remcos | 725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
23/07/2024, 16:55

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General

Target
725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe
Size 138KB
Sample240723-vfdvwasfrg
SHA256 725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b
MD5 f328e536916a2df28175ab0f152f8ad0
SHA1 69f18d725d693f7219b4701f2c3d334841c55179
SHA512 e1671712a01799f479e15ec03c47ec979300322fe941128566cb3bf7b66314bbb76a54e15712b058d1706335ca7190bb952097398e04f26d31fe59aa5737b97e
SSDEEP 3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHc:xP6/M+WLckOBhVmIl
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

systemcontrol.ddns.net:45000
systemcontrol2.ddns.net:45000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
OfficeUpgrade.exe
copy_folder
OfficeUpgrade
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
Upgrader.dat
keylog_flag
false
keylog_folder
Upgrader
keylog_path
%AppData%
mouse_option
false
mutex
req_khauflaoyr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
OfficeUpgrade
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-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe

Executes dropped EXE 2 IoCs

pid	Process
1944	wn2ra4ohzdr.exe
4936	wn2ra4ohzdr.exe

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-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1944 set thread context of 4936	1944	wn2ra4ohzdr.exe	95

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 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4936	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2364 wrote to memory of 1944	2364	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	92
PID 2364 wrote to memory of 1944	2364	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	92
PID 2364 wrote to memory of 1944	2364	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	92
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95
PID 1944 wrote to memory of 4936	1944	wn2ra4ohzdr.exe	95

C:\Users\Admin\AppData\Local\Temp\725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe
"C:\Users\Admin\AppData\Local\Temp\725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
  "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1944
- - C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
    "C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4936

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

wn2ra4ohzdr.exe

Path C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe
Size 138KB
SHA256 31d71b720014c74c368ff8a3729d8e1c7a343148c011f73da0405322def292cc
MD5 e3c967669fac7d4b6de4ef8ccee7558a
SHA1 89eb0081e382e965819dd8c67343dc471630defd
SHA512 2041d485e0214282197d7c035d25f1afeeaef644871499f39c242d5cc4230ad78c1d5e39ca1aa527e176de6cb6fe7e3a108991dc9a67ee60db34aab84f239a68
SSDEEP 3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHR:xP6/M+WLckOBhVmIA
MD5 SHA1 SHA512 SSDEEP

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memory/1944-36-0x0000000074560000-0x0000000074D10000-memory.dmp

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memory/1944-22-0x0000000074560000-0x0000000074D10000-memory.dmp

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memory/1944-21-0x0000000074560000-0x0000000074D10000-memory.dmp

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memory/2364-20-0x0000000074560000-0x0000000074D10000-memory.dmp

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memory/2364-1-0x0000000000970000-0x0000000000998000-memory.dmp

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memory/2364-6-0x0000000005840000-0x0000000005860000-memory.dmp

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memory/2364-4-0x0000000005540000-0x000000000554A000-memory.dmp

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memory/2364-0-0x000000007456E000-0x000000007456F000-memory.dmp

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memory/2364-3-0x0000000005390000-0x0000000005422000-memory.dmp

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memory/2364-2-0x00000000058A0000-0x0000000005E44000-memory.dmp

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memory/2364-5-0x0000000074560000-0x0000000074D10000-memory.dmp

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memory/4936-23-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4936-25-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4936-24-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4936-29-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4936-30-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/4936-26-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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