remcos | 3f9fd47a1850bb51e06ce78cabb32d839b4d4f68daf028aa0465d7cb85099b1a

Analysis

max time kernel
152s
max time network
151s
platform
windows10_x64
resource
win10-en-20211104
submitted
10/11/2021, 09:37

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General

Target
DHL_119040 receipt document,pdf.exe
Size 838KB
Sample211110-llhatadhar
SHA256 3f9fd47a1850bb51e06ce78cabb32d839b4d4f68daf028aa0465d7cb85099b1a
MD5 ae18f1dede17042aa224eb451213f018
SHA1 9a56fa6f8a01388c8301632dd059e0eadc721144
SHA512 3e7264d582b8219619a49e5302c74a70e9d16662026ed222ca24dda23dc3586796f199a65f57913f1fc1ba57c791f823cb7e37f5500fb3db992d497958acf81b
MD5 SHA1 SHA512

Score

10^/10

remcos dimension persistence rat

Malware Config

Extracted

Family

remcos

Version

3.3.0 Pro

Botnet

DIMENSION

mirroronthewall.hopto.org:6041

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-LHHZG6
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

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

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Windows\CurrentVersion\Run\Zfruwdcg = "C:\\Users\\Public\\gcdwurfZ.url"	DHL_119040 receipt document,pdf.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
2484	reg.exe
3552	reg.exe
1972	reg.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1388	3996	DHL_119040 receipt document,pdf.exe	69
PID 3996 wrote to memory of 1932	3996	DHL_119040 receipt document,pdf.exe	70
PID 3996 wrote to memory of 1932	3996	DHL_119040 receipt document,pdf.exe	70
PID 3996 wrote to memory of 1932	3996	DHL_119040 receipt document,pdf.exe	70
PID 1932 wrote to memory of 2096	1932	cmd.exe	72
PID 1932 wrote to memory of 2096	1932	cmd.exe	72
PID 1932 wrote to memory of 2096	1932	cmd.exe	72
PID 2096 wrote to memory of 2484	2096	cmd.exe	74
PID 2096 wrote to memory of 2484	2096	cmd.exe	74
PID 2096 wrote to memory of 2484	2096	cmd.exe	74
PID 2096 wrote to memory of 3552	2096	cmd.exe	75
PID 2096 wrote to memory of 3552	2096	cmd.exe	75
PID 2096 wrote to memory of 3552	2096	cmd.exe	75
PID 2096 wrote to memory of 2140	2096	cmd.exe	76
PID 2096 wrote to memory of 2140	2096	cmd.exe	76
PID 2096 wrote to memory of 2140	2096	cmd.exe	76
PID 3996 wrote to memory of 972	3996	DHL_119040 receipt document,pdf.exe	77
PID 3996 wrote to memory of 972	3996	DHL_119040 receipt document,pdf.exe	77
PID 3996 wrote to memory of 972	3996	DHL_119040 receipt document,pdf.exe	77
PID 972 wrote to memory of 1972	972	cmd.exe	79
PID 972 wrote to memory of 1972	972	cmd.exe	79
PID 972 wrote to memory of 1972	972	cmd.exe	79

C:\Users\Admin\AppData\Local\Temp\DHL_119040 receipt document,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\DHL_119040 receipt document,pdf.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3996
- C:\Windows\SysWOW64\DpiScaling.exe
  C:\Windows\System32\DpiScaling.exe
  2⤵
  PID:1388
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Trast.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1932
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2096
  - - C:\Windows\SysWOW64\reg.exe
      reg delete hkcu\Environment /v windir /f
      4⤵
      Modifies registry key
      PID:2484
  - - C:\Windows\SysWOW64\reg.exe
      reg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\KDECO.bat reg delete hkcu\Environment /v windir /f && REM "
      4⤵
      Modifies registry key
      PID:3552
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
      4⤵
      PID:2140
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\nest.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:972
- - C:\Windows\SysWOW64\reg.exe
    reg delete hkcu\Environment /v windir /f
    3⤵
    - Modifies registry key
    PID:1972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1388-123-0x00000000033B0000-0x00000000033B1000-memory.dmp

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memory/1388-124-0x0000000003350000-0x0000000003351000-memory.dmp

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memory/1388-125-0x0000000072600000-0x000000007267C000-memory.dmp

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memory/1388-126-0x0000000000400000-0x0000000000479000-memory.dmp

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memory/1388-122-0x00000000032F0000-0x00000000032F1000-memory.dmp

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memory/3996-118-0x0000000000590000-0x00000000006DA000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads