remcos | 68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

Analysis

max time kernel
149s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27-09-2024 22:24

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General

Target

68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
Size

881KB
MD5

7afd5be4b77090388ddecb8169cf0bc3
SHA1

d3b6ba2e53aed1471c12196c577b7be56d14cf2f
SHA256

68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036
SHA512

2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06
SSDEEP

24576:VE8AE9lxicGLP0CDyB/1FNlUcDos713jb:VExsxiTVe1F/UcDosVb

Score

10^/10

remcos irn discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

IRN

irnserv1.ddns.net:4424

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
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-CA8761
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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1904	powershell.exe
2824	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
772	remcos.exe
2900	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
2768	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2280 set thread context of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 772 set thread context of 2900	772	remcos.exe	41

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 8 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	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2836	schtasks.exe
820	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
2824	powershell.exe
1904	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
Token: SeDebugPrivilege	2824	powershell.exe
Token: SeDebugPrivilege	1904	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2900	remcos.exe

Suspicious use of WriteProcessMemory 50 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2824	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	30
PID 2280 wrote to memory of 2824	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	30
PID 2280 wrote to memory of 2824	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	30
PID 2280 wrote to memory of 2824	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	30
PID 2280 wrote to memory of 2836	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	31
PID 2280 wrote to memory of 2836	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	31
PID 2280 wrote to memory of 2836	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	31
PID 2280 wrote to memory of 2836	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	31
PID 2280 wrote to memory of 2596	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	34
PID 2280 wrote to memory of 2596	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	34
PID 2280 wrote to memory of 2596	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	34
PID 2280 wrote to memory of 2596	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	34
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2280 wrote to memory of 2768	2280	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	35
PID 2768 wrote to memory of 772	2768	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	36
PID 2768 wrote to memory of 772	2768	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	36
PID 2768 wrote to memory of 772	2768	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	36
PID 2768 wrote to memory of 772	2768	68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe	36
PID 772 wrote to memory of 1904	772	remcos.exe	37
PID 772 wrote to memory of 1904	772	remcos.exe	37
PID 772 wrote to memory of 1904	772	remcos.exe	37
PID 772 wrote to memory of 1904	772	remcos.exe	37
PID 772 wrote to memory of 820	772	remcos.exe	39
PID 772 wrote to memory of 820	772	remcos.exe	39
PID 772 wrote to memory of 820	772	remcos.exe	39
PID 772 wrote to memory of 820	772	remcos.exe	39
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41
PID 772 wrote to memory of 2900	772	remcos.exe	41

C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
"C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2824
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp86BD.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2836
- C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
  "C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe"
  2⤵
  PID:2596
- C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe
  "C:\Users\Admin\AppData\Local\Temp\68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2768
- - C:\ProgramData\Remcos\remcos.exe
    "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:772
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1904
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB819.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:820
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:2900

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Remcos\logs.dat

Filesize
144B

MD5
50919a2541fc76eaca4aec72933dca20

SHA1
23495b54b5e14575c48393728c5a3ab103964bef

SHA256
8220c13abb274d108929b47d57a83f7cfde82f7db8356d7fdd5f3d3ebe1472dc

SHA512
e4cca91a88ab69a861525bed99acc298fe8f4a196ec6e067db7f22dd69d8e9129ee77cfa2b64a606ddbb5cc495eeba728b5536f23299d3c25f7b79fc9ca07af2

Download Submit
C:\ProgramData\Remcos\remcos.exe

Filesize
881KB

MD5
7afd5be4b77090388ddecb8169cf0bc3

SHA1
d3b6ba2e53aed1471c12196c577b7be56d14cf2f

SHA256
68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

SHA512
2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp86BD.tmp

Filesize
1KB

MD5
62dd6f16a545e10447bdff1eefae9310

SHA1
de23db82c4e5389dbc5c93f2c02b219dad2af243

SHA256
dc57a8f3a39059e895dfab5266fa0852b89856deaf17ef5f5a475ba18ee3f4e8

SHA512
c8484f29e215e3aad373f6f0f2ae49aa348c66d813ec253732900b678369a6425658a0750e48212561eff2fea22838194827e34778dfb2c55eb23131e09d9099

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
9c8a629f0e7547440bf5fb1c15ef45c6

SHA1
e306eb14e1a1d248d44902fd070cd60ce8ba5ed4

SHA256
0a2f71336d112becf25b988f20e2fe8daf706e2094f5aea1bc965a3c9b5a569d

SHA512
fc4be5d449086bafe7ced7e4f6161dc090b525dfa823fb5c18afc5b9e8f1fc332e4ba207e8ff001d69c0e161af4803e2b6349e4b08b227e0b896f0a26b295a2d

Download Submit
memory/772-41-0x0000000001050000-0x0000000001132000-memory.dmp

Filesize
904KB

Download
memory/2280-31-0x0000000074420000-0x0000000074B0E000-memory.dmp

Filesize
6.9MB

Download
memory/2280-3-0x0000000000340000-0x0000000000350000-memory.dmp

Filesize
64KB

Download
memory/2280-1-0x00000000000C0000-0x00000000001A2000-memory.dmp

Filesize
904KB

Download
memory/2280-2-0x0000000074420000-0x0000000074B0E000-memory.dmp

Filesize
6.9MB

Download
memory/2280-6-0x0000000005840000-0x0000000005900000-memory.dmp

Filesize
768KB

Download
memory/2280-0-0x000000007442E000-0x000000007442F000-memory.dmp

Filesize
4KB

Download
memory/2280-5-0x0000000074420000-0x0000000074B0E000-memory.dmp

Filesize
6.9MB

Download
memory/2280-4-0x000000007442E000-0x000000007442F000-memory.dmp

Filesize
4KB

Download
memory/2768-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2768-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2768-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2900-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2900-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2900-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2900-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download