remcos | 2481442ea290e278bc156a0117e45998268db4cebca8e15e16537d3f76922ea5

General

Target

25' W-2 1040 CLARAS.pdf.exe
Size

6.1MB
MD5

4864a55cff27f686023456a22371e790
SHA1

6ed30c0371fe167d38411bfa6d720fcdcacc4f4c
SHA256

08c7fb6067acc8ac207d28ab616c9ea5bc0d394956455d6a3eecb73f8010f7a2
SHA512

4bd3a16435cca6ce7a7aa829eb967619a8b7c02598474e634442cffc55935870d54d844a04496bf9c7e8c29c40fae59ac6eb39c8550c091d06a28211491d0bfb
SSDEEP

98304:VZQIM+/nv/CDoAkYwpAa5ge1zZ/jtdZwUkQ:bJCKlA2VKUz

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

privmerkt.com:4728

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-7YW88I
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
Remcos family
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-1-5-21-2436272344-4274332273-444425594-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Palo Alto Network Sensor = "rundll32.exe C:\\Users\\Admin\\Documents\\JavaUpdater943034.dll,EntryPoint"	reg.exe

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	25' W-2 1040 CLARAS.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	25' W-2 1040 CLARAS.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1372 wrote to memory of 4568	1372	25' W-2 1040 CLARAS.pdf.exe	94
PID 1372 wrote to memory of 4568	1372	25' W-2 1040 CLARAS.pdf.exe	94
PID 1372 wrote to memory of 4568	1372	25' W-2 1040 CLARAS.pdf.exe	94
PID 1372 wrote to memory of 4568	1372	25' W-2 1040 CLARAS.pdf.exe	94
PID 1372 wrote to memory of 4568	1372	25' W-2 1040 CLARAS.pdf.exe	94
PID 1372 wrote to memory of 4568	1372	25' W-2 1040 CLARAS.pdf.exe	94
PID 1372 wrote to memory of 744	1372	25' W-2 1040 CLARAS.pdf.exe	96
PID 1372 wrote to memory of 744	1372	25' W-2 1040 CLARAS.pdf.exe	96
PID 1372 wrote to memory of 744	1372	25' W-2 1040 CLARAS.pdf.exe	96
PID 744 wrote to memory of 4040	744	cmd.exe	98
PID 744 wrote to memory of 4040	744	cmd.exe	98
PID 744 wrote to memory of 4040	744	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\25' W-2 1040 CLARAS.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\25' W-2 1040 CLARAS.pdf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1372
- C:\Users\Admin\AppData\Local\Temp\25' W-2 1040 CLARAS.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\25' W-2 1040 CLARAS.pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4568
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Palo Alto Network Sensor" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\JavaUpdater943034.dll",EntryPoint /f & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:744
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "Palo Alto Network Sensor" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\JavaUpdater943034.dll",EntryPoint /f
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:4040

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

memory/1372-0-0x0000000001000000-0x000000000102D000-memory.dmp

Filesize
180KB

Download
memory/1372-22-0x0000000002950000-0x00000000029A5000-memory.dmp

Filesize
340KB

Download
memory/4568-14-0x0000000000A6B000-0x0000000000A6C000-memory.dmp

Filesize
4KB

Download
memory/4568-11-0x0000000000A6E000-0x0000000000A6F000-memory.dmp

Filesize
4KB

Download
memory/4568-17-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-10-0x0000000000A70000-0x0000000000A71000-memory.dmp

Filesize
4KB

Download
memory/4568-9-0x0000000000A6F000-0x0000000000A70000-memory.dmp

Filesize
4KB

Download
memory/4568-8-0x0000000000A80000-0x0000000000A81000-memory.dmp

Filesize
4KB

Download
memory/4568-7-0x0000000000A72000-0x0000000000A73000-memory.dmp

Filesize
4KB

Download
memory/4568-6-0x0000000000A6A000-0x0000000000A6B000-memory.dmp

Filesize
4KB

Download
memory/4568-5-0x0000000000A73000-0x0000000000A74000-memory.dmp

Filesize
4KB

Download
memory/4568-4-0x0000000000A68000-0x0000000000A69000-memory.dmp

Filesize
4KB

Download
memory/4568-3-0x0000000000A69000-0x0000000000A6A000-memory.dmp

Filesize
4KB

Download
memory/4568-13-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-15-0x0000000000A6C000-0x0000000000A6D000-memory.dmp

Filesize
4KB

Download
memory/4568-16-0x0000000000A6D000-0x0000000000A6E000-memory.dmp

Filesize
4KB

Download
memory/4568-38-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-12-0x0000000000A71000-0x0000000000A72000-memory.dmp

Filesize
4KB

Download
memory/4568-18-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-19-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-21-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-1-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-24-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-26-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-30-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-31-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-32-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-33-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-34-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-36-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-37-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/4568-2-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads