remcos | aff3e08b50336ce6a1cfe39c45d32d918dc6f190662aef666addb193f44d47a8

Analysis

max time kernel
148s
max time network
156s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:13

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

760a200139494a0bec4f29f831cde04c.exe
Size

136KB
MD5

760a200139494a0bec4f29f831cde04c
SHA1

1981019ac5677bc5499c11e8c50bd098974afb1f
SHA256

60bd5a161f7e5f3a1ac6538b981822bb8f17293ebefb350b3d62d180d79c4045
SHA512

363d6ccb8ad40e6d8f7a02c9d92e9ea273d0fffef8f488ad6339f6359bf4ffe0904d9b1abcd9a5fda5b27cd438c74bf34b653593f3abd1e68b55a0eee307e7cc
SSDEEP

1536:ITHiPBX4nDzMyRXGHrc9YRHqbTypgpmb5Q+ZReSdhk/J+YLgD3mrxb53cSuYQjKV:xPd4n/M+WLcilrpgGH/GwY87mVmIXl

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
2788	wn2ra4ohzdr.exe
2636	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2928	760a200139494a0bec4f29f831cde04c.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-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	760a200139494a0bec4f29f831cde04c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2788 set thread context of 2636	2788	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	760a200139494a0bec4f29f831cde04c.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
2636	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2928 wrote to memory of 2788	2928	760a200139494a0bec4f29f831cde04c.exe	30
PID 2928 wrote to memory of 2788	2928	760a200139494a0bec4f29f831cde04c.exe	30
PID 2928 wrote to memory of 2788	2928	760a200139494a0bec4f29f831cde04c.exe	30
PID 2928 wrote to memory of 2788	2928	760a200139494a0bec4f29f831cde04c.exe	30
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31
PID 2788 wrote to memory of 2636	2788	wn2ra4ohzdr.exe	31

C:\Users\Admin\AppData\Local\Temp\760a200139494a0bec4f29f831cde04c.exe
"C:\Users\Admin\AppData\Local\Temp\760a200139494a0bec4f29f831cde04c.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2928
- 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:2788
- - 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:2636

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
136KB

MD5
f6e0b0c37fa44c7e865e6d8098be3051

SHA1
7fb1d7b0156232c58a1621fc13ddedce9bb95586

SHA256
7d7dccfd1a46109f5da0c6a55857b8c481d67cad0b97129c72989b26680d1d3c

SHA512
bc58b8c3dfda9f23e7f13b0d29cab00bdf4d914af82a6f9388eaf34c4cdbe7ced3941403485adce6d596b1833965be394830f1602679f3255f667ab5460b10b5

Download Submit
memory/2636-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2636-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2636-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2788-14-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/2788-15-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/2788-12-0x0000000001110000-0x0000000001138000-memory.dmp

Filesize
160KB

Download
memory/2788-40-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/2788-41-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/2928-2-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/2928-0-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

Filesize
4KB

Download
memory/2928-13-0x0000000074C50000-0x000000007533E000-memory.dmp

Filesize
6.9MB

Download
memory/2928-1-0x0000000000F50000-0x0000000000F78000-memory.dmp

Filesize
160KB

Download
memory/2928-3-0x00000000008D0000-0x00000000008F0000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads