remcos | 345c76d39f1b71665c9ad3c4dbef1aee57e25d0b181c19c6e5d0116fce6e86ef

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-12-2024 14:33

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General

Target

345c76d39f1b71665c9ad3c4dbef1aee57e25d0b181c19c6e5d0116fce6e86ef.dll
Size

45.1MB
MD5

c5004029bda5e7dd3d59b4e7e26475f3
SHA1

8bd081c690d362935df0202833aa9d029fc8f986
SHA256

345c76d39f1b71665c9ad3c4dbef1aee57e25d0b181c19c6e5d0116fce6e86ef
SHA512

8bd95c3e607a65237fa3d5af655ceab2f344da92d0f2f7e42d04858dc8027215ebce92a46925235fd8889b92c9c561fe69e49ae9713df360049f77ec08c265fc
SSDEEP

786432:sUP7GCGO7t0Srkx/tC0SzIdSwh/WxbpNHQD3trzRph:sUP7GCG6iSrkx1hSzYsHQD3t/Rf

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

pattreon.duckdns.org:7035

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-US2YEL
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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*LoopholeTu = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\TorretIff.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

regsvr32.exe

pid	Process
2880	regsvr32.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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:

regsvr32.exeregsvr32.execmd.exereg.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

regsvr32.exeregsvr32.execmd.exe

description	pid	Process	procid_target
PID 4508 wrote to memory of 2880	4508	regsvr32.exe	82
PID 4508 wrote to memory of 2880	4508	regsvr32.exe	82
PID 4508 wrote to memory of 2880	4508	regsvr32.exe	82
PID 2880 wrote to memory of 4188	2880	regsvr32.exe	88
PID 2880 wrote to memory of 4188	2880	regsvr32.exe	88
PID 2880 wrote to memory of 4188	2880	regsvr32.exe	88
PID 2880 wrote to memory of 4188	2880	regsvr32.exe	88
PID 2880 wrote to memory of 4188	2880	regsvr32.exe	88
PID 2880 wrote to memory of 4188	2880	regsvr32.exe	88
PID 2880 wrote to memory of 3188	2880	regsvr32.exe	91
PID 2880 wrote to memory of 3188	2880	regsvr32.exe	91
PID 2880 wrote to memory of 3188	2880	regsvr32.exe	91
PID 3188 wrote to memory of 4684	3188	cmd.exe	93
PID 3188 wrote to memory of 4684	3188	cmd.exe	93
PID 3188 wrote to memory of 4684	3188	cmd.exe	93

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\345c76d39f1b71665c9ad3c4dbef1aee57e25d0b181c19c6e5d0116fce6e86ef.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4508
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\345c76d39f1b71665c9ad3c4dbef1aee57e25d0b181c19c6e5d0116fce6e86ef.dll
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2880
- - C:\Windows\SysWOW64\regsvr32.exe
    "C:\Windows\SysWOW64\regsvr32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4188
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*LoopholeTu" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\TorretIff.dll",EntryPoint /f & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3188
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*LoopholeTu" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\TorretIff.dll",EntryPoint /f
      4⤵
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:4684

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2880-1-0x00000000102E6000-0x0000000010300000-memory.dmp

Filesize
104KB

Download
memory/2880-0-0x0000000010000000-0x0000000012DD6000-memory.dmp

Filesize
45.8MB

Download
memory/2880-10-0x0000000010000000-0x0000000012DD6000-memory.dmp

Filesize
45.8MB

Download
memory/2880-16-0x0000000012D6E000-0x0000000012D76000-memory.dmp

Filesize
32KB

Download
memory/2880-18-0x00000000102E6000-0x0000000010300000-memory.dmp

Filesize
104KB

Download
memory/4188-6-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-5-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-8-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-2-0x00000000005E0000-0x00000000005E1000-memory.dmp

Filesize
4KB

Download
memory/4188-9-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-11-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-12-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-13-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-14-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-15-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-17-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-19-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-20-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-21-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-22-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-23-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-24-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-25-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-26-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-27-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-28-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-29-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-30-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-31-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-32-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-33-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-34-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-35-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-36-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-37-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-38-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-39-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-40-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-41-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-42-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-43-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-44-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-45-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-46-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-47-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-48-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-49-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-50-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-51-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-52-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-53-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-54-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-55-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-56-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-57-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-58-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-59-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-60-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-61-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-62-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-63-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-64-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-65-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-66-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-67-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download
memory/4188-68-0x0000000000550000-0x00000000005D2000-memory.dmp

Filesize
520KB

Download