remcos | c66e049eaa0a385ba5caef7368c3a4a3948f5d8aa7834625f2078268e430aba8

Analysis

max time kernel
119s
max time network
118s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
09-09-2024 18:29

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General

Target

933175fbcc22497d4480e9e7f83024c0N.exe
Size

1.2MB
MD5

933175fbcc22497d4480e9e7f83024c0
SHA1

4dbb3132efb703420efa7836a9dd25cf6c71817e
SHA256

c66e049eaa0a385ba5caef7368c3a4a3948f5d8aa7834625f2078268e430aba8
SHA512

db417cf645400dc430047439a79bb53cebbfad1d5eecf370fd378da63dedbd92250a789c1015dac0d7800273796e9891dfde9194b715195b37be3a91e313d101
SSDEEP

24576:01x4znML6UaPV7LAdK3rWnpgDyt4+3rTdJDrvAoOPUFApaV:0PMnML6vd7LAdK3wgr+ndFrKBM

Score

10^/10

remcos aug 13 collection credential_access discovery execution rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

Aug 13

method8888.ddns.net:6902

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-SYI1YB
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/696-59-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/480-58-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1908-61-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/696-59-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1908-61-0x0000000000400000-0x0000000000478000-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
2564	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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	933175fbcc22497d4480e9e7f83024c0N.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2660 set thread context of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2184 set thread context of 1908	2184	933175fbcc22497d4480e9e7f83024c0N.exe	36
PID 2184 set thread context of 696	2184	933175fbcc22497d4480e9e7f83024c0N.exe	37
PID 2184 set thread context of 480	2184	933175fbcc22497d4480e9e7f83024c0N.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 7 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	933175fbcc22497d4480e9e7f83024c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	933175fbcc22497d4480e9e7f83024c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	933175fbcc22497d4480e9e7f83024c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	933175fbcc22497d4480e9e7f83024c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	933175fbcc22497d4480e9e7f83024c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2584	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2564	powershell.exe
1908	933175fbcc22497d4480e9e7f83024c0N.exe
1908	933175fbcc22497d4480e9e7f83024c0N.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2184	933175fbcc22497d4480e9e7f83024c0N.exe
2184	933175fbcc22497d4480e9e7f83024c0N.exe
2184	933175fbcc22497d4480e9e7f83024c0N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2564	powershell.exe
Token: SeDebugPrivilege	480	933175fbcc22497d4480e9e7f83024c0N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2184	933175fbcc22497d4480e9e7f83024c0N.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 2564	2660	933175fbcc22497d4480e9e7f83024c0N.exe	30
PID 2660 wrote to memory of 2564	2660	933175fbcc22497d4480e9e7f83024c0N.exe	30
PID 2660 wrote to memory of 2564	2660	933175fbcc22497d4480e9e7f83024c0N.exe	30
PID 2660 wrote to memory of 2564	2660	933175fbcc22497d4480e9e7f83024c0N.exe	30
PID 2660 wrote to memory of 2584	2660	933175fbcc22497d4480e9e7f83024c0N.exe	31
PID 2660 wrote to memory of 2584	2660	933175fbcc22497d4480e9e7f83024c0N.exe	31
PID 2660 wrote to memory of 2584	2660	933175fbcc22497d4480e9e7f83024c0N.exe	31
PID 2660 wrote to memory of 2584	2660	933175fbcc22497d4480e9e7f83024c0N.exe	31
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2660 wrote to memory of 2184	2660	933175fbcc22497d4480e9e7f83024c0N.exe	34
PID 2184 wrote to memory of 1908	2184	933175fbcc22497d4480e9e7f83024c0N.exe	36
PID 2184 wrote to memory of 1908	2184	933175fbcc22497d4480e9e7f83024c0N.exe	36
PID 2184 wrote to memory of 1908	2184	933175fbcc22497d4480e9e7f83024c0N.exe	36
PID 2184 wrote to memory of 1908	2184	933175fbcc22497d4480e9e7f83024c0N.exe	36
PID 2184 wrote to memory of 1908	2184	933175fbcc22497d4480e9e7f83024c0N.exe	36
PID 2184 wrote to memory of 696	2184	933175fbcc22497d4480e9e7f83024c0N.exe	37
PID 2184 wrote to memory of 696	2184	933175fbcc22497d4480e9e7f83024c0N.exe	37
PID 2184 wrote to memory of 696	2184	933175fbcc22497d4480e9e7f83024c0N.exe	37
PID 2184 wrote to memory of 696	2184	933175fbcc22497d4480e9e7f83024c0N.exe	37
PID 2184 wrote to memory of 696	2184	933175fbcc22497d4480e9e7f83024c0N.exe	37
PID 2184 wrote to memory of 480	2184	933175fbcc22497d4480e9e7f83024c0N.exe	38
PID 2184 wrote to memory of 480	2184	933175fbcc22497d4480e9e7f83024c0N.exe	38
PID 2184 wrote to memory of 480	2184	933175fbcc22497d4480e9e7f83024c0N.exe	38
PID 2184 wrote to memory of 480	2184	933175fbcc22497d4480e9e7f83024c0N.exe	38
PID 2184 wrote to memory of 480	2184	933175fbcc22497d4480e9e7f83024c0N.exe	38

