remcos | 68a144f4924faeadeb110c433d7b7afc5383a4c163704916e3e6c52f20bc449b

General

Target

msimg32.dll
Size

2.6MB
MD5

f0c756cfdbef7ffa13cfda91edb1b8d1
SHA1

9b2dd6c7eb954a2364ef2c2a463d152c6afdb7e1
SHA256

68a144f4924faeadeb110c433d7b7afc5383a4c163704916e3e6c52f20bc449b
SHA512

89f7a367a353e73d2afb574443a595f10acf609e3f3014e1fbcdb8dd356f569676dd657d68a575f99dc171a56d834cf4881db00c9331dfb3d2d15642fed12275
SSDEEP

24576:cs17EV86bow9nnlC3RuHTqThZYe4u+k6neB6VOyxRaW5E4Y1PTNKTC9qIljCh/qv:c6Q0R2KMOydY1PTNmCgqjEea4DcnIz7H

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

general7777.duckdns.org:6262

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-C3NHUV
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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
13	2176	rundll32.exe
16	2176	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2990742725-2267136959-192470804-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*ChromeUpdate = "rundll32.exe C:\\Users\\Admin\\Documents\\FirefoxData.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1492	rundll32.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1468 wrote to memory of 1492	1468	rundll32.exe	83
PID 1468 wrote to memory of 1492	1468	rundll32.exe	83
PID 1468 wrote to memory of 1492	1468	rundll32.exe	83
PID 1492 wrote to memory of 2176	1492	rundll32.exe	87
PID 1492 wrote to memory of 2176	1492	rundll32.exe	87
PID 1492 wrote to memory of 2176	1492	rundll32.exe	87
PID 1492 wrote to memory of 2176	1492	rundll32.exe	87
PID 1492 wrote to memory of 2176	1492	rundll32.exe	87
PID 1492 wrote to memory of 2176	1492	rundll32.exe	87
PID 1492 wrote to memory of 1260	1492	rundll32.exe	88
PID 1492 wrote to memory of 1260	1492	rundll32.exe	88
PID 1492 wrote to memory of 1260	1492	rundll32.exe	88
PID 1260 wrote to memory of 3444	1260	cmd.exe	90
PID 1260 wrote to memory of 3444	1260	cmd.exe	90
PID 1260 wrote to memory of 3444	1260	cmd.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\msimg32.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1468
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\msimg32.dll,#1
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - Blocklisted process makes network request
    PID:2176
- - 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
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1260
  - - 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
      4⤵
      Adds Run key to start application
      PID:3444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1492-7-0x0000000010000000-0x00000000102A1000-memory.dmp

Filesize
2.6MB

Download
memory/1492-1-0x0000000010010000-0x000000001002A000-memory.dmp

Filesize
104KB

Download
memory/1492-6-0x0000000010000000-0x00000000102A1000-memory.dmp

Filesize
2.6MB

Download
memory/1492-0-0x0000000010000000-0x00000000102A1000-memory.dmp

Filesize
2.6MB

Download
memory/1492-2-0x0000000010000000-0x00000000102A1000-memory.dmp

Filesize
2.6MB

Download
memory/2176-14-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-17-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-9-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-3-0x0000000000DA0000-0x0000000000DA1000-memory.dmp

Filesize
4KB

Download
memory/2176-11-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-12-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-13-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-8-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-15-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-10-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-18-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-19-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-20-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-21-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-23-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-24-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-25-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-27-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download
memory/2176-28-0x0000000000D10000-0x0000000000D92000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads