remcos | f1d8f8c8bb9871fabbd6a001c48bc001c5181b512d2989e87f08280b74ada33b

Analysis

max time kernel
159s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
04/03/2022, 11:49

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General

Target
RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe
Size 732KB
Sample220304-ny1n2agbbp
SHA256 f1d8f8c8bb9871fabbd6a001c48bc001c5181b512d2989e87f08280b74ada33b
MD5 bb3cfdf7be037db22376218670ecba10
SHA1 59a92d5223cc15370c660650ab3ec42b29ec6e34
SHA512 fb58530661ef93fddf2066501a3eb463d775fdf75f8356ddb766988c623f6ff466661a143633fd7a72c4c8c3fc0b007ea7679e921c7b116d47bffb50046e37c2
MD5 SHA1 SHA512

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Version

3.2.1 Pro

Botnet

RemoteHost

boysgoblow.hopto.org:7838

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-K11KTM
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-1-5-21-790714498-1549421491-1643397139-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Iqfginl = "C:\\Users\\Public\\lnigfqI.url"	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1360	powershell.exe
1360	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1360	powershell.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 2316	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	64
PID 912 wrote to memory of 3668	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	65
PID 912 wrote to memory of 3668	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	65
PID 912 wrote to memory of 3668	912	RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe	65
PID 3668 wrote to memory of 544	3668	cmd.exe	67
PID 3668 wrote to memory of 544	3668	cmd.exe	67
PID 3668 wrote to memory of 544	3668	cmd.exe	67
PID 544 wrote to memory of 1936	544	cmd.exe	69
PID 544 wrote to memory of 1936	544	cmd.exe	69
PID 544 wrote to memory of 1936	544	cmd.exe	69
PID 1936 wrote to memory of 1564	1936	net.exe	70
PID 1936 wrote to memory of 1564	1936	net.exe	70
PID 1936 wrote to memory of 1564	1936	net.exe	70
PID 544 wrote to memory of 1360	544	cmd.exe	71
PID 544 wrote to memory of 1360	544	cmd.exe	71
PID 544 wrote to memory of 1360	544	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\RE RFQ 1584_654_FABIAN ENT.7365,pdf.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:912
- C:\Windows\SysWOW64\DpiScaling.exe
  C:\Windows\System32\DpiScaling.exe
  2⤵
  PID:2316
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Iqfginlt.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3668
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K C:\Users\Public\IqfginlO.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:544
  - - C:\Windows\SysWOW64\net.exe
      net session
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1936
    - - C:\Windows\SysWOW64\net1.exe
        
        C:\Windows\system32\net1 session
        5⤵
        
        PID:1564
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -WindowStyle Hidden -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1360

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

Replay Monitor

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Downloads

memory/912-132-0x0000000000400000-0x00000000004BE000-memory.dmp

Download

memory/912-134-0x0000000003F56000-0x0000000003F57000-memory.dmp

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memory/912-130-0x0000000002350000-0x0000000002351000-memory.dmp

Download

memory/1360-158-0x00000000097E0000-0x0000000009E5A000-memory.dmp

Download

memory/1360-153-0x0000000006BE0000-0x0000000006BFE000-memory.dmp

Download

memory/1360-165-0x0000000009440000-0x0000000009448000-memory.dmp

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memory/1360-164-0x0000000009460000-0x000000000947A000-memory.dmp

Download

memory/1360-163-0x0000000009350000-0x000000000935E000-memory.dmp

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memory/1360-145-0x0000000072C60000-0x0000000073410000-memory.dmp

Download

memory/1360-146-0x0000000006970000-0x00000000069A6000-memory.dmp

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memory/1360-147-0x0000000006B10000-0x0000000006B11000-memory.dmp

Download

memory/1360-148-0x0000000006B12000-0x0000000006B13000-memory.dmp

Download

memory/1360-149-0x0000000007150000-0x0000000007778000-memory.dmp

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memory/1360-150-0x00000000070B0000-0x00000000070D2000-memory.dmp

Download

memory/1360-151-0x0000000007780000-0x00000000077E6000-memory.dmp

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memory/1360-152-0x00000000077F0000-0x0000000007856000-memory.dmp

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memory/1360-162-0x0000000009390000-0x0000000009426000-memory.dmp

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memory/1360-154-0x0000000006B15000-0x0000000006B17000-memory.dmp

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memory/1360-155-0x00000000083C0000-0x00000000083F2000-memory.dmp

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memory/1360-156-0x000000006F630000-0x000000006F67C000-memory.dmp

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memory/1360-157-0x00000000083A0000-0x00000000083BE000-memory.dmp

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memory/1360-161-0x00000000091A0000-0x00000000091AA000-memory.dmp

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memory/1360-159-0x000000007F160000-0x000000007F161000-memory.dmp

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memory/1360-160-0x0000000009060000-0x000000000907A000-memory.dmp

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memory/2316-135-0x0000000002930000-0x0000000002931000-memory.dmp

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memory/2316-138-0x0000000072600000-0x000000007267C000-memory.dmp

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memory/2316-136-0x00000000029F0000-0x00000000029F1000-memory.dmp

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memory/2316-137-0x0000000002990000-0x0000000002991000-memory.dmp

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memory/2316-139-0x0000000000400000-0x0000000000479000-memory.dmp

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