remcos | 7e14eac3878e56172746c4ce61a41938ee6ddb571721682db462d31e8810a0c9

Analysis

max time kernel
140s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19/10/2024, 09:03

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General

Target

20.exe
Size

469KB
MD5

da31b3ac7c6dbdc7cff96b4a1e3184b6
SHA1

4dc91cbb417c7ede59aef8cd7b160b0e1859a8ef
SHA256

f5087001c6a93bb8ee4871dab150715e4e5050ea6b4b39e201d9944f598a4549
SHA512

3364db57258bc63da9eea0d1592f387935eae74d69fb0d8f278868484e60af36ab5535d292ec492311119e20df0a1515d879444781ed96148fca26284a595d93
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS7n9:uiLJbpI7I2WhQqZ779

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

core-hook.gl.at.ply.gg:7242

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
scvhost.exe
copy_folder
files
delete_file
true
hide_file
true
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-WMI44A
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
scvhost
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

UAC bypass 3 TTPs 2 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	scvhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\scvhost = "\"C:\\ProgramData\\files\\scvhost.exe\""	scvhost.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	20.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\scvhost = "\"C:\\ProgramData\\files\\scvhost.exe\""	20.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	20.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
4036	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
668	scvhost.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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\files\\scvhost.exe\""	20.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\files\\scvhost.exe\""	20.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\files\\scvhost.exe\""	scvhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\files\\scvhost.exe\""	scvhost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 668 set thread context of 4548	668	scvhost.exe	95

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	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scvhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	20.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

pid	Process
4284	reg.exe
1504	reg.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
668	scvhost.exe
668	scvhost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
668	scvhost.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2208	2976	20.exe	84
PID 2976 wrote to memory of 2208	2976	20.exe	84
PID 2976 wrote to memory of 2208	2976	20.exe	84
PID 2208 wrote to memory of 4284	2208	cmd.exe	86
PID 2208 wrote to memory of 4284	2208	cmd.exe	86
PID 2208 wrote to memory of 4284	2208	cmd.exe	86
PID 2976 wrote to memory of 4036	2976	20.exe	89
PID 2976 wrote to memory of 4036	2976	20.exe	89
PID 2976 wrote to memory of 4036	2976	20.exe	89
PID 4036 wrote to memory of 4560	4036	WScript.exe	91
PID 4036 wrote to memory of 4560	4036	WScript.exe	91
PID 4036 wrote to memory of 4560	4036	WScript.exe	91
PID 4560 wrote to memory of 668	4560	cmd.exe	93
PID 4560 wrote to memory of 668	4560	cmd.exe	93
PID 4560 wrote to memory of 668	4560	cmd.exe	93
PID 668 wrote to memory of 432	668	scvhost.exe	94
PID 668 wrote to memory of 432	668	scvhost.exe	94
PID 668 wrote to memory of 432	668	scvhost.exe	94
PID 668 wrote to memory of 4548	668	scvhost.exe	95
PID 668 wrote to memory of 4548	668	scvhost.exe	95
PID 668 wrote to memory of 4548	668	scvhost.exe	95
PID 668 wrote to memory of 4548	668	scvhost.exe	95
PID 432 wrote to memory of 1504	432	cmd.exe	97
PID 432 wrote to memory of 1504	432	cmd.exe	97
PID 432 wrote to memory of 1504	432	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\20.exe
"C:\Users\Admin\AppData\Local\Temp\20.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2976
- C:\Windows\SysWOW64\cmd.exe
  /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2208
- - C:\Windows\SysWOW64\reg.exe
    C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:4284
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4036
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\files\scvhost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4560
  - - C:\ProgramData\files\scvhost.exe
      C:\ProgramData\files\scvhost.exe
      4⤵
      Adds policy Run key to start application
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:668
    - - C:\Windows\SysWOW64\cmd.exe
        
        /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:432
      - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        6⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:1504
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        
        PID:4548

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

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\files\scvhost.exe

Filesize
469KB

MD5
da31b3ac7c6dbdc7cff96b4a1e3184b6

SHA1
4dc91cbb417c7ede59aef8cd7b160b0e1859a8ef

SHA256
f5087001c6a93bb8ee4871dab150715e4e5050ea6b4b39e201d9944f598a4549

SHA512
3364db57258bc63da9eea0d1592f387935eae74d69fb0d8f278868484e60af36ab5535d292ec492311119e20df0a1515d879444781ed96148fca26284a595d93

Download Submit
C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
502B

MD5
b7815a869322588f698d6e86512f23d8

SHA1
4dc9f8526a60e74a34a585b441d96d92f8964652

SHA256
df8487ab6568d9400d7ba903eaeb0291d80313b617553ceb5f64306fb61e87b1

SHA512
c2b7933cb82d7a234390ccbb853fec0bd32d6bbadb9686c1b1e90146106235d6dbb3390342d1566f204d7cef741e7cdbde7d7a2e6dd040eaab1dc58007c4c458

Download Submit
memory/4548-9-0x0000000001300000-0x000000000137F000-memory.dmp

Filesize
508KB

Download
memory/4548-10-0x0000000001300000-0x000000000137F000-memory.dmp

Filesize
508KB

Download