remcos | b8c5e2c8477706f3f54e152443718dcec270889002289aa1730eabc5ba3f312f

Analysis

max time kernel
148s
max time network
165s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:09

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General

Target

27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.exe
Size

135KB
MD5

62e5ced86ccb25c5692dda3779968bbf
SHA1

5d329227cb51365c98b76fa301c7491064e37824
SHA256

27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20
SHA512

1463b8b98848cb10d72e654ed2f872fedb9ae4fe394c1974d328c04b552937fcf8d4e33bf37fc324e726cff8e9ee3486b5bfc69d6edbb7199522736d3de11092
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKA:xPd4n/M+WLcilrpgGH/GwY87mVmIXQ

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
Remcos family
remcos

Executes dropped EXE 2 IoCs

pid	Process
2920	wn2ra4ohzdr.exe
3004	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2780	27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2920 set thread context of 3004	2920	wn2ra4ohzdr.exe	31

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	27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.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
3004	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 2920	2780	27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.exe	30
PID 2780 wrote to memory of 2920	2780	27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.exe	30
PID 2780 wrote to memory of 2920	2780	27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.exe	30
PID 2780 wrote to memory of 2920	2780	27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.exe	30
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31
PID 2920 wrote to memory of 3004	2920	wn2ra4ohzdr.exe	31

C:\Users\Admin\AppData\Local\Temp\27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.exe
"C:\Users\Admin\AppData\Local\Temp\27f2cdcc8ecc897dfe40d5af2b4122fc9a40843d60a0506a4a2d5044650a5f20.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2780
- 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:2920
- - 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:3004

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

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

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

Filesize
135KB

MD5
0db0d675ec33102cbd797840a26b1884

SHA1
bd9fa8033ab575d5ed2bf2ab99dc6ccdba008f9f

SHA256
a79db7209303bd6702ee9976997ca050453fac7f3ce8bbf8cfb80917fb774be4

SHA512
5e756d2ecf7ec32e243fe08c5268a69d7311b66db31617c4122a8c3e29e9eeb9b079c8fcb19c558680348425411d97f74ee78fdee9a6d21e38671aac295ec6a8

Download Submit
memory/2780-1-0x0000000000E90000-0x0000000000EB8000-memory.dmp

Filesize
160KB

Download
memory/2780-2-0x00000000746E0000-0x0000000074DCE000-memory.dmp

Filesize
6.9MB

Download
memory/2780-3-0x0000000000590000-0x00000000005B0000-memory.dmp

Filesize
128KB

Download
memory/2780-12-0x00000000746EE000-0x00000000746EF000-memory.dmp

Filesize
4KB

Download
memory/2780-14-0x00000000746E0000-0x0000000074DCE000-memory.dmp

Filesize
6.9MB

Download
memory/2780-0-0x00000000746EE000-0x00000000746EF000-memory.dmp

Filesize
4KB

Download
memory/2920-41-0x00000000746E0000-0x0000000074DCE000-memory.dmp

Filesize
6.9MB

Download
memory/2920-15-0x0000000000830000-0x0000000000858000-memory.dmp

Filesize
160KB

Download
memory/2920-13-0x00000000746E0000-0x0000000074DCE000-memory.dmp

Filesize
6.9MB

Download
memory/2920-16-0x00000000746E0000-0x0000000074DCE000-memory.dmp

Filesize
6.9MB

Download
memory/2920-42-0x00000000746E0000-0x0000000074DCE000-memory.dmp

Filesize
6.9MB

Download
memory/3004-31-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3004-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3004-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3004-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3004-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3004-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3004-40-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3004-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3004-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3004-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads