remcos | 2e01a38518327e49082e2a07468320a453f1814644763f25c36a78dd6848697a

Analysis

max time kernel
149s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2024, 07:10

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General

Target

TNT invoice 9.30.2024.exe
Size

1017KB
MD5

673d693b0c8b68503d64ed15fd863d61
SHA1

4fb6b11e933354b9f7c5bda096543a5d6b56ff83
SHA256

a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4
SHA512

3996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27
SSDEEP

24576:myN887MU2cPnNupjbW/5OheoofVmhGmfCtquly:myNVQUPNudihOhRdhHIqul

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
3808	powershell.exe
1512	powershell.exe

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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	TNT invoice 9.30.2024.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	TNT invoice 9.30.2024.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	remcos.exe

Executes dropped EXE 3 IoCs

pid	Process
4800	remcos.exe
4640	remcos.exe
2380	remcos.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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	TNT invoice 9.30.2024.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	TNT invoice 9.30.2024.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\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 4948 set thread context of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4800 set thread context of 2380	4800	remcos.exe	102

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	TNT invoice 9.30.2024.exe
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	TNT invoice 9.30.2024.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
1420	schtasks.exe
1448	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3808	powershell.exe
3808	powershell.exe
1512	powershell.exe
4800	remcos.exe
4800	remcos.exe
1512	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3808	powershell.exe
Token: SeDebugPrivilege	1512	powershell.exe
Token: SeDebugPrivilege	4800	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2380	remcos.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 3808	4948	TNT invoice 9.30.2024.exe	91
PID 4948 wrote to memory of 3808	4948	TNT invoice 9.30.2024.exe	91
PID 4948 wrote to memory of 3808	4948	TNT invoice 9.30.2024.exe	91
PID 4948 wrote to memory of 1420	4948	TNT invoice 9.30.2024.exe	93
PID 4948 wrote to memory of 1420	4948	TNT invoice 9.30.2024.exe	93
PID 4948 wrote to memory of 1420	4948	TNT invoice 9.30.2024.exe	93
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 4948 wrote to memory of 2692	4948	TNT invoice 9.30.2024.exe	95
PID 2692 wrote to memory of 4800	2692	TNT invoice 9.30.2024.exe	96
PID 2692 wrote to memory of 4800	2692	TNT invoice 9.30.2024.exe	96
PID 2692 wrote to memory of 4800	2692	TNT invoice 9.30.2024.exe	96
PID 4800 wrote to memory of 1512	4800	remcos.exe	97
PID 4800 wrote to memory of 1512	4800	remcos.exe	97
PID 4800 wrote to memory of 1512	4800	remcos.exe	97
PID 4800 wrote to memory of 1448	4800	remcos.exe	99
PID 4800 wrote to memory of 1448	4800	remcos.exe	99
PID 4800 wrote to memory of 1448	4800	remcos.exe	99
PID 4800 wrote to memory of 4640	4800	remcos.exe	101
PID 4800 wrote to memory of 4640	4800	remcos.exe	101
PID 4800 wrote to memory of 4640	4800	remcos.exe	101
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102
PID 4800 wrote to memory of 2380	4800	remcos.exe	102

C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.30.2024.exe
"C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.30.2024.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mDBLQPaU.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3808
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF81B.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1420
- C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.30.2024.exe
  "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.30.2024.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2692
- - C:\ProgramData\Remcos\remcos.exe
    "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - 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:4800
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mDBLQPaU.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1512
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2CA9.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1448
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      PID:4640
  - - 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:2380

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

Query Registry

T1012

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
5d903ca4fb7c9dc301d111c98827860b

SHA1
50efa073a6d7fed9f0479dc9f720f665aa815860

SHA256
a62c5f08944cdc7e5e4e730d5e2fa123fd5704e54ef65f995a59bbc92e43282e

SHA512
8e663a27ae80f72f6c3a14871af1efce1a9f5bf5d31acfc5531ce28ff6e9b8f9eba871294741a6195e53710aa6f239db31d522ee926f98703a03a4fee0c90852

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

Filesize
1017KB

MD5
673d693b0c8b68503d64ed15fd863d61

SHA1
4fb6b11e933354b9f7c5bda096543a5d6b56ff83

SHA256
a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4

SHA512
3996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
213309e0c7df928c489ab8e27f641d50

SHA1
eb87b257eada34b6b9be37c7f637f0ce1285b475

SHA256
57759eaacaae106dcfe8cf4fdeedb99273d87d922cb1d0f4a7ddfdcefb38e9e4

SHA512
bfbbbb0c3ffae092e02d231ec91de93582e320797027fa9fbe32bce6ad18f00902becbb193c508ef7d2d9c0e3f619e71d7b004660b973f1039eebb5eaaa1536a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1xaco2wr.2xh.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF81B.tmp

