asyncrat | 8bd8e4dff728c174981743c2591dc33925092bd728b0d853c808bfd1f18278c9

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29/12/2024, 09:36

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General

Target

eVoucher.exe
Size

300.0MB
MD5

3bf947955196c0d542ab337354bba05f
SHA1

9695affc705e866e7b1307ecfadd9db37acc3918
SHA256

49cb3e0011f6d43b205c5336abf642d56ad93c7ebb250aa8cc907d08d06f382e
SHA512

1dd243cc586dc516044b9e42452bba87a796a6c177bfef7cd4a1be12bd7282f3887bf220b2411f360c5ba82bd59276ccc3265b4aecc2173cd3f6a7d88194fe6f
SSDEEP

6144:xpOo/IPZccVtOw7Msw0b+lNZxsEOFco5z:rOo/YZ1QQXz6lHP8

Score

10^/10

asyncrat august-04 discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT 5.0.5

Botnet

August-04

fejong.duckdns.org:25045

Mutex

iordes45s

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 2 IoCs

pid	Process
4164	wyehd.exe
1144	wyehd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3492 set thread context of 3628	3492	eVoucher.exe	94
PID 4164 set thread context of 1600	4164	wyehd.exe	99

System Location Discovery: System Language Discovery 1 TTPs 11 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wyehd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eVoucher.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wyehd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1400	schtasks.exe
652	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3628	RegAsm.exe
Token: SeDebugPrivilege	1600	RegAsm.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 3492 wrote to memory of 5052	3492	eVoucher.exe	89
PID 3492 wrote to memory of 5052	3492	eVoucher.exe	89
PID 3492 wrote to memory of 5052	3492	eVoucher.exe	89
PID 3492 wrote to memory of 2800	3492	eVoucher.exe	91
PID 3492 wrote to memory of 2800	3492	eVoucher.exe	91
PID 3492 wrote to memory of 2800	3492	eVoucher.exe	91
PID 5052 wrote to memory of 1400	5052	cmd.exe	93
PID 5052 wrote to memory of 1400	5052	cmd.exe	93
PID 5052 wrote to memory of 1400	5052	cmd.exe	93
PID 3492 wrote to memory of 3628	3492	eVoucher.exe	94
PID 3492 wrote to memory of 3628	3492	eVoucher.exe	94
PID 3492 wrote to memory of 3628	3492	eVoucher.exe	94
PID 3492 wrote to memory of 3628	3492	eVoucher.exe	94
PID 3492 wrote to memory of 3628	3492	eVoucher.exe	94
PID 3492 wrote to memory of 3628	3492	eVoucher.exe	94
PID 3492 wrote to memory of 3628	3492	eVoucher.exe	94
PID 3492 wrote to memory of 3628	3492	eVoucher.exe	94
PID 4164 wrote to memory of 4668	4164	wyehd.exe	97
PID 4164 wrote to memory of 4668	4164	wyehd.exe	97
PID 4164 wrote to memory of 4668	4164	wyehd.exe	97
PID 4164 wrote to memory of 4740	4164	wyehd.exe	98
PID 4164 wrote to memory of 4740	4164	wyehd.exe	98
PID 4164 wrote to memory of 4740	4164	wyehd.exe	98
PID 4164 wrote to memory of 1600	4164	wyehd.exe	99
PID 4164 wrote to memory of 1600	4164	wyehd.exe	99
PID 4164 wrote to memory of 1600	4164	wyehd.exe	99
PID 4164 wrote to memory of 1600	4164	wyehd.exe	99
PID 4164 wrote to memory of 1600	4164	wyehd.exe	99
PID 4164 wrote to memory of 1600	4164	wyehd.exe	99
PID 4164 wrote to memory of 1600	4164	wyehd.exe	99
PID 4164 wrote to memory of 1600	4164	wyehd.exe	99
PID 4668 wrote to memory of 652	4668	cmd.exe	102
PID 4668 wrote to memory of 652	4668	cmd.exe	102
PID 4668 wrote to memory of 652	4668	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\eVoucher.exe
"C:\Users\Admin\AppData\Local\Temp\eVoucher.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3492
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\wyehd.exe'" /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5052
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\wyehd.exe'" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1400
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\eVoucher.exe" "C:\Users\Admin\AppData\Local\Temp\wyehd.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2800
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3628

C:\Users\Admin\AppData\Local\Temp\wyehd.exe
C:\Users\Admin\AppData\Local\Temp\wyehd.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4164
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\wyehd.exe'" /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4668
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\wyehd.exe'" /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:652
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\wyehd.exe" "C:\Users\Admin\AppData\Local\Temp\wyehd.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4740
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1600

C:\Users\Admin\AppData\Local\Temp\wyehd.exe
C:\Users\Admin\AppData\Local\Temp\wyehd.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1144

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\wyehd.exe.log

Filesize
520B

MD5
3ca2f9e6a94c24c455ac9431a0bf479b

SHA1
a90309eec691588990609f8f8ad9b935d6f38eb2

SHA256
e84d0c64750ec6333b67eb8aef737bb21cd86c6ef6e520c6537ede13505e125e

SHA512
ba66e42b384f0d865a21d9169169a0b2bd9c62ebee68acc63a191b1a67ca16f4534f955055fc84bbc4a9cd22cec11c3c22a15df7741d99b7dec456e5cabcb0b5

Download Submit
memory/3492-9-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download
memory/3492-2-0x0000000074C4E000-0x0000000074C4F000-memory.dmp

Filesize
4KB

Download
memory/3492-3-0x0000000005FA0000-0x0000000006544000-memory.dmp

Filesize
5.6MB

Download
memory/3492-4-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download
memory/3492-1-0x0000000000C70000-0x0000000000CF8000-memory.dmp

Filesize
544KB

Download
memory/3492-0-0x0000000074C4E000-0x0000000074C4F000-memory.dmp

Filesize
4KB

Download
memory/3628-11-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download
memory/3628-10-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download
memory/3628-12-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download
memory/3628-13-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download
memory/3628-7-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4164-16-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download
memory/4164-17-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download
memory/4164-20-0x0000000074C40000-0x00000000753F0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads