remcos | f2993afe3bd724db151713c80ff4e2207e66f0ef4dacfa099f516573db2a9d62

Analysis

max time kernel
147s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 09:21

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General

Target
W2_1040_drivers license/msimg32.dll
Size 45.1MB
Sample240514-lbtwvsae63
SHA256 1a9afb8a9e6075253a88f6ddc5ffb989a372d1fa9687052f17f68c4d1d094247
MD5 55aaccd6514b5c7be26837c62b37549c
SHA1 e486114ecdf933f0cbb1851d9cce83c6183ab6f0
SHA512 3e43bafcb51d4e64eebd61d8f27bae8aed85df99ab79ea65f4d165a2d4dba59b404f7cf3f96550f0855ea076c88c6dd87af71c4421c77b5dc526ed5cfc0c88f0
SSDEEP 786432:NUP7GCGO7t0Srkx/tC0SzIdSwh/WxbpNHQD3trzRpR:NUP7GCG6iSrkx1hSzYsHQD3t/Rv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

faststaynow.duckdns.org:5057

Attributes

audio_folder
MicRecords
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
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-0TC926
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

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

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*crowdUpdater = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\crowdstrikeModule.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1148	regsvr32.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 1148	4856	regsvr32.exe	84
PID 4856 wrote to memory of 1148	4856	regsvr32.exe	84
PID 4856 wrote to memory of 1148	4856	regsvr32.exe	84
PID 1148 wrote to memory of 4040	1148	regsvr32.exe	95
PID 1148 wrote to memory of 4040	1148	regsvr32.exe	95
PID 1148 wrote to memory of 4040	1148	regsvr32.exe	95
PID 1148 wrote to memory of 4040	1148	regsvr32.exe	95
PID 1148 wrote to memory of 4040	1148	regsvr32.exe	95
PID 1148 wrote to memory of 4040	1148	regsvr32.exe	95
PID 1148 wrote to memory of 1680	1148	regsvr32.exe	96
PID 1148 wrote to memory of 1680	1148	regsvr32.exe	96
PID 1148 wrote to memory of 1680	1148	regsvr32.exe	96
PID 1680 wrote to memory of 3668	1680	cmd.exe	98
PID 1680 wrote to memory of 3668	1680	cmd.exe	98
PID 1680 wrote to memory of 3668	1680	cmd.exe	98

C:\Windows\system32\regsvr32.exe
regsvr32 /s "C:\Users\Admin\AppData\Local\Temp\W2_1040_drivers license\msimg32.dll"
1⤵
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Windows\SysWOW64\regsvr32.exe
  /s "C:\Users\Admin\AppData\Local\Temp\W2_1040_drivers license\msimg32.dll"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:1148
- - C:\Windows\SysWOW64\regsvr32.exe
    "C:\Windows\SysWOW64\regsvr32.exe"
    3⤵
    PID:4040
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*crowdUpdater" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\crowdstrikeModule.dll",EntryPoint /f & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1680
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*crowdUpdater" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\crowdstrikeModule.dll",EntryPoint /f
      4⤵
      Adds Run key to start application
      PID:3668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1148-11-0x0000000010000000-0x0000000012DD7000-memory.dmp

Download

memory/1148-1-0x00000000102E6000-0x0000000010300000-memory.dmp

Download

memory/1148-0-0x0000000010000000-0x0000000012DD7000-memory.dmp

Download

memory/1148-2-0x0000000010000000-0x0000000012DD7000-memory.dmp

Download

memory/1148-12-0x0000000012D76000-0x0000000012D7A000-memory.dmp

Download

memory/4040-13-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-17-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-10-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-7-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-9-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-3-0x0000000001290000-0x0000000001291000-memory.dmp

Download

memory/4040-14-0x0000000001200000-0x0000000001282000-memory.dmp

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memory/4040-15-0x0000000001200000-0x0000000001282000-memory.dmp

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memory/4040-16-0x0000000001200000-0x0000000001282000-memory.dmp

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memory/4040-6-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-18-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-19-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-20-0x0000000001200000-0x0000000001282000-memory.dmp

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memory/4040-21-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-22-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-23-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-24-0x0000000001200000-0x0000000001282000-memory.dmp

Download

memory/4040-25-0x0000000001200000-0x0000000001282000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads