remcos | 9ade8e3be001803151f0013e9e36c53ce9b8f7aed9841a8950084e396979b164

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2024, 10:19

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General

Target

61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
Size

1.1MB
MD5

61b928e535a28ff972fd74486aca34ef
SHA1

0520ed8c02184baf4a6a642ccca707d0884e4640
SHA256

9ade8e3be001803151f0013e9e36c53ce9b8f7aed9841a8950084e396979b164
SHA512

96cc976a2c42aaa041fe41ead33f31c8f0457b35bece898c648adb072427a0157495d8ceb8df6d768e7f0230efd18328462520f61b3545fe92a124ff7d35fffe
SSDEEP

12288:1t0Q5JEq/y6INX6LRgU7e9pqmjtirGi4tn/vJgs0wv1+dHNm0+75U7+FmJ:H0kGq/wKgDkmj2GjtnZw5+8

Score

10^/10

remcos kash2 discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

3.1.4 Pro

Botnet

KASH2

kashbilly2.ddns.net:6060

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-TJR9T9
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\MAINPROC.exe,"	reg.exe

Remcos
Remcos is a closed-source remote control and surveillance software.
rat 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	smss.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	MAINPROC.exe

Executes dropped EXE 4 IoCs

pid	Process
3600	MAINPROC.exe
2288	AddInProcess32.exe
3564	smss.exe
5052	smss.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3600 set thread context of 2288	3600	MAINPROC.exe	98

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 6 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	smss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MAINPROC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smss.exe

Suspicious behavior: EnumeratesProcesses 37 IoCs

pid	Process
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
3600	MAINPROC.exe
3600	MAINPROC.exe
3600	MAINPROC.exe
3600	MAINPROC.exe
3564	smss.exe
5052	smss.exe
5052	smss.exe
5052	smss.exe
3600	MAINPROC.exe
3600	MAINPROC.exe
3600	MAINPROC.exe
3600	MAINPROC.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
Token: SeDebugPrivilege	3600	MAINPROC.exe
Token: SeDebugPrivilege	3564	smss.exe
Token: SeDebugPrivilege	5052	smss.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2288	AddInProcess32.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 384 wrote to memory of 5000	384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe	91
PID 384 wrote to memory of 5000	384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe	91
PID 384 wrote to memory of 5000	384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe	91
PID 5000 wrote to memory of 1072	5000	cmd.exe	93
PID 5000 wrote to memory of 1072	5000	cmd.exe	93
PID 5000 wrote to memory of 1072	5000	cmd.exe	93
PID 384 wrote to memory of 3600	384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe	97
PID 384 wrote to memory of 3600	384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe	97
PID 384 wrote to memory of 3600	384	61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe	97
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 2288	3600	MAINPROC.exe	98
PID 3600 wrote to memory of 3564	3600	MAINPROC.exe	99
PID 3600 wrote to memory of 3564	3600	MAINPROC.exe	99
PID 3600 wrote to memory of 3564	3600	MAINPROC.exe	99
PID 3564 wrote to memory of 5052	3564	smss.exe	100
PID 3564 wrote to memory of 5052	3564	smss.exe	100
PID 3564 wrote to memory of 5052	3564	smss.exe	100

C:\Users\Admin\AppData\Local\Temp\61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\61b928e535a28ff972fd74486aca34ef_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:384
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\MAINPROC.exe,"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5000
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\AppData\Roaming\MAINPROC.exe,"
    3⤵
    - Modifies WinLogon for persistence
    - System Location Discovery: System Language Discovery
    PID:1072
- C:\Users\Admin\AppData\Roaming\MAINPROC.exe
  "C:\Users\Admin\AppData\Roaming\MAINPROC.exe"
  2⤵
  - 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:3600
- - C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
    "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    PID:2288
- - C:\Users\Admin\AppData\Local\Temp\smss.exe
    "C:\Users\Admin\AppData\Local\Temp\smss.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3564
  - - C:\Users\Admin\AppData\Local\Temp\smss.exe
      "C:\Users\Admin\AppData\Local\Temp\smss.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe

Filesize
42KB

MD5
9827ff3cdf4b83f9c86354606736ca9c

SHA1
e73d73f42bb2a310f03eb1bcbb22be2b8eb7c723

SHA256
c1cf3dc8fa1c7fc00f88e07ad539979b3706ca8d69223cffd1d58bc8f521f63a

SHA512
8261828d55f3b5134c0aeb98311c04e20c5395d4347251746f3be0fb854f36cc7e118713cd00c9867537e6e47d5e71f2b2384fc00c67f0ae1b285b8310321579

Download Submit
C:\Users\Admin\AppData\Local\Temp\smss.exe

Filesize
76KB

MD5
0e362e7005823d0bec3719b902ed6d62

SHA1
590d860b909804349e0cdc2f1662b37bd62f7463

SHA256
2d0dc6216f613ac7551a7e70a798c22aee8eb9819428b1357e2b8c73bef905ad

SHA512
518991b68496b3f8545e418cf9b345e0791e09cc20d177b8aa47e0aba447aa55383c64f5bdaca39f2b061a5d08c16f2ad484af8a9f238ca23ab081618fba3ad3

Download Submit
C:\Users\Admin\AppData\Local\Temp\smss.txt

Filesize
54B

MD5
d6d801c4a1cb4f884bca7450779fe89b

SHA1
edb993f2f0363acf3325b7d1c7bf3399e04292f5

SHA256
2b87a9f7f6bfaaaf59e201f5a25a603a1d8ce3b1abb89dddf3124f2e004e5561

SHA512
9cf360e2dd63509912463210288cd844f7bedb7741cbd15a648ba779db9535a31c81742ee473515d3f4729c573861ffac5b0395d2892f3adfbef298f729d15bf

Download Submit
C:\Users\Admin\AppData\Local\Temp\smss.txt

Filesize
57B

MD5
2db944b5ebb7a381ffb264fee36ce0b8

SHA1
b3521e6e6b15df1111c0e356fa7c47d3a4246aef

SHA256
61bc6e6984b8b8a2d9994952f1cc6041cb4cb7dd82da05fca36992fd3943622c

SHA512
ccb66564ab64affad0a954e4e73a54c0af81efcef66560299fcb71b23dbf23b2dea56dbdd03435345fa99ce1018c5618cbf0490775d561c4ee583422c996e628

Download Submit
C:\Users\Admin\AppData\Roaming\MAINPROC.exe

Filesize
1.1MB

MD5
61b928e535a28ff972fd74486aca34ef

SHA1
0520ed8c02184baf4a6a642ccca707d0884e4640

SHA256
9ade8e3be001803151f0013e9e36c53ce9b8f7aed9841a8950084e396979b164

SHA512
96cc976a2c42aaa041fe41ead33f31c8f0457b35bece898c648adb072427a0157495d8ceb8df6d768e7f0230efd18328462520f61b3545fe92a124ff7d35fffe

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
148B

MD5
2ba2f162221ce5730266ce40742ad94f

SHA1
8b012c9257796ddd87fa8c65f58800a60c4e6408

SHA256
a9b9378b303fde1fb559b10befe51b62e9f934600832e1ba74c572464baa340a

SHA512
e9e983a3d68c2b45518960c31f68ca8ba1d6da0fc183159d58f6bce0c4029e56c147cedb840c56f1fba2952bf9dac26403cf62157459c4d3dc5e3d54ad57948a

Download Submit
memory/384-9-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/384-7-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/384-6-0x0000000005D30000-0x0000000005D68000-memory.dmp

Filesize
224KB

Download
memory/384-11-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/384-12-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/384-5-0x0000000006090000-0x0000000006634000-memory.dmp

Filesize
5.6MB

Download
memory/384-24-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/384-4-0x0000000005A40000-0x0000000005AD2000-memory.dmp

Filesize
584KB

Download
memory/384-3-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/384-2-0x0000000004C10000-0x0000000004CAC000-memory.dmp

Filesize
624KB

Download
memory/384-1-0x00000000001A0000-0x00000000002C8000-memory.dmp

Filesize
1.2MB

Download
memory/384-0-0x000000007522E000-0x000000007522F000-memory.dmp

Filesize
4KB

Download
memory/2288-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2288-43-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2288-65-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2288-36-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2288-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2288-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2288-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3564-55-0x0000000000850000-0x000000000086A000-memory.dmp

Filesize
104KB

Download
memory/3600-42-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3600-44-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3600-28-0x0000000002F70000-0x0000000002F84000-memory.dmp

Filesize
80KB

Download
memory/3600-29-0x0000000006430000-0x0000000006436000-memory.dmp

Filesize
24KB

Download
memory/3600-27-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3600-26-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3600-31-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3600-25-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download