remcos | 587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86

General

Target

587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe
Size

141KB
MD5

1c96c620f712a5c3e8e9d001d78e5fbf
SHA1

c8fc0b1880b3a05ed94b7a27d21faf565d889dfa
SHA256

587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86
SHA512

613a353352a7d2c234189253c4178bcc999c583c093b9a131f1fdc287a1efcc9cee9d89b860a32809f2c85f2310f6d3ee590a676c6994f3d7d11088f3406ca2a
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVSlE4:xP6/M+WLckOBhVmIYu

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

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
Remcos family
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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe

Executes dropped EXE 2 IoCs

pid	Process
2880	wn2ra4ohzdr.exe
4292	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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2880 set thread context of 4292	2880	wn2ra4ohzdr.exe	87

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	587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4292	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 2880	2340	587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe	82
PID 2340 wrote to memory of 2880	2340	587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe	82
PID 2340 wrote to memory of 2880	2340	587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe	82
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87
PID 2880 wrote to memory of 4292	2880	wn2ra4ohzdr.exe	87

C:\Users\Admin\AppData\Local\Temp\587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe
"C:\Users\Admin\AppData\Local\Temp\587b94eb4118f67cb7c9f6c51c84ae2a3033e09992e2a22bdd5fd7e93deede86.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2340
- 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:2880
- - 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:4292

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

Query Registry

1

T1012

System Information Discovery

2

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:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe

Filesize
141KB

MD5
664723b2ce9ae8c18a10eadbd7925d60

SHA1
63055d6a19d54f52b005132b3442e7b5a8de6d02

SHA256
5820cd74ee768d3fe1e5b12681784c5fbe611e52d2e09bc2dfbe265e703cf11d

SHA512
cdac7e92b7494200e651c281091dd1b6d3f7befcb08adc3b53e82d5125792c9078b3d6078f84532f02df6554b0eda179c17ff5f65531d65b01f882f51e0a38a3

Download Submit
memory/2340-0-0x0000000074EFE000-0x0000000074EFF000-memory.dmp

Filesize
4KB

Download
memory/2340-1-0x0000000000060000-0x0000000000088000-memory.dmp

Filesize
160KB

Download
memory/2340-2-0x0000000005140000-0x00000000056E4000-memory.dmp

Filesize
5.6MB

Download
memory/2340-3-0x0000000004A70000-0x0000000004B02000-memory.dmp

Filesize
584KB

Download
memory/2340-4-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/2340-5-0x0000000004B20000-0x0000000004B2A000-memory.dmp

Filesize
40KB

Download
memory/2340-6-0x0000000004BF0000-0x0000000004C10000-memory.dmp

Filesize
128KB

Download
memory/2340-18-0x0000000074EFE000-0x0000000074EFF000-memory.dmp

Filesize
4KB

Download
memory/2340-21-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/2880-22-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/2880-23-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/2880-34-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/2880-36-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/4292-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4292-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4292-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4292-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4292-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4292-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads