remcos | 3bfb18b65c870e3c012f8d38fa70ea7441d6b09530e5f77d837d636c0e2abd0d

Analysis

max time kernel
150s
max time network
150s
platform
windows10_x64
resource
win10-en-20211014
submitted
22/10/2021, 05:46

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General

Target
PI20200206AP,pdf.exe
Size 973KB
Sample211022-ggcsbacafp
SHA256 3bfb18b65c870e3c012f8d38fa70ea7441d6b09530e5f77d837d636c0e2abd0d
MD5 d96b6070b2724d3d7a47cbb59d414c9d
SHA1 ec6221a6ff1cd193c4d12e2b932f5ae2bc86abba
SHA512 385086bee2f518d47f843ed03df42b6090b82dc928f8df16970e1d55e7febe42786fa8639097c1be8bdc4dbf22a3efdf7a53bcd16d5eaf1e67c6fdd8ffd77791
MD5 SHA1 SHA512

Score

10^/10

remcos zubby persistence rat

Malware Config

Extracted

Family

remcos

Botnet

ZUBBY

newlogs.ddns.net:7143

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-0OL7CZ
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-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run\Krgrgu = "C:\\Users\\Public\\ugrgrK.url"	PI20200206AP,pdf.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
1436	reg.exe
392	reg.exe
1664	reg.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 1160	2828	PI20200206AP,pdf.exe	69
PID 2828 wrote to memory of 3124	2828	PI20200206AP,pdf.exe	70
PID 2828 wrote to memory of 3124	2828	PI20200206AP,pdf.exe	70
PID 2828 wrote to memory of 3124	2828	PI20200206AP,pdf.exe	70
PID 3124 wrote to memory of 3172	3124	cmd.exe	72
PID 3124 wrote to memory of 3172	3124	cmd.exe	72
PID 3124 wrote to memory of 3172	3124	cmd.exe	72
PID 3172 wrote to memory of 1436	3172	cmd.exe	74
PID 3172 wrote to memory of 1436	3172	cmd.exe	74
PID 3172 wrote to memory of 1436	3172	cmd.exe	74
PID 3172 wrote to memory of 392	3172	cmd.exe	75
PID 3172 wrote to memory of 392	3172	cmd.exe	75
PID 3172 wrote to memory of 392	3172	cmd.exe	75
PID 3172 wrote to memory of 1068	3172	cmd.exe	76
PID 3172 wrote to memory of 1068	3172	cmd.exe	76
PID 3172 wrote to memory of 1068	3172	cmd.exe	76
PID 2828 wrote to memory of 364	2828	PI20200206AP,pdf.exe	77
PID 2828 wrote to memory of 364	2828	PI20200206AP,pdf.exe	77
PID 2828 wrote to memory of 364	2828	PI20200206AP,pdf.exe	77
PID 364 wrote to memory of 1664	364	cmd.exe	79
PID 364 wrote to memory of 1664	364	cmd.exe	79
PID 364 wrote to memory of 1664	364	cmd.exe	79

C:\Users\Admin\AppData\Local\Temp\PI20200206AP,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PI20200206AP,pdf.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Windows\SysWOW64\secinit.exe
  C:\Windows\System32\secinit.exe
  2⤵
  PID:1160
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Trast.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3124
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3172
  - - C:\Windows\SysWOW64\reg.exe
      reg delete hkcu\Environment /v windir /f
      4⤵
      Modifies registry key
      PID:1436
  - - 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:392
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
      4⤵
      PID:1068
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\nest.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:364
- - C:\Windows\SysWOW64\reg.exe
    reg delete hkcu\Environment /v windir /f
    3⤵
    - Modifies registry key
    PID:1664

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/1160-124-0x0000000072600000-0x000000007267C000-memory.dmp

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memory/1160-123-0x00000000023D0000-0x00000000023D1000-memory.dmp

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memory/1160-125-0x0000000002620000-0x0000000002699000-memory.dmp

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memory/1160-122-0x0000000002610000-0x0000000002611000-memory.dmp

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memory/1160-121-0x0000000002370000-0x0000000002371000-memory.dmp

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memory/2828-116-0x0000000000500000-0x00000000005AE000-memory.dmp

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memory/2828-118-0x0000000003EE1000-0x0000000003EF8000-memory.dmp

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memory/2828-117-0x0000000003EE0000-0x0000000003EE1000-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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Downloads