remcos | a87c27d613d16ecdc66c26d338c834c9b721e544b702b00b8a0728806ff77086

Analysis

max time kernel
149s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-12-2024 22:09

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General

Target

Shipping Document PL& BL 00980 ,pdf.exe
Size

902KB
MD5

1a5c59aeb8ec99b73bc89056e63805c0
SHA1

25602dcef8fb46b22e954f225483f3e3617a0261
SHA256

3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda
SHA512

a021ff6a08bf44ec06c8e884d2dca83eb161a86e8a8b638a19274e8900746a63a8219271f030c336eb3db61d8765da60a853a21785ef35ec4314f81bcd130a6c
SSDEEP

12288:2HsJlkbMylWnvSx/KG3EaXZK2bq5RILVO1Y+LG9hSmfE:+eCQZvq939ZM5RIqYTm6

Score

10^/10

remcos ngozi2021 discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.7.2 Pro

Botnet

NGOZI2021

favour2021.ddns.net:1990

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-EW6A42
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
wikipedia;solitaire;

Signatures

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

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral2/memory/1208-8-0x0000000005B20000-0x0000000005B38000-memory.dmp	net_reactor

Checks computer location settings 2 TTPs 4 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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	remcos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	Shipping Document PL& BL 00980 ,pdf.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	Shipping Document PL& BL 00980 ,pdf.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
3444	remcos.exe
4596	remcos.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	Shipping Document PL& BL 00980 ,pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1208 set thread context of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 3444 set thread context of 4596	3444	remcos.exe	100

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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.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	Shipping Document PL& BL 00980 ,pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Shipping Document PL& BL 00980 ,pdf.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1208	Shipping Document PL& BL 00980 ,pdf.exe
3132	Shipping Document PL& BL 00980 ,pdf.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\Local Settings	Shipping Document PL& BL 00980 ,pdf.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
1272	schtasks.exe
4444	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1208	Shipping Document PL& BL 00980 ,pdf.exe
3444	remcos.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1208	Shipping Document PL& BL 00980 ,pdf.exe
Token: SeDebugPrivilege	3444	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4596	remcos.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1208 wrote to memory of 1272	1208	Shipping Document PL& BL 00980 ,pdf.exe	91
PID 1208 wrote to memory of 1272	1208	Shipping Document PL& BL 00980 ,pdf.exe	91
PID 1208 wrote to memory of 1272	1208	Shipping Document PL& BL 00980 ,pdf.exe	91
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 1208 wrote to memory of 3132	1208	Shipping Document PL& BL 00980 ,pdf.exe	93
PID 3132 wrote to memory of 876	3132	Shipping Document PL& BL 00980 ,pdf.exe	94
PID 3132 wrote to memory of 876	3132	Shipping Document PL& BL 00980 ,pdf.exe	94
PID 3132 wrote to memory of 876	3132	Shipping Document PL& BL 00980 ,pdf.exe	94
PID 876 wrote to memory of 4552	876	WScript.exe	95
PID 876 wrote to memory of 4552	876	WScript.exe	95
PID 876 wrote to memory of 4552	876	WScript.exe	95
PID 4552 wrote to memory of 3444	4552	cmd.exe	97
PID 4552 wrote to memory of 3444	4552	cmd.exe	97
PID 4552 wrote to memory of 3444	4552	cmd.exe	97
PID 3444 wrote to memory of 4444	3444	remcos.exe	98
PID 3444 wrote to memory of 4444	3444	remcos.exe	98
PID 3444 wrote to memory of 4444	3444	remcos.exe	98
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100
PID 3444 wrote to memory of 4596	3444	remcos.exe	100

C:\Users\Admin\AppData\Local\Temp\Shipping Document PL& BL 00980 ,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Shipping Document PL& BL 00980 ,pdf.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IdXhNheuy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9805.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1272
- C:\Users\Admin\AppData\Local\Temp\Shipping Document PL& BL 00980 ,pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Shipping Document PL& BL 00980 ,pdf.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3132
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:876
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4552
    - - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        5⤵
        Checks computer location settings
        Executes dropped EXE
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:3444
      - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\IdXhNheuy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9EE6.tmp"
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:4444
      - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:4596

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
418B

MD5
b92d64fe5b1d1f59df4b738262aea8df

SHA1
c8fb1981759c2d9bb2ec91b705985fba5fc7af63

SHA256
fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

SHA512
2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9805.tmp

Filesize
1KB

MD5
19ae105f80be229519fcdb536ce0ec62

SHA1
59f80dce1fdc73d31b633ff83019a48bb2061830

SHA256
10c8c07c0d563b7cd1bd19ea0b64089530170855a02cd8136cefa1fae46f67ee

SHA512
93e03af1e4fc70c0de114c386f498c00643de1410995beb513ca902728a4a806b562b5159251a1760ad65c53cee33393cbad133127acdbdd2d82878864b16d52

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe

Filesize
902KB

MD5
1a5c59aeb8ec99b73bc89056e63805c0

SHA1
25602dcef8fb46b22e954f225483f3e3617a0261

SHA256
3b1b352f3c4d0fe235b45d9db418e1e4155ab31265ee368ed646ac38071a2eda

SHA512
a021ff6a08bf44ec06c8e884d2dca83eb161a86e8a8b638a19274e8900746a63a8219271f030c336eb3db61d8765da60a853a21785ef35ec4314f81bcd130a6c

Download Submit
memory/1208-2-0x0000000005830000-0x00000000058CC000-memory.dmp

Filesize
624KB

Download
memory/1208-4-0x0000000005970000-0x0000000005A02000-memory.dmp

Filesize
584KB

Download
memory/1208-1-0x0000000000EC0000-0x0000000000FA8000-memory.dmp

Filesize
928KB

Download
memory/1208-6-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download
memory/1208-7-0x0000000005C80000-0x0000000005CD6000-memory.dmp

Filesize
344KB

Download
memory/1208-24-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download
memory/1208-9-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/1208-10-0x00000000749A0000-0x0000000075150000-memory.dmp

Filesize
7.7MB

Download
memory/1208-11-0x00000000069A0000-0x00000000069FE000-memory.dmp

Filesize
376KB

Download
memory/1208-0-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/1208-3-0x0000000005E80000-0x0000000006424000-memory.dmp

Filesize
5.6MB

Download
memory/1208-5-0x0000000005950000-0x000000000595A000-memory.dmp

Filesize
40KB

Download
memory/1208-8-0x0000000005B20000-0x0000000005B38000-memory.dmp

Filesize
96KB

Download
memory/3132-21-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3132-27-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3132-20-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3132-17-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4596-38-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4596-41-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4596-37-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4596-42-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4596-44-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4596-45-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download