asyncrat | d12d87e04dc64cbc675d39046f6cd496f84da00d880a721979a11811c8728716

General

Target

RVF001.exe
Size

300.0MB
MD5

fdd6bb2ce995b36d49d3196894192988
SHA1

9e8b9db35c796ccd6622771ffc5d333038d3333d
SHA256

a09c85265ae57ce325328a06925d3fbc61021f2ca815d00858c3024ab6f8e3a8
SHA512

e337f94b47930a8e01ef4877a45578c9e1bf430111a6c27de03f50cee599717e4c0605f01f41d70b2123ef3bf12fb695893965876cd90ac4a17746dc8b7389e2
SSDEEP

3072:9q1IYuRXuhcSOY/hQ6d1XmRsDvHt02pWJJ67rmvHszvTBFUa:UyY6TYC6d1XjxpWJmryHszvTBFZ

Score

10^/10

asyncrat venom clients discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT 5.0.5

Botnet

Venom Clients

C2

ry8325585.duckdns.org:6087

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 written in C#.
rat asyncrat
Asyncrat family
asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2600	regdsop.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2988 set thread context of 2224	2988	RVF001.exe	35

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RVF001.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regdsop.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2356	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2224	vbc.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2756	2988	RVF001.exe	30
PID 2988 wrote to memory of 2756	2988	RVF001.exe	30
PID 2988 wrote to memory of 2756	2988	RVF001.exe	30
PID 2988 wrote to memory of 2756	2988	RVF001.exe	30
PID 2756 wrote to memory of 2356	2756	cmd.exe	32
PID 2756 wrote to memory of 2356	2756	cmd.exe	32
PID 2756 wrote to memory of 2356	2756	cmd.exe	32
PID 2756 wrote to memory of 2356	2756	cmd.exe	32
PID 2988 wrote to memory of 2816	2988	RVF001.exe	33
PID 2988 wrote to memory of 2816	2988	RVF001.exe	33
PID 2988 wrote to memory of 2816	2988	RVF001.exe	33
PID 2988 wrote to memory of 2816	2988	RVF001.exe	33
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2988 wrote to memory of 2224	2988	RVF001.exe	35
PID 2152 wrote to memory of 2600	2152	taskeng.exe	38
PID 2152 wrote to memory of 2600	2152	taskeng.exe	38
PID 2152 wrote to memory of 2600	2152	taskeng.exe	38
PID 2152 wrote to memory of 2600	2152	taskeng.exe	38

C:\Users\Admin\AppData\Local\Temp\RVF001.exe
"C:\Users\Admin\AppData\Local\Temp\RVF001.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Roaming\regdsop.exe'" /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2756
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Roaming\regdsop.exe'" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2356
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\RVF001.exe" "C:\Users\Admin\AppData\Roaming\regdsop.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2816
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2224

C:\Windows\system32\taskeng.exe
taskeng.exe {E5948C6A-0615-41EF-8337-F8FE4BF7F7A2} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2152
- C:\Users\Admin\AppData\Roaming\regdsop.exe
  C:\Users\Admin\AppData\Roaming\regdsop.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2224-5-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2224-11-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2224-13-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2224-15-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2224-7-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2224-9-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2224-8-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2224-6-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2600-20-0x0000000000080000-0x00000000000B2000-memory.dmp

Filesize
200KB

Download
memory/2988-1-0x0000000001040000-0x0000000001072000-memory.dmp

Filesize
200KB

Download
memory/2988-0-0x0000000074D4E000-0x0000000074D4F000-memory.dmp

Filesize
4KB

Download
memory/2988-4-0x0000000074D40000-0x000000007542E000-memory.dmp

Filesize
6.9MB

Download
memory/2988-3-0x0000000074D4E000-0x0000000074D4F000-memory.dmp

Filesize
4KB

Download
memory/2988-2-0x0000000074D40000-0x000000007542E000-memory.dmp

Filesize
6.9MB

Download
memory/2988-17-0x0000000074D40000-0x000000007542E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads