asyncrat | a4f19a9864c086af408e8d0dce4ae4489e0cf07b1ada8ea947bca5f5c24bc445

Analysis

max time kernel
92s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-11-2024 23:46

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General

Target

DEMANDA LABORAL POR ABUSO DE CONFIANZA 01/WINMM.dll
Size

5.0MB
MD5

9d9b59e2893e58686a0cc608522102bd
SHA1

b4a213c4f456ca191efc5711f0d2d819874444aa
SHA256

7b91d4680dd3d290703a50db25b751cb9c7c8b612c1bed0d389ce9ace1f81333
SHA512

327e63d2c5604210e8ba54d94fcd86b3dfeb91d0cf7af70110869d4f3aafbf00b4f8526defc9dcdeba36449d3fd9d6ddbb97a63ad169f4bbe8cb7a84b07ba218
SSDEEP

98304:XVo25lOF7FdfzW64cv5tQpgBZwy7zJDSiQCz+acvnIpeT+4:XVoGQJF7v5tQpgBZR7zJDSiQCz+acvI1

Score

10^/10

asyncrat remcos plata remotehost discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

mastermrcol.net:6565

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-89JTT1
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Extracted

Family

asyncrat

Version

| CRACKED BY https://t.me/xworm_v2

Botnet

PLATA

mastermrcol.net:7474

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
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
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral4/files/0x0007000000023ca9-23.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 2 IoCs

Processes:

svchost.exeAsyncClient.exe

pid	Process
1744	svchost.exe
4476	AsyncClient.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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

Processes:

svchost.exeAsyncClient.exeWScript.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncClient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 1 IoCs

Processes:

svchost.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000_Classes\Local Settings	svchost.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

Processes:

schtasks.exe

pid	Process
4716	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

rundll32.exe

pid	Process
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe
3396	rundll32.exe

Suspicious behavior: LoadsDriver 2 IoCs

Processes:

pid	Process
664
664

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

AsyncClient.exe

description	pid	Process
Token: SeDebugPrivilege	4476	AsyncClient.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

rundll32.execmd.exesvchost.exe

description	pid	Process	procid_target
PID 3396 wrote to memory of 1960	3396	rundll32.exe	88
PID 3396 wrote to memory of 1960	3396	rundll32.exe	88
PID 1960 wrote to memory of 4716	1960	cmd.exe	90
PID 1960 wrote to memory of 4716	1960	cmd.exe	90
PID 3396 wrote to memory of 1744	3396	rundll32.exe	91
PID 3396 wrote to memory of 1744	3396	rundll32.exe	91
PID 3396 wrote to memory of 1744	3396	rundll32.exe	91
PID 1744 wrote to memory of 4476	1744	svchost.exe	95
PID 1744 wrote to memory of 4476	1744	svchost.exe	95
PID 1744 wrote to memory of 4476	1744	svchost.exe	95
PID 1744 wrote to memory of 1280	1744	svchost.exe	101
PID 1744 wrote to memory of 1280	1744	svchost.exe	101
PID 1744 wrote to memory of 1280	1744	svchost.exe	101

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\DEMANDA LABORAL POR ABUSO DE CONFIANZA 01\WINMM.dll",#1
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3396
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c schtasks /create /tn "h5czQ95nhaFoPRcK" /tr "C:\Users\Admin\AppData\Roaming\rundll32.exe" /sc onlogon /rl highest /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1960
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "h5czQ95nhaFoPRcK" /tr "C:\Users\Admin\AppData\Roaming\rundll32.exe" /sc onlogon /rl highest /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4716
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1744
- - C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4476
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\zjcitxakacjvpzicsunorgmlzyoysps.vbs"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1280

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe

Filesize
66KB

MD5
07554efccfc2a1b265e155f689bf46be

SHA1
5a5103b26e6584863f4f1e3c210edede6c58064a

SHA256
0e0b867c176d56b9ee2fe6ef05534d1051df3c5f05116b2af16cbe365276d6e7

SHA512
8ed2d1d358ac0818eb67340bfc57130e1a020007a393bc43aac42ebb7dd44d2627293e81c8a733a874f5f54a8e509ba4acbab04619b0272d95c2688192b59461

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
481KB

MD5
7351848cf8f7b5307295fd43baa212b0

SHA1
72e21a3a6a5d28ba4750c2dbfe68d772922c658b

SHA256
ace75a22a1dae4bab204a56aae3461619ed52a1315bdd1efb5197debff2268d0

SHA512
ba9cad85728ea0b1a7c2144e788c9f83d4a6086607b244697a641c15a5f09aad4d226772a5ea001e41ba5abf85e1d39259bbffc33f72a355fbb1804a65e79f38

Download Submit
C:\Users\Admin\AppData\Local\Temp\zjcitxakacjvpzicsunorgmlzyoysps.vbs

Filesize
500B

MD5
f1da013fa58295ac94372331e618f047

SHA1
b52f602bca7d2b9a04a55be4a1a4de857c98cbdb

SHA256
01df7d7ec8acb49f038a93cf1aeb9a79ddda138fa38992f477e6448689c09cd9

SHA512
fc1cfb5f09b5d96958d9387f582629e6691e996890ea345466fc47e214be074c9c625f3fb7f4e86d7e5b9864edcfe0d40031e6a0d6c496c5427d21bcffba26a8

Download Submit
memory/3396-32-0x000000006D080000-0x000000006D57E000-memory.dmp

Filesize
5.0MB

Download
memory/3396-0-0x0000000000400000-0x0000000000835000-memory.dmp

Filesize
4.2MB

Download
memory/4476-35-0x0000000006230000-0x00000000062CC000-memory.dmp

Filesize
624KB

Download
memory/4476-31-0x0000000000E60000-0x0000000000E76000-memory.dmp

Filesize
88KB

Download
memory/4476-36-0x0000000006880000-0x0000000006E24000-memory.dmp

Filesize
5.6MB

Download
memory/4476-37-0x00000000062D0000-0x0000000006336000-memory.dmp

Filesize
408KB

Download
memory/4476-38-0x000000007343E000-0x000000007343F000-memory.dmp

Filesize
4KB

Download
memory/4476-30-0x000000007343E000-0x000000007343F000-memory.dmp

Filesize
4KB

Download
memory/4476-44-0x0000000007430000-0x00000000074A6000-memory.dmp

Filesize
472KB

Download
memory/4476-45-0x00000000073B0000-0x00000000073D6000-memory.dmp

Filesize
152KB

Download
memory/4476-46-0x00000000074B0000-0x00000000074CE000-memory.dmp

Filesize
120KB

Download