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\98bb7310f473f8151d19643afb9142c0.exe\""	98bb7310f473f8151d19643afb9142c0.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	98bb7310f473f8151d19643afb9142c0.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	98bb7310f473f8151d19643afb9142c0.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5100 set thread context of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1040	4744	WerFault.exe	92

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
5100	98bb7310f473f8151d19643afb9142c0.exe
4744	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5100	98bb7310f473f8151d19643afb9142c0.exe
Token: SeDebugPrivilege	4744	AddInProcess32.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 5100 wrote to memory of 4632	5100	98bb7310f473f8151d19643afb9142c0.exe	80
PID 5100 wrote to memory of 4632	5100	98bb7310f473f8151d19643afb9142c0.exe	80
PID 5100 wrote to memory of 4324	5100	98bb7310f473f8151d19643afb9142c0.exe	81
PID 5100 wrote to memory of 4324	5100	98bb7310f473f8151d19643afb9142c0.exe	81
PID 5100 wrote to memory of 1652	5100	98bb7310f473f8151d19643afb9142c0.exe	82
PID 5100 wrote to memory of 1652	5100	98bb7310f473f8151d19643afb9142c0.exe	82
PID 5100 wrote to memory of 3640	5100	98bb7310f473f8151d19643afb9142c0.exe	83
PID 5100 wrote to memory of 3640	5100	98bb7310f473f8151d19643afb9142c0.exe	83
PID 5100 wrote to memory of 4768	5100	98bb7310f473f8151d19643afb9142c0.exe	91
PID 5100 wrote to memory of 4768	5100	98bb7310f473f8151d19643afb9142c0.exe	91
PID 5100 wrote to memory of 4776	5100	98bb7310f473f8151d19643afb9142c0.exe	89
PID 5100 wrote to memory of 4776	5100	98bb7310f473f8151d19643afb9142c0.exe	89
PID 5100 wrote to memory of 4756	5100	98bb7310f473f8151d19643afb9142c0.exe	88
PID 5100 wrote to memory of 4756	5100	98bb7310f473f8151d19643afb9142c0.exe	88
PID 5100 wrote to memory of 4288	5100	98bb7310f473f8151d19643afb9142c0.exe	87
PID 5100 wrote to memory of 4288	5100	98bb7310f473f8151d19643afb9142c0.exe	87
PID 5100 wrote to memory of 2172	5100	98bb7310f473f8151d19643afb9142c0.exe	85
PID 5100 wrote to memory of 2172	5100	98bb7310f473f8151d19643afb9142c0.exe	85
PID 5100 wrote to memory of 4696	5100	98bb7310f473f8151d19643afb9142c0.exe	84
PID 5100 wrote to memory of 4696	5100	98bb7310f473f8151d19643afb9142c0.exe	84
PID 5100 wrote to memory of 4728	5100	98bb7310f473f8151d19643afb9142c0.exe	86
PID 5100 wrote to memory of 4728	5100	98bb7310f473f8151d19643afb9142c0.exe	86
PID 5100 wrote to memory of 4736	5100	98bb7310f473f8151d19643afb9142c0.exe	90
PID 5100 wrote to memory of 4736	5100	98bb7310f473f8151d19643afb9142c0.exe	90
PID 5100 wrote to memory of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92
PID 5100 wrote to memory of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92
PID 5100 wrote to memory of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92
PID 5100 wrote to memory of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92
PID 5100 wrote to memory of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92
PID 5100 wrote to memory of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92
PID 5100 wrote to memory of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92
PID 5100 wrote to memory of 4744	5100	98bb7310f473f8151d19643afb9142c0.exe	92

C:\Users\Admin\AppData\Local\Temp\98bb7310f473f8151d19643afb9142c0.exe
"C:\Users\Admin\AppData\Local\Temp\98bb7310f473f8151d19643afb9142c0.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\vbc.exe"
  2⤵
  PID:4632
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe"
  2⤵
  PID:4324
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe"
  2⤵
  PID:1652
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe"
  2⤵
  PID:3640
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe"
  2⤵
  PID:4696
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe"
  2⤵
  PID:2172
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\DataSvcUtil.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\DataSvcUtil.exe"
  2⤵
  PID:4728
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe"
  2⤵
  PID:4288
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\EdmGen.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\EdmGen.exe"
  2⤵
  PID:4756
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe"
  2⤵
  PID:4776
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe"
  2⤵
  PID:4736
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe"
  2⤵
  PID:4768
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4744
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4744 -s 2848
    3⤵
    - Program crash
    PID:1040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 4744 -ip 4744
1⤵
PID:3440

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4744-134-0x0000000000400000-0x0000000000416000-memory.dmp

Download

memory/4744-137-0x0000000005DE0000-0x0000000005E7C000-memory.dmp

Download

memory/4744-138-0x0000000006430000-0x00000000069D4000-memory.dmp

Download

memory/4744-139-0x0000000005EF0000-0x0000000005F56000-memory.dmp

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memory/4744-140-0x0000000007330000-0x00000000073A6000-memory.dmp

Download

memory/4744-141-0x0000000007310000-0x000000000732E000-memory.dmp

Download

memory/5100-132-0x00000281F15B0000-0x00000281F169A000-memory.dmp

Download

memory/5100-133-0x00007FFA67360000-0x00007FFA67E21000-memory.dmp

Download

memory/5100-136-0x00007FFA67360000-0x00007FFA67E21000-memory.dmp

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