C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe
"C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\YLLHpOsQ.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2564
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YLLHpOsQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCCD1.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2584
- C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe
  "C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2184
- - C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe
    C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe /stext "C:\Users\Admin\AppData\Local\Temp\dzvilkkiamda"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1908
- - C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe
    C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe /stext "C:\Users\Admin\AppData\Local\Temp\fbaamcdjouwfmnh"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:696
- - C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe
    C:\Users\Admin\AppData\Local\Temp\933175fbcc22497d4480e9e7f83024c0N.exe /stext "C:\Users\Admin\AppData\Local\Temp\qvotmvodccojwtvwvz"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:480

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
bbd794526715821f6394d93c1fd2c3b4

SHA1
e509c9e24407a67e488e17172f9c69e781fbbf1b

SHA256
3db6de85d81f1c82c56b5253aa74cb20f7fc035a948c5ce4092a6093e0161608

SHA512
20b72fbc2826b9f1607caf5fd19ba1cb48324c03bc4c1b7c6db5435d02560f4b440953303cb601441463ee4d60fd6df540b22142c9966a18d8ec16c2d3b125ff

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCCD1.tmp

Filesize
1KB

MD5
670a722680bf43652b68db393ae96ef7

SHA1
36fadb82d1d4bbe7a6405f352d6d667c6e3fcfb8

SHA256
f22433fd4e852785d5e40c0baa6b895a95ebfdc05137d29d27879417549536e0

SHA512
d2f74514bc071adbfdd43d9a4c15e6d807236d34ae4217fb54e882e773d95bd79494bcc3c987bae075c6acb2a88d25b6f42d0d34ca3b36f758bf61ca2ccef9ae

Download Submit
memory/480-56-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/480-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/480-55-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/696-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/696-57-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/696-59-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1908-61-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1908-60-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1908-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2184-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2184-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-87-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-68-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2184-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2184-71-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2184-72-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2660-0-0x000000007421E000-0x000000007421F000-memory.dmp

Filesize
4KB

Download
memory/2660-2-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download
memory/2660-3-0x0000000000710000-0x000000000072E000-memory.dmp

Filesize
120KB

Download
memory/2660-4-0x000000007421E000-0x000000007421F000-memory.dmp

Filesize
4KB

Download
memory/2660-1-0x0000000000CA0000-0x0000000000DD6000-memory.dmp

Filesize
1.2MB

Download
memory/2660-5-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download
memory/2660-6-0x00000000004C0000-0x00000000004D6000-memory.dmp

Filesize
88KB

Download
memory/2660-7-0x000000000A0D0000-0x000000000A190000-memory.dmp

Filesize
768KB

Download
memory/2660-36-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download