remcos | 52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3

General

Target

52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe
Size

588KB
MD5

00255e3ecc52f3aae1a294ee9a8f5ddf
SHA1

babb7d635c4b2313c83a711e5267f9599a7c92ee
SHA256

52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3
SHA512

bc749177bfe5b2181c265cd92ff20120f25d79785df93ab8fb33e34c9391f66778be1f139feea1e0376215e1a95dd6a301ea46269dcf0615b645db856ab62006

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Version

2.4.5 Pro

Botnet

RemoteHost

C2

95.140.125.47:6666

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-VWRCN2
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Executes dropped EXE 2 IoCs

pid	Process
2700	filename.exe
1332	filename.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows\CurrentVersion\Run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Registry Key Name = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subfolder\\filename.vbs -0"	WScript.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2700 set thread context of 1332	2700	filename.exe	91

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000_Classes\Local Settings	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
540	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe
2700	filename.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 540 wrote to memory of 2244	540	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe	89
PID 540 wrote to memory of 2244	540	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe	89
PID 540 wrote to memory of 2244	540	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe	89
PID 540 wrote to memory of 2700	540	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe	90
PID 540 wrote to memory of 2700	540	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe	90
PID 540 wrote to memory of 2700	540	52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe	90
PID 2700 wrote to memory of 1332	2700	filename.exe	91
PID 2700 wrote to memory of 1332	2700	filename.exe	91
PID 2700 wrote to memory of 1332	2700	filename.exe	91

C:\Users\Admin\AppData\Local\Temp\52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe
"C:\Users\Admin\AppData\Local\Temp\52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:540
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\subfolder\filename.vbs"
  2⤵
  - Adds Run key to start application
  PID:2244
- C:\Users\Admin\AppData\Local\Temp\subfolder\filename.exe
  "C:\Users\Admin\AppData\Local\Temp\subfolder\filename.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2700
- - C:\Users\Admin\AppData\Local\Temp\subfolder\filename.exe
    C:\Users\Admin\AppData\Local\Temp\subfolder\filename.exe"
    3⤵
    - Executes dropped EXE
    PID:1332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\subfolder\filename.exe

Filesize
588KB

MD5
00255e3ecc52f3aae1a294ee9a8f5ddf

SHA1
babb7d635c4b2313c83a711e5267f9599a7c92ee

SHA256
52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3

SHA512
bc749177bfe5b2181c265cd92ff20120f25d79785df93ab8fb33e34c9391f66778be1f139feea1e0376215e1a95dd6a301ea46269dcf0615b645db856ab62006

Download Submit
C:\Users\Admin\AppData\Local\Temp\subfolder\filename.exe

Filesize
588KB

MD5
00255e3ecc52f3aae1a294ee9a8f5ddf

SHA1
babb7d635c4b2313c83a711e5267f9599a7c92ee

SHA256
52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3

SHA512
bc749177bfe5b2181c265cd92ff20120f25d79785df93ab8fb33e34c9391f66778be1f139feea1e0376215e1a95dd6a301ea46269dcf0615b645db856ab62006

Download Submit
C:\Users\Admin\AppData\Local\Temp\subfolder\filename.exe

Filesize
588KB

MD5
00255e3ecc52f3aae1a294ee9a8f5ddf

SHA1
babb7d635c4b2313c83a711e5267f9599a7c92ee

SHA256
52d4edab8c76b2e0ff01eb9ca2fff68ba150a617fbba936a642e886cb45421b3

SHA512
bc749177bfe5b2181c265cd92ff20120f25d79785df93ab8fb33e34c9391f66778be1f139feea1e0376215e1a95dd6a301ea46269dcf0615b645db856ab62006

Download Submit
C:\Users\Admin\AppData\Local\Temp\subfolder\filename.vbs

Filesize
1024B

MD5
e6ddff0cba9efe622cb701d417f4781d

SHA1
44ae0fc753ec76e1ce3840c629176c4f6c6945cc

SHA256
5f513b6f4be4f95860a0d52f0f400d8e3c2804bd6534e8bc1ddc8de4f7afaf43

SHA512
7ae88174d2bb42eedcd03df22da775a46dc6ee6f90a37d606f91d68e9c4400a942574f9a38404a1ed6e86445cd63a7e29a17b3df66f547444a7192e3de3eb9ce

Download Submit
memory/540-139-0x00000000029C0000-0x00000000029C7000-memory.dmp

Filesize
28KB

Download
memory/540-143-0x00000000774B0000-0x0000000077653000-memory.dmp

Filesize
1.6MB

Download
memory/540-132-0x00000000029C0000-0x00000000029C7000-memory.dmp

Filesize
28KB

Download
memory/540-133-0x00007FFE37530000-0x00007FFE37725000-memory.dmp

Filesize
2.0MB

Download
memory/540-141-0x00007FFE37530000-0x00007FFE37725000-memory.dmp

Filesize
2.0MB

Download
memory/540-134-0x00000000774B0000-0x0000000077653000-memory.dmp

Filesize
1.6MB

Download
memory/1332-158-0x00007FFE37530000-0x00007FFE37725000-memory.dmp

Filesize
2.0MB

Download
memory/1332-161-0x00000000774B0000-0x0000000077653000-memory.dmp

Filesize
1.6MB

Download
memory/1332-160-0x00000000004E0000-0x00000000004E7000-memory.dmp

Filesize
28KB

Download
memory/1332-159-0x00000000774B0000-0x0000000077653000-memory.dmp

Filesize
1.6MB

Download
memory/1332-154-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1332-152-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/1332-151-0x00000000004E0000-0x00000000004E7000-memory.dmp

Filesize
28KB

Download
memory/2700-150-0x00000000774B0000-0x0000000077653000-memory.dmp

Filesize
1.6MB

Download
memory/2700-149-0x00007FFE37530000-0x00007FFE37725000-memory.dmp

Filesize
2.0MB

Download
memory/2700-145-0x00000000006A0000-0x00000000006A7000-memory.dmp

Filesize
28KB

Download
memory/2700-148-0x00000000006A0000-0x00000000006A7000-memory.dmp

Filesize
28KB

Download

Analysis

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