remcos | 544c5f2f22e444b131f0b0f6c2b01c6f0c84356dea8aa805d3292ccb2c67aaf5

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

C2

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
2700	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2100 set thread context of 2084	2100	TNT invoice 10.3.2024.exe	35

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TNT invoice 10.3.2024.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
2320	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2700	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2700	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2084	TNT invoice 10.3.2024.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2700	2100	TNT invoice 10.3.2024.exe	31
PID 2100 wrote to memory of 2700	2100	TNT invoice 10.3.2024.exe	31
PID 2100 wrote to memory of 2700	2100	TNT invoice 10.3.2024.exe	31
PID 2100 wrote to memory of 2700	2100	TNT invoice 10.3.2024.exe	31
PID 2100 wrote to memory of 2320	2100	TNT invoice 10.3.2024.exe	32
PID 2100 wrote to memory of 2320	2100	TNT invoice 10.3.2024.exe	32
PID 2100 wrote to memory of 2320	2100	TNT invoice 10.3.2024.exe	32
PID 2100 wrote to memory of 2320	2100	TNT invoice 10.3.2024.exe	32
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35
PID 2100 wrote to memory of 2084	2100	TNT invoice 10.3.2024.exe	35

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⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2100
- 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:2700
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZnxXVXP" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD1DF.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2320
- 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:2084

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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
d9d8dc059cb1fc24aa8230308e02193f

SHA1
9b645642602857079017e0992becb75122fc9d78

SHA256
b7012fc2e8a3c7cfc35115ba3a1bda6acde1ed3d7ca9aeda4fbedbbf8e8c98c8

SHA512
ef5d2a8ff1592749f5387cf891b30aa097ea6c97ad396058748c915e668c15675dc835dcae6e1d2fa44d889477c12b1cf28d57cb954c06afe0dee28aa1e57b55

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD1DF.tmp

Filesize
1KB

MD5
b9bbcd3e27bc336fc4e56f814d36661f

SHA1
b5f8ab094e66ba033c48bb3d375f4ee92a4c7917

SHA256
0ddf9fd8405bc5d1fe66948a9bf1c6361fef8fa97d4dcf048b66fa213888fa59

SHA512
6805f10eee2cb75b3e7fcd61d90521fac60bfc8f48e5be675fcb2f8cf8eb5f9a089480bf225cfd0af87ea8b166b584fb0afcf0841560a31ee0339636044291de

Download Submit
memory/2084-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2084-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2084-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2100-1-0x0000000001390000-0x000000000148C000-memory.dmp

Filesize
1008KB

Download
memory/2100-33-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-3-0x0000000000500000-0x000000000051A000-memory.dmp

Filesize
104KB

Download
memory/2100-5-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-0-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

Filesize
4KB

Download
memory/2100-2-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-6-0x0000000004970000-0x0000000004A30000-memory.dmp

Filesize
768KB

Download
memory/2100-4-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads