remcos | 4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2024 00:54

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General

Target

FAT6789098700900.scr.exe
Size

856KB
MD5

b7b504ea022610fe69940fd54fd2bc27
SHA1

8cb39de97c36eb8328436ffe21be24742925e652
SHA256

4c5bea1fa5f8547de2a03c6117e10a023d76edc17df923c5f8031bfa74e12e87
SHA512

4f38f6ff589cb607c2cbd5be4be78c5dffe9f03723ec9c9eee9c606b9a8143ade83dbd3c2639f2401ee47232b899fb9dbe9dde7fea5196c31483d2b552f4b313
SSDEEP

24576:KdeRzboLmkwWQ6Q2l/4SPTIXkORnLeV35YryHC:CyO37l5TkzRLePYryHC

Score

10^/10

remcos remotehost collection discovery execution rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

192.210.150.26:8787

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-R1T905
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

Detected Nirsoft tools 5 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

Processes:

resource	yara_rule
behavioral2/memory/3392-50-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/752-54-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2024-61-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3392-52-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3392-66-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/752-54-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/3392-50-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3392-52-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3392-66-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 2 IoCs

Processes:

Powershell.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe	Powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe	Powershell.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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

FAT6789098700900.scr.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	FAT6789098700900.scr.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

FAT6789098700900.scr.exeFAT6789098700900.scr.exe

description	pid	Process	procid_target
PID 2608 set thread context of 912	2608	FAT6789098700900.scr.exe	84
PID 912 set thread context of 3392	912	FAT6789098700900.scr.exe	85
PID 912 set thread context of 752	912	FAT6789098700900.scr.exe	87
PID 912 set thread context of 2024	912	FAT6789098700900.scr.exe	88

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

Processes:

Powershell.exe

pid	Process
4056	Powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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:

FAT6789098700900.scr.exeFAT6789098700900.scr.exeFAT6789098700900.scr.exeFAT6789098700900.scr.exePowershell.exeFAT6789098700900.scr.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FAT6789098700900.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FAT6789098700900.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FAT6789098700900.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FAT6789098700900.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FAT6789098700900.scr.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

Powershell.exeFAT6789098700900.scr.exeFAT6789098700900.scr.exe

pid	Process
4056	Powershell.exe
4056	Powershell.exe
3392	FAT6789098700900.scr.exe
3392	FAT6789098700900.scr.exe
2024	FAT6789098700900.scr.exe
2024	FAT6789098700900.scr.exe
3392	FAT6789098700900.scr.exe
3392	FAT6789098700900.scr.exe

Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

FAT6789098700900.scr.exe

pid	Process
912	FAT6789098700900.scr.exe
912	FAT6789098700900.scr.exe
912	FAT6789098700900.scr.exe
912	FAT6789098700900.scr.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Powershell.exeFAT6789098700900.scr.exe

description	pid	Process
Token: SeDebugPrivilege	4056	Powershell.exe
Token: SeDebugPrivilege	2024	FAT6789098700900.scr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

FAT6789098700900.scr.exe

pid	Process
912	FAT6789098700900.scr.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

FAT6789098700900.scr.exeFAT6789098700900.scr.exe

description	pid	Process	procid_target
PID 2608 wrote to memory of 4056	2608	FAT6789098700900.scr.exe	82
PID 2608 wrote to memory of 4056	2608	FAT6789098700900.scr.exe	82
PID 2608 wrote to memory of 4056	2608	FAT6789098700900.scr.exe	82
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 2608 wrote to memory of 912	2608	FAT6789098700900.scr.exe	84
PID 912 wrote to memory of 3392	912	FAT6789098700900.scr.exe	85
PID 912 wrote to memory of 3392	912	FAT6789098700900.scr.exe	85
PID 912 wrote to memory of 3392	912	FAT6789098700900.scr.exe	85
PID 912 wrote to memory of 3392	912	FAT6789098700900.scr.exe	85
PID 912 wrote to memory of 2848	912	FAT6789098700900.scr.exe	86
PID 912 wrote to memory of 2848	912	FAT6789098700900.scr.exe	86
PID 912 wrote to memory of 2848	912	FAT6789098700900.scr.exe	86
PID 912 wrote to memory of 752	912	FAT6789098700900.scr.exe	87
PID 912 wrote to memory of 752	912	FAT6789098700900.scr.exe	87
PID 912 wrote to memory of 752	912	FAT6789098700900.scr.exe	87
PID 912 wrote to memory of 752	912	FAT6789098700900.scr.exe	87
PID 912 wrote to memory of 2024	912	FAT6789098700900.scr.exe	88
PID 912 wrote to memory of 2024	912	FAT6789098700900.scr.exe	88
PID 912 wrote to memory of 2024	912	FAT6789098700900.scr.exe	88
PID 912 wrote to memory of 2024	912	FAT6789098700900.scr.exe	88

C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe
"C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2608
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
  "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'
  2⤵
  - Drops startup file
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4056
- C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe
  "C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:912
- - C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe
    C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe /stext "C:\Users\Admin\AppData\Local\Temp\vyaxdeevzhccteekj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3392
- - C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe
    C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe /stext "C:\Users\Admin\AppData\Local\Temp\xanqewopvpuhvksotqwy"
    3⤵
    PID:2848
- - C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe
    C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe /stext "C:\Users\Admin\AppData\Local\Temp\xanqewopvpuhvksotqwy"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:752
- - C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe
    C:\Users\Admin\AppData\Local\Temp\FAT6789098700900.scr.exe /stext "C:\Users\Admin\AppData\Local\Temp\iusafpzqjxmmgzoskbizfns"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2024

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
124B

MD5
18fa2d98bc48815d51ec2c5efa156bed

SHA1
cae94b6c9a8d4811eed9173fe13729a55168bc85

SHA256
ab33524c8aa080d8a43199ea08bc0accc6e6903b80a6770860620eb19f2817f8

SHA512
f018819903d121dc5db7cc291d9d5b48a36a1094d301b6fde0295918c38a807e5eb7d704339c01c349744b6745767e9ae868b8c60473a0034c5d211ea2ff17ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rks3qwie.tuk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\vyaxdeevzhccteekj

Filesize
4KB

MD5
57509a6a6267f17bef5e5da8b1df8829

SHA1
0886741be12c4e6dd24688df7b9568e91b2fc2aa

SHA256
4d50e4b2ee7b25d6a88dea6a28503975ca95f98e6e72fcd1ee754d016df3ed3d

SHA512
019c20a2354ef20ff3870ea4d544ae4e7ec21729bfbeb19d2dd2f8b087fcb6b83f259ab2f35e0f3c7f044ebb7c5bbfdfc63f23b811d458a15f5ad35aa9175228

Download Submit
memory/752-51-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/752-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/752-54-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/912-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-110-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-109-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-93-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-86-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-85-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-72-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/912-68-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/912-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-71-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/912-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2024-55-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2024-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2024-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2608-5-0x0000000004C70000-0x0000000004C7A000-memory.dmp

Filesize
40KB

Download
memory/2608-2-0x00000000051C0000-0x0000000005764000-memory.dmp

Filesize
5.6MB

Download
memory/2608-6-0x0000000004F10000-0x0000000004FBE000-memory.dmp

Filesize
696KB

Download
memory/2608-1-0x0000000000300000-0x00000000003DC000-memory.dmp

Filesize
880KB

Download
memory/2608-0-0x000000007497E000-0x000000007497F000-memory.dmp

Filesize
4KB

Download
memory/2608-7-0x0000000005060000-0x00000000050FC000-memory.dmp

Filesize
624KB

Download
memory/2608-74-0x000000007497E000-0x000000007497F000-memory.dmp

Filesize
4KB

Download
memory/2608-75-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/2608-28-0x0000000004DD0000-0x0000000004DD8000-memory.dmp

Filesize
32KB

Download
memory/2608-3-0x0000000004CB0000-0x0000000004D42000-memory.dmp

Filesize
584KB

Download
memory/2608-4-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/3392-49-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3392-52-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3392-66-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3392-50-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3392-47-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4056-14-0x0000000005450000-0x00000000054B6000-memory.dmp

Filesize
408KB

Download
memory/4056-64-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/4056-46-0x0000000006120000-0x0000000006142000-memory.dmp

Filesize
136KB

Download
memory/4056-45-0x00000000060A0000-0x00000000060BA000-memory.dmp

Filesize
104KB

Download
memory/4056-44-0x0000000006E90000-0x0000000006F26000-memory.dmp

Filesize
600KB

Download
memory/4056-27-0x00000000061D0000-0x000000000621C000-memory.dmp

Filesize
304KB

Download
memory/4056-26-0x0000000005C20000-0x0000000005C3E000-memory.dmp

Filesize
120KB

Download
memory/4056-25-0x0000000005630000-0x0000000005984000-memory.dmp

Filesize
3.3MB

Download
memory/4056-15-0x00000000055C0000-0x0000000005626000-memory.dmp

Filesize
408KB

Download
memory/4056-13-0x0000000004C60000-0x0000000004C82000-memory.dmp

Filesize
136KB

Download
memory/4056-11-0x0000000004E20000-0x0000000005448000-memory.dmp

Filesize
6.2MB

Download
memory/4056-12-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/4056-10-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download
memory/4056-8-0x0000000002320000-0x0000000002356000-memory.dmp

Filesize
216KB

Download
memory/4056-9-0x0000000074970000-0x0000000075120000-memory.dmp

Filesize
7.7MB

Download