remcos | 5772d8ef6cfb846163c13d03211610c277a424242fb64bb74479a9c77db8b1bc

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
18/07/2024, 07:28

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General

Target
MalwareBazaar.exe
Size 1.6MB
Sample240718-jarn1asalf
SHA256 5772d8ef6cfb846163c13d03211610c277a424242fb64bb74479a9c77db8b1bc
MD5 102341d3e19e448fa1950f9e8e478e4b
SHA1 7159df9ae33826ec81a8a25bf1beec35b4785933
SHA512 e86048f9659faeb03a5a98711b380a4e0a80915ebdd521a39976487b043183474a50659a205cb41326b31581df6b88f4fc5ebb23744d0d1b4a2113455227ec0a
SSDEEP 24576:a6nVMk+HIj90c6kkdWTyTeLA45DopywfIPQZ3YqjgM+9clJUuiTs0bydWy2UE43+:ZVz7t11TAEAmDqR5YDM+982lPW2LukuA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos riches evasion execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RICHES

75.127.7.188:2404

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Intel22.exe
copy_folder
Intel22
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
intel22
keylog_path
%AppData%
mouse_option
false
mutex
Rmc-D3CYN5
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

Command and Scripting Interpreter: PowerShell 1 TTPs 11 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1140	powershell.exe
1608	powershell.exe
5080	powershell.exe
1544	powershell.exe
1924	powershell.exe
2956	powershell.exe
4168	powershell.exe
696	powershell.exe
3092	powershell.exe
4940	powershell.exe
2808	powershell.exe

Disables Task Manager via registry modification
evasion

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	MalwareBazaar.exe
Key value queried	\REGISTRY\USER\S-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	jpxo.txt

Executes dropped EXE 2 IoCs

pid	Process
4604	jpxo.txt
2952	RegSvcs.exe

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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\vclr\\JPXOTX~1.EXE C:\\Users\\Admin\\AppData\\Roaming\\vclr\\EQAHET~1.TXT"	jpxo.txt

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4604 set thread context of 2952	4604	jpxo.txt	119

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

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
4644	ipconfig.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-384068567-2943195810-3631207890-1000_Classes\Local Settings	MalwareBazaar.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
1140	powershell.exe
1140	powershell.exe
4168	powershell.exe
4168	powershell.exe
1608	powershell.exe
1608	powershell.exe
5080	powershell.exe
5080	powershell.exe
696	powershell.exe
696	powershell.exe
1544	powershell.exe
1544	powershell.exe
1140	powershell.exe
1608	powershell.exe
5080	powershell.exe
4168	powershell.exe
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
696	powershell.exe
1544	powershell.exe
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt
4604	jpxo.txt

Suspicious use of AdjustPrivilegeToken 11 IoCs

description	pid	Process
Token: SeDebugPrivilege	4168	powershell.exe
Token: SeDebugPrivilege	1608	powershell.exe
Token: SeDebugPrivilege	1140	powershell.exe
Token: SeDebugPrivilege	5080	powershell.exe
Token: SeDebugPrivilege	696	powershell.exe
Token: SeDebugPrivilege	1544	powershell.exe
Token: SeDebugPrivilege	3092	powershell.exe
Token: SeDebugPrivilege	2808	powershell.exe
Token: SeDebugPrivilege	1924	powershell.exe
Token: SeDebugPrivilege	4940	powershell.exe
Token: SeDebugPrivilege	2956	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2952	RegSvcs.exe

Suspicious use of WriteProcessMemory 59 IoCs

description	pid	Process	procid_target
PID 1408 wrote to memory of 1672	1408	MalwareBazaar.exe	87
PID 1408 wrote to memory of 1672	1408	MalwareBazaar.exe	87
PID 1408 wrote to memory of 1672	1408	MalwareBazaar.exe	87
PID 1672 wrote to memory of 1752	1672	WScript.exe	94
PID 1672 wrote to memory of 1752	1672	WScript.exe	94
PID 1672 wrote to memory of 1752	1672	WScript.exe	94
PID 1672 wrote to memory of 3068	1672	WScript.exe	96
PID 1672 wrote to memory of 3068	1672	WScript.exe	96
PID 1672 wrote to memory of 3068	1672	WScript.exe	96
PID 1752 wrote to memory of 4644	1752	cmd.exe	98
PID 1752 wrote to memory of 4644	1752	cmd.exe	98
PID 1752 wrote to memory of 4644	1752	cmd.exe	98
PID 3068 wrote to memory of 4604	3068	cmd.exe	99
PID 3068 wrote to memory of 4604	3068	cmd.exe	99
PID 3068 wrote to memory of 4604	3068	cmd.exe	99
PID 4604 wrote to memory of 1140	4604	jpxo.txt	100
PID 4604 wrote to memory of 1140	4604	jpxo.txt	100
PID 4604 wrote to memory of 1140	4604	jpxo.txt	100
PID 4604 wrote to memory of 4168	4604	jpxo.txt	102
PID 4604 wrote to memory of 4168	4604	jpxo.txt	102
PID 4604 wrote to memory of 4168	4604	jpxo.txt	102
PID 4604 wrote to memory of 1608	4604	jpxo.txt	104
PID 4604 wrote to memory of 1608	4604	jpxo.txt	104
PID 4604 wrote to memory of 1608	4604	jpxo.txt	104
PID 4604 wrote to memory of 5080	4604	jpxo.txt	106
PID 4604 wrote to memory of 5080	4604	jpxo.txt	106
PID 4604 wrote to memory of 5080	4604	jpxo.txt	106
PID 4604 wrote to memory of 696	4604	jpxo.txt	108
PID 4604 wrote to memory of 696	4604	jpxo.txt	108
PID 4604 wrote to memory of 696	4604	jpxo.txt	108
PID 4604 wrote to memory of 1544	4604	jpxo.txt	110
PID 4604 wrote to memory of 1544	4604	jpxo.txt	110
PID 4604 wrote to memory of 1544	4604	jpxo.txt	110
PID 4604 wrote to memory of 2740	4604	jpxo.txt	112
PID 4604 wrote to memory of 2740	4604	jpxo.txt	112
PID 4604 wrote to memory of 2740	4604	jpxo.txt	112
PID 1672 wrote to memory of 2772	1672	WScript.exe	113
PID 1672 wrote to memory of 2772	1672	WScript.exe	113
PID 1672 wrote to memory of 2772	1672	WScript.exe	113
PID 4168 wrote to memory of 3092	4168	powershell.exe	116
PID 4168 wrote to memory of 3092	4168	powershell.exe	116
PID 4168 wrote to memory of 3092	4168	powershell.exe	116
PID 5080 wrote to memory of 4940	5080	powershell.exe	117
PID 5080 wrote to memory of 4940	5080	powershell.exe	117
PID 5080 wrote to memory of 4940	5080	powershell.exe	117
PID 1608 wrote to memory of 2808	1608	powershell.exe	118
PID 1608 wrote to memory of 2808	1608	powershell.exe	118
PID 1608 wrote to memory of 2808	1608	powershell.exe	118
PID 4604 wrote to memory of 2952	4604	jpxo.txt	119
PID 4604 wrote to memory of 2952	4604	jpxo.txt	119
PID 4604 wrote to memory of 2952	4604	jpxo.txt	119
PID 696 wrote to memory of 1924	696	powershell.exe	120
PID 696 wrote to memory of 1924	696	powershell.exe	120
PID 696 wrote to memory of 1924	696	powershell.exe	120
PID 1544 wrote to memory of 2956	1544	powershell.exe	121
PID 1544 wrote to memory of 2956	1544	powershell.exe	121
PID 1544 wrote to memory of 2956	1544	powershell.exe	121
PID 4604 wrote to memory of 2952	4604	jpxo.txt	119
PID 4604 wrote to memory of 2952	4604	jpxo.txt	119

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1408
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\rcmr.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:1672
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c ipconfig /release
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1752
  - - C:\Windows\SysWOW64\ipconfig.exe
      ipconfig /release
      4⤵
      Gathers network information
      PID:4644
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c jpxo.txt eqahetgik.txt
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3068
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX0\jpxo.txt
      jpxo.txt eqahetgik.txt
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:4604
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\RarSFX0
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1140
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionProcess 'RegSvcs.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:4168
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionProcess RegSvcs.exe
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:3092
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionExtension '.vbs'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1608
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionExtension .vbs
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:2808
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionExtension '.vbe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:5080
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionExtension .vbe
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:4940
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionExtension '*.vbs'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:696
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionExtension *.vbs
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:1924
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" powershell -Command Add-MpPreference -ExclusionExtension '*.vbe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1544
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionExtension *.vbe
        6⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious use of AdjustPrivilegeToken
        
        PID:2956
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /c schtasks /create /sc minute /mo 30 /tn WindowsRepaire /tr "C:\Users\Admin\AppData\Roaming\vclr\JPXOTX~1.EXE C:\Users\Admin\AppData\Roaming\vclr\EQAHET~1.TXT"
        5⤵
        
        PID:2740
    - - C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
        
        "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        
        PID:2952
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c ipconfig /renew
    3⤵
    PID:2772

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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