remcos | c1be767404a3d71717a54b01ebfa91ebff578dad8dd518a1a49012bcf012738e

Resubmissions

27/07/2024, 17:08

240727-vnrrpszapr 10

24/07/2024, 13:55

240724-q8e67aygrr 10

Analysis

max time kernel
144s
max time network
147s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
24/07/2024, 13:55

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General

Target

725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe
Size

138KB
MD5

f328e536916a2df28175ab0f152f8ad0
SHA1

69f18d725d693f7219b4701f2c3d334841c55179
SHA256

725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b
SHA512

e1671712a01799f479e15ec03c47ec979300322fe941128566cb3bf7b66314bbb76a54e15712b058d1706335ca7190bb952097398e04f26d31fe59aa5737b97e
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHc:xP6/M+WLckOBhVmIl

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

Executes dropped EXE 2 IoCs

pid	Process
2616	wn2ra4ohzdr.exe
2604	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2812	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.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-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2616 set thread context of 2604	2616	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	wn2ra4ohzdr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wn2ra4ohzdr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2604	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2812 wrote to memory of 2616	2812	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	30
PID 2812 wrote to memory of 2616	2812	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	30
PID 2812 wrote to memory of 2616	2812	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	30
PID 2812 wrote to memory of 2616	2812	725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe	30
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31
PID 2616 wrote to memory of 2604	2616	wn2ra4ohzdr.exe	31

C:\Users\Admin\AppData\Local\Temp\725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe
"C:\Users\Admin\AppData\Local\Temp\725827cfa16ee9aa789f4cb0a7086dd4d6a5ab381461fa8ea0c95aac5a24b57b.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2812
- 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:2616
- - 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:2604

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
138KB

MD5
682168ad4d435a9678e9ba8ec4504b7b

SHA1
a1364e6018cb2f7b518de43b67e63cf6effa44de

SHA256
4231a7fefa072f970f0c3cdb6792c9906bcba645b71ad2933f445007b59c557a

SHA512
95e66c236f3c4598aad11c85b1dfc4685c870c78d802ef52ba5fd483ad13e7f291057316a76cf252d3dc56534153739fe72cbc6d28ebcff10ebfe241be17bbeb

Download Submit
memory/2604-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2604-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2604-34-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2604-33-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2604-21-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2604-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2604-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2604-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2604-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2616-13-0x0000000000D30000-0x0000000000D58000-memory.dmp

Filesize
160KB

Download
memory/2616-14-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/2616-15-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/2616-37-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/2812-2-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/2812-12-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/2812-0-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/2812-1-0x0000000001060000-0x0000000001088000-memory.dmp

Filesize
160KB

Download
memory/2812-3-0x00000000009E0000-0x0000000000A00000-memory.dmp

Filesize
128KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads