remcos | d193e7a9fd8efda208f3f41d4cfd648f6d006760bcaa5fc73defccfb2467d8fb

Analysis

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

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-01-2025 14:47

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General

Target

wbohwn.ps1
Size

714KB
MD5

60a213921a4809113c2e0926e1e36140
SHA1

2b8dd9185550a4ec909e39cbb89e9929ab6b4c98
SHA256

d193e7a9fd8efda208f3f41d4cfd648f6d006760bcaa5fc73defccfb2467d8fb
SHA512

77f4e8832869821e18ea556bb387aa4ee428a1d78ba15135d43009e96644f2df83eb924bc66e7b8598d9be8ff96a6be8beb974ed8391db6aa8e8baa2efb50dd0
SSDEEP

12288:QE0OaSnp18r3XvPiwE715Ni5I0u4WmwZUI+WmLvK7VxwdOWn0dkVLWi0Mr9LAcC+:2SpW9w1Ou4WmwZ9GewQdXxMr9scC+

Score

10^/10

remcos remotehost collection discovery execution rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

154.216.19.243:50417

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-UG4F0K
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/4948-55-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/220-56-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/532-58-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/220-56-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4948-55-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Executes dropped EXE 1 IoCs

pid	Process
3484	x.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	RegAsm.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3484 set thread context of 4648	3484	x.exe	84
PID 4648 set thread context of 4948	4648	RegAsm.exe	87
PID 4648 set thread context of 220	4648	RegAsm.exe	88
PID 4648 set thread context of 532	4648	RegAsm.exe	89

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3272	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	x.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3272	powershell.exe
3272	powershell.exe
4948	RegAsm.exe
4948	RegAsm.exe
532	RegAsm.exe
532	RegAsm.exe
4948	RegAsm.exe
4948	RegAsm.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4648	RegAsm.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4648	RegAsm.exe
4648	RegAsm.exe
4648	RegAsm.exe
4648	RegAsm.exe
4648	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3272	powershell.exe
Token: SeDebugPrivilege	532	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4648	RegAsm.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 3272 wrote to memory of 3484	3272	powershell.exe	83
PID 3272 wrote to memory of 3484	3272	powershell.exe	83
PID 3272 wrote to memory of 3484	3272	powershell.exe	83
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 3484 wrote to memory of 4648	3484	x.exe	84
PID 4648 wrote to memory of 3940	4648	RegAsm.exe	85
PID 4648 wrote to memory of 3940	4648	RegAsm.exe	85
PID 4648 wrote to memory of 3940	4648	RegAsm.exe	85
PID 4648 wrote to memory of 5048	4648	RegAsm.exe	86
PID 4648 wrote to memory of 5048	4648	RegAsm.exe	86
PID 4648 wrote to memory of 5048	4648	RegAsm.exe	86
PID 4648 wrote to memory of 4948	4648	RegAsm.exe	87
PID 4648 wrote to memory of 4948	4648	RegAsm.exe	87
PID 4648 wrote to memory of 4948	4648	RegAsm.exe	87
PID 4648 wrote to memory of 4948	4648	RegAsm.exe	87
PID 4648 wrote to memory of 220	4648	RegAsm.exe	88
PID 4648 wrote to memory of 220	4648	RegAsm.exe	88
PID 4648 wrote to memory of 220	4648	RegAsm.exe	88
PID 4648 wrote to memory of 220	4648	RegAsm.exe	88
PID 4648 wrote to memory of 532	4648	RegAsm.exe	89
PID 4648 wrote to memory of 532	4648	RegAsm.exe	89
PID 4648 wrote to memory of 532	4648	RegAsm.exe	89
PID 4648 wrote to memory of 532	4648	RegAsm.exe	89

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\wbohwn.ps1
1⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3272
- C:\Users\Admin\AppData\Local\Temp\x.exe
  "C:\Users\Admin\AppData\Local\Temp\x.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3484
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4648
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\unwtvx"
      4⤵
      PID:3940
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\unwtvx"
      4⤵
      PID:5048
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\unwtvx"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4948
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\fhbmwqydcm"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:220
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\hbgewiifyuzjr"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:532

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
3cdd365eb75ff80c45b2fd01ab944402

SHA1
8cf32f6cde89a80a41bb0943bf37aa10e2f77f03

SHA256
15ca1acd7498afd88e0fbf715627b2584d077508492b48d3aa230f763d6d6a8f

SHA512
3ff4556631b68af4fb8d1ff35698af0b7d72525967bdd90b638844e169fc0dcc898e4e5367bc6712292b06bba341a24575f68897d12eb2190f9d7450ef0527f6

Download Submit
C:\ProgramData\remcos\logs.dat

Filesize
230B

MD5
bcab900e05a9f631ee6a8b29ea51da5d

SHA1
ba27f641524c064e5d863682b36102842b81e3f2

SHA256
8c2d322c66d311829231f953fbbe1163b6caea3abe4e120801868a46dc474dd7

SHA512
020ae668e6dec4a62f9727ad9c40eb8928b223cd979987d1e35489e5eb14be1a342d091503c00db7702622b362be5081441bc6e760c483d9e3b6ed3da774c84e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wqw4ty24.bzd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
f1d2c01ce674ad7d5bad04197c371fbc

SHA1
4bf0ed04d156a3dc6c8d27e134ecbda76d3585aa

SHA256
25b006032deccd628940ef728fffe83b325a85de453a34691f55f570e4460094

SHA512
81cb982cc33dcc27600a8a681c3ec3cc5b9221b95baa45e1ab24479745a9638b9f31d7beeeb1128b3294ff69b44e958c75e25d565f66790c364665caff96ee77

Download Submit
C:\Users\Admin\AppData\Local\Temp\x.exe

Filesize
535KB

MD5
c787a2b017df16aa172e2abf3652c00a

SHA1
cddfc70d111237753b428bcb861ed52d1b5c1d21

SHA256
d8713ffe770c1d01afbe51421d91b32d6f0ddd47878c75686851bb8305e41546

SHA512
7c2e819515b5f9408b6503b7d924a4e94ae35e243a8908402ff107eb8d215dcd7feed366ed6e2df8006ca2ed9c931421364b76ef3b21522d261c16c6fe9234f4

Download Submit
memory/220-56-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/220-54-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/220-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/532-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/532-57-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/532-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3272-1-0x000001D143370000-0x000001D143392000-memory.dmp

Filesize
136KB

Download
memory/3272-0-0x00007FFEAEFA3000-0x00007FFEAEFA5000-memory.dmp

Filesize
8KB

Download
memory/3272-11-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/3272-13-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/3272-27-0x00007FFEAEFA0000-0x00007FFEAFA61000-memory.dmp

Filesize
10.8MB

Download
memory/3484-33-0x0000000074EC0000-0x0000000075670000-memory.dmp

Filesize
7.7MB

Download
memory/3484-29-0x0000000074EC0000-0x0000000075670000-memory.dmp

Filesize
7.7MB

Download
memory/3484-28-0x0000000000790000-0x000000000081E000-memory.dmp

Filesize
568KB

Download
memory/3484-26-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

Filesize
4KB

Download
memory/4648-68-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4648-69-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-47-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-108-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-107-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-44-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-43-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-42-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-41-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-100-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-99-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-37-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-39-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-40-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-64-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4648-45-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-34-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-67-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4648-72-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-75-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-74-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-32-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-83-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-84-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-30-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-91-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4648-92-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4948-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4948-53-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4948-55-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4948-48-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download