remcos | 9ef95f67e220bb2c21e564af32614ba616871a79e96e0d50a441470f3605345b

General

Target

427c7d6c88b5c1c22024f233342464d2.exe
Size

1.7MB
MD5

427c7d6c88b5c1c22024f233342464d2
SHA1

c7f5ca6cf7105d9356423720f7ff4bb396582eb8
SHA256

9ef95f67e220bb2c21e564af32614ba616871a79e96e0d50a441470f3605345b
SHA512

340d70385c6c6cb67e600b2b0b9738fbe52c01b9082203fe14d22f53d09c264b0c67ed713fe42137606e3307a83a1525fccdf493a0572c4a102d09921f1ec3ef
SSDEEP

24576:EyQUxnv1g6TgA+Zw6elBAsOv4Dem9SN/cC0Fh7jDv2R6hDrykyqsPTsE69:EyMpS3AP4DemmpkqR6rNbs41

Score

10^/10

remcos vuendia discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

VUENDIA

C2

jorgeperezpu145.con-ip.com:1661

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-I897UU
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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Expressor = "C:\\Users\\Admin\\Music\\ExpressVpnUpdater\\Expresser.exe"	427c7d6c88b5c1c22024f233342464d2.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4144	3420	WerFault.exe	81

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	427c7d6c88b5c1c22024f233342464d2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	427c7d6c88b5c1c22024f233342464d2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2916	427c7d6c88b5c1c22024f233342464d2.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3420 wrote to memory of 2916	3420	427c7d6c88b5c1c22024f233342464d2.exe	85
PID 3420 wrote to memory of 2916	3420	427c7d6c88b5c1c22024f233342464d2.exe	85
PID 3420 wrote to memory of 2916	3420	427c7d6c88b5c1c22024f233342464d2.exe	85
PID 3420 wrote to memory of 2916	3420	427c7d6c88b5c1c22024f233342464d2.exe	85
PID 3420 wrote to memory of 2916	3420	427c7d6c88b5c1c22024f233342464d2.exe	85

C:\Users\Admin\AppData\Local\Temp\427c7d6c88b5c1c22024f233342464d2.exe
"C:\Users\Admin\AppData\Local\Temp\427c7d6c88b5c1c22024f233342464d2.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3420
- C:\Users\Admin\AppData\Local\Temp\427c7d6c88b5c1c22024f233342464d2.exe
  "C:\Users\Admin\AppData\Local\Temp\427c7d6c88b5c1c22024f233342464d2.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2916
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3420 -s 404
  2⤵
  - Program crash
  PID:4144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3420 -ip 3420
1⤵
PID:468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
f4c2247e26b6af5e736b5a5babc5e49d

SHA1
2177668dc93bdfad711e691adbf4dc1111f7e929

SHA256
1485d34849492875e93f87dd3215ffa1396509180a6bdcc62fd942d8fd20c7c9

SHA512
e02eaacd05981a7d76b9e0417b05750807b5d28e3b52d18067f24c1ca7db331da7101e849d8dd4fa5f8fb085a22f581f2196c85537144dd19a8ebedc51aa55ab

Download Submit
memory/2916-16-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download
memory/2916-9-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-18-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-8-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-39-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-10-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-40-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-13-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-47-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-64-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-31-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-7-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-63-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-32-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-20-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-21-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/2916-22-0x00000000005D0000-0x0000000000652000-memory.dmp

Filesize
520KB

Download
memory/3420-17-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download
memory/3420-28-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download
memory/3420-29-0x000000000043E000-0x0000000000456000-memory.dmp

Filesize
96KB

Download
memory/3420-25-0x000000000043E000-0x0000000000456000-memory.dmp

Filesize
96KB

Download
memory/3420-0-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download
memory/3420-3-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download
memory/3420-14-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download
memory/3420-1-0x000000000043E000-0x0000000000456000-memory.dmp

Filesize
96KB

Download
memory/3420-6-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download
memory/3420-4-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download
memory/3420-5-0x0000000000400000-0x00000000005C2000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads