remcos | 02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869

General

Target

02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe
Size

140KB
MD5

6dc84ad7ef1ac736530211cc881fd2a0
SHA1

5778b7fbeab9b188c22c6975e723ec5e67a69411
SHA256

02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869
SHA512

c4a769014f46856e9846690bd86753ef1ab74bef02ac1513db5f229bab8b6809020bc0d9ca8abef1d90349b55d295667058ce4261b00bb015e4dadca9d9be6fa
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVST:xP6/M+WLckOBhVmIYq

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe

Executes dropped EXE 2 IoCs

pid	Process
1648	wn2ra4ohzdr.exe
3900	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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1648 set thread context of 3900	1648	wn2ra4ohzdr.exe	97

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	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.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
3900	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2696 wrote to memory of 1648	2696	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe	90
PID 2696 wrote to memory of 1648	2696	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe	90
PID 2696 wrote to memory of 1648	2696	02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe	90
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97
PID 1648 wrote to memory of 3900	1648	wn2ra4ohzdr.exe	97

C:\Users\Admin\AppData\Local\Temp\02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe
"C:\Users\Admin\AppData\Local\Temp\02685371fedd6882df6bb6c55923098a25dd500b474d2c5162e9bb541dd78869N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2696
- 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:1648
- - 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:3900

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
140KB

MD5
298a6d99074ab012b2649d8b085dcf2e

SHA1
53c1a7408058e127b9073a4b78422ae1a1282862

SHA256
4c419a1f8a34ebb02ee9b3da420ae74bd06d4682b5a827eb3eda1e3cb058aeed

SHA512
8cabee9e97b55a413d89a420920e611831698bc46490efaa138aa7dab5c560fd4665738982d33c5da458be74828974dbb7a12f558e7cc6278f2d1799b905be93

Download Submit
memory/1648-38-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/1648-34-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/1648-23-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/1648-21-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/2696-22-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/2696-2-0x0000000005EE0000-0x0000000006484000-memory.dmp

Filesize
5.6MB

Download
memory/2696-5-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/2696-20-0x00000000750CE000-0x00000000750CF000-memory.dmp

Filesize
4KB

Download
memory/2696-4-0x0000000005A00000-0x0000000005A0A000-memory.dmp

Filesize
40KB

Download
memory/2696-0-0x00000000750CE000-0x00000000750CF000-memory.dmp

Filesize
4KB

Download
memory/2696-3-0x0000000005930000-0x00000000059C2000-memory.dmp

Filesize
584KB

Download
memory/2696-6-0x0000000005CD0000-0x0000000005CF0000-memory.dmp

Filesize
128KB

Download
memory/2696-1-0x0000000000F20000-0x0000000000F48000-memory.dmp

Filesize
160KB

Download
memory/3900-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3900-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3900-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3900-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3900-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3900-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads