remcos | 14534f9ecea0edc1d5fd9a220089cdd04dba9a8cf5b70334c5b15e6ad0a4860c

Analysis

max time kernel
148s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
13-09-2024 02:51

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General

Target

invoice.exe
Size

1.4MB
MD5

c9d77c591e284d81a87f54e086515333
SHA1

e69f9859addc81b99703f7bc33fc9680df3b6d43
SHA256

14534f9ecea0edc1d5fd9a220089cdd04dba9a8cf5b70334c5b15e6ad0a4860c
SHA512

f4e5dc9c699d3a93155097ec71419f74c22e5cb96a83f55e0007c81ab93c751631d77462959c2385950d41b2ed43c19f71702c201c8ab412e721bbe76acd668b
SSDEEP

24576:CCdxte/80jYLT3U1jfsWaAK+UbJKRWeSR813Cih0NhTIDiQ:Tw80cTsjkWaAK+UtrRU3uu

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

blakaa.duckdns.org: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-BNY62M
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 9 IoCs

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

resource	yara_rule
behavioral2/memory/3460-28-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4280-29-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3272-33-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4280-32-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3272-31-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3460-30-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3460-35-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4280-34-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3272-42-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3460-28-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3460-30-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3460-35-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3272-33-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3272-31-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3272-42-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2536 set thread context of 4708	2536	invoice.exe	88
PID 4708 set thread context of 3272	4708	svchost.exe	94
PID 4708 set thread context of 3460	4708	svchost.exe	95
PID 4708 set thread context of 4280	4708	svchost.exe	96

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	invoice.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
3272	svchost.exe
3272	svchost.exe
4280	svchost.exe
4280	svchost.exe
3272	svchost.exe
3272	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2536	invoice.exe
4708	svchost.exe
4708	svchost.exe
4708	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4280	svchost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2536	invoice.exe
2536	invoice.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
2536	invoice.exe
2536	invoice.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 4708	2536	invoice.exe	88
PID 2536 wrote to memory of 4708	2536	invoice.exe	88
PID 2536 wrote to memory of 4708	2536	invoice.exe	88
PID 2536 wrote to memory of 4708	2536	invoice.exe	88
PID 4708 wrote to memory of 3272	4708	svchost.exe	94
PID 4708 wrote to memory of 3272	4708	svchost.exe	94
PID 4708 wrote to memory of 3272	4708	svchost.exe	94
PID 4708 wrote to memory of 3272	4708	svchost.exe	94
PID 4708 wrote to memory of 3460	4708	svchost.exe	95
PID 4708 wrote to memory of 3460	4708	svchost.exe	95
PID 4708 wrote to memory of 3460	4708	svchost.exe	95
PID 4708 wrote to memory of 3460	4708	svchost.exe	95
PID 4708 wrote to memory of 4280	4708	svchost.exe	96
PID 4708 wrote to memory of 4280	4708	svchost.exe	96
PID 4708 wrote to memory of 4280	4708	svchost.exe	96
PID 4708 wrote to memory of 4280	4708	svchost.exe	96

C:\Users\Admin\AppData\Local\Temp\invoice.exe
"C:\Users\Admin\AppData\Local\Temp\invoice.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:2536
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\invoice.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4708
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\qkmtbsisw"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3272
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\terlclslsqxj"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3460
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\dgxwvddngypnbbri"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4280

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\qkmtbsisw

Filesize
4KB

MD5
c0ab2847671ed5375328c5127a02cc72

SHA1
dc2bcb51562fb17e5c8787833bc0181d88a5b75e

SHA256
e961f466a0638bc99182d0056245e2d8bf1ccc13a189b802aada981f379e2384

SHA512
0b8b634d21ac71e02cef86687bf84b6fcecfd24dafab8130f42ce8b4b3f308a2e1b1fa7bf8d37f2eda76efae2b30b8d39f41d808d771562d8545ed144241924f

Download Submit
memory/2536-6-0x0000000000D60000-0x0000000001160000-memory.dmp

Filesize
4.0MB

Download
memory/3272-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3272-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3272-19-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3272-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3272-31-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3460-35-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3460-30-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3460-25-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3460-20-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3460-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4280-26-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4280-32-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4280-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4280-22-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4280-29-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4708-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-44-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4708-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-47-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4708-48-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4708-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4708-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download