remcos | cf2f746640d494a76d3cc2b97271d4df4d7bc04be91890be2158247427142cef

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-12-2024 14:12

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General

Target

cf2f746640d494a76d3cc2b97271d4df4d7bc04be91890be2158247427142cef.dll
Size

45.1MB
MD5

5014b83203bb63491ae03e6d9bb4efb4
SHA1

0af340607edde5cf81bd24da6de6ea227076472b
SHA256

cf2f746640d494a76d3cc2b97271d4df4d7bc04be91890be2158247427142cef
SHA512

4fa9c27822a6a9f177873e5125b4474c9568402710f9cdd2ba9ec25f9eed2575f1c683101c2b2a5f1b9d897bab2df41227aee2e28a043bb813e5dcaface522cd
SSDEEP

786432:gUP7GCGO7t0Srkx/tC0SzIdSwh/WxbpNHQD3trzRpD:gUP7GCG6iSrkx1hSzYsHQD3t/RZ

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

pattreon.duckdns.org:7035

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-BMZF1D
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
Remcos family
remcos

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

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\\ChromeData.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

regsvr32.exe

pid	Process
2592	regsvr32.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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

Processes:

regsvr32.exeregsvr32.execmd.exereg.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

regsvr32.exeregsvr32.execmd.exe

description	pid	Process	procid_target
PID 1860 wrote to memory of 2592	1860	regsvr32.exe	29
PID 1860 wrote to memory of 2592	1860	regsvr32.exe	29
PID 1860 wrote to memory of 2592	1860	regsvr32.exe	29
PID 1860 wrote to memory of 2592	1860	regsvr32.exe	29
PID 1860 wrote to memory of 2592	1860	regsvr32.exe	29
PID 1860 wrote to memory of 2592	1860	regsvr32.exe	29
PID 1860 wrote to memory of 2592	1860	regsvr32.exe	29
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 1308	2592	regsvr32.exe	30
PID 2592 wrote to memory of 2584	2592	regsvr32.exe	31
PID 2592 wrote to memory of 2584	2592	regsvr32.exe	31
PID 2592 wrote to memory of 2584	2592	regsvr32.exe	31
PID 2592 wrote to memory of 2584	2592	regsvr32.exe	31
PID 2584 wrote to memory of 2428	2584	cmd.exe	33
PID 2584 wrote to memory of 2428	2584	cmd.exe	33
PID 2584 wrote to memory of 2428	2584	cmd.exe	33
PID 2584 wrote to memory of 2428	2584	cmd.exe	33

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\cf2f746640d494a76d3cc2b97271d4df4d7bc04be91890be2158247427142cef.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1860
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\cf2f746640d494a76d3cc2b97271d4df4d7bc04be91890be2158247427142cef.dll
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Windows\SysWOW64\regsvr32.exe
    "C:\Windows\SysWOW64\regsvr32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1308
- - 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\ChromeData.dll",EntryPoint /f & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2584
  - - 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\ChromeData.dll",EntryPoint /f
      4⤵
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:2428

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 Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1308-37-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-64-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-9-0x0000000000120000-0x0000000000121000-memory.dmp

Filesize
4KB

Download
memory/1308-7-0x0000000000120000-0x0000000000121000-memory.dmp

Filesize
4KB

Download
memory/1308-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1308-3-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-15-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-16-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-17-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-68-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-13-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-67-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-35-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-65-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-19-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-20-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-21-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-22-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-23-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-24-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-25-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-26-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-27-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-28-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-29-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-30-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-31-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-36-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-33-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-34-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-66-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-12-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-63-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-38-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-39-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-40-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-41-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-42-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-43-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-44-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-45-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-46-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-47-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-48-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-49-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-50-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-51-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-52-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-53-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-54-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-55-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-56-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-57-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-58-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-59-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-60-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-61-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/1308-62-0x0000000000090000-0x0000000000112000-memory.dmp

Filesize
520KB

Download
memory/2592-0-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2592-32-0x00000000102E6000-0x0000000010300000-memory.dmp

Filesize
104KB

Download
memory/2592-18-0x0000000012D6E000-0x0000000012D75000-memory.dmp

Filesize
28KB

Download
memory/2592-11-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2592-2-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2592-1-0x00000000102E6000-0x0000000010300000-memory.dmp

Filesize
104KB

Download