remcos | a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76

Analysis

max time kernel
149s
max time network
125s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
29-11-2024 03:49

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General

Target

a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Size

1.1MB
MD5

0f7e8e737582613d9ec805ea627bd1ff
SHA1

0a3aa2d8c65e2e03c900b8a148c1ad53f65289fd
SHA256

a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76
SHA512

b384c1a5eab522bd4058602a1f61411729baef765bf459b5937722e2e974712942111da764bb26a5747b5406453c531c079de3437c2420b5cd5fc8fd802cb8cd
SSDEEP

24576:XCPQ3X6wOmeEXfz0ty9qXo93AkC4rhp3pZ:XC4azmeEvz14Xo95zZ

Score

10^/10

remcos document discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Document

45.138.48.25:3333

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
WinUpdate.exe
copy_folder
WinUpdate
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%Temp%
keylog_crypt
false
keylog_file
WinUpdat.dat
keylog_flag
false
keylog_folder
WinUpdat
mouse_option
false
mutex
Rmc-E10MWO
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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
800	powershell.exe
792	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
1932	WinUpdate.exe
768	WinUpdate.exe

Loads dropped DLL 2 IoCs

pid	Process
2140	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
1932	WinUpdate.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-E10MWO = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WinUpdate\\WinUpdate.exe\""	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-E10MWO = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WinUpdate\\WinUpdate.exe\""	WinUpdate.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2076 set thread context of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 1932 set thread context of 768	1932	WinUpdate.exe	37

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 5 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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinUpdate.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
792	powershell.exe
800	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	792	powershell.exe
Token: SeDebugPrivilege	800	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
768	WinUpdate.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 792	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	31
PID 2076 wrote to memory of 792	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	31
PID 2076 wrote to memory of 792	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	31
PID 2076 wrote to memory of 792	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	31
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2076 wrote to memory of 2140	2076	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	32
PID 2140 wrote to memory of 1932	2140	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	34
PID 2140 wrote to memory of 1932	2140	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	34
PID 2140 wrote to memory of 1932	2140	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	34
PID 2140 wrote to memory of 1932	2140	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	34
PID 2140 wrote to memory of 1932	2140	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	34
PID 2140 wrote to memory of 1932	2140	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	34
PID 2140 wrote to memory of 1932	2140	a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe	34
PID 1932 wrote to memory of 800	1932	WinUpdate.exe	35
PID 1932 wrote to memory of 800	1932	WinUpdate.exe	35
PID 1932 wrote to memory of 800	1932	WinUpdate.exe	35
PID 1932 wrote to memory of 800	1932	WinUpdate.exe	35
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37
PID 1932 wrote to memory of 768	1932	WinUpdate.exe	37

C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
"C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:792
- C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe
  "C:\Users\Admin\AppData\Local\Temp\a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2140
- - C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe
    "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1932
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:800
  - - C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe
      "C:\Users\Admin\AppData\Local\Temp\WinUpdate\WinUpdate.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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\Local\Temp\WinUpdate\WinUpdate.exe

Filesize
1.1MB

MD5
0f7e8e737582613d9ec805ea627bd1ff

SHA1
0a3aa2d8c65e2e03c900b8a148c1ad53f65289fd

SHA256
a63c26783dee7bb580a5cc5267a5b3e84ee9601b776d797175cfd70911135a76

SHA512
b384c1a5eab522bd4058602a1f61411729baef765bf459b5937722e2e974712942111da764bb26a5747b5406453c531c079de3437c2420b5cd5fc8fd802cb8cd

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\BLJLXG7CMQEILHDJKJ6E.temp

Filesize
7KB

MD5
5cef77e6632ec7a3cf47645874420f9a

SHA1
9bdf60025d955fa5e59cdf2ea4a2ffd6a17a323f

SHA256
46236d3281252eb4c05d639311d119b7a8d78f082e46435d3a0309a1ada2799e

SHA512
2efbeede2309ce035fdca08b9d13e08453e60553ffc0795edc4aae7cde18b060f87f71e8f9bada8b288fa9d1f16bfd9ad092552e6ed34359bfd4fd0d6609ffa6

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
53b36146aa74389cfc7fe53e5c2de963

SHA1
1b4254b742c0e298d5673881bf19562892456970

SHA256
3dbeba5a6d67149f71def88e848f6d7c5f8512daba29f420d56d6f9ddfb2159b

SHA512
9f563b5ec9671ee72fa2f01497766d9b26fdeb2f392316cbbd96eb51064459742e378a70c20eaf4461bcb557198a067bb0b3afb920e35e3a580626843cb8a791

Download Submit
memory/768-47-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/768-62-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-65-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-61-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/768-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-33-0x0000000005E00000-0x0000000005EC2000-memory.dmp

Filesize
776KB

Download
memory/1932-30-0x00000000013C0000-0x00000000014DE000-memory.dmp

Filesize
1.1MB

Download
memory/2076-1-0x00000000008B0000-0x00000000009CE000-memory.dmp

Filesize
1.1MB

Download
memory/2076-0-0x000000007485E000-0x000000007485F000-memory.dmp

Filesize
4KB

Download
memory/2076-5-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-6-0x0000000004A10000-0x0000000004AD2000-memory.dmp

Filesize
776KB

Download
memory/2076-2-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-3-0x0000000000530000-0x000000000054C000-memory.dmp

Filesize
112KB

Download
memory/2076-22-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-4-0x000000007485E000-0x000000007485F000-memory.dmp

Filesize
4KB

Download
memory/2140-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-9-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-13-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2140-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2140-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download