remcos | 8c6bf7d9d90eae709190307238491d5bd875e5a71971b01ec37d1820592f3158

Analysis

max time kernel
149s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26-08-2024 15:29

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General

Target

INQUIRY#46789-AUG24.exe
Size

961KB
MD5

6739731d73cfc53f4ada4d0b5c406a4d
SHA1

1eccbca184fb95f7b04ad40a489ab4e22bf82015
SHA256

201dce891b1e5559e3126c5fb3fd7eb2c417455c2e4e04f6d613e3f7a12f4dba
SHA512

b62bfbe28745c976bc57719e902a89e89739c22dfb675014d4b817e477a9ce135476da04c5c1af87b4b9d2f189f84a3f7c97ed71c638920f6cdc67a0c15f2bcc
SSDEEP

24576:+KP1msLs5bdXuurDNfGwVy9Q4c3eANIlExWyT:dP1mUsBrRO6sQptNISd

Score

10^/10

remcos client collection credential_access discovery persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

CLIENT

64.188.18.85:4455

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
xlorers.exe
copy_folder
xlorers
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-WMLC0E
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
behavioral2/memory/2568-57-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/5024-62-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3764-56-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2568-57-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3764-56-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	INQUIRY#46789-AUG24.exe

Executes dropped EXE 7 IoCs

pid	Process
548	xlorers.exe
4628	xlorers.exe
1216	xlorers.exe
3764	xlorers.exe
2568	xlorers.exe
1260	xlorers.exe
5024	xlorers.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	xlorers.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-WMLC0E = "\"C:\\ProgramData\\xlorers\\xlorers.exe\""	INQUIRY#46789-AUG24.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-WMLC0E = "\"C:\\ProgramData\\xlorers\\xlorers.exe\""	INQUIRY#46789-AUG24.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-WMLC0E = "\"C:\\ProgramData\\xlorers\\xlorers.exe\""	xlorers.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-WMLC0E = "\"C:\\ProgramData\\xlorers\\xlorers.exe\""	xlorers.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 4280 set thread context of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 548 set thread context of 4628	548	xlorers.exe	102
PID 4628 set thread context of 3764	4628	xlorers.exe	105
PID 4628 set thread context of 2568	4628	xlorers.exe	106
PID 4628 set thread context of 5024	4628	xlorers.exe	108

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 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	xlorers.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xlorers.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xlorers.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xlorers.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	INQUIRY#46789-AUG24.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	INQUIRY#46789-AUG24.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xlorers.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
4280	INQUIRY#46789-AUG24.exe
4280	INQUIRY#46789-AUG24.exe
4280	INQUIRY#46789-AUG24.exe
4280	INQUIRY#46789-AUG24.exe
4280	INQUIRY#46789-AUG24.exe
4280	INQUIRY#46789-AUG24.exe
4280	INQUIRY#46789-AUG24.exe
4280	INQUIRY#46789-AUG24.exe
548	xlorers.exe
548	xlorers.exe
548	xlorers.exe
548	xlorers.exe
548	xlorers.exe
548	xlorers.exe
3764	xlorers.exe
3764	xlorers.exe
5024	xlorers.exe
5024	xlorers.exe
3764	xlorers.exe
3764	xlorers.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4628	xlorers.exe
4628	xlorers.exe
4628	xlorers.exe
4628	xlorers.exe
4628	xlorers.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4280	INQUIRY#46789-AUG24.exe
Token: SeDebugPrivilege	548	xlorers.exe
Token: SeDebugPrivilege	5024	xlorers.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 4280 wrote to memory of 1952	4280	INQUIRY#46789-AUG24.exe	96
PID 4280 wrote to memory of 1952	4280	INQUIRY#46789-AUG24.exe	96
PID 4280 wrote to memory of 1952	4280	INQUIRY#46789-AUG24.exe	96
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 4280 wrote to memory of 2524	4280	INQUIRY#46789-AUG24.exe	97
PID 2524 wrote to memory of 548	2524	INQUIRY#46789-AUG24.exe	98
PID 2524 wrote to memory of 548	2524	INQUIRY#46789-AUG24.exe	98
PID 2524 wrote to memory of 548	2524	INQUIRY#46789-AUG24.exe	98
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 548 wrote to memory of 4628	548	xlorers.exe	102
PID 4628 wrote to memory of 1216	4628	xlorers.exe	104
PID 4628 wrote to memory of 1216	4628	xlorers.exe	104
PID 4628 wrote to memory of 1216	4628	xlorers.exe	104
PID 4628 wrote to memory of 3764	4628	xlorers.exe	105
PID 4628 wrote to memory of 3764	4628	xlorers.exe	105
PID 4628 wrote to memory of 3764	4628	xlorers.exe	105
PID 4628 wrote to memory of 3764	4628	xlorers.exe	105
PID 4628 wrote to memory of 2568	4628	xlorers.exe	106
PID 4628 wrote to memory of 2568	4628	xlorers.exe	106
PID 4628 wrote to memory of 2568	4628	xlorers.exe	106
PID 4628 wrote to memory of 2568	4628	xlorers.exe	106
PID 4628 wrote to memory of 1260	4628	xlorers.exe	107
PID 4628 wrote to memory of 1260	4628	xlorers.exe	107
PID 4628 wrote to memory of 1260	4628	xlorers.exe	107
PID 4628 wrote to memory of 5024	4628	xlorers.exe	108
PID 4628 wrote to memory of 5024	4628	xlorers.exe	108
PID 4628 wrote to memory of 5024	4628	xlorers.exe	108
PID 4628 wrote to memory of 5024	4628	xlorers.exe	108

C:\Users\Admin\AppData\Local\Temp\INQUIRY#46789-AUG24.exe
"C:\Users\Admin\AppData\Local\Temp\INQUIRY#46789-AUG24.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Users\Admin\AppData\Local\Temp\INQUIRY#46789-AUG24.exe
  "C:\Users\Admin\AppData\Local\Temp\INQUIRY#46789-AUG24.exe"
  2⤵
  PID:1952
- C:\Users\Admin\AppData\Local\Temp\INQUIRY#46789-AUG24.exe
  "C:\Users\Admin\AppData\Local\Temp\INQUIRY#46789-AUG24.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2524
- - C:\ProgramData\xlorers\xlorers.exe
    "C:\ProgramData\xlorers\xlorers.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:548
  - - C:\ProgramData\xlorers\xlorers.exe
      "C:\ProgramData\xlorers\xlorers.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:4628
    - - C:\ProgramData\xlorers\xlorers.exe
        
        C:\ProgramData\xlorers\xlorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\knqbk"
        5⤵
        Executes dropped EXE
        
        PID:1216
    - - C:\ProgramData\xlorers\xlorers.exe
        
        C:\ProgramData\xlorers\xlorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\knqbk"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        
        PID:3764
    - - C:\ProgramData\xlorers\xlorers.exe
        
        C:\ProgramData\xlorers\xlorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\vpvmlxpn"
        5⤵
        Executes dropped EXE
        Accesses Microsoft Outlook accounts
        System Location Discovery: System Language Discovery
        
        PID:2568
    - - C:\ProgramData\xlorers\xlorers.exe
        
        C:\ProgramData\xlorers\xlorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\xkbeeqzpfbh"
        5⤵
        Executes dropped EXE
        
        PID:1260
    - - C:\ProgramData\xlorers\xlorers.exe
        
        C:\ProgramData\xlorers\xlorers.exe /stext "C:\Users\Admin\AppData\Local\Temp\xkbeeqzpfbh"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:5024

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\xlorers\xlorers.exe

Filesize
961KB

MD5
6739731d73cfc53f4ada4d0b5c406a4d

SHA1
1eccbca184fb95f7b04ad40a489ab4e22bf82015

SHA256
201dce891b1e5559e3126c5fb3fd7eb2c417455c2e4e04f6d613e3f7a12f4dba

SHA512
b62bfbe28745c976bc57719e902a89e89739c22dfb675014d4b817e477a9ce135476da04c5c1af87b4b9d2f189f84a3f7c97ed71c638920f6cdc67a0c15f2bcc

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

Filesize
4KB

MD5
1891919175c888ce82e9bd8a047b01ad

SHA1
502a6892a5d27ecb791ac5aa6d8586944f540453

SHA256
a6c43b4e4b8681cf0ef56c49c730fa77e34dc82db0260253a3ba75039030b9ec

SHA512
8bb940050b1abf6c27db133ed446f41e108f670f361ed5102408832ce33d9b87cd0880723441f1632292eeeb0a319c4e0fac0ea659eb55ebe1130cc3e6c776a3

Download Submit
memory/548-40-0x0000000074960000-0x0000000075110000-memory.dmp

Filesize
7.7MB

Download
memory/548-33-0x0000000074960000-0x0000000075110000-memory.dmp

Filesize
7.7MB

Download
memory/548-32-0x000000007496E000-0x000000007496F000-memory.dmp

Filesize
4KB

Download
memory/548-31-0x0000000074960000-0x0000000075110000-memory.dmp

Filesize
7.7MB

Download
memory/548-30-0x000000007496E000-0x000000007496F000-memory.dmp

Filesize
4KB

Download
memory/2524-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2524-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2524-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2524-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2524-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2568-52-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2568-57-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2568-55-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3764-54-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3764-50-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3764-56-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4280-18-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/4280-6-0x00000000058C0000-0x000000000595C000-memory.dmp

Filesize
624KB

Download
memory/4280-5-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/4280-4-0x0000000005670000-0x000000000567A000-memory.dmp

Filesize
40KB

Download
memory/4280-3-0x00000000055A0000-0x0000000005632000-memory.dmp

Filesize
584KB

Download
memory/4280-2-0x0000000005C50000-0x00000000061F4000-memory.dmp

Filesize
5.6MB

Download
memory/4280-8-0x000000007508E000-0x000000007508F000-memory.dmp

Filesize
4KB

Download
memory/4280-0-0x000000007508E000-0x000000007508F000-memory.dmp

Filesize
4KB

Download
memory/4280-1-0x0000000000B20000-0x0000000000C16000-memory.dmp

Filesize
984KB

Download
memory/4280-7-0x0000000005A70000-0x0000000005A8A000-memory.dmp

Filesize
104KB

Download
memory/4280-11-0x0000000009020000-0x00000000090E0000-memory.dmp

Filesize
768KB

Download
memory/4280-9-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/4280-10-0x0000000005AE0000-0x0000000005AF0000-memory.dmp

Filesize
64KB

Download
memory/4628-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-68-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4628-71-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4628-72-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4628-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4628-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5024-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5024-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5024-62-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download