remcos | 7025a565fe7b2b8a05477201f7dfdf8f2735dd056626aa0fbf6a949a4e61179f

Analysis

max time kernel
149s
max time network
150s
platform
windows10_x64
resource
win10-en-20211208
submitted
03/01/2022, 07:56

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General

Target
Due_Statement_00000010000100100002000000000000.exe
Size 643KB
Sample220103-jspblahecj
SHA256 7025a565fe7b2b8a05477201f7dfdf8f2735dd056626aa0fbf6a949a4e61179f
MD5 6bd9cbea3fe38ad78c46130e9f92759f
SHA1 44f0edfe365c901bda39c4631fb63ec504bce9b8
SHA512 62952cf77315ac15ab888664ba6a10f2ce18d68ec93ab2c707cd75a19022ef79f5a67c5257ee002999d3bd3948030da4327576ab181f3ee0f544116c6caf4838
MD5 SHA1 SHA512

Score

10^/10

remcos timeprom collection persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Version

3.3.0 Pro

Botnet

timeprom

vstore101.com:2491

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
internets.exe
copy_folder
Web
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%Temp%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
wiwissidjshd-HQ159T
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
internets
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

Signatures

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

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2696-151-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1732-144-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/1732-144-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3052-147-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2696-151-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft

Executes dropped EXE 5 IoCs

pid	Process
3860	internets.exe
1204	internets.exe
1732	internets.exe
3052	internets.exe
2696	internets.exe

Loads dropped DLL 2 IoCs

pid	Process
640	Due_Statement_00000010000100100002000000000000.exe
3860	internets.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	internets.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run\	internets.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run\internets = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Web\\internets.exe\""	internets.exe
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Due_Statement_00000010000100100002000000000000.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run\internets = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Web\\internets.exe\""	Due_Statement_00000010000100100002000000000000.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1204 set thread context of 1732	1204	internets.exe	75
PID 1204 set thread context of 3052	1204	internets.exe	76
PID 1204 set thread context of 2696	1204	internets.exe	77

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

NSIS installer 12 IoCs

installer

resource	yara_rule
behavioral2/files/0x000500000001ab7d-127.dat	nsis_installer_1
behavioral2/files/0x000500000001ab7d-127.dat	nsis_installer_2
behavioral2/files/0x000500000001ab7d-128.dat	nsis_installer_1
behavioral2/files/0x000500000001ab7d-128.dat	nsis_installer_2
behavioral2/files/0x000500000001ab7d-133.dat	nsis_installer_1
behavioral2/files/0x000500000001ab7d-133.dat	nsis_installer_2
behavioral2/files/0x000500000001ab7d-142.dat	nsis_installer_1
behavioral2/files/0x000500000001ab7d-142.dat	nsis_installer_2
behavioral2/files/0x000500000001ab7d-146.dat	nsis_installer_1
behavioral2/files/0x000500000001ab7d-146.dat	nsis_installer_2
behavioral2/files/0x000500000001ab7d-150.dat	nsis_installer_1
behavioral2/files/0x000500000001ab7d-150.dat	nsis_installer_2

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000_Classes\Local Settings	Due_Statement_00000010000100100002000000000000.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1732	internets.exe
1732	internets.exe
3052	internets.exe
3052	internets.exe
1732	internets.exe
1732	internets.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3052	internets.exe

Suspicious use of WriteProcessMemory 54 IoCs

description	pid	Process	procid_target
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 640 wrote to memory of 1256	640	Due_Statement_00000010000100100002000000000000.exe	69
PID 1256 wrote to memory of 2368	1256	Due_Statement_00000010000100100002000000000000.exe	70
PID 1256 wrote to memory of 2368	1256	Due_Statement_00000010000100100002000000000000.exe	70
PID 1256 wrote to memory of 2368	1256	Due_Statement_00000010000100100002000000000000.exe	70
PID 2368 wrote to memory of 1520	2368	WScript.exe	71
PID 2368 wrote to memory of 1520	2368	WScript.exe	71
PID 2368 wrote to memory of 1520	2368	WScript.exe	71
PID 1520 wrote to memory of 3860	1520	cmd.exe	73
PID 1520 wrote to memory of 3860	1520	cmd.exe	73
PID 1520 wrote to memory of 3860	1520	cmd.exe	73
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 3860 wrote to memory of 1204	3860	internets.exe	74
PID 1204 wrote to memory of 1732	1204	internets.exe	75
PID 1204 wrote to memory of 1732	1204	internets.exe	75
PID 1204 wrote to memory of 1732	1204	internets.exe	75
PID 1204 wrote to memory of 1732	1204	internets.exe	75
PID 1204 wrote to memory of 1732	1204	internets.exe	75
PID 1204 wrote to memory of 1732	1204	internets.exe	75
PID 1204 wrote to memory of 1732	1204	internets.exe	75
PID 1204 wrote to memory of 3052	1204	internets.exe	76
PID 1204 wrote to memory of 3052	1204	internets.exe	76
PID 1204 wrote to memory of 3052	1204	internets.exe	76
PID 1204 wrote to memory of 3052	1204	internets.exe	76
PID 1204 wrote to memory of 3052	1204	internets.exe	76
PID 1204 wrote to memory of 3052	1204	internets.exe	76
PID 1204 wrote to memory of 3052	1204	internets.exe	76
PID 1204 wrote to memory of 2696	1204	internets.exe	77
PID 1204 wrote to memory of 2696	1204	internets.exe	77
PID 1204 wrote to memory of 2696	1204	internets.exe	77
PID 1204 wrote to memory of 2696	1204	internets.exe	77
PID 1204 wrote to memory of 2696	1204	internets.exe	77
PID 1204 wrote to memory of 2696	1204	internets.exe	77
PID 1204 wrote to memory of 2696	1204	internets.exe	77

C:\Users\Admin\AppData\Local\Temp\Due_Statement_00000010000100100002000000000000.exe
"C:\Users\Admin\AppData\Local\Temp\Due_Statement_00000010000100100002000000000000.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:640
- C:\Users\Admin\AppData\Local\Temp\Due_Statement_00000010000100100002000000000000.exe
  "C:\Users\Admin\AppData\Local\Temp\Due_Statement_00000010000100100002000000000000.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1256
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2368
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\Web\internets.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1520
    - - C:\Users\Admin\AppData\Local\Temp\Web\internets.exe
        
        C:\Users\Admin\AppData\Local\Temp\Web\internets.exe
        5⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of WriteProcessMemory
        
        PID:3860
      - C:\Users\Admin\AppData\Local\Temp\Web\internets.exe
        
        C:\Users\Admin\AppData\Local\Temp\Web\internets.exe
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:1204
        
        C:\Users\Admin\AppData\Local\Temp\Web\internets.exe
        
        C:\Users\Admin\AppData\Local\Temp\Web\internets.exe /stext "C:\Users\Admin\AppData\Local\Temp\maaql"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        
        PID:1732
        
        C:\Users\Admin\AppData\Local\Temp\Web\internets.exe
        
        C:\Users\Admin\AppData\Local\Temp\Web\internets.exe /stext "C:\Users\Admin\AppData\Local\Temp\xcnjmqgp"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3052
        
        C:\Users\Admin\AppData\Local\Temp\Web\internets.exe
        
        C:\Users\Admin\AppData\Local\Temp\Web\internets.exe /stext "C:\Users\Admin\AppData\Local\Temp\zwscmarrapr"
        7⤵
        Executes dropped EXE
        Accesses Microsoft Outlook accounts
        
        PID:2696

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/1204-139-0x00000000007B0000-0x0000000000829000-memory.dmp

Download

memory/1256-122-0x00000000007B0000-0x0000000000829000-memory.dmp

Download

memory/1256-117-0x00000000007B0000-0x0000000000829000-memory.dmp

Download

memory/1732-140-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/1732-152-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/1732-144-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/2696-148-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/2696-151-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/2696-154-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/3052-147-0x0000000000400000-0x0000000000424000-memory.dmp

Download

memory/3052-143-0x0000000000400000-0x0000000000424000-memory.dmp

Download

memory/3052-153-0x0000000000400000-0x0000000000424000-memory.dmp

Download