remcos | 2d5b39db4ba22d4d70666fc5f83c0ba3416aa8551f7d9000edccdd501248e452

General

Target

Bank Remittance_pdf.scr
Size

792KB
MD5

8405c0ac70f510541b2353303ff7f025
SHA1

56093491a2af6467c1d36799f82d15fb74ed31ac
SHA256

72edf084c9542b902e064b7a933bb7662aa98906b59e3c0d9a76a00da82f898c
SHA512

43db8849515ef91d844e3de71dd03e067b95639142b8d7d5947879c6fcf02a8b93776b3eb91f2f6ea84efcb8417f44152f033b85acbc502bddc657e7699be348
SSDEEP

24576:Pj+0hEcJihWe9Fo5+3JG1ETE8ucQPi/6i:L+0fD+25CJGf8ubi/X

Score

10^/10

remcos p2-01 discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

P2-01

C2

87.120.114.20:53279

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-HMKDWQ
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Loads dropped DLL 1 IoCs

pid	Process
1404	Bank Remittance_pdf.scr

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\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subfolder1\\Subheads.exe"	msiexec.exe

Blocklisted process makes network request 5 IoCs

flow	pid	Process
29	2056	msiexec.exe
31	2056	msiexec.exe
36	2056	msiexec.exe
42	2056	msiexec.exe
44	2056	msiexec.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2056	msiexec.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1404	Bank Remittance_pdf.scr
2056	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1404 set thread context of 2056	1404	Bank Remittance_pdf.scr	96

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Unfurnish208.est	Bank Remittance_pdf.scr

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\randbetingelsens\filbetegnelse.evn	Bank Remittance_pdf.scr

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 2 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	Bank Remittance_pdf.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1404	Bank Remittance_pdf.scr

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 2056	1404	Bank Remittance_pdf.scr	96
PID 1404 wrote to memory of 2056	1404	Bank Remittance_pdf.scr	96
PID 1404 wrote to memory of 2056	1404	Bank Remittance_pdf.scr	96
PID 1404 wrote to memory of 2056	1404	Bank Remittance_pdf.scr	96
PID 1404 wrote to memory of 2056	1404	Bank Remittance_pdf.scr	96

C:\Users\Admin\AppData\Local\Temp\Bank Remittance_pdf.scr
"C:\Users\Admin\AppData\Local\Temp\Bank Remittance_pdf.scr" /S
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Users\Admin\AppData\Local\Temp\Bank Remittance_pdf.scr" /S
  2⤵
  - Adds Run key to start application
  - Blocklisted process makes network request
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
51d565f45f89d074275f38fbd585255f

SHA1
8ad702c1143beba1ed045cdc2db3a327e57aaac4

SHA256
a96b2c00d8452ba2f53715477e1f1cb67fbcfb2aa3fe0c0cdd6423d8741fabc2

SHA512
672a9f9a8108bff7e57a03e733d864425d20907d013fce737c4765514691bb8fd4972c9df75953f49be850fb560c274cb7c6b7ee48938c6eb371ea23eb6f143f

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsr981B.tmp\System.dll

Filesize
11KB

MD5
375e8a08471dc6f85f3828488b1147b3

SHA1
1941484ac710fc301a7d31d6f1345e32a21546af

SHA256
4c86b238e64ecfaabe322a70fd78db229a663ccc209920f3385596a6e3205f78

SHA512
5ba29db13723ddf27b265a4548606274b850d076ae1f050c64044f8ccd020585ad766c85c3e20003a22f356875f76fb3679c89547b0962580d8e5a42b082b9a8

Download Submit
memory/1404-12-0x0000000077731000-0x0000000077851000-memory.dmp

Filesize
1.1MB

Download
memory/1404-13-0x0000000077731000-0x0000000077851000-memory.dmp

Filesize
1.1MB

Download
memory/1404-14-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2056-33-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-42-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-24-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-29-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-31-0x0000000077731000-0x0000000077851000-memory.dmp

Filesize
1.1MB

Download
memory/2056-16-0x0000000077731000-0x0000000077851000-memory.dmp

Filesize
1.1MB

Download
memory/2056-36-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-15-0x00000000777B8000-0x00000000777B9000-memory.dmp

Filesize
4KB

Download
memory/2056-39-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-28-0x0000000077731000-0x0000000077851000-memory.dmp

Filesize
1.1MB

Download
memory/2056-45-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-48-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-51-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-54-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-57-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-60-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download
memory/2056-63-0x0000000000C00000-0x0000000001E54000-memory.dmp

Filesize
18.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads