remcos | 031527224e74b82bf16e639c666134674ecc8a6e648fed2f68255617bd6a3b18

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-11-2024 20:43

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General

Target

632cfc71bd4734fdd98e48166a52fbc4a48d43640f3375fd882dd374479bffb1.doc
Size

9.3MB
MD5

aaa839e4993c07fdfba45afe8826d6bf
SHA1

3d00bce50c92b31c3d74d20c5451aedc6878a246
SHA256

632cfc71bd4734fdd98e48166a52fbc4a48d43640f3375fd882dd374479bffb1
SHA512

e3bca0a028a39e602b093069fb84a84ff13d7451ebaaf05dc127aa061ae7d096460133a3b8d726adedafd1dd08d09621197bf9e8747ac622bfedd909dec6f3cc
SSDEEP

98304:IydePKsBylarg6bY/J1ZKbTsBylarg6bY/J1ZKb2ayX0I6:IHisB2Eb01ZssB2Eb01Z820X

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Version

3.1.4 Pro

Botnet

RemoteHost

elninotronics.com:2404

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-E8E8J7
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
wikipedia;solitaire;

Signatures

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

Executes dropped EXE 1 IoCs

Processes:

openvpn-gui.exe

pid	Process
3004	openvpn-gui.exe

Loads dropped DLL 3 IoCs

Processes:

WINWORD.EXEopenvpn-gui.exe

pid	Process
3076	WINWORD.EXE
3004	openvpn-gui.exe
3004	openvpn-gui.exe

Drops file in Windows directory 1 IoCs

Processes:

cmd.exe

description	ioc	Process
File created	C:\Windows\Tasks\openvpn-gui.job	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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

Processes:

openvpn-gui.exenotepad.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	openvpn-gui.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid	Process
3076	WINWORD.EXE
3076	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

openvpn-gui.exenotepad.exe

pid	Process
3004	openvpn-gui.exe
4372	notepad.exe
4372	notepad.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

notepad.exe

pid	Process
4372	notepad.exe
4372	notepad.exe

Suspicious use of SetWindowsHookEx 10 IoCs

Processes:

WINWORD.EXEopenvpn-gui.exe

pid	Process
3076	WINWORD.EXE
3076	WINWORD.EXE
3076	WINWORD.EXE
3076	WINWORD.EXE
3076	WINWORD.EXE
3076	WINWORD.EXE
3076	WINWORD.EXE
3076	WINWORD.EXE
3076	WINWORD.EXE
3004	openvpn-gui.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

openvpn-gui.exe

description	pid	Process	procid_target
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101
PID 3004 wrote to memory of 4372	3004	openvpn-gui.exe	101

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\632cfc71bd4734fdd98e48166a52fbc4a48d43640f3375fd882dd374479bffb1.doc" /o ""
1⤵
- Loads dropped DLL
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:3076

C:\Users\Admin\AppData\Local\Adobe\Color\openvpn-gui.exe
"C:\Users\Admin\AppData\Local\Adobe\Color\openvpn-gui.exe"
1⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\SysWOW64\notepad.exe
  "C:\Windows\system32\notepad.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:4372
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe"
    3⤵
    PID:5024
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe"
    3⤵
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Adobe\Color\cmpbk32.dll

Filesize
3.9MB

MD5
67389b7169dbec76a9a11d8570896f4f

SHA1
b9083a4f76911d2ab03b1e3fa2eaa7518e2e8928

SHA256
d65ea87824e597d3025d6beb12cc3816a98fb34125628120abf7dc3fc73d0e39

SHA512
3a095f630d3c68e0af6ae0f4c469db33c90eb537edefd83f1b054241ed43ed2afe1a2c34a693cd81388f8edae693890f2bb6b9b81a1f9adca841eb05b8abb342

Download Submit
C:\Users\Admin\AppData\Local\Adobe\Color\openvpn-gui.exe

Filesize
45KB

MD5
87390e37e36622b054d4bdcbb7997b6c

SHA1
4d591f310318fd95a95109d7965a79729b65c69e

SHA256
5f067f86ad0f88a629263162810bf5052f5ebbd97d5d0de936311bb44c9f35e7

SHA512
285abb19138a5dd109dfc0e76f4a4f96b3731a84ca9229e6ef9315513b052fd7ad7b2e0392ac9becbf4caf2c9bbdbd87f5b66486fb2ae1385c1fbe6e1ed643dd

Download Submit
C:\Users\Admin\AppData\Local\Temp\TCD41C1.tmp\sist02.xsl

Filesize
245KB

MD5
f883b260a8d67082ea895c14bf56dd56

SHA1
7954565c1f243d46ad3b1e2f1baf3281451fc14b

SHA256
ef4835db41a485b56c2ef0ff7094bc2350460573a686182bc45fd6613480e353

SHA512
d95924a499f32d9b4d9a7d298502181f9e9048c21dbe0496fa3c3279b263d6f7d594b859111a99b1a53bd248ee69b867d7b1768c42e1e40934e0b990f0ce051e

Download Submit
C:\Users\Admin\AppData\Local\Temp\churner.dll

Filesize
29KB

MD5
f7092de5f32c0df837fa7f947a3424af

SHA1
acc8123288c20b1c4ae67ef4f2b4028d9153239c

SHA256
97adb1700858b74f456f5cf681b0421d0be50e3aed1adea3d1b9694295723700

SHA512
f10d5c86a85d3d8be56fb5066fddd0474c71a36f280f475f4e3d6cc939718647f493665c4c9ea00c3d60f22f172019e2082c7090b54f730d02701f1cb3d34164

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms

Filesize
2KB

MD5
ecc057ec79b066d9736d95015d7797dc

SHA1
926385ce88d23c5ac765035582388d0f575f1967

SHA256
2efed6e1976f9bd3da68b365733f6a9825c86027fe7294b04cda7fb3161eb231

SHA512
8eb5977d0b7a5e00549616d12e33851309ff353f837ff17c1cedbff17fb1fa8af18e9bab3a11fd14368263e3e392d126fa5c871b5d493cf8744ddedc2f57044c

Download Submit
memory/1564-226-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1564-221-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3004-218-0x00000000015D0000-0x00000000019D1000-memory.dmp

Filesize
4.0MB

Download
memory/3004-99-0x00000000015D0000-0x00000000019D1000-memory.dmp

Filesize
4.0MB

Download
memory/3076-17-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-75-0x0000014A476C0000-0x0000014A476C4000-memory.dmp

Filesize
16KB

Download
memory/3076-10-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-12-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-13-0x00007FFECA190000-0x00007FFECA1A0000-memory.dmp

Filesize
64KB

Download
memory/3076-14-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-16-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-21-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-23-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-22-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-20-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-19-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-18-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-1-0x00007FFF0C4CD000-0x00007FFF0C4CE000-memory.dmp

Filesize
4KB

Download
memory/3076-15-0x00007FFECA190000-0x00007FFECA1A0000-memory.dmp

Filesize
64KB

Download
memory/3076-57-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-61-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-51-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-6-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-11-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-76-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-77-0x00007FFF0C4CD000-0x00007FFF0C4CE000-memory.dmp

Filesize
4KB

Download
memory/3076-78-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-79-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-80-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-7-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-89-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-90-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-91-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-8-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-9-0x00007FFF0C430000-0x00007FFF0C625000-memory.dmp

Filesize
2.0MB

Download
memory/3076-4-0x00007FFECC4B0000-0x00007FFECC4C0000-memory.dmp

Filesize
64KB

Download
memory/3076-3-0x00007FFECC4B0000-0x00007FFECC4C0000-memory.dmp

Filesize
64KB

Download
memory/3076-5-0x00007FFECC4B0000-0x00007FFECC4C0000-memory.dmp

Filesize
64KB

Download
memory/3076-0-0x00007FFECC4B0000-0x00007FFECC4C0000-memory.dmp

Filesize
64KB

Download
memory/3076-2-0x00007FFECC4B0000-0x00007FFECC4C0000-memory.dmp

Filesize
64KB

Download
memory/4372-219-0x0000000004850000-0x00000000048DA000-memory.dmp

Filesize
552KB

Download