remcos | a72d8b61eaf5eb63dbf71fd2fdb64d2f51c0f9c9381ffff75c0aea44fafb6693

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
26-09-2024 07:54

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General

Target

TNT invoice 9.26.2024 .exe
Size

881KB
MD5

7afd5be4b77090388ddecb8169cf0bc3
SHA1

d3b6ba2e53aed1471c12196c577b7be56d14cf2f
SHA256

68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036
SHA512

2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06
SSDEEP

24576:VE8AE9lxicGLP0CDyB/1FNlUcDos713jb:VExsxiTVe1F/UcDosVb

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
4160	powershell.exe
1924	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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	TNT invoice 9.26.2024 .exe
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	TNT invoice 9.26.2024 .exe
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	remcos.exe

Executes dropped EXE 2 IoCs

pid	Process
1760	remcos.exe
2844	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-1-5-21-2170637797-568393320-3232933035-1000\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
Set value (str)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	TNT invoice 9.26.2024 .exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	TNT invoice 9.26.2024 .exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4860 set thread context of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 1760 set thread context of 2844	1760	remcos.exe	105

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	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 9.26.2024 .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	TNT invoice 9.26.2024 .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
4732	schtasks.exe
3532	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4160	powershell.exe
4160	powershell.exe
4160	powershell.exe
1924	powershell.exe
1924	powershell.exe
1924	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4160	powershell.exe
Token: SeDebugPrivilege	1924	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2844	remcos.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 4860 wrote to memory of 4160	4860	TNT invoice 9.26.2024 .exe	93
PID 4860 wrote to memory of 4160	4860	TNT invoice 9.26.2024 .exe	93
PID 4860 wrote to memory of 4160	4860	TNT invoice 9.26.2024 .exe	93
PID 4860 wrote to memory of 4732	4860	TNT invoice 9.26.2024 .exe	95
PID 4860 wrote to memory of 4732	4860	TNT invoice 9.26.2024 .exe	95
PID 4860 wrote to memory of 4732	4860	TNT invoice 9.26.2024 .exe	95
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 4860 wrote to memory of 1028	4860	TNT invoice 9.26.2024 .exe	97
PID 1028 wrote to memory of 1760	1028	TNT invoice 9.26.2024 .exe	100
PID 1028 wrote to memory of 1760	1028	TNT invoice 9.26.2024 .exe	100
PID 1028 wrote to memory of 1760	1028	TNT invoice 9.26.2024 .exe	100
PID 1760 wrote to memory of 1924	1760	remcos.exe	101
PID 1760 wrote to memory of 1924	1760	remcos.exe	101
PID 1760 wrote to memory of 1924	1760	remcos.exe	101
PID 1760 wrote to memory of 3532	1760	remcos.exe	103
PID 1760 wrote to memory of 3532	1760	remcos.exe	103
PID 1760 wrote to memory of 3532	1760	remcos.exe	103
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105
PID 1760 wrote to memory of 2844	1760	remcos.exe	105

C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
"C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4160
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7C8E.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4732
- C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
  "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1028
- - 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 use of WriteProcessMemory
    PID:1760
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1924
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB5BE.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:3532
  - - 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:2844

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1020,i,12470628711992022444,7767535593390851522,262144 --variations-seed-version --mojo-platform-channel-handle=4080 /prefetch:8
1⤵
PID:1860

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
058d227966f3fc3d8b1013dcb4da7759

SHA1
12e86095c1023de68e077d1be3bef203ae5314ed

SHA256
01730191106efc11d83284d8c036c4944c8010d004fe28a6c7cdc29328c7cb6f

SHA512
46771347ff23c6e262bf8625d7653f4799e0a23be450e530e4363e7c99cb1d40715580256e1b3708161d205d6470751aa596014e3ed4cb3f83255649d6602d97

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

Filesize
881KB

MD5
7afd5be4b77090388ddecb8169cf0bc3

SHA1
d3b6ba2e53aed1471c12196c577b7be56d14cf2f

SHA256
68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

SHA512
2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06

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
09623e92069ce8fc619899f253ed837d

SHA1
ec665909a9107d4a83616597e7d24d2b8c243e6a

SHA256
73aac51839278967e58592cb4ae89530189957a6b203db73285d63ae12f2eebf

SHA512
9aabedd07132262e0cb104793fc6b47036d86f97493887dc22dc7363b2991effee6a84d1b49a8ce6759a8084b2559574b7203e15015b9b85f2f7539417833af5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dxld4f2w.dhw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7C8E.tmp

Filesize
1KB

MD5
fdb1d0ff6eaf1dc56b2e010c14a18483

SHA1
a390a4e948e45491b190d1004943aa64d90740a7

SHA256
9d0969dccdfa701705abcb4626707b3bac0b16a69918206ea25b23aebeb3fe78

SHA512
e4e47469e3d43d56e8ad7f7d0458197f9ffe40654197ba50612f03ca2b9f734f91728275166b9680cdc4c8a184116b45def37fbb8b9aed2dc7aa31208a7278ae

Download Submit
memory/1028-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1028-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1028-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1028-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1028-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1924-101-0x0000000073540000-0x000000007358C000-memory.dmp

Filesize
304KB

Download
memory/1924-81-0x0000000005E30000-0x0000000006184000-memory.dmp

Filesize
3.3MB

Download
memory/1924-100-0x0000000006910000-0x000000000695C000-memory.dmp

Filesize
304KB

Download
memory/1924-111-0x00000000076D0000-0x0000000007773000-memory.dmp

Filesize
652KB

Download
memory/1924-112-0x0000000007A40000-0x0000000007A51000-memory.dmp

Filesize
68KB

Download
memory/1924-113-0x0000000007A80000-0x0000000007A94000-memory.dmp

Filesize
80KB

Download
memory/2844-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2844-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2844-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4160-18-0x0000000005AB0000-0x00000000060D8000-memory.dmp

Filesize
6.2MB

Download
memory/4160-15-0x0000000002F80000-0x0000000002FB6000-memory.dmp

Filesize
216KB

Download
memory/4160-22-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/4160-21-0x0000000006150000-0x00000000061B6000-memory.dmp

Filesize
408KB

Download
memory/4160-20-0x0000000005980000-0x00000000059E6000-memory.dmp

Filesize
408KB

Download
memory/4160-28-0x00000000062D0000-0x0000000006624000-memory.dmp

Filesize
3.3MB

Download
memory/4160-41-0x0000000006C30000-0x0000000006C7C000-memory.dmp

Filesize
304KB

Download
memory/4160-39-0x00000000068B0000-0x00000000068CE000-memory.dmp

Filesize
120KB

Download
memory/4160-19-0x00000000058E0000-0x0000000005902000-memory.dmp

Filesize
136KB

Download
memory/4160-16-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/4160-53-0x0000000006E70000-0x0000000006EA2000-memory.dmp

Filesize
200KB

Download
memory/4160-64-0x0000000006EB0000-0x0000000006ECE000-memory.dmp

Filesize
120KB

Download
memory/4160-54-0x000000006F510000-0x000000006F55C000-memory.dmp

Filesize
304KB

Download
memory/4160-65-0x0000000007AB0000-0x0000000007B53000-memory.dmp

Filesize
652KB

Download
memory/4160-66-0x0000000008220000-0x000000000889A000-memory.dmp

Filesize
6.5MB

Download
memory/4160-67-0x0000000007BD0000-0x0000000007BEA000-memory.dmp

Filesize
104KB

Download
memory/4160-68-0x0000000007C40000-0x0000000007C4A000-memory.dmp

Filesize
40KB

Download
memory/4160-69-0x0000000007E50000-0x0000000007EE6000-memory.dmp

Filesize
600KB

Download
memory/4160-70-0x0000000007DD0000-0x0000000007DE1000-memory.dmp

Filesize
68KB

Download
memory/4160-71-0x0000000007E00000-0x0000000007E0E000-memory.dmp

Filesize
56KB

Download
memory/4160-72-0x0000000007E10000-0x0000000007E24000-memory.dmp

Filesize
80KB

Download
memory/4160-73-0x0000000007F10000-0x0000000007F2A000-memory.dmp

Filesize
104KB

Download
memory/4160-74-0x0000000007EF0000-0x0000000007EF8000-memory.dmp

Filesize
32KB

Download
memory/4160-77-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/4860-0-0x0000000074A7E000-0x0000000074A7F000-memory.dmp

Filesize
4KB

Download
memory/4860-40-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/4860-10-0x0000000009A40000-0x0000000009ADC000-memory.dmp

Filesize
624KB

Download
memory/4860-9-0x0000000007390000-0x0000000007450000-memory.dmp

Filesize
768KB

Download
memory/4860-8-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/4860-7-0x0000000074A7E000-0x0000000074A7F000-memory.dmp

Filesize
4KB

Download
memory/4860-6-0x0000000005B40000-0x0000000005B50000-memory.dmp

Filesize
64KB

Download
memory/4860-5-0x0000000074A70000-0x0000000075220000-memory.dmp

Filesize
7.7MB

Download
memory/4860-4-0x0000000005A60000-0x0000000005A6A000-memory.dmp

Filesize
40KB

Download
memory/4860-3-0x00000000058D0000-0x0000000005962000-memory.dmp

Filesize
584KB

Download
memory/4860-2-0x0000000005DE0000-0x0000000006384000-memory.dmp

Filesize
5.6MB

Download
memory/4860-1-0x0000000000E20000-0x0000000000F02000-memory.dmp

Filesize
904KB

Download