remcos | 70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2024, 12:17

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General

Target
70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
Size 703KB
Sample240408-pf2daagh73
SHA256 70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92
MD5 cfeae297e7b47d957e9e275ede703064
SHA1 f31ea0ebf131e7186acf028687581318642eff74
SHA512 ebd1a85b790743ee2784a87b0d993151d6c7a53eb1ab5f72cd79d490c56aca511ae369dd04067187ea62bbd3cde803c1bc7b1d628696aff4e3c0ce5e21051e1a
SSDEEP 12288:HpIgdWtnyVADTJUSx1VUDp5eHKCREbiALl4JFznCy:XdWtnyVAJvx1VUKkOMOJ1C
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

81.17.17.70:1198

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
windowsfiles.exe
copy_folder
windowsfiles
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
windowsfiles
keylog_path
%AppData%
mouse_option
false
mutex
Rmc-NMB4R7
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

Checks computer location settings 2 TTPs 1 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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe

Executes dropped EXE 2 IoCs

pid	Process
4100	windowsfiles.exe
2388	windowsfiles.exe

Adds Run key to start application 2 TTPs 4 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\Rmc-NMB4R7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\windowsfiles\\windowsfiles.exe\""	windowsfiles.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-NMB4R7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\windowsfiles\\windowsfiles.exe\""	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NMB4R7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\windowsfiles\\windowsfiles.exe\""	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-NMB4R7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\windowsfiles\\windowsfiles.exe\""	windowsfiles.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1892 set thread context of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 4100 set thread context of 2388	4100	windowsfiles.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2388	windowsfiles.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 1892 wrote to memory of 2420	1892	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	88
PID 2420 wrote to memory of 4100	2420	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	89
PID 2420 wrote to memory of 4100	2420	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	89
PID 2420 wrote to memory of 4100	2420	70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe	89
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90
PID 4100 wrote to memory of 2388	4100	windowsfiles.exe	90

C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
"C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1892
- C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe
  "C:\Users\Admin\AppData\Local\Temp\70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2420
- - C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe
    "C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4100
  - - C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe
      "C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:2388

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

logs.dat

Path C:\Users\Admin\AppData\Roaming\windowsfiles\logs.dat
Size 144B
SHA256 e348fca04d9d0e306c7b340ca1e35158ec78fccd495d000ad4a059735842c82a
MD5 955a9a3f3deca5ab7f30db573b67ca5b
SHA1 c067a46b0d4a6f959ae53b7c451d30d193f6446b
SHA512 b130648ac7d36f9e235bb53ccb226060c4267659120c0a38df66c2b81b576767e20c219c5d9efa94945f9166893dbf46543fdcf94ee862bcc75605e788f7523b
MD5 SHA1 SHA512

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windowsfiles.exe

Path C:\Users\Admin\AppData\Roaming\windowsfiles\windowsfiles.exe
Size 703KB
SHA256 70c45fc843dee69c8a55b7910d91d0b4dd371c7ea59d8eb43ff3d79c19064b92
MD5 cfeae297e7b47d957e9e275ede703064
SHA1 f31ea0ebf131e7186acf028687581318642eff74
SHA512 ebd1a85b790743ee2784a87b0d993151d6c7a53eb1ab5f72cd79d490c56aca511ae369dd04067187ea62bbd3cde803c1bc7b1d628696aff4e3c0ce5e21051e1a
SSDEEP 12288:HpIgdWtnyVADTJUSx1VUDp5eHKCREbiALl4JFznCy:XdWtnyVAJvx1VUKkOMOJ1C
MD5 SHA1 SHA512 SSDEEP

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memory/1892-8-0x0000000074A80000-0x0000000075230000-memory.dmp

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memory/1892-1-0x0000000074A80000-0x0000000075230000-memory.dmp

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memory/1892-2-0x0000000005B60000-0x0000000006104000-memory.dmp

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memory/1892-3-0x00000000055A0000-0x00000000055B0000-memory.dmp

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memory/1892-0-0x0000000000C00000-0x0000000000CB6000-memory.dmp

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memory/2388-48-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-55-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-74-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-73-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-68-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-66-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-29-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-61-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-30-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-32-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-34-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-35-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-36-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-41-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-42-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-60-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-47-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2388-54-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2420-5-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2420-9-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2420-4-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2420-22-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2420-7-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4100-31-0x0000000073AD0000-0x0000000074280000-memory.dmp

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memory/4100-25-0x0000000004E90000-0x0000000004EA0000-memory.dmp

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memory/4100-24-0x0000000073AD0000-0x0000000074280000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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