remcos | e5d28ec84e4b5f023e3f386cf7e0776850b67e2bad1299413885f3fdd757f58c

Analysis

max time kernel
144s
max time network
148s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:18

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General

Target

e67e28bf496e7f9625bf94a126253aac.exe
Size

143KB
MD5

e67e28bf496e7f9625bf94a126253aac
SHA1

0fa0895e7332dcd5671e5debb90931bbb19653af
SHA256

4549878374bcf9d4b5b872e0423eed14635eb8c9317c9d3da1bff246c6034aae
SHA512

5a6bcf68b213b843ae26a783fa08cb20bca4f8b5ec84fb1e8eff20034da57072cae71950fdbeff99bb7f573d8752c2ba083052f39bf3a7730682e7cf255f32d3
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVSsr:xP6/M+WLckOBhVmIYBr

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
2824	wn2ra4ohzdr.exe
1680	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2580	e67e28bf496e7f9625bf94a126253aac.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	e67e28bf496e7f9625bf94a126253aac.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2824 set thread context of 1680	2824	wn2ra4ohzdr.exe	30

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	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e67e28bf496e7f9625bf94a126253aac.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1680	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 2824	2580	e67e28bf496e7f9625bf94a126253aac.exe	29
PID 2580 wrote to memory of 2824	2580	e67e28bf496e7f9625bf94a126253aac.exe	29
PID 2580 wrote to memory of 2824	2580	e67e28bf496e7f9625bf94a126253aac.exe	29
PID 2580 wrote to memory of 2824	2580	e67e28bf496e7f9625bf94a126253aac.exe	29
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30
PID 2824 wrote to memory of 1680	2824	wn2ra4ohzdr.exe	30

C:\Users\Admin\AppData\Local\Temp\e67e28bf496e7f9625bf94a126253aac.exe
"C:\Users\Admin\AppData\Local\Temp\e67e28bf496e7f9625bf94a126253aac.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2580
- 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:2824
- - 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:1680

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

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

Filesize
143KB

MD5
01c65f3675ad4f4d06adb246f163a61c

SHA1
415265dc65a3eea6da99914a1cd73dc45c4168fc

SHA256
8424986f526bfc4f95c6b228d4bb623b22a0b3563b6c5ecb32103101c64916a0

SHA512
d2c0c6cf035b10c6e863a1ea8109e64aa25e5408b006fb2a80b86a05c8b79b5217fb806c99b5e108ef4e8f9c53912059956c16bc308cfd56cbdb0f639c5d50ea

Download Submit
memory/1680-26-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1680-23-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1680-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2580-2-0x0000000073C40000-0x000000007432E000-memory.dmp

Filesize
6.9MB

Download
memory/2580-0-0x0000000073C4E000-0x0000000073C4F000-memory.dmp

Filesize
4KB

Download
memory/2580-12-0x0000000073C40000-0x000000007432E000-memory.dmp

Filesize
6.9MB

Download
memory/2580-1-0x0000000001070000-0x0000000001098000-memory.dmp

Filesize
160KB

Download
memory/2580-3-0x0000000000410000-0x0000000000430000-memory.dmp

Filesize
128KB

Download
memory/2824-15-0x0000000073C40000-0x000000007432E000-memory.dmp

Filesize
6.9MB

Download
memory/2824-14-0x0000000000840000-0x0000000000868000-memory.dmp

Filesize
160KB

Download
memory/2824-13-0x0000000073C40000-0x000000007432E000-memory.dmp

Filesize
6.9MB

Download
memory/2824-40-0x0000000073C40000-0x000000007432E000-memory.dmp

Filesize
6.9MB

Download
memory/2824-41-0x0000000073C40000-0x000000007432E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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