remcos | 9726f35d26663a77e4ed6528b2062c651778d6d7852afa60c8c5b6254a4ae67a

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
16-09-2024 01:18

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General

Target

RFQ_pdf.exe
Size

1.9MB
MD5

cca5ff9ed1bf853256cf60a14951b593
SHA1

ab083cbbfca89e9422f8a6f196c248ebc13d738b
SHA256

6a0274af2601d8713f03e1914c9d12cd2537ad6c542242b5b2c458e5915e532d
SHA512

7027f633973c646c1c6db9e44e262e29547a179a30a1ddbcaef9a068591b3192ebf8ad9551785144cae77f3911709320f16c62336dcabc701076ba2598bdfca4
SSDEEP

49152:OTvC/MTQYxsWR7aNYTOcVvAUBlXOOyYvSHzAB:GjTQYxsWRxvv5bK

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

154.216.18.214:2404

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
remcos
mouse_option
false
mutex
Rmc-AOD6MB
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 6 IoCs

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

resource	yara_rule
behavioral2/memory/5000-28-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4976-29-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/5000-22-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3268-30-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4976-21-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4976-32-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5000-28-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/5000-22-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4976-29-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4976-21-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4976-32-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4108 set thread context of 2992	4108	RFQ_pdf.exe	82
PID 2992 set thread context of 4976	2992	svchost.exe	83
PID 2992 set thread context of 5000	2992	svchost.exe	84
PID 2992 set thread context of 3268	2992	svchost.exe	85

System Location Discovery: System Language Discovery 1 TTPs 5 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	RFQ_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4976	svchost.exe
4976	svchost.exe
3268	svchost.exe
3268	svchost.exe
4976	svchost.exe
4976	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4108	RFQ_pdf.exe
2992	svchost.exe
2992	svchost.exe
2992	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3268	svchost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4108	RFQ_pdf.exe
4108	RFQ_pdf.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4108	RFQ_pdf.exe
4108	RFQ_pdf.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4108 wrote to memory of 2992	4108	RFQ_pdf.exe	82
PID 4108 wrote to memory of 2992	4108	RFQ_pdf.exe	82
PID 4108 wrote to memory of 2992	4108	RFQ_pdf.exe	82
PID 4108 wrote to memory of 2992	4108	RFQ_pdf.exe	82
PID 2992 wrote to memory of 4976	2992	svchost.exe	83
PID 2992 wrote to memory of 4976	2992	svchost.exe	83
PID 2992 wrote to memory of 4976	2992	svchost.exe	83
PID 2992 wrote to memory of 4976	2992	svchost.exe	83
PID 2992 wrote to memory of 5000	2992	svchost.exe	84
PID 2992 wrote to memory of 5000	2992	svchost.exe	84
PID 2992 wrote to memory of 5000	2992	svchost.exe	84
PID 2992 wrote to memory of 5000	2992	svchost.exe	84
PID 2992 wrote to memory of 3268	2992	svchost.exe	85
PID 2992 wrote to memory of 3268	2992	svchost.exe	85
PID 2992 wrote to memory of 3268	2992	svchost.exe	85
PID 2992 wrote to memory of 3268	2992	svchost.exe	85

C:\Users\Admin\AppData\Local\Temp\RFQ_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4108
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ_pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2992
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\nknueivbd"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4976
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\xmtefbgdrgwl"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:5000
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\hggxftrxnooyxnh"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3268

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Discovery

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:\Users\Admin\AppData\Local\Temp\nknueivbd

Filesize
4KB

MD5
16f4f7c4051f4bbdaa93a1ca80690065

SHA1
750cacbdd2d089a88119374560d6ac004954e90e

SHA256
6c4559e4413cccaeab73cad48ffd804506c95566e4d6a3f5ae64017a33ea6ec2

SHA512
cb0f68d393ad03a5c802a2978ff7b12e20911bac5e27200c2df16d5d3f63dfc2387c0cd1a9075d8e4ba9ae804a6b61225575e2f42b3ef024e863d5b172417964

Download Submit
memory/2992-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-5-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-6-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-4-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-38-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2992-3-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-34-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2992-37-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3268-30-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3268-23-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3268-25-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4108-2-0x0000000004470000-0x0000000004670000-memory.dmp

Filesize
2.0MB

Download
memory/4976-18-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4976-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4976-29-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4976-15-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4976-21-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5000-22-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5000-17-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5000-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5000-20-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download