remcos | 41d511392fc1e9e37a96d7e0d1e2a947d3de3da299d1a0fab9f522b98e38b659

Analysis

max time kernel
149s
max time network
155s
platform
windows10_x64
resource
win10-en-20211104
submitted
10/11/2021, 09:27

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General

Target
RFQ_AP65425652_032421 urgentes,pdf.exe
Size 838KB
Sample211110-lerkxagfe6
SHA256 41d511392fc1e9e37a96d7e0d1e2a947d3de3da299d1a0fab9f522b98e38b659
MD5 529579420d5afb8a2b13d638c1a4ce71
SHA1 83baaa624ba6b79ff36b4b145f70a482dcc946f3
SHA512 0f699fb36ad7f7bd4266249af7a522387ebbb75a56293106a55600ab749cb59bd237ee80638dbd9acbd44c551d47b8bf3320ea66a96606e9b4fb0611f479c095
MD5 SHA1 SHA512

Score

10^/10

remcos udonwa persistence rat

Malware Config

Extracted

Family

remcos

Version

3.3.0 Pro

Botnet

UDONWA

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-HD09KY
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\Ekcvbvof = "C:\\Users\\Public\\fovbvckE.url"	RFQ_AP65425652_032421 urgentes,pdf.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
2864	reg.exe
528	reg.exe
1036	reg.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 752	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	69
PID 3684 wrote to memory of 3284	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	70
PID 3684 wrote to memory of 3284	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	70
PID 3684 wrote to memory of 3284	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	70
PID 3284 wrote to memory of 3436	3284	cmd.exe	72
PID 3284 wrote to memory of 3436	3284	cmd.exe	72
PID 3284 wrote to memory of 3436	3284	cmd.exe	72
PID 3436 wrote to memory of 2864	3436	cmd.exe	74
PID 3436 wrote to memory of 2864	3436	cmd.exe	74
PID 3436 wrote to memory of 2864	3436	cmd.exe	74
PID 3436 wrote to memory of 528	3436	cmd.exe	75
PID 3436 wrote to memory of 528	3436	cmd.exe	75
PID 3436 wrote to memory of 528	3436	cmd.exe	75
PID 3436 wrote to memory of 648	3436	cmd.exe	76
PID 3436 wrote to memory of 648	3436	cmd.exe	76
PID 3436 wrote to memory of 648	3436	cmd.exe	76
PID 3684 wrote to memory of 904	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	77
PID 3684 wrote to memory of 904	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	77
PID 3684 wrote to memory of 904	3684	RFQ_AP65425652_032421 urgentes,pdf.exe	77
PID 904 wrote to memory of 1036	904	cmd.exe	79
PID 904 wrote to memory of 1036	904	cmd.exe	79
PID 904 wrote to memory of 1036	904	cmd.exe	79

C:\Users\Admin\AppData\Local\Temp\RFQ_AP65425652_032421 urgentes,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ_AP65425652_032421 urgentes,pdf.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3684
- C:\Windows\SysWOW64\DpiScaling.exe
  C:\Windows\System32\DpiScaling.exe
  2⤵
  PID:752
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Trast.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3284
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3436
  - - C:\Windows\SysWOW64\reg.exe
      reg delete hkcu\Environment /v windir /f
      4⤵
      Modifies registry key
      PID:2864
  - - 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:528
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
      4⤵
      PID:648
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\nest.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:904
- - C:\Windows\SysWOW64\reg.exe
    reg delete hkcu\Environment /v windir /f
    3⤵
    - Modifies registry key
    PID:1036

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/752-131-0x0000000072600000-0x000000007267C000-memory.dmp

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memory/752-129-0x0000000003330000-0x0000000003331000-memory.dmp

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memory/752-128-0x0000000003270000-0x0000000003271000-memory.dmp

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memory/752-130-0x00000000032D0000-0x00000000032D1000-memory.dmp

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memory/752-132-0x0000000000400000-0x0000000000479000-memory.dmp

Download

memory/3684-118-0x0000000002330000-0x0000000002331000-memory.dmp

Download

memory/3684-119-0x0000000002351000-0x0000000002365000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads