remcos | 9161ed38d16be56e3242e33c3ccccad63f206db7a44e172163916322de79bd65

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-12-2024 21:50

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General

Target

New Order List & Specification.scr
Size

1.3MB
MD5

39f59475d4b4672638a90ac2e475cd90
SHA1

0fdabe47559fab6484f383fab08a451be9879f65
SHA256

13a65e23f4c45234d2e73ce746b29a13b10df6f5a7508087029432aa62d458c5
SHA512

f26355f9da0afa11fcc8782bad79c293735ba7a099f54b9bd60195122f9e7687ac322f93eba5d0caa7c0f2d49e7a4ce4f464bbb6cf08efb71e0cc998511b8b9d
SSDEEP

24576:rAOcZEhWQ3b+q83UrJ8aOZTI28rX3XW7gUr7ohP5/RCaezriRdNdQWTq6ai0bagZ:tooJ83UreIN3soVNRNezMdbTq6d4a55e

Score

10^/10

remcos october-$$$$discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

3.3.0 Pro

Botnet

OCTOBER-$$$$

mgc0147.hopto.org:2930

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-3MPDYA
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

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

Checks computer location settings 2 TTPs 2 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	New Order List & Specification.scr
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	osgexnsck.pif

Executes dropped EXE 2 IoCs

pid	Process
3772	osgexnsck.pif
1488	RegSvcs.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\43719123\\OSGEXN~1.PIF C:\\Users\\Admin\\AppData\\Roaming\\43719123\\tqsxtg.ekv"	osgexnsck.pif

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3772 set thread context of 1488	3772	osgexnsck.pif	100

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 10 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	mshta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	New Order List & Specification.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	osgexnsck.pif
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3772	osgexnsck.pif
3772	osgexnsck.pif

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
3772	osgexnsck.pif
1488	RegSvcs.exe
1488	RegSvcs.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 3772	4952	New Order List & Specification.scr	82
PID 4952 wrote to memory of 3772	4952	New Order List & Specification.scr	82
PID 4952 wrote to memory of 3772	4952	New Order List & Specification.scr	82
PID 3772 wrote to memory of 4468	3772	osgexnsck.pif	84
PID 3772 wrote to memory of 4468	3772	osgexnsck.pif	84
PID 3772 wrote to memory of 4468	3772	osgexnsck.pif	84
PID 3772 wrote to memory of 2360	3772	osgexnsck.pif	85
PID 3772 wrote to memory of 2360	3772	osgexnsck.pif	85
PID 3772 wrote to memory of 2360	3772	osgexnsck.pif	85
PID 3772 wrote to memory of 3244	3772	osgexnsck.pif	91
PID 3772 wrote to memory of 3244	3772	osgexnsck.pif	91
PID 3772 wrote to memory of 3244	3772	osgexnsck.pif	91
PID 3772 wrote to memory of 1548	3772	osgexnsck.pif	94
PID 3772 wrote to memory of 1548	3772	osgexnsck.pif	94
PID 3772 wrote to memory of 1548	3772	osgexnsck.pif	94
PID 3772 wrote to memory of 4608	3772	osgexnsck.pif	95
PID 3772 wrote to memory of 4608	3772	osgexnsck.pif	95
PID 3772 wrote to memory of 4608	3772	osgexnsck.pif	95
PID 3772 wrote to memory of 3452	3772	osgexnsck.pif	97
PID 3772 wrote to memory of 3452	3772	osgexnsck.pif	97
PID 3772 wrote to memory of 3452	3772	osgexnsck.pif	97
PID 3772 wrote to memory of 1304	3772	osgexnsck.pif	99
PID 3772 wrote to memory of 1304	3772	osgexnsck.pif	99
PID 3772 wrote to memory of 1304	3772	osgexnsck.pif	99
PID 3772 wrote to memory of 1488	3772	osgexnsck.pif	100
PID 3772 wrote to memory of 1488	3772	osgexnsck.pif	100
PID 3772 wrote to memory of 1488	3772	osgexnsck.pif	100
PID 3772 wrote to memory of 1488	3772	osgexnsck.pif	100
PID 3772 wrote to memory of 1488	3772	osgexnsck.pif	100

C:\Users\Admin\AppData\Local\Temp\New Order List & Specification.scr
"C:\Users\Admin\AppData\Local\Temp\New Order List & Specification.scr" /S
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Users\Admin\AppData\Roaming\43719123\osgexnsck.pif
  "C:\Users\Admin\AppData\Roaming\43719123\osgexnsck.pif" tqsxtg.ekv
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3772
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4468
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2360
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3244
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1548
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4608
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3452
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1304
- - C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
    "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:1488

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

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\RegSvcs.exe

Filesize
44KB

MD5
9d352bc46709f0cb5ec974633a0c3c94

SHA1
1969771b2f022f9a86d77ac4d4d239becdf08d07

SHA256
2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390

SHA512
13c714244ec56beeb202279e4109d59c2a43c3cf29f90a374a751c04fd472b45228ca5a0178f41109ed863dbd34e0879e4a21f5e38ae3d89559c57e6be990a9b

Download Submit
C:\Users\Admin\AppData\Roaming\43719123\fcdi.mp3

Filesize
57KB

MD5
d40d39871eb1e08fb898f0f58dd9c138

SHA1
c3e45c711297c286f8cf2e8ba1b35c7d545f1771

SHA256
a1ec2daca2043eb4681d6b73b1e30ef93ad39ff794a1728d8d30a9cb2092c708

SHA512
6a57255ff93d41d3e70b6e8a290aaf43f49d94f0f08dbe61bdd3f0f9cb5da0632acbb4b19d71cfc3a6b919cbca7c6e3952a347730238f598e75d886c405175ae

Download Submit
C:\Users\Admin\AppData\Roaming\43719123\osgexnsck.pif

Filesize
758KB

MD5
279dae7236f5f2488a4bacde6027f730

SHA1
29a012e5259739f24480cedfd6d5f2d860cfcdb3

SHA256
415850f2706681a6d80708fca8ac18dcf97e58b8f3fdc7bc4b558ab15fc0a03f

SHA512
b81276fc4d915a9721dae15aa064781a1dba665ff4864ccbdf624e8049c1b3c12a2b374f11cffcf6e4a5217766836edbc5f2376ffa8765f9070cbd87d7ae2fe8

Download Submit
C:\Users\Admin\AppData\Roaming\43719123\smqewogxj.iow

Filesize
919KB

MD5
897d811670ccf4422316b304b8c09ec9

SHA1
5cb58926daa398a79c8d7299feac61492c07e4f0

SHA256
b39a4320e002d1a7857ead4c2e5bb84f89a6e1377bfcf39e439d9a2ef89766da

SHA512
bcb9be58d1f1b75d25dc08d1e0d6c1c2e039798dbdc9f6036c6e017eece57c5f370522f05b3ad5aa981855853fe5422b58b04127116492e9f24cfd23af4d0a56

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

Filesize
148B

MD5
1b8e6c166790c0b4c92a52f022020f76

SHA1
37bb22b035eec1898c70caebcc142fca06b2af5a

SHA256
87ae526015dc2531ad9a3016779873a6f9e32381b36eb3dc7d32855af9e7a95e

SHA512
78b7e4b9fbcbaea8e245639b03deb1cdd7112db514c12a809d253c49181db9cdfdee4e823963f3b8422ca8b35b96719bc09ba37319f51e4e3c1637a0d4110479

Download Submit
memory/1488-64-0x0000000000D00000-0x0000000001354000-memory.dmp

Filesize
6.3MB

Download
memory/1488-65-0x0000000000D00000-0x0000000001354000-memory.dmp

Filesize
6.3MB

Download
memory/1488-62-0x0000000000D00000-0x0000000001354000-memory.dmp

Filesize
6.3MB

Download
memory/1488-59-0x0000000000D00000-0x0000000001354000-memory.dmp

Filesize
6.3MB

Download
memory/1488-68-0x0000000000D00000-0x0000000001354000-memory.dmp

Filesize
6.3MB

Download