remcos | 544c5f2f22e444b131f0b0f6c2b01c6f0c84356dea8aa805d3292ccb2c67aaf5

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-10-2024 17:08

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General

Target

TNT invoice 10.3.2024.exe
Size

988KB
MD5

8e096c769a06afc7cb0d2e4903632829
SHA1

5d1887cbc765869914c5a5139806ca960c1f5c5c
SHA256

7e5f8060468b9e18265644190e564d0b53d6eeb0b4cf3b3e35405d3a4447fc1b
SHA512

911750d486f469ea98f6e2895bd65657c85a20804b1c06eaf3edbd35f20a76c729c9a39ead4bc5db705300aa4c10740c0190cac1ac0d900f77b95171a16f3073
SSDEEP

24576:xgpPDplZrOxmv3s4XVZOL8MevAUxZZ6UHxOt4UXZ:x8Fgmv3s4XHW8sUp6UU3XZ

Score

10^/10

remcos irnserv1 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

IRNSERV1

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
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-20UF0Z
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 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3328	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	TNT invoice 10.3.2024.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3844 set thread context of 1972	3844	TNT invoice 10.3.2024.exe	90

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	TNT invoice 10.3.2024.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TNT invoice 10.3.2024.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 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3888	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3328	powershell.exe
3328	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3328	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1972	TNT invoice 10.3.2024.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3844 wrote to memory of 3328	3844	TNT invoice 10.3.2024.exe	86
PID 3844 wrote to memory of 3328	3844	TNT invoice 10.3.2024.exe	86
PID 3844 wrote to memory of 3328	3844	TNT invoice 10.3.2024.exe	86
PID 3844 wrote to memory of 3888	3844	TNT invoice 10.3.2024.exe	88
PID 3844 wrote to memory of 3888	3844	TNT invoice 10.3.2024.exe	88
PID 3844 wrote to memory of 3888	3844	TNT invoice 10.3.2024.exe	88
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90
PID 3844 wrote to memory of 1972	3844	TNT invoice 10.3.2024.exe	90

C:\Users\Admin\AppData\Local\Temp\TNT invoice 10.3.2024.exe
"C:\Users\Admin\AppData\Local\Temp\TNT invoice 10.3.2024.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3844
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ZnxXVXP.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3328
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZnxXVXP" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD987.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3888
- C:\Users\Admin\AppData\Local\Temp\TNT invoice 10.3.2024.exe
  "C:\Users\Admin\AppData\Local\Temp\TNT invoice 10.3.2024.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1972

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

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

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
6aa41cc02f828c12743939afdcd36468

SHA1
261384e09df6961a74891a9a65d90505a2d2abfa

SHA256
f9c887e176602ae745d7ddd6f01e1fd68aab0e1d557ca30ce542341b6d7ebf4a

SHA512
73255e91df52afe4b49e2a928eac710378f996450a00a3d0f9fde85e9f1257f997156db4adcd00ec0bf8c37f49ff28268cca9d1aedc7e6d553470191a6bbc33b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_g3d3innj.jjn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD987.tmp

Filesize
1KB

MD5
6327e2b8677098c91025f189d337efa9

SHA1
772d06c4e5aa7879f0e85a957368acd9dd44cd64

SHA256
fdb3262848be1befd665b3f5fa91df612b97064a3ca7418ed4456c3b90a4b6da

SHA512
7852d39cbd0c87dc401b50f75b1d31abd31892fa670e2081fb7327e520b46520f384860dc4a1e0accda3800ad582ce1bbff66766aea7c9794240746c55ad0158

Download Submit
memory/1972-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-106-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-91-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-90-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-99-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-83-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-82-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-98-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-107-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1972-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3328-25-0x0000000074A80000-0x0000000075230000-memory.dmp

Filesize
7.7MB

Download
memory/3328-65-0x0000000007740000-0x00000000077D6000-memory.dmp

Filesize
600KB

Download
memory/3328-33-0x0000000005B80000-0x0000000005ED4000-memory.dmp

Filesize
3.3MB

Download
memory/3328-20-0x00000000050F0000-0x0000000005112000-memory.dmp

Filesize
136KB

Download
memory/3328-21-0x0000000005190000-0x00000000051F6000-memory.dmp

Filesize
408KB

Download
memory/3328-19-0x0000000074A80000-0x0000000075230000-memory.dmp

Filesize
7.7MB

Download
memory/3328-76-0x0000000074A80000-0x0000000075230000-memory.dmp

Filesize
7.7MB

Download
memory/3328-44-0x00000000061A0000-0x00000000061BE000-memory.dmp

Filesize
120KB

Download
memory/3328-73-0x00000000077E0000-0x00000000077E8000-memory.dmp

Filesize
32KB

Download
memory/3328-45-0x0000000006590000-0x00000000065DC000-memory.dmp

Filesize
304KB

Download
memory/3328-47-0x0000000006770000-0x00000000067A2000-memory.dmp

Filesize
200KB

Download
memory/3328-48-0x000000006F300000-0x000000006F34C000-memory.dmp

Filesize
304KB

Download
memory/3328-58-0x0000000006750000-0x000000000676E000-memory.dmp

Filesize
120KB

Download
memory/3328-59-0x0000000007370000-0x0000000007413000-memory.dmp

Filesize
652KB

Download
memory/3328-60-0x0000000007B00000-0x000000000817A000-memory.dmp

Filesize
6.5MB

Download
memory/3328-61-0x00000000074C0000-0x00000000074DA000-memory.dmp

Filesize
104KB

Download
memory/3328-62-0x0000000007530000-0x000000000753A000-memory.dmp

Filesize
40KB

Download
memory/3328-17-0x0000000074A80000-0x0000000075230000-memory.dmp

Filesize
7.7MB

Download
memory/3328-18-0x0000000005260000-0x0000000005888000-memory.dmp

Filesize
6.2MB

Download
memory/3328-22-0x0000000005890000-0x00000000058F6000-memory.dmp

Filesize
408KB

Download
memory/3328-15-0x0000000004BF0000-0x0000000004C26000-memory.dmp

Filesize
216KB

Download
memory/3328-67-0x00000000076C0000-0x00000000076D1000-memory.dmp

Filesize
68KB

Download
memory/3328-70-0x00000000076F0000-0x00000000076FE000-memory.dmp

Filesize
56KB

Download
memory/3328-71-0x0000000007700000-0x0000000007714000-memory.dmp

Filesize
80KB

Download
memory/3328-72-0x0000000007800000-0x000000000781A000-memory.dmp

Filesize
104KB

Download
memory/3844-46-0x0000000074A80000-0x0000000075230000-memory.dmp

Filesize
7.7MB

Download
memory/3844-0-0x0000000074A8E000-0x0000000074A8F000-memory.dmp

Filesize
4KB

Download
memory/3844-10-0x0000000008290000-0x0000000008350000-memory.dmp

Filesize
768KB

Download
memory/3844-9-0x0000000074A80000-0x0000000075230000-memory.dmp

Filesize
7.7MB

Download
memory/3844-8-0x0000000074A8E000-0x0000000074A8F000-memory.dmp

Filesize
4KB

Download
memory/3844-7-0x00000000059D0000-0x00000000059EA000-memory.dmp

Filesize
104KB

Download
memory/3844-6-0x0000000005A20000-0x0000000005ABC000-memory.dmp

Filesize
624KB

Download
memory/3844-5-0x0000000074A80000-0x0000000075230000-memory.dmp

Filesize
7.7MB

Download
memory/3844-4-0x0000000005720000-0x000000000572A000-memory.dmp

Filesize
40KB

Download
memory/3844-3-0x0000000005780000-0x0000000005812000-memory.dmp

Filesize
584KB

Download
memory/3844-2-0x0000000005C90000-0x0000000006234000-memory.dmp

Filesize
5.6MB

Download
memory/3844-1-0x0000000000C70000-0x0000000000D6C000-memory.dmp

Filesize
1008KB

Download