remcos | 199db74699251a30044f0a2e0eadd51cbbee650d61e10b75bd8eb0064c1fef2d

Analysis

max time kernel
149s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-09-2024 14:47

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General

Target

2023 Schedule C.exe
Size

6.1MB
MD5

4864a55cff27f686023456a22371e790
SHA1

6ed30c0371fe167d38411bfa6d720fcdcacc4f4c
SHA256

08c7fb6067acc8ac207d28ab616c9ea5bc0d394956455d6a3eecb73f8010f7a2
SHA512

4bd3a16435cca6ce7a7aa829eb967619a8b7c02598474e634442cffc55935870d54d844a04496bf9c7e8c29c40fae59ac6eb39c8550c091d06a28211491d0bfb
SSDEEP

98304:VZQIM+/nv/CDoAkYwpAa5ge1zZ/jtdZwUkQ:bJCKlA2VKUz

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

privmerkt.com:6042

nwemarkets.com:5290

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-XE94AK
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

Executes dropped EXE 2 IoCs

pid	Process
1092	res_out.exe
2084	res_out.exe

Loads dropped DLL 3 IoCs

pid	Process
2776	2023 Schedule C.exe
2776	2023 Schedule C.exe
1092	res_out.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\*ChromeUpdate = "rundll32.exe C:\\Users\\Admin\\Documents\\FirefoxData.dll,EntryPoint"	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\NostaAshamed = "C:\\Users\\Admin\\Pictures\\NssClipper\\ClipperNss.exe"	res_out.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2168	2023 Schedule C.exe

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 6 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	2023 Schedule C.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2023 Schedule C.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	res_out.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	res_out.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 2776	2168	2023 Schedule C.exe	30
PID 2168 wrote to memory of 2776	2168	2023 Schedule C.exe	30
PID 2168 wrote to memory of 2776	2168	2023 Schedule C.exe	30
PID 2168 wrote to memory of 2776	2168	2023 Schedule C.exe	30
PID 2168 wrote to memory of 2776	2168	2023 Schedule C.exe	30
PID 2168 wrote to memory of 2776	2168	2023 Schedule C.exe	30
PID 2168 wrote to memory of 2776	2168	2023 Schedule C.exe	30
PID 2168 wrote to memory of 1952	2168	2023 Schedule C.exe	31
PID 2168 wrote to memory of 1952	2168	2023 Schedule C.exe	31
PID 2168 wrote to memory of 1952	2168	2023 Schedule C.exe	31
PID 2168 wrote to memory of 1952	2168	2023 Schedule C.exe	31
PID 1952 wrote to memory of 2628	1952	cmd.exe	33
PID 1952 wrote to memory of 2628	1952	cmd.exe	33
PID 1952 wrote to memory of 2628	1952	cmd.exe	33
PID 1952 wrote to memory of 2628	1952	cmd.exe	33
PID 2776 wrote to memory of 1092	2776	2023 Schedule C.exe	35
PID 2776 wrote to memory of 1092	2776	2023 Schedule C.exe	35
PID 2776 wrote to memory of 1092	2776	2023 Schedule C.exe	35
PID 2776 wrote to memory of 1092	2776	2023 Schedule C.exe	35
PID 1092 wrote to memory of 2084	1092	res_out.exe	37
PID 1092 wrote to memory of 2084	1092	res_out.exe	37
PID 1092 wrote to memory of 2084	1092	res_out.exe	37
PID 1092 wrote to memory of 2084	1092	res_out.exe	37
PID 1092 wrote to memory of 2084	1092	res_out.exe	37
PID 1092 wrote to memory of 2084	1092	res_out.exe	37

C:\Users\Admin\AppData\Local\Temp\2023 Schedule C.exe
"C:\Users\Admin\AppData\Local\Temp\2023 Schedule C.exe"
1⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Local\Temp\2023 Schedule C.exe
  "C:\Users\Admin\AppData\Local\Temp\2023 Schedule C.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Users\Admin\AppData\Local\Temp\res_out.exe
    "C:\Users\Admin\AppData\Local\Temp\res_out.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1092
  - - C:\Users\Admin\AppData\Local\Temp\res_out.exe
      "C:\Users\Admin\AppData\Local\Temp\res_out.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2084
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\FirefoxData.dll",EntryPoint /f & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\FirefoxData.dll",EntryPoint /f
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:2628

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

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\res_out.exe

Filesize
4.3MB

MD5
7d1aa3c4ff291fd0b72132e0cffce746

SHA1
5333ec6264b52bfa2da39653bb41d0499779e1cd

SHA256
43fc3b5ab0764c06f9d62ec5f4458c13df381a4334f8019d1906ea76d68e149d

SHA512
f02b6ec4f62f1aabd19a5c784f8e906b0340314da36ec3eae6961ffdb7ace591ed0706121ef168d87ed931f60478b01fe5527d63ff615904fed62ea95ceab936

Download Submit
memory/1092-48-0x0000000000400000-0x0000000000855000-memory.dmp

Filesize
4.3MB

Download
memory/1092-39-0x0000000000400000-0x0000000000855000-memory.dmp

Filesize
4.3MB

Download
memory/1092-40-0x0000000000400000-0x0000000000855000-memory.dmp

Filesize
4.3MB

Download
memory/1092-41-0x0000000000400000-0x0000000000855000-memory.dmp

Filesize
4.3MB

Download
memory/1092-38-0x0000000000400000-0x0000000000855000-memory.dmp

Filesize
4.3MB

Download
memory/1092-49-0x0000000000400000-0x0000000000855000-memory.dmp

Filesize
4.3MB

Download
memory/2084-62-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-74-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-47-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-69-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-65-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-61-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-52-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-51-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-56-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-55-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-54-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-53-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-46-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2084-73-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2084-70-0x00000000001B0000-0x0000000000232000-memory.dmp

Filesize
520KB

Download
memory/2168-12-0x0000000010000000-0x00000000102EF000-memory.dmp

Filesize
2.9MB

Download
memory/2168-26-0x000000001000E000-0x0000000010028000-memory.dmp

Filesize
104KB

Download
memory/2168-1-0x000000001000E000-0x0000000010028000-memory.dmp

Filesize
104KB

Download
memory/2168-3-0x0000000010000000-0x00000000102EF000-memory.dmp

Filesize
2.9MB

Download
memory/2168-4-0x0000000010000000-0x00000000102EF000-memory.dmp

Filesize
2.9MB

Download
memory/2168-2-0x0000000010000000-0x00000000102EF000-memory.dmp

Filesize
2.9MB

Download
memory/2168-0-0x0000000010000000-0x00000000102EF000-memory.dmp

Filesize
2.9MB

Download
memory/2168-15-0x0000000010000000-0x00000000102EF000-memory.dmp

Filesize
2.9MB

Download
memory/2776-9-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2776-37-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-36-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-25-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-22-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-23-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-21-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-20-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-19-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-59-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-60-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-5-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-10-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2776-63-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-18-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-67-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-68-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-14-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-17-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-71-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-72-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-16-0x00000000001C0000-0x0000000000242000-memory.dmp

Filesize
520KB

Download
memory/2776-7-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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