remcos | 3f9fd47a1850bb51e06ce78cabb32d839b4d4f68daf028aa0465d7cb85099b1a

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-en-20211014
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-1-5-21-2955169046-2371869340-1800780948-1000\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
912	reg.exe
336	reg.exe
2000	reg.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1936	1648	DHL_119040 receipt document,pdf.exe	30
PID 1648 wrote to memory of 1564	1648	DHL_119040 receipt document,pdf.exe	31
PID 1648 wrote to memory of 1564	1648	DHL_119040 receipt document,pdf.exe	31
PID 1648 wrote to memory of 1564	1648	DHL_119040 receipt document,pdf.exe	31
PID 1648 wrote to memory of 1564	1648	DHL_119040 receipt document,pdf.exe	31
PID 1564 wrote to memory of 1672	1564	cmd.exe	33
PID 1564 wrote to memory of 1672	1564	cmd.exe	33
PID 1564 wrote to memory of 1672	1564	cmd.exe	33
PID 1564 wrote to memory of 1672	1564	cmd.exe	33
PID 1672 wrote to memory of 336	1672	cmd.exe	35
PID 1672 wrote to memory of 336	1672	cmd.exe	35
PID 1672 wrote to memory of 336	1672	cmd.exe	35
PID 1672 wrote to memory of 336	1672	cmd.exe	35
PID 1672 wrote to memory of 2000	1672	cmd.exe	36
PID 1672 wrote to memory of 2000	1672	cmd.exe	36
PID 1672 wrote to memory of 2000	1672	cmd.exe	36
PID 1672 wrote to memory of 2000	1672	cmd.exe	36
PID 1672 wrote to memory of 1216	1672	cmd.exe	37
PID 1672 wrote to memory of 1216	1672	cmd.exe	37
PID 1672 wrote to memory of 1216	1672	cmd.exe	37
PID 1672 wrote to memory of 1216	1672	cmd.exe	37
PID 1648 wrote to memory of 540	1648	DHL_119040 receipt document,pdf.exe	38
PID 1648 wrote to memory of 540	1648	DHL_119040 receipt document,pdf.exe	38
PID 1648 wrote to memory of 540	1648	DHL_119040 receipt document,pdf.exe	38
PID 1648 wrote to memory of 540	1648	DHL_119040 receipt document,pdf.exe	38
PID 540 wrote to memory of 912	540	cmd.exe	40
PID 540 wrote to memory of 912	540	cmd.exe	40
PID 540 wrote to memory of 912	540	cmd.exe	40
PID 540 wrote to memory of 912	540	cmd.exe	40

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:1648
- C:\Windows\SysWOW64\logagent.exe
  C:\Windows\System32\logagent.exe
  2⤵
  PID:1936
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Public\Trast.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1564
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1672
  - - C:\Windows\SysWOW64\reg.exe
      reg delete hkcu\Environment /v windir /f
      4⤵
      Modifies registry key
      PID:336
  - - 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:2000
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
      4⤵
      PID:1216
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Public\nest.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:540
- - C:\Windows\SysWOW64\reg.exe
    reg delete hkcu\Environment /v windir /f
    3⤵
    - Modifies registry key
    PID:912

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/1648-56-0x00000000003E1000-0x00000000003F5000-memory.dmp

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memory/1648-57-0x00000000754F1000-0x00000000754F3000-memory.dmp

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memory/1648-55-0x00000000001C0000-0x00000000001C1000-memory.dmp

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memory/1936-68-0x0000000072600000-0x000000007267C000-memory.dmp

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memory/1936-78-0x0000000000150000-0x0000000000151000-memory.dmp

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memory/1936-80-0x00000000002C0000-0x0000000000339000-memory.dmp

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memory/1936-79-0x0000000072600000-0x000000007267C000-memory.dmp

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memory/1936-76-0x0000000000080000-0x0000000000081000-memory.dmp

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memory/1936-77-0x0000000000100000-0x0000000000101000-memory.dmp

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memory/1936-58-0x0000000000080000-0x0000000000081000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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