remcos | 8f395dc9ca7802646cec0791fa6272449371c9ec9867448a004067f2a243d8ce

General

Target

Tax Organizer.exe
Size

6.1MB
MD5

4864a55cff27f686023456a22371e790
SHA1

6ed30c0371fe167d38411bfa6d720fcdcacc4f4c
SHA256

08c7fb6067acc8ac207d28ab616c9ea5bc0d394956455d6a3eecb73f8010f7a2
SHA512

4bd3a16435cca6ce7a7aa829eb967619a8b7c02598474e634442cffc55935870d54d844a04496bf9c7e8c29c40fae59ac6eb39c8550c091d06a28211491d0bfb
SSDEEP

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

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

deytrycooldown.duckdns.org:7070

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-TYSCJG
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

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Run\*ChromeUpdate = "rundll32.exe C:\\Users\\Admin\\Documents\\ChromeData.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

Tax Organizer.exe

pid process

2296 Tax Organizer.exe

pid	process
2296	Tax Organizer.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Tax Organizer.execmd.exe

description	pid	process	target process
PID 2296 wrote to memory of 2668	2296	Tax Organizer.exe	Tax Organizer.exe
PID 2296 wrote to memory of 2668	2296	Tax Organizer.exe	Tax Organizer.exe
PID 2296 wrote to memory of 2668	2296	Tax Organizer.exe	Tax Organizer.exe
PID 2296 wrote to memory of 2668	2296	Tax Organizer.exe	Tax Organizer.exe
PID 2296 wrote to memory of 2668	2296	Tax Organizer.exe	Tax Organizer.exe
PID 2296 wrote to memory of 2668	2296	Tax Organizer.exe	Tax Organizer.exe
PID 2296 wrote to memory of 2668	2296	Tax Organizer.exe	Tax Organizer.exe
PID 2296 wrote to memory of 2512	2296	Tax Organizer.exe	cmd.exe
PID 2296 wrote to memory of 2512	2296	Tax Organizer.exe	cmd.exe
PID 2296 wrote to memory of 2512	2296	Tax Organizer.exe	cmd.exe
PID 2296 wrote to memory of 2512	2296	Tax Organizer.exe	cmd.exe
PID 2512 wrote to memory of 2716	2512	cmd.exe	reg.exe
PID 2512 wrote to memory of 2716	2512	cmd.exe	reg.exe
PID 2512 wrote to memory of 2716	2512	cmd.exe	reg.exe
PID 2512 wrote to memory of 2716	2512	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\Tax Organizer.exe
"C:\Users\Admin\AppData\Local\Temp\Tax Organizer.exe"
1⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Users\Admin\AppData\Local\Temp\Tax Organizer.exe
  "C:\Users\Admin\AppData\Local\Temp\Tax Organizer.exe"
  2⤵
  PID:2668
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\ChromeData.dll",EntryPoint /f & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2512
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\ChromeData.dll",EntryPoint /f
    3⤵
    - Adds Run key to start application
    PID:2716

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2296-15-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2296-0-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2296-1-0x00000000102E6000-0x0000000010300000-memory.dmp

Filesize
104KB

Download
memory/2296-2-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2668-17-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-22-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-14-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-12-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-7-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2668-3-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-9-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2668-16-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-18-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-19-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2668-21-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-23-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-13-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-24-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-25-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-27-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-28-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-30-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-29-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-31-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-32-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-33-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-37-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-38-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-41-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2668-42-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads