remcos | 20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684

General

Target

20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe
Size

138KB
MD5

a72a99b91f5e47c3a6f40ef983343680
SHA1

a8cfc9541ea81f16d67ebd7900c8020b563d04e7
SHA256

20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684
SHA512

9d9d71e2f00d615c428ea409998ece26a7ba0dd8cc36a3ffa254ba775fcab03f6cca05d1967c9204a9468d1f48c556e34e5cccbb82cc8f1d4e31c592c41f9937
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjK6:xPd4n/M+WLcilrpgGH/GwY87mVmIXK

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

Executes dropped EXE 2 IoCs

pid	Process
924	wn2ra4ohzdr.exe
2684	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2848	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 924 set thread context of 2684	924	wn2ra4ohzdr.exe	32

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	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2684	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 924	2848	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe	31
PID 2848 wrote to memory of 924	2848	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe	31
PID 2848 wrote to memory of 924	2848	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe	31
PID 2848 wrote to memory of 924	2848	20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe	31
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32
PID 924 wrote to memory of 2684	924	wn2ra4ohzdr.exe	32

C:\Users\Admin\AppData\Local\Temp\20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe
"C:\Users\Admin\AppData\Local\Temp\20f3e8b4bcc6bb2ff900b0b95332b8d4284077269023a14c2b2f13625ced2684N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2848
- 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:924
- - 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:2684

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

System Information Discovery

1

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

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

Filesize
138KB

MD5
39343ed20dd0d7b0f6cac98cdd85e173

SHA1
5ec5d9587aeb3b3c89957855c00f91ad81a3df18

SHA256
2bf169e9c1d9e5b164ce41d71ce8189f7f7d6f8c46e7f11e4e6236e6cc39e5b4

SHA512
b47355a9bc14e246a92878d934a8d00c3638f4c2e8ff47d4d0870cbdf61e13f3169ed4042082400959a7d69f6666bcabb594a84b275dc5654973267550010cd0

Download Submit
memory/924-12-0x0000000074A10000-0x00000000750FE000-memory.dmp

Filesize
6.9MB

Download
memory/924-39-0x0000000074A10000-0x00000000750FE000-memory.dmp

Filesize
6.9MB

Download
memory/924-38-0x0000000074A10000-0x00000000750FE000-memory.dmp

Filesize
6.9MB

Download
memory/924-15-0x0000000074A10000-0x00000000750FE000-memory.dmp

Filesize
6.9MB

Download
memory/924-14-0x0000000001280000-0x00000000012A8000-memory.dmp

Filesize
160KB

Download
memory/2684-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-42-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2684-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-37-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-34-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2684-33-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2848-0-0x0000000074A1E000-0x0000000074A1F000-memory.dmp

Filesize
4KB

Download
memory/2848-13-0x0000000074A10000-0x00000000750FE000-memory.dmp

Filesize
6.9MB

Download
memory/2848-2-0x0000000074A10000-0x00000000750FE000-memory.dmp

Filesize
6.9MB

Download
memory/2848-1-0x0000000001160000-0x0000000001188000-memory.dmp

Filesize
160KB

Download
memory/2848-3-0x00000000006A0000-0x00000000006C0000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads