remcos | a2611ddad5f039debf43eedc90fa623f0cddcc15cf7ccac5077ebcfcfaa1ff93

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11-12-2024 22:15

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

1b765163140ac7c6f63debf72c48c905.exe
Size

830KB
MD5

a5221d350b704c5d745bac1049068522
SHA1

15302d6bf3d1f553dce9439a90b99c4933ec37f5
SHA256

edd9b55e1741859c761985af9a3e1be9535d5d57723d9938fdef08717978c934
SHA512

1a9739e738448ac1ca1fc2b530084b5b4b2344e8ac485c08de521dc33f6ebc740b2adaef86732ea3c2976dc8288167ebb014bd93b49fc358feb7798deb5f922a
SSDEEP

12288:rAOX8QIYDYK/XgjZwhqCnRKULb5Mhws1dqHK7zbzKboFr7F:kOQYDY9PQh5ls1dZLKboH

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

zxyqx.ydns.eu:4142

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
iservice.exe
copy_folder
remcos
delete_file
false
hide_file
true
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_vyycvmsmjn
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
windows
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

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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	1b765163140ac7c6f63debf72c48c905.exe

Executes dropped EXE 2 IoCs

pid	Process
2336	iservice.exe
736	iservice.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-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\windows = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\iservice.exe\""	1b765163140ac7c6f63debf72c48c905.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\windows = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\iservice.exe\""	iservice.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3832 set thread context of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 2336 set thread context of 736	2336	iservice.exe	96

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 5 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	1b765163140ac7c6f63debf72c48c905.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1b765163140ac7c6f63debf72c48c905.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iservice.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
924	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
924	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
736	iservice.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 3832 wrote to memory of 4968	3832	1b765163140ac7c6f63debf72c48c905.exe	91
PID 4968 wrote to memory of 4752	4968	1b765163140ac7c6f63debf72c48c905.exe	92
PID 4968 wrote to memory of 4752	4968	1b765163140ac7c6f63debf72c48c905.exe	92
PID 4968 wrote to memory of 4752	4968	1b765163140ac7c6f63debf72c48c905.exe	92
PID 4752 wrote to memory of 924	4752	cmd.exe	94
PID 4752 wrote to memory of 924	4752	cmd.exe	94
PID 4752 wrote to memory of 924	4752	cmd.exe	94
PID 4752 wrote to memory of 2336	4752	cmd.exe	95
PID 4752 wrote to memory of 2336	4752	cmd.exe	95
PID 4752 wrote to memory of 2336	4752	cmd.exe	95
PID 2336 wrote to memory of 736	2336	iservice.exe	96
PID 2336 wrote to memory of 736	2336	iservice.exe	96
PID 2336 wrote to memory of 736	2336	iservice.exe	96
PID 2336 wrote to memory of 736	2336	iservice.exe	96
PID 2336 wrote to memory of 736	2336	iservice.exe	96
PID 2336 wrote to memory of 736	2336	iservice.exe	96
PID 2336 wrote to memory of 736	2336	iservice.exe	96
PID 2336 wrote to memory of 736	2336	iservice.exe	96
PID 2336 wrote to memory of 736	2336	iservice.exe	96

C:\Users\Admin\AppData\Local\Temp\1b765163140ac7c6f63debf72c48c905.exe
"C:\Users\Admin\AppData\Local\Temp\1b765163140ac7c6f63debf72c48c905.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3832
- C:\Users\Admin\AppData\Local\Temp\1b765163140ac7c6f63debf72c48c905.exe
  "C:\Users\Admin\AppData\Local\Temp\1b765163140ac7c6f63debf72c48c905.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4968
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4752
  - - C:\Windows\SysWOW64\PING.EXE
      PING 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:924
  - - C:\Users\Admin\AppData\Roaming\remcos\iservice.exe
      "C:\Users\Admin\AppData\Roaming\remcos\iservice.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2336
    - - C:\Users\Admin\AppData\Roaming\remcos\iservice.exe
        
        "C:\Users\Admin\AppData\Roaming\remcos\iservice.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:736

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

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
101B

MD5
c27fd83af46c16a17eee14dc99bb60cd

SHA1
b048e2355e798eef49c0ddc6f5d2752505648d52

SHA256
5b19982bf50ac001aba35c5f23a9e4a990fc4f0034adaa992b913970bc55f2f4

SHA512
a167965afd5f7d664e969de7778b56368224eb579b547be2ef0adf0fd7890297cc24390e628ecf842df58ad48ee69870e5112a5bdc6439ace8b4155ccb85622d

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\iservice.exe

Filesize
830KB

MD5
a5221d350b704c5d745bac1049068522

SHA1
15302d6bf3d1f553dce9439a90b99c4933ec37f5

SHA256
edd9b55e1741859c761985af9a3e1be9535d5d57723d9938fdef08717978c934

SHA512
1a9739e738448ac1ca1fc2b530084b5b4b2344e8ac485c08de521dc33f6ebc740b2adaef86732ea3c2976dc8288167ebb014bd93b49fc358feb7798deb5f922a

Download Submit
memory/736-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2336-30-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/2336-29-0x000000007463E000-0x000000007463F000-memory.dmp

Filesize
4KB

Download
memory/3832-10-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/3832-5-0x0000000005610000-0x000000000561A000-memory.dmp

Filesize
40KB

Download
memory/3832-7-0x00000000058B0000-0x0000000005906000-memory.dmp

Filesize
344KB

Download
memory/3832-8-0x0000000005960000-0x0000000005976000-memory.dmp

Filesize
88KB

Download
memory/3832-9-0x000000007464E000-0x000000007464F000-memory.dmp

Filesize
4KB

Download
memory/3832-0-0x000000007464E000-0x000000007464F000-memory.dmp

Filesize
4KB

Download
memory/3832-11-0x0000000007100000-0x000000000718C000-memory.dmp

Filesize
560KB

Download
memory/3832-12-0x0000000009760000-0x000000000977E000-memory.dmp

Filesize
120KB

Download
memory/3832-1-0x0000000000AB0000-0x0000000000B84000-memory.dmp

Filesize
848KB

Download
memory/3832-2-0x0000000005560000-0x00000000055FC000-memory.dmp

Filesize
624KB

Download
memory/3832-3-0x0000000005C00000-0x00000000061A4000-memory.dmp

Filesize
5.6MB

Download
memory/3832-21-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/3832-4-0x00000000056F0000-0x0000000005782000-memory.dmp

Filesize
584KB

Download
memory/3832-6-0x0000000074640000-0x0000000074DF0000-memory.dmp

Filesize
7.7MB

Download
memory/4968-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4968-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4968-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4968-13-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads