remcos | 9d531e089d225f7ac68e1f96c5aedd6b624c6eb30a6ce3f7592d05da7dd485a7

Analysis

max time kernel
299s
max time network
281s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
20/09/2024, 07:57

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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 credential_access discovery execution rat stealer

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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 3 IoCs

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

resource	yara_rule
behavioral1/memory/2140-72-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1308-68-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2408-67-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1308-68-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2408-67-0x0000000000400000-0x0000000000478000-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
2564	powershell.exe
2592	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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	vbc.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2308 set thread context of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 3036 set thread context of 2408	3036	vbc.exe	40
PID 3036 set thread context of 1308	3036	vbc.exe	41
PID 3036 set thread context of 2140	3036	vbc.exe	42

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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	18V4860 TS Light Diesel.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
2732	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2308	18V4860 TS Light Diesel.exe
2308	18V4860 TS Light Diesel.exe
2592	powershell.exe
2564	powershell.exe
2408	vbc.exe
2408	vbc.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
3036	vbc.exe
3036	vbc.exe
3036	vbc.exe
3036	vbc.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2308	18V4860 TS Light Diesel.exe
Token: SeDebugPrivilege	2592	powershell.exe
Token: SeDebugPrivilege	2564	powershell.exe
Token: SeDebugPrivilege	2140	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3036	vbc.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 2308 wrote to memory of 2564	2308	18V4860 TS Light Diesel.exe	31
PID 2308 wrote to memory of 2564	2308	18V4860 TS Light Diesel.exe	31
PID 2308 wrote to memory of 2564	2308	18V4860 TS Light Diesel.exe	31
PID 2308 wrote to memory of 2564	2308	18V4860 TS Light Diesel.exe	31
PID 2308 wrote to memory of 2592	2308	18V4860 TS Light Diesel.exe	33
PID 2308 wrote to memory of 2592	2308	18V4860 TS Light Diesel.exe	33
PID 2308 wrote to memory of 2592	2308	18V4860 TS Light Diesel.exe	33
PID 2308 wrote to memory of 2592	2308	18V4860 TS Light Diesel.exe	33
PID 2308 wrote to memory of 2732	2308	18V4860 TS Light Diesel.exe	35
PID 2308 wrote to memory of 2732	2308	18V4860 TS Light Diesel.exe	35
PID 2308 wrote to memory of 2732	2308	18V4860 TS Light Diesel.exe	35
PID 2308 wrote to memory of 2732	2308	18V4860 TS Light Diesel.exe	35
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 2308 wrote to memory of 3036	2308	18V4860 TS Light Diesel.exe	37
PID 3036 wrote to memory of 1908	3036	vbc.exe	39
PID 3036 wrote to memory of 1908	3036	vbc.exe	39
PID 3036 wrote to memory of 1908	3036	vbc.exe	39
PID 3036 wrote to memory of 1908	3036	vbc.exe	39
PID 3036 wrote to memory of 2408	3036	vbc.exe	40
PID 3036 wrote to memory of 2408	3036	vbc.exe	40
PID 3036 wrote to memory of 2408	3036	vbc.exe	40
PID 3036 wrote to memory of 2408	3036	vbc.exe	40
PID 3036 wrote to memory of 2408	3036	vbc.exe	40
PID 3036 wrote to memory of 1308	3036	vbc.exe	41
PID 3036 wrote to memory of 1308	3036	vbc.exe	41
PID 3036 wrote to memory of 1308	3036	vbc.exe	41
PID 3036 wrote to memory of 1308	3036	vbc.exe	41
PID 3036 wrote to memory of 1308	3036	vbc.exe	41
PID 3036 wrote to memory of 2140	3036	vbc.exe	42
PID 3036 wrote to memory of 2140	3036	vbc.exe	42
PID 3036 wrote to memory of 2140	3036	vbc.exe	42
PID 3036 wrote to memory of 2140	3036	vbc.exe	42
PID 3036 wrote to memory of 2140	3036	vbc.exe	42

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:2308
- 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:2564
- 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:2592
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PNLFWPpnxTlxjH" /XML "C:\Users\Admin\AppData\Local\Temp\tmp20BA.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2732
- 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:3036
- - 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\tkxbamdbhqshmgj"
    3⤵
    PID:1908
- - 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\tkxbamdbhqshmgj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2408
- - 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\dmcubfovvykuwmxzbe"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:1308
- - 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\gghecxzwjgcyyatckoyqs"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2140

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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

Replay Monitor

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Downloads

C:\ProgramData\dfgh\logs.dat

Filesize
144B

MD5
6000dc78702b4e7f6b5d47c9535151d0

SHA1
959e32d88512e1b786bbdd0316d8e1a28610a55a

SHA256
e607d6b0b6d6d0c3ed815bfbf86234f53c7027f93fa005c15806593775332a66

SHA512
0b5d1fbcf2eb7ad1ee58ee3775d3685023f7701d0626f565f1bbd73494dadbc67612ce7a7c939491686945e26c6a198902c2b883d0a878ea2582301f0b7932db

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp20BA.tmp

Filesize
1KB

MD5
78d0751c7aae4b65a285d9633e87b747

SHA1
621e2452af37dff3c45739e586b70ffef9dd090b

SHA256
20175f0fefff0335ecb1a2868cb8a79631b98b2665f81e0fa7b01d6dcac119dd

SHA512
3056d72064c80501be73b4494e267a1cb67e973c88bbf5629a29671575c94ccb996547f4d856bc35d69aaa2f816a0f2c340c5152a946fa30f7fd8ef1e0e8a6b0

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\ZRSK58161QD03CQ7V3VE.temp

Filesize
7KB

MD5
07d1586935b54e4c4f25a9671dbfc747

SHA1
dddf0c801c211dd9ee0a8584fa5b62de1d8f8ee9

SHA256
3f6bd98b3fd2e672f891dcde8bdd96022edccc38f0a4c8c0139f93df6b99da43

SHA512
15d32eeb5a666810b5a06fb0a3d168b32c2c2ba100f471bab1e59cc71ce6e8b9390c5289a54de5c0113a13786ec119a4ce3abc8006cedb4b54774fdb10417791

Download Submit
memory/1308-66-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1308-64-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1308-68-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2140-72-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2140-71-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2140-70-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2308-5-0x00000000741E0000-0x00000000748CE000-memory.dmp

Filesize
6.9MB

Download
memory/2308-6-0x0000000005450000-0x0000000005510000-memory.dmp

Filesize
768KB

Download
memory/2308-0-0x00000000741EE000-0x00000000741EF000-memory.dmp

Filesize
4KB

Download
memory/2308-4-0x00000000741EE000-0x00000000741EF000-memory.dmp

Filesize
4KB

Download
memory/2308-3-0x0000000000680000-0x0000000000690000-memory.dmp

Filesize
64KB

Download
memory/2308-2-0x00000000741E0000-0x00000000748CE000-memory.dmp

Filesize
6.9MB

Download
memory/2308-42-0x00000000741E0000-0x00000000748CE000-memory.dmp

Filesize
6.9MB

Download
memory/2308-1-0x0000000000800000-0x00000000008E2000-memory.dmp

Filesize
904KB

Download
memory/2408-65-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2408-67-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2408-62-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2408-61-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/3036-35-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/3036-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-80-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3036-83-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3036-84-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3036-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-87-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-110-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-111-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-126-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-127-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-134-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3036-135-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download