remcos | 743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1

General

Target
743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe
Size 514KB
Sample260828-29wfcathne
SHA256 743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1
MD5 ca6ee4d4cb65255e2a5017794cea79fb
SHA1 b4f4eddcf4a9e1ba1aef6c1d122a06bc6219aabc
SHA512 dab9183d693a568b04088d820da9fd63da37dfe37581283b5b767ef2e55eda4aef120cf3b5c7c6501e49187eea00e4952d82338e06d5b96320ea376ca3cb9ce5
SSDEEP 12288:vg2cpfSUy6oFGNfZvCcXmw0z38qsPZ0WR:vgdfty6oFQfNwz38JZt
TLSH
T1CCB4BF01B6E2C172D57660300936E735DEBDBD2018369D7BA3DA0D57FE30290A739AB6
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

start-asegurar discovery remcos persistence rat

Malware Config

Extracted

Family

remcos

Version

7.2.2 Pro

Botnet

Start-Asegurar

C2

textotao.duckdns.org:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Words.exe
copy_folder
Office
delete_file
true
hide_file
true
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
Das.dat
keylog_flag
false
keylog_folder
Ofice
mouse_option
false
mutex
Rmc-KIP2CS
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Rmc-KIP2CS = "\"C:\\ProgramData\\Office\\Words.exe\""	743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Words.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Rmc-KIP2CS = "\"C:\\ProgramData\\Office\\Words.exe\""	Words.exe

Deletes itself 1 IoCs

pid	Process
4092	Words.exe

Executes dropped EXE 1 IoCs

pid	Process
4092	Words.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-1-5-21-3611646547-550105268-947503007-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-KIP2CS = "\"C:\\ProgramData\\Office\\Words.exe\""	743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-KIP2CS = "\"C:\\ProgramData\\Office\\Words.exe\""	743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3611646547-550105268-947503007-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-KIP2CS = "\"C:\\ProgramData\\Office\\Words.exe\""	Words.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-KIP2CS = "\"C:\\ProgramData\\Office\\Words.exe\""	Words.exe

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 2 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	743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Words.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4092	Words.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 2964 wrote to memory of 4092	2964	743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe	90

C:\Users\Admin\AppData\Local\Temp\743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe
"C:\Users\Admin\AppData\Local\Temp\743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2964
- C:\ProgramData\Office\Words.exe
  "C:\ProgramData\Office\Words.exe"
  2⤵
  - Adds policy Run key to start application
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4092

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Modify Registry

2

T1112

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

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Words.exe

Path C:\ProgramData\Office\Words.exe
Size 514KB
SHA256 743f28b9b0cb6faa1738232af50036a3171232b5b278f2bbdee1b732d11d05b1
MD5 ca6ee4d4cb65255e2a5017794cea79fb
SHA1 b4f4eddcf4a9e1ba1aef6c1d122a06bc6219aabc
SHA512 dab9183d693a568b04088d820da9fd63da37dfe37581283b5b767ef2e55eda4aef120cf3b5c7c6501e49187eea00e4952d82338e06d5b96320ea376ca3cb9ce5
SSDEEP 12288:vg2cpfSUy6oFGNfZvCcXmw0z38qsPZ0WR:vgdfty6oFQfNwz38JZt
TLSH
T1CCB4BF01B6E2C172D57660300936E735DEBDBD2018369D7BA3DA0D57FE30290A739AB6
MD5 SHA1 SHA512 SSDEEP TLSH

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Das.dat

Path C:\ProgramData\Ofice\Das.dat
Size 144B
SHA256 4ddcc30156de3ec42677e2e450ac194585bd55e220e93b6ce0f429eb39cd9f6b
MD5 6cd904f71716cdd4c8bf7401146137fe
SHA1 7492bd01a0a9b1ff871f1c14a63c9ac7302facb2
SHA512 b45ea7a93927faf33a389be03ee2b33bfd43e08bd65711ce18d9adbf5bff764ef0f52146386bbf3a2a2d79c30de4f445c092bfe809924f2ef3b2491e8f167317
TLSH
T1A5C092AA7FE1107D787BF2AA95F300367AB2FD6C803CC90E21D1038C09F6A056280793
MD5 SHA1 SHA512 TLSH

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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