remcos | b571adb0b22f7874af6676b62d578b0161f714f1ee65d992272463f82847dba3

Analysis

max time kernel
148s
max time network
152s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
30/05/2024, 01:29

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General

Target

Mtn03 Credit Receipt Jpg.exe
Size

519KB
MD5

c39c874e0184d91e2a9ca393c919bac3
SHA1

2ce663a89bf9b7f2dbb8f847585bebd60cee52c7
SHA256

86b29c8b17f5e01fe26349520452e9cf853cfb816ef46f37b071f02b7d96d603
SHA512

8ce86457420fef18bb56c86c8af629752ab652ff45332799e8c4b39e856b209a64f9d9024be21da86f1288767e5dcf4ab41ca8cfc6f6f12f20d2419a92c5a91e
SSDEEP

12288:ivNVAT3iHR0R3ZvDSQJZTebqRkTsekknxN:AVgyHR0TvOQJkma/N

Score

10^/10

remcos host persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

william2243.duckdns.org:1598

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
remcos_pdaejuprezbgooi
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

detects Windows exceutables potentially bypassing UAC using eventvwr.exe 9 IoCs

resource	yara_rule
behavioral1/memory/2076-15-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2076-12-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2076-11-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2076-17-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2076-19-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2076-29-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2888-49-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2888-50-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer
behavioral1/memory/2888-51-0x0000000000400000-0x0000000000417000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer

Executes dropped EXE 2 IoCs

pid	Process
2412	remcos.exe
2888	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
2752	cmd.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-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	Mtn03 Credit Receipt Jpg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1936 set thread context of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 2412 set thread context of 2888	2412	remcos.exe	33

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2652	PING.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2888	remcos.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2888	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2888	remcos.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 1936 wrote to memory of 2076	1936	Mtn03 Credit Receipt Jpg.exe	28
PID 2076 wrote to memory of 2752	2076	Mtn03 Credit Receipt Jpg.exe	29
PID 2076 wrote to memory of 2752	2076	Mtn03 Credit Receipt Jpg.exe	29
PID 2076 wrote to memory of 2752	2076	Mtn03 Credit Receipt Jpg.exe	29
PID 2076 wrote to memory of 2752	2076	Mtn03 Credit Receipt Jpg.exe	29
PID 2076 wrote to memory of 2752	2076	Mtn03 Credit Receipt Jpg.exe	29
PID 2076 wrote to memory of 2752	2076	Mtn03 Credit Receipt Jpg.exe	29
PID 2076 wrote to memory of 2752	2076	Mtn03 Credit Receipt Jpg.exe	29
PID 2752 wrote to memory of 2652	2752	cmd.exe	31
PID 2752 wrote to memory of 2652	2752	cmd.exe	31
PID 2752 wrote to memory of 2652	2752	cmd.exe	31
PID 2752 wrote to memory of 2652	2752	cmd.exe	31
PID 2752 wrote to memory of 2412	2752	cmd.exe	32
PID 2752 wrote to memory of 2412	2752	cmd.exe	32
PID 2752 wrote to memory of 2412	2752	cmd.exe	32
PID 2752 wrote to memory of 2412	2752	cmd.exe	32
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33
PID 2412 wrote to memory of 2888	2412	remcos.exe	33

C:\Users\Admin\AppData\Local\Temp\Mtn03 Credit Receipt Jpg.exe
"C:\Users\Admin\AppData\Local\Temp\Mtn03 Credit Receipt Jpg.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Users\Admin\AppData\Local\Temp\Mtn03 Credit Receipt Jpg.exe
  "C:\Users\Admin\AppData\Local\Temp\Mtn03 Credit Receipt Jpg.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2076
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2752
  - - C:\Windows\SysWOW64\PING.EXE
      PING 127.0.0.1 -n 2
      4⤵
      Runs ping.exe
      PID:2652
  - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
      "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:2412
    - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        
        "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of FindShellTrayWindow
        Suspicious use of SendNotifyMessage
        Suspicious use of SetWindowsHookEx
        
        PID:2888

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

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.bat

Filesize
99B

MD5
76c1687d97dfdbcea62ef1490bec5001

SHA1
5f4d1aeafa7d840cde67b76f97416dd68efd1bed

SHA256
79f04ea049979ffd2232c459fdd57fae97a5255aea9b4a2c7dce7ead856f37a4

SHA512
da250f0628632a644f159d818a82a8b9cca8224e46843bddbe0f6f9c32a2d04f7736a620af49ab6d77616317ca7d68285e60043965fe86c03d940835bd30a925

Download Submit
\Users\Admin\AppData\Roaming\remcos\remcos.exe

Filesize
519KB

MD5
c39c874e0184d91e2a9ca393c919bac3

SHA1
2ce663a89bf9b7f2dbb8f847585bebd60cee52c7

SHA256
86b29c8b17f5e01fe26349520452e9cf853cfb816ef46f37b071f02b7d96d603

SHA512
8ce86457420fef18bb56c86c8af629752ab652ff45332799e8c4b39e856b209a64f9d9024be21da86f1288767e5dcf4ab41ca8cfc6f6f12f20d2419a92c5a91e

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memory/1936-6-0x00000000009C0000-0x00000000009D0000-memory.dmp

Filesize
64KB

Download
memory/1936-3-0x0000000004DE0000-0x0000000004E5C000-memory.dmp

Filesize
496KB

Download
memory/1936-4-0x00000000008E0000-0x00000000008F6000-memory.dmp

Filesize
88KB

Download
memory/1936-5-0x00000000009B0000-0x00000000009BC000-memory.dmp

Filesize
48KB

Download
memory/1936-0-0x00000000743BE000-0x00000000743BF000-memory.dmp

Filesize
4KB

Download
memory/1936-7-0x00000000051B0000-0x0000000005210000-memory.dmp

Filesize
384KB

Download
memory/1936-1-0x0000000000D50000-0x0000000000DD8000-memory.dmp

Filesize
544KB

Download
memory/1936-2-0x00000000743B0000-0x0000000074A9E000-memory.dmp

Filesize
6.9MB

Download
memory/1936-21-0x00000000743B0000-0x0000000074A9E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-12-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2076-11-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2076-10-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2076-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2076-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2076-9-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2076-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2076-15-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2076-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2076-8-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2412-34-0x0000000000B60000-0x0000000000BE8000-memory.dmp

Filesize
544KB

Download
memory/2412-35-0x0000000000310000-0x0000000000326000-memory.dmp

Filesize
88KB

Download
memory/2888-46-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2888-49-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2888-50-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2888-51-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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