remcos | f5277278370d2ba066b6c402183d0c4204a6367a6f92ef261e18b1c40484b92c

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05/11/2024, 19:42

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General

Target

8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe
Size

459KB
MD5

033b66b0c1a4f974258641e792de5dfc
SHA1

20f08d93900e5444d3d224a67680090445847a57
SHA256

8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b
SHA512

f5914c06f3c3ebdd1455fd09cebdc9b09a78b39f4bfbbe333e219b973abd6ac52076638ef701354dec7a3da75dceedf174759c1d63cb9aa21734d833d90cdc2d
SSDEEP

6144:aa4YiP1U/VOKRUz7mxE3oEhxv2gYnCLrbLM9iHul+jZ5mv9Qoj8lAOZZlvXI2FEF:aa4RU/U3AVE2gNrY9iH8+1YMfZlAjeG

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

3.3.0 Pro

Botnet

RemoteHost

178.20.44.131:2406

new.bingoroll20.net:2406

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
winerar.exe
copy_folder
Winerar
delete_file
true
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
pidronic-2CGLP3
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

Signatures

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

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	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Winerar\\winerar.exe\""	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	winerar.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Winerar\\winerar.exe\""	winerar.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
4092	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4472	winerar.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Winerar\\winerar.exe\""	winerar.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Winerar\\winerar.exe\""	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Winerar\\winerar.exe\""	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Winerar\\winerar.exe\""	winerar.exe

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 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.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	winerar.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2316 wrote to memory of 4092	2316	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe	88
PID 2316 wrote to memory of 4092	2316	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe	88
PID 2316 wrote to memory of 4092	2316	8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe	88
PID 4092 wrote to memory of 916	4092	WScript.exe	90
PID 4092 wrote to memory of 916	4092	WScript.exe	90
PID 4092 wrote to memory of 916	4092	WScript.exe	90
PID 916 wrote to memory of 4472	916	cmd.exe	92
PID 916 wrote to memory of 4472	916	cmd.exe	92
PID 916 wrote to memory of 4472	916	cmd.exe	92
PID 4472 wrote to memory of 2520	4472	winerar.exe	93
PID 4472 wrote to memory of 2520	4472	winerar.exe	93
PID 4472 wrote to memory of 1448	4472	winerar.exe	94
PID 4472 wrote to memory of 1448	4472	winerar.exe	94
PID 4472 wrote to memory of 1448	4472	winerar.exe	94

C:\Users\Admin\AppData\Local\Temp\8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.exe
"C:\Users\Admin\AppData\Local\Temp\8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b.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:2316
- 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:4092
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Winerar\winerar.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:916
  - - C:\Users\Admin\AppData\Roaming\Winerar\winerar.exe
      C:\Users\Admin\AppData\Roaming\Winerar\winerar.exe
      4⤵
      Adds policy Run key to start application
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4472
    - - \??\c:\program files\internet explorer\iexplore.exe
        
        "c:\program files\internet explorer\iexplore.exe"
        5⤵
        
        PID:2520
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        
        PID:1448

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

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:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
662B

MD5
b8a59bdc535f5405f01d7831d4fb86b6

SHA1
5911d0a60f70cecb8a158f484c69003ac31f0b20

SHA256
ad80d14909d72397edd93dd9305d3aa3591972210b2b0a314fa48a6fbde160ee

SHA512
31b5219507807d72899d1424ec68d7a65bb44ab4bcb1d1562c966ad9bde9df1d3615c2c315f0c56f06a404be8b5c1de0a4c97e28c100f04334c07ba74d7088a5

Download Submit
C:\Users\Admin\AppData\Roaming\Winerar\winerar.exe

Filesize
459KB

MD5
033b66b0c1a4f974258641e792de5dfc

SHA1
20f08d93900e5444d3d224a67680090445847a57

SHA256
8e2e5cfb4dc796e89cc792fbae884061b87c18494afa7dec02c92e5d46bd990b

SHA512
f5914c06f3c3ebdd1455fd09cebdc9b09a78b39f4bfbbe333e219b973abd6ac52076638ef701354dec7a3da75dceedf174759c1d63cb9aa21734d833d90cdc2d

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads