remcos | cd1dbeedd93d1c0bf3c76a1e5cd2fd4cf1f0d195226dca32d85757301aba43b0

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
11/07/2024, 06:52

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
RS8RlKC3V8acct1190M2K,pdf.exe
Size 1.2MB
Sample240711-hm3flathnk
SHA256 cd1dbeedd93d1c0bf3c76a1e5cd2fd4cf1f0d195226dca32d85757301aba43b0
MD5 24a944104d4673c6ddb64b2ef5c6dd57
SHA1 6a528e32c5d676f5399de2141fb8ea31210bfb32
SHA512 4746f945e4dec15714a65764f00fc3af01631a1a05cdc9e8294cd7c2166b63e8d8983295c1eca46280929dcf952849f962aed4bf5c0a4ab27fe2daf350f076f2
SSDEEP 24576:J6nVMk+HIj90ckN5xxNtIVGmUuX8Ts0bydWy2UE43YP0b8LLuwPu8Xlc:8Vz7t+xkGzaUlPW2Lukud
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos nsppd evasion execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

nsppd

75.127.7.188:2404

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
F-11.exe
copy_folder
F-11
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
false
install_path
%WinDir%\System32
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
MUJ
keylog_path
%WinDir%\System32
mouse_option
false
mutex
Tpn-C0MW43
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 11 IoCs

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

execution

PowerShell

T1059.001

pid	Process
60	powershell.exe
2660	powershell.exe
1520	powershell.exe
4784	powershell.exe
4856	powershell.exe
4644	powershell.exe
3088	powershell.exe
404	powershell.exe
4712	powershell.exe
1328	powershell.exe
4024	powershell.exe

Disables Task Manager via registry modification
evasion

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	fhvnleke.dat
Key value queried	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	RS8RlKC3V8acct1190M2K,pdf.exe

Executes dropped EXE 2 IoCs

pid	Process
4904	fhvnleke.dat
4720	RegSvcs.exe

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "c:\\cchn\\FHVNLE~1.EXE c:\\cchn\\ncjehr.icm"	fhvnleke.dat

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\MUJ\logs.dat	RegSvcs.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4904 set thread context of 4720	4904	fhvnleke.dat	109

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2144	ipconfig.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000_Classes\Local Settings	RS8RlKC3V8acct1190M2K,pdf.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
60	powershell.exe
1328	powershell.exe
1328	powershell.exe
4024	powershell.exe
4024	powershell.exe
4644	powershell.exe
4644	powershell.exe
3088	powershell.exe
3088	powershell.exe
2660	powershell.exe
2660	powershell.exe
60	powershell.exe
60	powershell.exe
4644	powershell.exe
4024	powershell.exe
1328	powershell.exe
3088	powershell.exe
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
2660	powershell.exe
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat
4904	fhvnleke.dat

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	1328	powershell.exe
Token: SeDebugPrivilege	60	powershell.exe
Token: SeDebugPrivilege	4644	powershell.exe
Token: SeDebugPrivilege	3088	powershell.exe
Token: SeDebugPrivilege	4024	powershell.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	4784	powershell.exe
Token: SeDebugPrivilege	404	powershell.exe
Token: SeDebugPrivilege	4856	powershell.exe
Token: SeDebugPrivilege	1520	powershell.exe
Token: SeDebugPrivilege	4712	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4720	RegSvcs.exe

Suspicious use of WriteProcessMemory 59 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1288	1956	RS8RlKC3V8acct1190M2K,pdf.exe	86
PID 1956 wrote to memory of 1288	1956	RS8RlKC3V8acct1190M2K,pdf.exe	86
PID 1956 wrote to memory of 1288	1956	RS8RlKC3V8acct1190M2K,pdf.exe	86
PID 1288 wrote to memory of 4720	1288	WScript.exe	87
PID 1288 wrote to memory of 4720	1288	WScript.exe	87
PID 1288 wrote to memory of 4720	1288	WScript.exe	87
PID 1288 wrote to memory of 5044	1288	WScript.exe	88
PID 1288 wrote to memory of 5044	1288	WScript.exe	88
PID 1288 wrote to memory of 5044	1288	WScript.exe	88
PID 4720 wrote to memory of 2144	4720	cmd.exe	91
PID 4720 wrote to memory of 2144	4720	cmd.exe	91
PID 4720 wrote to memory of 2144	4720	cmd.exe	91
PID 5044 wrote to memory of 4904	5044	cmd.exe	92
PID 5044 wrote to memory of 4904	5044	cmd.exe	92
PID 5044 wrote to memory of 4904	5044	cmd.exe	92
PID 4904 wrote to memory of 4644	4904	fhvnleke.dat	93
PID 4904 wrote to memory of 4644	4904	fhvnleke.dat	93
PID 4904 wrote to memory of 4644	4904	fhvnleke.dat	93
PID 4904 wrote to memory of 3088	4904	fhvnleke.dat	95
PID 4904 wrote to memory of 3088	4904	fhvnleke.dat	95
PID 4904 wrote to memory of 3088	4904	fhvnleke.dat	95
PID 4904 wrote to memory of 60	4904	fhvnleke.dat	97
PID 4904 wrote to memory of 60	4904	fhvnleke.dat	97
PID 4904 wrote to memory of 60	4904	fhvnleke.dat	97
PID 4904 wrote to memory of 1328	4904	fhvnleke.dat	99
PID 4904 wrote to memory of 1328	4904	fhvnleke.dat	99
PID 4904 wrote to memory of 1328	4904	fhvnleke.dat	99
PID 4904 wrote to memory of 4024	4904	fhvnleke.dat	101
PID 4904 wrote to memory of 4024	4904	fhvnleke.dat	101
PID 4904 wrote to memory of 4024	4904	fhvnleke.dat	101
PID 4904 wrote to memory of 2660	4904	fhvnleke.dat	103
PID 4904 wrote to memory of 2660	4904	fhvnleke.dat	103
PID 4904 wrote to memory of 2660	4904	fhvnleke.dat	103
PID 1288 wrote to memory of 3948	1288	WScript.exe	105
PID 1288 wrote to memory of 3948	1288	WScript.exe	105
PID 1288 wrote to memory of 3948	1288	WScript.exe	105
PID 4904 wrote to memory of 3656	4904	fhvnleke.dat	107
PID 4904 wrote to memory of 3656	4904	fhvnleke.dat	107
PID 4904 wrote to memory of 3656	4904	fhvnleke.dat	107
PID 4904 wrote to memory of 4720	4904	fhvnleke.dat	109
PID 4904 wrote to memory of 4720	4904	fhvnleke.dat	109
PID 4904 wrote to memory of 4720	4904	fhvnleke.dat	109
PID 1328 wrote to memory of 404	1328	powershell.exe	110
PID 1328 wrote to memory of 404	1328	powershell.exe	110
PID 1328 wrote to memory of 404	1328	powershell.exe	110
PID 3088 wrote to memory of 1520	3088	powershell.exe	111
PID 3088 wrote to memory of 1520	3088	powershell.exe	111
PID 3088 wrote to memory of 1520	3088	powershell.exe	111
PID 4024 wrote to memory of 4784	4024	powershell.exe	112
PID 4024 wrote to memory of 4784	4024	powershell.exe	112
PID 4024 wrote to memory of 4784	4024	powershell.exe	112
PID 60 wrote to memory of 4856	60	powershell.exe	113
PID 60 wrote to memory of 4856	60	powershell.exe	113
PID 60 wrote to memory of 4856	60	powershell.exe	113
PID 4904 wrote to memory of 4720	4904	fhvnleke.dat	109
PID 2660 wrote to memory of 4712	2660	powershell.exe	114
PID 2660 wrote to memory of 4712	2660	powershell.exe	114
PID 2660 wrote to memory of 4712	2660	powershell.exe	114
PID 4904 wrote to memory of 4720	4904	fhvnleke.dat	109

C:\Users\Admin\AppData\Local\Temp\RS8RlKC3V8acct1190M2K,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\RS8RlKC3V8acct1190M2K,pdf.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\tckc.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:1288
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c ipconfig /release
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4720
  - - C:\Windows\SysWOW64\ipconfig.exe
      ipconfig /release
      4⤵
      Gathers network information
      PID:2144
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c fhvnleke.dat ncjehr.icm
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5044
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX0\fhvnleke.dat
      fhvnleke.dat ncjehr.icm
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:4904
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\RarSFX0
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4644
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionProcess 'RegSvcs.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:3088
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionProcess RegSvcs.exe
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:1520
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionExtension '.vbs'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:60
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionExtension .vbs
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:4856
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionExtension '.vbe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1328
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionExtension .vbe
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:404
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionExtension '*.vbs'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:4024
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionExtension *.vbs
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:4784
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionExtension '*.vbe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2660
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionExtension *.vbe
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:4712
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c schtasks /create /sc minute /mo 30 /tn WindowsRepaire /tr "c:\cchn\FHVNLE~1.EXE c:\cchn\ncjehr.icm"
        5⤵
        
        PID:3656
    - - C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
        
        "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
        5⤵
        Executes dropped EXE
        Drops file in System32 directory
        Suspicious use of SetWindowsHookEx
        
        PID:4720
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c ipconfig /renew
    3⤵
    PID:3948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...