Filesize
1KB

MD5
9b60a993d2a2e887611bcaf622672d4d

SHA1
d7f81a31ab58bcfc1e3cffd988715d17e6149731

SHA256
ca98d5fb297391398486d4ebdde189d0fe72e4ab1806120556f5db67987a6d20

SHA512
85f8d16b395ac1e28f7e30b34b50c19cd2d3bfcf09122dcb75cee8608047530d706eb14fff47d96c671beb09d7ea1d5257c0c447329c77f5ac50deb75e80dc2a

Download Submit
memory/1512-91-0x0000000005FC0000-0x0000000006314000-memory.dmp

Filesize
3.3MB

Download
memory/1512-103-0x00000000731F0000-0x000000007323C000-memory.dmp

Filesize
304KB

Download
memory/1512-115-0x0000000007960000-0x0000000007974000-memory.dmp

Filesize
80KB

Download
memory/1512-114-0x0000000007930000-0x0000000007941000-memory.dmp

Filesize
68KB

Download
memory/1512-102-0x0000000006420000-0x000000000646C000-memory.dmp

Filesize
304KB

Download
memory/1512-113-0x0000000007620000-0x00000000076C3000-memory.dmp

Filesize
652KB

Download
memory/2380-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2380-99-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2380-96-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2692-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2692-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2692-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2692-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2692-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3808-25-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3808-71-0x00000000076D0000-0x00000000076E1000-memory.dmp

Filesize
68KB

Download
memory/3808-28-0x0000000005AA0000-0x0000000005B06000-memory.dmp

Filesize
408KB

Download
memory/3808-15-0x00000000028E0000-0x0000000002916000-memory.dmp

Filesize
216KB

Download
memory/3808-27-0x0000000005A00000-0x0000000005A22000-memory.dmp

Filesize
136KB

Download
memory/3808-18-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3808-17-0x00000000053D0000-0x00000000059F8000-memory.dmp

Filesize
6.2MB

Download
memory/3808-40-0x0000000005B80000-0x0000000005ED4000-memory.dmp

Filesize
3.3MB

Download
memory/3808-19-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/3808-52-0x00000000061B0000-0x00000000061CE000-memory.dmp

Filesize
120KB

Download
memory/3808-53-0x0000000006240000-0x000000000628C000-memory.dmp

Filesize
304KB

Download
memory/3808-54-0x0000000006780000-0x00000000067B2000-memory.dmp

Filesize
200KB

Download
memory/3808-66-0x0000000007390000-0x0000000007433000-memory.dmp

Filesize
652KB

Download
memory/3808-65-0x0000000006760000-0x000000000677E000-memory.dmp

Filesize
120KB

Download
memory/3808-55-0x0000000071E40000-0x0000000071E8C000-memory.dmp

Filesize
304KB

Download
memory/3808-68-0x00000000074D0000-0x00000000074EA000-memory.dmp

Filesize
104KB

Download
memory/3808-67-0x0000000007B10000-0x000000000818A000-memory.dmp

Filesize
6.5MB

Download
memory/3808-69-0x0000000007540000-0x000000000754A000-memory.dmp

Filesize
40KB

Download
memory/3808-70-0x0000000007750000-0x00000000077E6000-memory.dmp

Filesize
600KB

Download
memory/3808-29-0x0000000005B10000-0x0000000005B76000-memory.dmp

Filesize
408KB

Download
memory/3808-72-0x0000000007700000-0x000000000770E000-memory.dmp

Filesize
56KB

Download
memory/3808-73-0x0000000007710000-0x0000000007724000-memory.dmp

Filesize
80KB

Download
memory/3808-74-0x0000000007810000-0x000000000782A000-memory.dmp

Filesize
104KB

Download
memory/3808-75-0x00000000077F0000-0x00000000077F8000-memory.dmp

Filesize
32KB

Download
memory/3808-78-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/4948-7-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/4948-6-0x0000000005920000-0x000000000593E000-memory.dmp

Filesize
120KB

Download
memory/4948-5-0x00000000054F0000-0x00000000054FA000-memory.dmp

Filesize
40KB

Download
memory/4948-4-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/4948-3-0x0000000005510000-0x00000000055A2000-memory.dmp

Filesize
584KB

Download
memory/4948-2-0x0000000005AC0000-0x0000000006064000-memory.dmp

Filesize
5.6MB

Download
memory/4948-1-0x0000000000A30000-0x0000000000B34000-memory.dmp

Filesize
1.0MB

Download
memory/4948-0-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/4948-8-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/4948-9-0x00000000094E0000-0x00000000095A0000-memory.dmp

Filesize
768KB

Download
memory/4948-10-0x000000000C640000-0x000000000C6DC000-memory.dmp

Filesize
624KB

Download
memory/4948-30-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download