remcos | 8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10-09-2024 02:04

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General

Target

8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
Size

937KB
MD5

d153584c42340d402d6e44454c3ad5b2
SHA1

e14bfbe2f059a26e75755e29f032c5e0d3cf673c
SHA256

8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38
SHA512

599b52b887b1c71515ec37ac072b4201a5fa023445b88390a6af0d7e51c90b4d71e02e6c273982efd45f4f2c781fd1608eff5d916968d7c70b06be0b103b33f9
SSDEEP

24576:/iUmSB/o5d1ubcvq/q9JwVZeYc+V8leByGrKzp6B3IjM://mU/ohubcvq/2wVZee8leDrKzp638

Score

10^/10

remcos remotehost collection credential_access discovery evasion rat stealer trojan upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

system6233.duckdns.org:3045

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
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-HSZZPP
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

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

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/4728-58-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3568-61-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/5004-66-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4728-60-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3568-57-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4728-68-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3568-61-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3568-57-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4728-58-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4728-60-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4728-68-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4536-0-0x00000000002B0000-0x00000000004B1000-memory.dmp	upx
behavioral2/memory/4536-16-0x00000000002B0000-0x00000000004B1000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4536-16-0x00000000002B0000-0x00000000004B1000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4536 set thread context of 3628	4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe	90
PID 3628 set thread context of 4728	3628	svchost.exe	99
PID 3628 set thread context of 3568	3628	svchost.exe	100
PID 3628 set thread context of 5004	3628	svchost.exe	101

System Location Discovery: System Language Discovery 1 TTPs 7 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.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	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2600	reg.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4728	svchost.exe
4728	svchost.exe
5004	svchost.exe
5004	svchost.exe
4728	svchost.exe
4728	svchost.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
3628	svchost.exe
3628	svchost.exe
3628	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5004	svchost.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe

Suspicious use of SendNotifyMessage 5 IoCs

pid	Process
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3628	svchost.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4536 wrote to memory of 3628	4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe	90
PID 4536 wrote to memory of 3628	4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe	90
PID 4536 wrote to memory of 3628	4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe	90
PID 4536 wrote to memory of 3628	4536	8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe	90
PID 3628 wrote to memory of 2252	3628	svchost.exe	91
PID 3628 wrote to memory of 2252	3628	svchost.exe	91
PID 3628 wrote to memory of 2252	3628	svchost.exe	91
PID 2252 wrote to memory of 2600	2252	cmd.exe	93
PID 2252 wrote to memory of 2600	2252	cmd.exe	93
PID 2252 wrote to memory of 2600	2252	cmd.exe	93
PID 3628 wrote to memory of 4728	3628	svchost.exe	99
PID 3628 wrote to memory of 4728	3628	svchost.exe	99
PID 3628 wrote to memory of 4728	3628	svchost.exe	99
PID 3628 wrote to memory of 4728	3628	svchost.exe	99
PID 3628 wrote to memory of 3568	3628	svchost.exe	100
PID 3628 wrote to memory of 3568	3628	svchost.exe	100
PID 3628 wrote to memory of 3568	3628	svchost.exe	100
PID 3628 wrote to memory of 3568	3628	svchost.exe	100
PID 3628 wrote to memory of 5004	3628	svchost.exe	101
PID 3628 wrote to memory of 5004	3628	svchost.exe	101
PID 3628 wrote to memory of 5004	3628	svchost.exe	101
PID 3628 wrote to memory of 5004	3628	svchost.exe	101

C:\Users\Admin\AppData\Local\Temp\8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe
"C:\Users\Admin\AppData\Local\Temp\8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.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:4536
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\8dd3a8d57533cddb053799ed6f14291ed97042e9209870f8daa0a8eeb9223d38.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3628
- - C:\Windows\SysWOW64\cmd.exe
    /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2252
  - - C:\Windows\SysWOW64\reg.exe
      C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      4⤵
      UAC bypass
      System Location Discovery: System Language Discovery
      Modifies registry key
      PID:2600
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\hqrglaholaet"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4728
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\jswzlssqziwyohh"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3568
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\tmbjmldjnqolqndkje"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
2551c945005945b28dbb4ce94bb3e1c1

SHA1
9a6fecf571727e8381dfa97186c68028f23694c0

SHA256
98333f06a88c1b1b2c335ee1aff5d4b8db0cce0d066f6f72b53da9d50e30d1bc

SHA512
36c5c756af11bacaefcbb868a4703758878b6f0c29e7ad3da15e56bd8314435648cc1d347c59bb1ad662e14f16b18f20ba522529e20150631a5cbad86b1925fe

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

Filesize
4KB

MD5
2538ec9e8425a905937573069b77d4c2

SHA1
ad0c2b7aff4382e23444d26adac96d9697b849f3

SHA256
29338949fae4c88a972837aae898529e4c7a2c4df35982eef2f8d7b602c17f4e

SHA512
a867a471b837b9c662528ee7a5904e8fe7b1eebb277b8a7fe4d4caf423fae914baf692bb5004c02ddb539b157d63326178467e28b03aa92a533cda19155d501c

Download Submit
memory/3568-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3568-57-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3568-61-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3568-55-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3628-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-70-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3628-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-73-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3628-74-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/3628-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3628-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4536-12-0x0000000001750000-0x0000000001754000-memory.dmp

Filesize
16KB

Download
memory/4536-16-0x00000000002B0000-0x00000000004B1000-memory.dmp

Filesize
2.0MB

Download
memory/4536-0-0x00000000002B0000-0x00000000004B1000-memory.dmp

Filesize
2.0MB

Download
memory/4728-68-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4728-60-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4728-58-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4728-56-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4728-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5004-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5004-62-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5004-66-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download