remcos | 84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54

Analysis

max time kernel
118s
max time network
112s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-09-2024 17:47

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General

Target

e7da9da76702fefa71e67e7c2d67eb70N.exe
Size

953KB
MD5

e7da9da76702fefa71e67e7c2d67eb70
SHA1

c97603e9070393fa9bb56e8674512cde49bfe444
SHA256

84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54
SHA512

37a6f8be2cc4835a4bb15d5e4f86d1c9390cb94480642dfee08210640e679d694a8031fbd68d8ec1b84f8d4ff01ad33794562ec1456c262a4d10bc4fd483fd4c
SSDEEP

24576:B0R6OKfNjIxTUYFb5rTGx+Up4/r6HOzHEEg5d:eGfqV5t5rKTa/9HEV

Score

10^/10

remcos blvinc collection credential_access discovery execution rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

blvinc

blv23728.ddns.net:1973

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-NGC4XU
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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 3 IoCs

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

resource	yara_rule
behavioral1/memory/2760-50-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/772-52-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1952-51-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/772-52-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1952-51-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2852	powershell.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
T1552.001

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	e7da9da76702fefa71e67e7c2d67eb70N.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2792 set thread context of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2340 set thread context of 1952	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	35
PID 2340 set thread context of 772	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	37
PID 2340 set thread context of 2760	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	38

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 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e7da9da76702fefa71e67e7c2d67eb70N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e7da9da76702fefa71e67e7c2d67eb70N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e7da9da76702fefa71e67e7c2d67eb70N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e7da9da76702fefa71e67e7c2d67eb70N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e7da9da76702fefa71e67e7c2d67eb70N.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2852	powershell.exe
1952	e7da9da76702fefa71e67e7c2d67eb70N.exe
1952	e7da9da76702fefa71e67e7c2d67eb70N.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2340	e7da9da76702fefa71e67e7c2d67eb70N.exe
2340	e7da9da76702fefa71e67e7c2d67eb70N.exe
2340	e7da9da76702fefa71e67e7c2d67eb70N.exe
2340	e7da9da76702fefa71e67e7c2d67eb70N.exe
2340	e7da9da76702fefa71e67e7c2d67eb70N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2852	powershell.exe
Token: SeDebugPrivilege	2760	e7da9da76702fefa71e67e7c2d67eb70N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2340	e7da9da76702fefa71e67e7c2d67eb70N.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 2852	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	30
PID 2792 wrote to memory of 2852	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	30
PID 2792 wrote to memory of 2852	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	30
PID 2792 wrote to memory of 2852	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	30
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2792 wrote to memory of 2340	2792	e7da9da76702fefa71e67e7c2d67eb70N.exe	32
PID 2340 wrote to memory of 2276	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	34
PID 2340 wrote to memory of 2276	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	34
PID 2340 wrote to memory of 2276	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	34
PID 2340 wrote to memory of 2276	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	34
PID 2340 wrote to memory of 1952	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	35
PID 2340 wrote to memory of 1952	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	35
PID 2340 wrote to memory of 1952	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	35
PID 2340 wrote to memory of 1952	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	35
PID 2340 wrote to memory of 1952	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	35
PID 2340 wrote to memory of 1616	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	36
PID 2340 wrote to memory of 1616	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	36
PID 2340 wrote to memory of 1616	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	36
PID 2340 wrote to memory of 1616	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	36
PID 2340 wrote to memory of 772	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	37
PID 2340 wrote to memory of 772	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	37
PID 2340 wrote to memory of 772	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	37
PID 2340 wrote to memory of 772	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	37
PID 2340 wrote to memory of 772	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	37
PID 2340 wrote to memory of 2760	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	38
PID 2340 wrote to memory of 2760	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	38
PID 2340 wrote to memory of 2760	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	38
PID 2340 wrote to memory of 2760	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	38
PID 2340 wrote to memory of 2760	2340	e7da9da76702fefa71e67e7c2d67eb70N.exe	38

C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe
"C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2792
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2852
- C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe
  "C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2340
- - C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe
    C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe /stext "C:\Users\Admin\AppData\Local\Temp\opoyuxabsijdnmech"
    3⤵
    PID:2276
- - C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe
    C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe /stext "C:\Users\Admin\AppData\Local\Temp\opoyuxabsijdnmech"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1952
- - C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe
    C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe /stext "C:\Users\Admin\AppData\Local\Temp\yrtrvpsdgqbhpabgqwoq"
    3⤵
    PID:1616
- - C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe
    C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe /stext "C:\Users\Admin\AppData\Local\Temp\yrtrvpsdgqbhpabgqwoq"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:772
- - C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe
    C:\Users\Admin\AppData\Local\Temp\e7da9da76702fefa71e67e7c2d67eb70N.exe /stext "C:\Users\Admin\AppData\Local\Temp\alhcwhdwuytmagpkhgasubj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2760

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 Information Discovery

T1082

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

Loading Replay Monitor...

Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
ec60ca4dafa8da308145112e4e76889d

SHA1
082d40ef720184d82ffa3bdf595c380b711e79ca

SHA256
00e7c82268dff4eab814286070f4830d9c61024405dbc638cd82e2eca3458b59

SHA512
3e93bb0b32232186e9a736a1b54c5d45279c884d60e8e2f35faa0f157608b85ec9dcd209aa6f23a24bf1872da172362ff760532e062131ac425fa4d3a5b543c4

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/772-44-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/772-52-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/772-48-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1952-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1952-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1952-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2340-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-61-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2340-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2340-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-64-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2340-65-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2340-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2340-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-49-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2760-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2760-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2792-2-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2792-3-0x00000000004F0000-0x0000000000508000-memory.dmp

Filesize
96KB

Download
memory/2792-4-0x000000007465E000-0x000000007465F000-memory.dmp

Filesize
4KB

Download
memory/2792-5-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2792-1-0x0000000001160000-0x0000000001250000-memory.dmp

Filesize
960KB

Download
memory/2792-6-0x00000000050A0000-0x0000000005160000-memory.dmp

Filesize
768KB

Download
memory/2792-31-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/2792-0-0x000000007465E000-0x000000007465F000-memory.dmp

Filesize
4KB

Download