remcos | f2993afe3bd724db151713c80ff4e2207e66f0ef4dacfa099f516573db2a9d62

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 09:21

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General

Target
W2_1040_drivers license/2023 Tax Organizer.exe
Size 5.5MB
Sample240514-lbtwvsae63
SHA256 a046e2108d61775633c225a45a4801f79592e7770ccb4aaf4da51882254d3fca
MD5 bc79e91265ac5cd74de7c35f0a7fd20c
SHA1 1d0d225846f571654afbf81937b728033211bf11
SHA512 4fc649e071870af00b3a8e36eb086f84f30cd162283e86286d5c0e52d5123cd581c72196a83010addba276fedcb59a3c851ac71483376e3eb10b1110898e6907
SSDEEP 98304:7MrZJgVmlhdyvWZCEirUMrvQrxe5zS31AGEDzwT4:jgUvzLoMrYdIDEc
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

faststaynow.duckdns.org:5057

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-0TC926
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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*crowdUpdater = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\crowdstrikeModule.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1120	2023 Tax Organizer.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 1088	1120	2023 Tax Organizer.exe	85
PID 1120 wrote to memory of 1088	1120	2023 Tax Organizer.exe	85
PID 1120 wrote to memory of 1088	1120	2023 Tax Organizer.exe	85
PID 1120 wrote to memory of 1088	1120	2023 Tax Organizer.exe	85
PID 1120 wrote to memory of 1088	1120	2023 Tax Organizer.exe	85
PID 1120 wrote to memory of 1088	1120	2023 Tax Organizer.exe	85
PID 1120 wrote to memory of 4092	1120	2023 Tax Organizer.exe	86
PID 1120 wrote to memory of 4092	1120	2023 Tax Organizer.exe	86
PID 1120 wrote to memory of 4092	1120	2023 Tax Organizer.exe	86
PID 4092 wrote to memory of 2580	4092	cmd.exe	88
PID 4092 wrote to memory of 2580	4092	cmd.exe	88
PID 4092 wrote to memory of 2580	4092	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\W2_1040_drivers license\2023 Tax Organizer.exe
"C:\Users\Admin\AppData\Local\Temp\W2_1040_drivers license\2023 Tax Organizer.exe"
1⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Users\Admin\AppData\Local\Temp\W2_1040_drivers license\2023 Tax Organizer.exe
  "C:\Users\Admin\AppData\Local\Temp\W2_1040_drivers license\2023 Tax Organizer.exe"
  2⤵
  PID:1088
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*crowdUpdater" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\crowdstrikeModule.dll",EntryPoint /f & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4092
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*crowdUpdater" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\crowdstrikeModule.dll",EntryPoint /f
    3⤵
    - Adds Run key to start application
    PID:2580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1088-15-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-24-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-27-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-4-0x00000000001C0000-0x00000000001C1000-memory.dmp

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memory/1088-9-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-10-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-8-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-7-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-26-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-25-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-16-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-14-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-23-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-17-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-22-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-18-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-19-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-20-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1088-21-0x00000000009A0000-0x0000000000A22000-memory.dmp

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memory/1120-0-0x0000000000400000-0x0000000000996000-memory.dmp

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memory/1120-2-0x00000000102E6000-0x0000000010300000-memory.dmp

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memory/1120-13-0x0000000012D6E000-0x0000000012D75000-memory.dmp

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memory/1120-11-0x0000000010000000-0x0000000012DD7000-memory.dmp

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memory/1120-6-0x0000000010000000-0x0000000012DD7000-memory.dmp

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memory/1120-1-0x0000000010000000-0x0000000012DD7000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads