remcos | 5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449

General

Target

5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe
Size

139KB
MD5

8e50d1e530bb5ca8f617b762971ded80
SHA1

d4bd64a4e5e4099f4e8528e43d577c2467deeb29
SHA256

5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449
SHA512

2134a7104e70ac19964beeef8c4f74af245d72b51ffbf110ef0d7cdf185ff31f3a2ea3a46be11a5469415c93a5ff5f48d2286cbc90779323cfd4ff8c28705bb0
SSDEEP

3072:xPd4n/M+WLcilrpgGH/GwY87mVmIXhIHVA:xP6/M+WLckOBhVmIYA

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

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
2172	wn2ra4ohzdr.exe
584	wn2ra4ohzdr.exe

Loads dropped DLL 1 IoCs

pid	Process
2396	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.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"	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2172 set thread context of 584	2172	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	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.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
584	wn2ra4ohzdr.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 2172	2396	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe	31
PID 2396 wrote to memory of 2172	2396	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe	31
PID 2396 wrote to memory of 2172	2396	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe	31
PID 2396 wrote to memory of 2172	2396	5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe	31
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32
PID 2172 wrote to memory of 584	2172	wn2ra4ohzdr.exe	32

C:\Users\Admin\AppData\Local\Temp\5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe
"C:\Users\Admin\AppData\Local\Temp\5f9e2a0a06642d138483f7f7c67b8efe635b57a1f9a6106b9e88bc3b78ea7449N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2396
- 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:2172
- - 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:584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
139KB

MD5
ff179423443d6e42b7ab2f40e653f484

SHA1
5f48095ba213847f149dd493a26acd9533645650

SHA256
089e276808eb7634e444ed3968e2ef41cdd128dfd6d7eb016ffabbeb0675dffa

SHA512
a197d24082dafca72c8df8985b01785f4136696003f4369829e09194b1bc73e07b33746a39d9aee14af8106f8894848392eac7cc5c83f22f4e5f418a29bb8046

Download Submit
memory/584-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/584-25-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/584-16-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/584-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/584-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/584-33-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/584-19-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/584-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/584-27-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2172-13-0x0000000074BF0000-0x00000000752DE000-memory.dmp

Filesize
6.9MB

Download
memory/2172-38-0x0000000074BF0000-0x00000000752DE000-memory.dmp

Filesize
6.9MB

Download
memory/2172-15-0x0000000074BF0000-0x00000000752DE000-memory.dmp

Filesize
6.9MB

Download
memory/2172-14-0x0000000000FB0000-0x0000000000FD8000-memory.dmp

Filesize
160KB

Download
memory/2172-37-0x0000000074BF0000-0x00000000752DE000-memory.dmp

Filesize
6.9MB

Download
memory/2396-3-0x0000000001F20000-0x0000000001F40000-memory.dmp

Filesize
128KB

Download
memory/2396-0-0x0000000074BFE000-0x0000000074BFF000-memory.dmp

Filesize
4KB

Download
memory/2396-2-0x0000000074BF0000-0x00000000752DE000-memory.dmp

Filesize
6.9MB

Download
memory/2396-11-0x0000000074BF0000-0x00000000752DE000-memory.dmp

Filesize
6.9MB

Download
memory/2396-1-0x00000000001F0000-0x0000000000218000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads