remcos | 42853671b2f32b3e080fcaf656df74114cac418564f39f8e9a73b9056a53ba4e

Analysis

max time kernel
147s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 13:29

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General

Target
42853671b2f32b3e080fcaf656df74114cac418564f39f8e9a73b9056a53ba4e.dll
Size 3.5MB
Sample240608-qrm6gach63
SHA256 42853671b2f32b3e080fcaf656df74114cac418564f39f8e9a73b9056a53ba4e
MD5 863ce6d190e060eaca78c950a45dd093
SHA1 dec54e4a386ee29fd8a29ea9ed8af8b1dd8972c6
SHA512 8e4fd8e88be167f0fe57fa6cdfc422520264d8c892b3ff38024b2df5bfeb4292b06eaa4fd44393fabe9c83d03b9884c6b43427944e1ab8f524a868c1a8862cc2
SSDEEP 49152:u5Xob/BJCgLzDdwd9bk/RiF6xQf2V4dJgqjEBa/rsVQ9:4A/BSY/RiAxpV0dqa/6C
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

193.142.146.101:2404

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-CRDKO0
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-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*ChromeUpdate = "rundll32.exe C:\\Users\\Admin\\Documents\\FirefoxData.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1488	regsvr32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3908	regsvr32.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4668 wrote to memory of 1488	4668	regsvr32.exe	82
PID 4668 wrote to memory of 1488	4668	regsvr32.exe	82
PID 4668 wrote to memory of 1488	4668	regsvr32.exe	82
PID 1488 wrote to memory of 3908	1488	regsvr32.exe	93
PID 1488 wrote to memory of 3908	1488	regsvr32.exe	93
PID 1488 wrote to memory of 3908	1488	regsvr32.exe	93
PID 1488 wrote to memory of 3908	1488	regsvr32.exe	93
PID 1488 wrote to memory of 3908	1488	regsvr32.exe	93
PID 1488 wrote to memory of 3908	1488	regsvr32.exe	93
PID 1488 wrote to memory of 116	1488	regsvr32.exe	94
PID 1488 wrote to memory of 116	1488	regsvr32.exe	94
PID 1488 wrote to memory of 116	1488	regsvr32.exe	94
PID 116 wrote to memory of 4988	116	cmd.exe	96
PID 116 wrote to memory of 4988	116	cmd.exe	96
PID 116 wrote to memory of 4988	116	cmd.exe	96

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\42853671b2f32b3e080fcaf656df74114cac418564f39f8e9a73b9056a53ba4e.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4668
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\42853671b2f32b3e080fcaf656df74114cac418564f39f8e9a73b9056a53ba4e.dll
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:1488
- - C:\Windows\SysWOW64\regsvr32.exe
    "C:\Windows\SysWOW64\regsvr32.exe"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:3908
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\FirefoxData.dll",EntryPoint /f & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:116
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\FirefoxData.dll",EntryPoint /f
      4⤵
      Adds Run key to start application
      PID:4988

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

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Downloads

logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 144B
SHA256 81ae9769b4049ee24704ab1f6ee02461eeaf393bc77dba0fd115f2c026edef5e
MD5 035a6f79e307c666189ee44f9738a28a
SHA1 b77a10080789460af6d1945681a6ae9171a4739c
SHA512 7e136830187cb7179130be0ebc181094cf485043b6f50fd2b1075fc279f53e2c7b254ac33ddbbb7a87894555f65bd342a0c8090aa8b789a1db7ccc96d0192467
MD5 SHA1 SHA512

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memory/1488-1-0x0000000010000000-0x0000000010396000-memory.dmp

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memory/1488-0-0x0000000010000000-0x0000000010396000-memory.dmp

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memory/1488-7-0x0000000010000000-0x0000000010396000-memory.dmp

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memory/1488-3-0x0000000010000000-0x0000000010396000-memory.dmp

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memory/1488-2-0x0000000010007000-0x0000000010021000-memory.dmp

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memory/3908-15-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-16-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-8-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-12-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-11-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-9-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-17-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-18-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-19-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-27-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-28-0x00000000006B0000-0x0000000000732000-memory.dmp

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memory/3908-4-0x0000000000740000-0x0000000000741000-memory.dmp

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memory/3908-35-0x00000000006B0000-0x0000000000732000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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