remcos | 9d531e089d225f7ac68e1f96c5aedd6b624c6eb30a6ce3f7592d05da7dd485a7

Analysis

max time kernel
149s
max time network
146s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-09-2024 02:08

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General

Target

18V4860 TS Light Diesel.exe
Size

881KB
MD5

88ad99bd08e94b721914d8368c3a259b
SHA1

8d6518f2ea260d9835c3ed7190808fc263ed010a
SHA256

4cce5506593907c3db78282849ed41729ca7cf737e1d38cb82dc10e27d92ff16
SHA512

9dece9766da615b5b5b72c1d8167f7c3f54a73d3cc95a024e6b541e7c6c278606d9e8fdba37102cb251ed227a16780630033a6e8dcee9acc075fd417bb8c3e54
SSDEEP

24576:qQ/EymH4hro8jGqj56ulEJ8v+FgFOfY823:3yHGrhGqdFlECv+CX

Score

10^/10

remcos remotehost collection discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

www.drechftankholding.com:2404

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
dfgh
mouse_option
false
mutex
Rmc-8J6PG9
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

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral1/memory/2856-56-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2912-61-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2804-57-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2804-57-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2856-56-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2816	powershell.exe
2568	powershell.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2728 set thread context of 800	2728	18V4860 TS Light Diesel.exe	36
PID 800 set thread context of 2856	800	vbc.exe	37
PID 800 set thread context of 2804	800	vbc.exe	38
PID 800 set thread context of 2912	800	vbc.exe	39

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 8 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	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	18V4860 TS Light Diesel.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
324	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2728	18V4860 TS Light Diesel.exe
2816	powershell.exe
2568	powershell.exe
2728	18V4860 TS Light Diesel.exe
2856	vbc.exe
2856	vbc.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
800	vbc.exe
800	vbc.exe
800	vbc.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	18V4860 TS Light Diesel.exe
Token: SeDebugPrivilege	2816	powershell.exe
Token: SeDebugPrivilege	2568	powershell.exe
Token: SeDebugPrivilege	2912	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
800	vbc.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2728 wrote to memory of 2816	2728	18V4860 TS Light Diesel.exe	30
PID 2728 wrote to memory of 2816	2728	18V4860 TS Light Diesel.exe	30
PID 2728 wrote to memory of 2816	2728	18V4860 TS Light Diesel.exe	30
PID 2728 wrote to memory of 2816	2728	18V4860 TS Light Diesel.exe	30
PID 2728 wrote to memory of 2568	2728	18V4860 TS Light Diesel.exe	32
PID 2728 wrote to memory of 2568	2728	18V4860 TS Light Diesel.exe	32
PID 2728 wrote to memory of 2568	2728	18V4860 TS Light Diesel.exe	32
PID 2728 wrote to memory of 2568	2728	18V4860 TS Light Diesel.exe	32
PID 2728 wrote to memory of 324	2728	18V4860 TS Light Diesel.exe	34
PID 2728 wrote to memory of 324	2728	18V4860 TS Light Diesel.exe	34
PID 2728 wrote to memory of 324	2728	18V4860 TS Light Diesel.exe	34
PID 2728 wrote to memory of 324	2728	18V4860 TS Light Diesel.exe	34
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 2728 wrote to memory of 800	2728	18V4860 TS Light Diesel.exe	36
PID 800 wrote to memory of 2856	800	vbc.exe	37
PID 800 wrote to memory of 2856	800	vbc.exe	37
PID 800 wrote to memory of 2856	800	vbc.exe	37
PID 800 wrote to memory of 2856	800	vbc.exe	37
PID 800 wrote to memory of 2856	800	vbc.exe	37
PID 800 wrote to memory of 2804	800	vbc.exe	38
PID 800 wrote to memory of 2804	800	vbc.exe	38
PID 800 wrote to memory of 2804	800	vbc.exe	38
PID 800 wrote to memory of 2804	800	vbc.exe	38
PID 800 wrote to memory of 2804	800	vbc.exe	38
PID 800 wrote to memory of 2912	800	vbc.exe	39
PID 800 wrote to memory of 2912	800	vbc.exe	39
PID 800 wrote to memory of 2912	800	vbc.exe	39
PID 800 wrote to memory of 2912	800	vbc.exe	39
PID 800 wrote to memory of 2912	800	vbc.exe	39

C:\Users\Admin\AppData\Local\Temp\18V4860 TS Light Diesel.exe
"C:\Users\Admin\AppData\Local\Temp\18V4860 TS Light Diesel.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2728
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\18V4860 TS Light Diesel.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2816
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\PNLFWPpnxTlxjH.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2568
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PNLFWPpnxTlxjH" /XML "C:\Users\Admin\AppData\Local\Temp\tmp983A.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:324
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:800
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\letufitejvquzzozwx"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2856
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\vggmgbdxwdizjfcdninxlm"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2804
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\yalxgtozkmammlyhwsaqozxmj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Scripting

T1064

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Scripting

T1064

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\dfgh\logs.dat

Filesize
144B

MD5
23dd1c6a19befca3576962111b46f5bf

SHA1
edbe2e8f7a3a186a351357da730b5c848823817b

SHA256
08e86e805ff36205ceacde2634fed9ad67f1344cdc29d458b1467045ff24f731

SHA512
c9ad8df5506a4f43ed0a4bcecddedf5d8af69caa9fb9c444168e92c19c71322fb991e46d4195080d36e7091bdcb8223350ae88b93606b7fe56a3459e7fd4b38f

Download Submit
C:\Users\Admin\AppData\Local\Temp\letufitejvquzzozwx

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp983A.tmp

Filesize
1KB

MD5
059d080f82fb72e3c77978bc08dad9c1

SHA1
879498f0266789e9b7848f027a63e3ad1e354fdb

SHA256
0943e7952f0e2930134ae05ad4da363c457bda72259023a0eee4705ddd14968c

SHA512
7a18c1c660c9598f43c8c10a0ea53aac9b3bd360f8838892048600f83958e258d8e3d7fbfd5e719566a14cd8dec0af70b81d00ca76a7e223b40694b41f510543

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
89aa090ff5291fe2bf6ac0937f5187bd

SHA1
8d2fb9d5d832c7383ad9b5aeedf0e36472de2925

SHA256
ea8e857a64baf9d6611bfea5f3db8524443bc6ee53bb5f3fc676042338625a57

SHA512
d6db4b7c99c6b7e213ade2b08805de2c66ba94534fb0f032e146b1dcbef29636dcf76b8fdb3bb55a052b4e306669dbafdc69c1024adaba90f3892e865a564774

Download Submit
memory/800-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-96-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-35-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/800-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-87-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/800-71-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/800-72-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/800-68-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/800-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2728-5-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2728-42-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2728-1-0x0000000000A60000-0x0000000000B42000-memory.dmp

Filesize
904KB

Download
memory/2728-6-0x0000000005620000-0x00000000056E0000-memory.dmp

Filesize
768KB

Download
memory/2728-4-0x0000000073F4E000-0x0000000073F4F000-memory.dmp

Filesize
4KB

Download
memory/2728-2-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2728-3-0x00000000003D0000-0x00000000003E0000-memory.dmp

Filesize
64KB

Download
memory/2728-0-0x0000000073F4E000-0x0000000073F4F000-memory.dmp

Filesize
4KB

Download
memory/2804-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2804-55-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2804-57-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2804-52-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2856-56-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2856-54-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2856-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2912-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2912-60-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2912-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download