remcos | 61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-12-2024 14:48

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General

Target

b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
Size

540KB
MD5

b8bc7a97eaa75f13cdfb5406d0e6e004
SHA1

aee977957dba42efb4808719ab3001101d95b1fb
SHA256

61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4
SHA512

a180f027e77d0967db2176992d892acd10a6810dcb962e0f601ea7abf4012e300678ab86dae53cc1e43535a0d99760b32eb79b08b757693489163d918ea22607
SSDEEP

12288:1EMn/s4p3C1fC6w8fBxtNUcp4sKqSj1iccor5S0/USkIV+a:1z/sW3C1fCD4DfUF

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

194.5.98.81:7123

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
mstsc.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_lfqwkauxufogluh
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
Remcos family
remcos

Checks computer location settings 2 TTPs 3 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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	mstsc.exe

Executes dropped EXE 2 IoCs

pid	Process
1876	mstsc.exe
1708	mstsc.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\mstsc.exe\""	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\mstsc.exe\""	mstsc.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1560 set thread context of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1876 set thread context of 1708	1876	mstsc.exe	110

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 8 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	mstsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mstsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
1008	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1008	PING.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1320	schtasks.exe
1360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
1876	mstsc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
Token: SeDebugPrivilege	1876	mstsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1708	mstsc.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1560 wrote to memory of 1320	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	100
PID 1560 wrote to memory of 1320	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	100
PID 1560 wrote to memory of 1320	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	100
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 1560 wrote to memory of 4260	1560	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	102
PID 4260 wrote to memory of 824	4260	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	103
PID 4260 wrote to memory of 824	4260	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	103
PID 4260 wrote to memory of 824	4260	b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe	103
PID 824 wrote to memory of 1008	824	cmd.exe	105
PID 824 wrote to memory of 1008	824	cmd.exe	105
PID 824 wrote to memory of 1008	824	cmd.exe	105
PID 824 wrote to memory of 1876	824	cmd.exe	107
PID 824 wrote to memory of 1876	824	cmd.exe	107
PID 824 wrote to memory of 1876	824	cmd.exe	107
PID 1876 wrote to memory of 1360	1876	mstsc.exe	108
PID 1876 wrote to memory of 1360	1876	mstsc.exe	108
PID 1876 wrote to memory of 1360	1876	mstsc.exe	108
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110
PID 1876 wrote to memory of 1708	1876	mstsc.exe	110

C:\Users\Admin\AppData\Local\Temp\b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1560
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AVehowTuz" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA88F.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1320
- C:\Users\Admin\AppData\Local\Temp\b8bc7a97eaa75f13cdfb5406d0e6e004_JaffaCakes118.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4260
- - 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:824
  - - 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:1008
  - - C:\Users\Admin\AppData\Roaming\remcos\mstsc.exe
      "C:\Users\Admin\AppData\Roaming\remcos\mstsc.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1876
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AVehowTuz" /XML "C:\Users\Admin\AppData\Local\Temp\tmp937C.tmp"
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:1360
    - - C:\Users\Admin\AppData\Roaming\remcos\mstsc.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:1708

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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

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Downloads

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

Filesize
98B

MD5
21bed91c3634ab147523bae86d71dc53

SHA1
0f81c75e634f83e300d33949bf48fb7e010d5480

SHA256
546eb97ad40e82000816ea08efeb65db8d17ab61e95bfb4b1df2bd8c33392968

SHA512
f4cd493bc9cba90d62efe5cf487c11679e05791797ff730a3cb168fe8a5a947c9965c2b71f378a70b805d1ef3e60834773eabba4fc82fe75d4c0a526ea04a38a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA88F.tmp

Filesize
1KB

MD5
9da98daae9b38dfffa9ac2bd5ca0d917

SHA1
f334958016efa91b79a06f128c25c99680eb102b

SHA256
f38dc4b595c97b9f4b1590b509aa77c837539258ca40fe26c94c8a6ab7866717

SHA512
3cf648c2f8b6082fa60a899ab3eecd0373137cffe010edcfe6768585818eeefa7bee7089f71bdf9989ebedf5d4e356f9980be9cae17f50cc52c9fa305086df1d

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

Filesize
540KB

MD5
b8bc7a97eaa75f13cdfb5406d0e6e004

SHA1
aee977957dba42efb4808719ab3001101d95b1fb

SHA256
61f086d38f23fedd3ed01281c6dc43901d0dda54c38e2160aec66840993e12c4

SHA512
a180f027e77d0967db2176992d892acd10a6810dcb962e0f601ea7abf4012e300678ab86dae53cc1e43535a0d99760b32eb79b08b757693489163d918ea22607

Download Submit
memory/1560-10-0x00000000051A0000-0x0000000005212000-memory.dmp

Filesize
456KB

Download
memory/1560-3-0x00000000070F0000-0x0000000007182000-memory.dmp

Filesize
584KB

Download
memory/1560-5-0x0000000002520000-0x000000000252A000-memory.dmp

Filesize
40KB

Download
memory/1560-6-0x0000000004CD0000-0x0000000004CD8000-memory.dmp

Filesize
32KB

Download
memory/1560-7-0x0000000004D80000-0x0000000004E1C000-memory.dmp

Filesize
624KB

Download
memory/1560-8-0x00000000749CE000-0x00000000749CF000-memory.dmp

Filesize
4KB

Download
memory/1560-9-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/1560-0-0x00000000749CE000-0x00000000749CF000-memory.dmp

Filesize
4KB

Download
memory/1560-11-0x0000000004D50000-0x0000000004D78000-memory.dmp

Filesize
160KB

Download
memory/1560-4-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/1560-1-0x0000000000330000-0x00000000003BC000-memory.dmp

Filesize
560KB

Download
memory/1560-2-0x0000000007600000-0x0000000007BA4000-memory.dmp

Filesize
5.6MB

Download
memory/1560-23-0x00000000749C0000-0x0000000075170000-memory.dmp

Filesize
7.7MB

Download
memory/1708-37-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4260-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4260-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4260-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4260-15-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download