remcos | 707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660

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25-01-2025 09:39

250125-lmqctaymal 7

25-01-2025 09:10

250125-k5g9gsxnhq 10

25-01-2025 09:08

250125-k3v3kawlet 3

25-01-2025 09:05

250125-k2c6csxmfk 10

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-01-2025 09:05

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General

Target

707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.exe
Size

140KB
MD5

5575ea822efee57068636d5d234e7cd0
SHA1

a02d06be42fc19206663a5beb8fbd90634c7f09d
SHA256

707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660
SHA512

4c08e62df1d7ed2b119f74ba130755f6c524058866669c956ad27c17a4bff530349b20febddcc289067ba8e592fa257b8bc45d3c0fbbd7be60825e54ede6238c
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVSYK:xP6/M+WLckOBhVmIYPK

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
2676	wn2ra4ohzdr.exe
2540	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2956	707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\raj4dkhhiap = "C:\\Users\\Admin\\AppData\\Roaming\\raj4dkhhiap\\wn2ra4ohzdr.exe"	707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2676 set thread context of 2540	2676	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	707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.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
2540	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 2676	2956	707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.exe	31
PID 2956 wrote to memory of 2676	2956	707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.exe	31
PID 2956 wrote to memory of 2676	2956	707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.exe	31
PID 2956 wrote to memory of 2676	2956	707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.exe	31
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32
PID 2676 wrote to memory of 2540	2676	wn2ra4ohzdr.exe	32

C:\Users\Admin\AppData\Local\Temp\707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.exe
"C:\Users\Admin\AppData\Local\Temp\707a92f8be7ef3e0fd8575d9541ca1181b9fb3f1822f27640114c7e69261b660N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2956
- 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:2676
- - 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:2540

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
140KB

MD5
03933c5d7b6f265aad4d68a909859a0d

SHA1
08922986b7ad34890500e520db0d60bf224f2149

SHA256
11f37cd4a31bf5151c2d839844361aeff78c53b8aa5104976b6e13cf6d8b2148

SHA512
a166dc86fbd2a420d4d4ed68f212b4b3ea2c8f431e4bf0b76ef114060b01fc6479b30b5de4cf62a0bd9edd8354ff0e37c9d92cfde6bafea16d2b9067a5b7c347

Download Submit
memory/2540-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-24-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-29-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-20-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2540-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2676-12-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2676-34-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2676-15-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2676-14-0x0000000000870000-0x0000000000898000-memory.dmp

Filesize
160KB

Download
memory/2676-33-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2956-3-0x00000000004C0000-0x00000000004E0000-memory.dmp

Filesize
128KB

Download
memory/2956-0-0x000000007469E000-0x000000007469F000-memory.dmp

Filesize
4KB

Download
memory/2956-2-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2956-13-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2956-1-0x0000000000BA0000-0x0000000000BC8000-memory.dmp

Filesize
160KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads