remcos | 9161ed38d16be56e3242e33c3ccccad63f206db7a44e172163916322de79bd65

Analysis

max time kernel
149s
max time network
119s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-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

Executes dropped EXE 2 IoCs

pid	Process
2468	osgexnsck.pif
2972	RegSvcs.exe

Loads dropped DLL 5 IoCs

pid	Process
2520	New Order List & Specification.scr
2520	New Order List & Specification.scr
2520	New Order List & Specification.scr
2520	New Order List & Specification.scr
2468	osgexnsck.pif

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 2468 set thread context of 2972	2468	osgexnsck.pif	39

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 9 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	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	mshta.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2468	osgexnsck.pif

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2972	RegSvcs.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2468	2520	New Order List & Specification.scr	30
PID 2520 wrote to memory of 2468	2520	New Order List & Specification.scr	30
PID 2520 wrote to memory of 2468	2520	New Order List & Specification.scr	30
PID 2520 wrote to memory of 2468	2520	New Order List & Specification.scr	30
PID 2468 wrote to memory of 2476	2468	osgexnsck.pif	31
PID 2468 wrote to memory of 2476	2468	osgexnsck.pif	31
PID 2468 wrote to memory of 2476	2468	osgexnsck.pif	31
PID 2468 wrote to memory of 2476	2468	osgexnsck.pif	31
PID 2468 wrote to memory of 572	2468	osgexnsck.pif	32
PID 2468 wrote to memory of 572	2468	osgexnsck.pif	32
PID 2468 wrote to memory of 572	2468	osgexnsck.pif	32
PID 2468 wrote to memory of 572	2468	osgexnsck.pif	32
PID 2468 wrote to memory of 1996	2468	osgexnsck.pif	33
PID 2468 wrote to memory of 1996	2468	osgexnsck.pif	33
PID 2468 wrote to memory of 1996	2468	osgexnsck.pif	33
PID 2468 wrote to memory of 1996	2468	osgexnsck.pif	33
PID 2468 wrote to memory of 2000	2468	osgexnsck.pif	35
PID 2468 wrote to memory of 2000	2468	osgexnsck.pif	35
PID 2468 wrote to memory of 2000	2468	osgexnsck.pif	35
PID 2468 wrote to memory of 2000	2468	osgexnsck.pif	35
PID 2468 wrote to memory of 1492	2468	osgexnsck.pif	36
PID 2468 wrote to memory of 1492	2468	osgexnsck.pif	36
PID 2468 wrote to memory of 1492	2468	osgexnsck.pif	36
PID 2468 wrote to memory of 1492	2468	osgexnsck.pif	36
PID 2468 wrote to memory of 2368	2468	osgexnsck.pif	37
PID 2468 wrote to memory of 2368	2468	osgexnsck.pif	37
PID 2468 wrote to memory of 2368	2468	osgexnsck.pif	37
PID 2468 wrote to memory of 2368	2468	osgexnsck.pif	37
PID 2468 wrote to memory of 2624	2468	osgexnsck.pif	38
PID 2468 wrote to memory of 2624	2468	osgexnsck.pif	38
PID 2468 wrote to memory of 2624	2468	osgexnsck.pif	38
PID 2468 wrote to memory of 2624	2468	osgexnsck.pif	38
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39
PID 2468 wrote to memory of 2972	2468	osgexnsck.pif	39

C:\Users\Admin\AppData\Local\Temp\New Order List & Specification.scr
"C:\Users\Admin\AppData\Local\Temp\New Order List & Specification.scr" /S
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Users\Admin\AppData\Roaming\43719123\osgexnsck.pif
  "C:\Users\Admin\AppData\Roaming\43719123\osgexnsck.pif" tqsxtg.ekv
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2468
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2476
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:572
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1996
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2000
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1492
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2368
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2624
- - C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
    "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    PID:2972

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

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\Roaming\43719123\fcdi.mp3

Filesize
57KB

MD5
d40d39871eb1e08fb898f0f58dd9c138

SHA1
c3e45c711297c286f8cf2e8ba1b35c7d545f1771

SHA256
a1ec2daca2043eb4681d6b73b1e30ef93ad39ff794a1728d8d30a9cb2092c708

SHA512
6a57255ff93d41d3e70b6e8a290aaf43f49d94f0f08dbe61bdd3f0f9cb5da0632acbb4b19d71cfc3a6b919cbca7c6e3952a347730238f598e75d886c405175ae

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
ab8b5ca3b1184654098d4ed8bf32748d

SHA1
83eecb18b962f39d0dad949d5893d1309348c309

SHA256
d843b50f64819eb1ea32059d0c36150df25d37ea628093b5cced24ad30227829

SHA512
197b7590e421d6dbbc3b65fda27d42c771545e0e4c4b8ef37f3da9f0f43a0247ac48765cc8f717046e6fed64ac71f1deaef660ba02e7a770514452931557acc4

Download Submit
\Users\Admin\AppData\Local\Temp\RegSvcs.exe

Filesize
44KB

MD5
0e06054beb13192588e745ee63a84173

SHA1
30b7d4d1277bafd04a83779fd566a1f834a8d113

SHA256
c5d6d56ded55fbd6c150ee3a0eb2e5671cae83106be2be4d70ce50aa50bab768

SHA512
251a112f3f037e62ff67a467389e47a56afb344bc942b17efa9bd2970494718b26bbee9adc3ac35f93ee4d2114aa426b6d0ea4bafad294b6c118a15f1977c215

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

Filesize
758KB

MD5
279dae7236f5f2488a4bacde6027f730

SHA1
29a012e5259739f24480cedfd6d5f2d860cfcdb3

SHA256
415850f2706681a6d80708fca8ac18dcf97e58b8f3fdc7bc4b558ab15fc0a03f

SHA512
b81276fc4d915a9721dae15aa064781a1dba665ff4864ccbdf624e8049c1b3c12a2b374f11cffcf6e4a5217766836edbc5f2376ffa8765f9070cbd87d7ae2fe8

Download Submit
memory/2972-73-0x0000000000390000-0x0000000000A31000-memory.dmp

Filesize
6.6MB

Download
memory/2972-72-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2972-70-0x0000000000390000-0x0000000000A31000-memory.dmp

Filesize
6.6MB

Download
memory/2972-75-0x0000000000390000-0x0000000000A31000-memory.dmp

Filesize
6.6MB

Download
memory/2972-79-0x0000000000390000-0x0000000000A31000-memory.dmp

Filesize
6.6MB

Download
memory/2972-76-0x0000000000390000-0x0000000000A31000-memory.dmp

Filesize
6.6MB

Download