asyncrat | 8bd8e4dff728c174981743c2591dc33925092bd728b0d853c808bfd1f18278c9

Analysis

max time kernel
150s
max time network
152s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-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
1428	wyehd.exe
2380	wyehd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2488 set thread context of 2560	2488	eVoucher.exe	35
PID 1428 set thread context of 316	1428	wyehd.exe	42

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	eVoucher.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	RegAsm.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	wyehd.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	wyehd.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
1204	schtasks.exe
2832	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2560	RegAsm.exe
Token: SeDebugPrivilege	316	RegAsm.exe

Suspicious use of WriteProcessMemory 62 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2872	2488	eVoucher.exe	30
PID 2488 wrote to memory of 2872	2488	eVoucher.exe	30
PID 2488 wrote to memory of 2872	2488	eVoucher.exe	30
PID 2488 wrote to memory of 2872	2488	eVoucher.exe	30
PID 2488 wrote to memory of 2360	2488	eVoucher.exe	32
PID 2488 wrote to memory of 2360	2488	eVoucher.exe	32
PID 2488 wrote to memory of 2360	2488	eVoucher.exe	32
PID 2488 wrote to memory of 2360	2488	eVoucher.exe	32
PID 2872 wrote to memory of 2832	2872	cmd.exe	34
PID 2872 wrote to memory of 2832	2872	cmd.exe	34
PID 2872 wrote to memory of 2832	2872	cmd.exe	34
PID 2872 wrote to memory of 2832	2872	cmd.exe	34
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 2488 wrote to memory of 2560	2488	eVoucher.exe	35
PID 1508 wrote to memory of 1428	1508	taskeng.exe	38
PID 1508 wrote to memory of 1428	1508	taskeng.exe	38
PID 1508 wrote to memory of 1428	1508	taskeng.exe	38
PID 1508 wrote to memory of 1428	1508	taskeng.exe	38
PID 1508 wrote to memory of 1428	1508	taskeng.exe	38
PID 1508 wrote to memory of 1428	1508	taskeng.exe	38
PID 1508 wrote to memory of 1428	1508	taskeng.exe	38
PID 1428 wrote to memory of 1036	1428	wyehd.exe	39
PID 1428 wrote to memory of 1036	1428	wyehd.exe	39
PID 1428 wrote to memory of 1036	1428	wyehd.exe	39
PID 1428 wrote to memory of 1036	1428	wyehd.exe	39
PID 1428 wrote to memory of 1328	1428	wyehd.exe	40
PID 1428 wrote to memory of 1328	1428	wyehd.exe	40
PID 1428 wrote to memory of 1328	1428	wyehd.exe	40
PID 1428 wrote to memory of 1328	1428	wyehd.exe	40
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1036 wrote to memory of 1204	1036	cmd.exe	44
PID 1036 wrote to memory of 1204	1036	cmd.exe	44
PID 1036 wrote to memory of 1204	1036	cmd.exe	44
PID 1036 wrote to memory of 1204	1036	cmd.exe	44
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1428 wrote to memory of 316	1428	wyehd.exe	42
PID 1508 wrote to memory of 2380	1508	taskeng.exe	45
PID 1508 wrote to memory of 2380	1508	taskeng.exe	45
PID 1508 wrote to memory of 2380	1508	taskeng.exe	45
PID 1508 wrote to memory of 2380	1508	taskeng.exe	45
PID 1508 wrote to memory of 2380	1508	taskeng.exe	45
PID 1508 wrote to memory of 2380	1508	taskeng.exe	45
PID 1508 wrote to memory of 2380	1508	taskeng.exe	45

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:2488
- 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:2872
- - 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:2832
- 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:2360
- 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:2560

C:\Windows\system32\taskeng.exe
taskeng.exe {68836E6B-5ECA-4996-B032-D856475A2CCF} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1508
- C:\Users\Admin\AppData\Local\Temp\wyehd.exe
  C:\Users\Admin\AppData\Local\Temp\wyehd.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1428
- - 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
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1036
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /sc minute /mo 1 /tn "Nafdfnasia" /tr "'C:\Users\Admin\AppData\Local\Temp\wyehd.exe'" /f
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1204
- - C:\Windows\SysWOW64\cmd.exe
    "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\wyehd.exe" "C:\Users\Admin\AppData\Local\Temp\wyehd.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1328
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:316
- C:\Users\Admin\AppData\Local\Temp\wyehd.exe
  C:\Users\Admin\AppData\Local\Temp\wyehd.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2380

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

memory/316-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1428-20-0x0000000000CB0000-0x0000000000D38000-memory.dmp

Filesize
544KB

Download
memory/2380-35-0x00000000012A0000-0x0000000001328000-memory.dmp

Filesize
544KB

Download
memory/2488-17-0x0000000073F50000-0x000000007463E000-memory.dmp

Filesize
6.9MB

Download
memory/2488-9-0x0000000073F50000-0x000000007463E000-memory.dmp

Filesize
6.9MB

Download
memory/2488-0-0x0000000073F5E000-0x0000000073F5F000-memory.dmp

Filesize
4KB

Download
memory/2488-2-0x0000000073F5E000-0x0000000073F5F000-memory.dmp

Filesize
4KB

Download
memory/2488-1-0x0000000000F70000-0x0000000000FF8000-memory.dmp

Filesize
544KB

Download
memory/2560-4-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2560-5-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2560-6-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2560-7-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2560-12-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2560-16-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2560-14-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2560-3-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads