remcos | 42013a222c8b3840f8242c0664f46fa3776b9e1cddae157fd208d15ba2c49055

Analysis

max time kernel
143s
max time network
154s
platform
windows11-21h2_x64
resource
win11-20231215-en
resource tags

arch:x64arch:x86image:win11-20231215-enlocale:en-usos:windows11-21h2-x64system
submitted
26/01/2024, 19:24

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General

Target

ballsack e.exe
Size

36KB
MD5

644f18453d3e3874b8cd64374dcebc9e
SHA1

0118997f0114b4a1f090f35d6321d43fe036951a
SHA256

42013a222c8b3840f8242c0664f46fa3776b9e1cddae157fd208d15ba2c49055
SHA512

81bb87a9295587999d9b2661a92615a235084d44dedbf726f7fffc3db693d42847e85ca9cf4420297214120703e291bef29be9f3b057f9851acaf45f0e32b31e
SSDEEP

768:PNnmZ/8vPlLUdhfJ8v6utFpVsuRregrWChgzub7Dsr1:Fnwu4DejVLyOhgzuYr

Score

10^/10

remcos host evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

shall-someone.gl.at.ply.gg:60408

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
jeava.exe
copy_folder
jdk683623
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%WinDir%\System32
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
vindevs
keylog_path
%AppData%
mouse_option
true
mutex
remcos_kixjmsbwpikjkoa
screenshot_crypt
true
screenshot_flag
true
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
60
startup_value
Dlscord
take_screenshot_option
false
take_screenshot_time
5

Signatures

Modifies WinLogon for persistence 2 TTPs 4 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	jeava.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	jeava.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	ballsack e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	ballsack e.exe

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

UAC bypass 3 TTPs 2 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	ballsack e.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	jeava.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Dlscord = "\"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	ballsack e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	jeava.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Dlscord = "\"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	jeava.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	ballsack e.exe

Executes dropped EXE 1 IoCs

pid	Process
1736	jeava.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Dlscord = "\"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	ballsack e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3213149797-706813642-929964373-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dlscord = "\"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	jeava.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Dlscord = "\"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	jeava.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3213149797-706813642-929964373-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dlscord = "\"C:\\Windows\\SysWOW64\\jdk683623\\jeava.exe\""	ballsack e.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	ballsack e.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	jeava.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\jdk683623\jeava.exe	ballsack e.exe
File opened for modification	C:\Windows\SysWOW64\jdk683623	ballsack e.exe
File created	C:\Windows\SysWOW64\jdk683623\jeava.exe	ballsack e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1736 set thread context of 2056	1736	jeava.exe	87

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

pid	Process
948	reg.exe
4848	reg.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4780	PING.EXE

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2568 wrote to memory of 248	2568	ballsack e.exe	79
PID 2568 wrote to memory of 248	2568	ballsack e.exe	79
PID 2568 wrote to memory of 248	2568	ballsack e.exe	79
PID 248 wrote to memory of 948	248	cmd.exe	81
PID 248 wrote to memory of 948	248	cmd.exe	81
PID 248 wrote to memory of 948	248	cmd.exe	81
PID 2568 wrote to memory of 3884	2568	ballsack e.exe	82
PID 2568 wrote to memory of 3884	2568	ballsack e.exe	82
PID 2568 wrote to memory of 3884	2568	ballsack e.exe	82
PID 3884 wrote to memory of 4780	3884	cmd.exe	84
PID 3884 wrote to memory of 4780	3884	cmd.exe	84
PID 3884 wrote to memory of 4780	3884	cmd.exe	84
PID 3884 wrote to memory of 1736	3884	cmd.exe	85
PID 3884 wrote to memory of 1736	3884	cmd.exe	85
PID 3884 wrote to memory of 1736	3884	cmd.exe	85
PID 1736 wrote to memory of 1760	1736	jeava.exe	86
PID 1736 wrote to memory of 1760	1736	jeava.exe	86
PID 1736 wrote to memory of 1760	1736	jeava.exe	86
PID 1736 wrote to memory of 2056	1736	jeava.exe	87
PID 1736 wrote to memory of 2056	1736	jeava.exe	87
PID 1736 wrote to memory of 2056	1736	jeava.exe	87
PID 1736 wrote to memory of 2056	1736	jeava.exe	87
PID 1736 wrote to memory of 2056	1736	jeava.exe	87
PID 1736 wrote to memory of 2056	1736	jeava.exe	87
PID 1736 wrote to memory of 2056	1736	jeava.exe	87
PID 1736 wrote to memory of 2056	1736	jeava.exe	87
PID 1760 wrote to memory of 4848	1760	cmd.exe	89
PID 1760 wrote to memory of 4848	1760	cmd.exe	89
PID 1760 wrote to memory of 4848	1760	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\ballsack e.exe
"C:\Users\Admin\AppData\Local\Temp\ballsack e.exe"
1⤵
- Modifies WinLogon for persistence
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Adds policy Run key to start application
- Adds Run key to start application
- Modifies WinLogon
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2568
- C:\Windows\SysWOW64\cmd.exe
  /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:248
- - C:\Windows\SysWOW64\reg.exe
    C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - Modifies registry key
    PID:948
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3884
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:4780
- - C:\Windows\SysWOW64\jdk683623\jeava.exe
    "C:\Windows\SysWOW64\jdk683623\jeava.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Identifies VirtualBox via ACPI registry values (likely anti-VM)
    - Adds policy Run key to start application
    - Executes dropped EXE
    - Adds Run key to start application
    - Modifies WinLogon
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1736
  - - C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1760
    - - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        UAC bypass
        Modifies registry key
        
        PID:4848
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      4⤵
      PID:2056

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

Winlogon Helper DLL

T1547.004

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.bat

Filesize
90B

MD5
d261161d84c1119ba526b75df8123299

SHA1
8e11e70f6d31c781f389f892c8330b61bd1ff370

SHA256
a3e8bb0a185943fd76d014d2ed0d2dcc33153fbb87bb952304674feaeaeb22a5

SHA512
ff9b8b5d21460a245574425d95d9e9a6b2c2350b313e8108bf5c8f66519eca5f2160e52ee49b6460a69b6fdccc9f926c2cd9e967ba0a40f490a9aed69cc5d351

Download Submit
C:\Windows\SysWOW64\jdk683623\jeava.exe

Filesize
36KB

MD5
644f18453d3e3874b8cd64374dcebc9e

SHA1
0118997f0114b4a1f090f35d6321d43fe036951a

SHA256
42013a222c8b3840f8242c0664f46fa3776b9e1cddae157fd208d15ba2c49055

SHA512
81bb87a9295587999d9b2661a92615a235084d44dedbf726f7fffc3db693d42847e85ca9cf4420297214120703e291bef29be9f3b057f9851acaf45f0e32b31e

Download Submit
memory/1736-12-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2568-0-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2568-6-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads