remcos | 0e43af051e536e7c731f3d856baaf644e474c4c80ea22cb0fb4386d42c2e1056

General

Target

xtuHcaTJtwiA.exe
Size

469KB
MD5

fc489aa077f6db53303bcf8d0404528a
SHA1

bfeace1de4d3ea72b231ea4d1ebe576bc4cdf2af
SHA256

0e43af051e536e7c731f3d856baaf644e474c4c80ea22cb0fb4386d42c2e1056
SHA512

a1c8a0c832b1e110a75e229a4f6f37c0e9682353de574e4dcc1a0312197f22dd074f3c8ab90a09ce685b06d231e1cf80c86283e7b129531617aa1eeba0b29fa1
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSDn9:uiLJbpI7I2WhQqZ7D9

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

pedrocachs.blogdns.com:1000

Attributes

audio_folder
MicRecords
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
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-OC07GB
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

Signatures

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

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

remcos.exextuHcaTJtwiA.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	xtuHcaTJtwiA.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	xtuHcaTJtwiA.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	remcos.exe

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

xtuHcaTJtwiA.exeWScript.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	xtuHcaTJtwiA.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

Processes:

remcos.exe

pid	Process
220	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

xtuHcaTJtwiA.exeremcos.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	xtuHcaTJtwiA.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	xtuHcaTJtwiA.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

xtuHcaTJtwiA.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings	xtuHcaTJtwiA.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

xtuHcaTJtwiA.exeWScript.execmd.exe

description	pid	Process	procid_target
PID 1800 wrote to memory of 4416	1800	xtuHcaTJtwiA.exe	90
PID 1800 wrote to memory of 4416	1800	xtuHcaTJtwiA.exe	90
PID 1800 wrote to memory of 4416	1800	xtuHcaTJtwiA.exe	90
PID 4416 wrote to memory of 4128	4416	WScript.exe	91
PID 4416 wrote to memory of 4128	4416	WScript.exe	91
PID 4416 wrote to memory of 4128	4416	WScript.exe	91
PID 4128 wrote to memory of 220	4128	cmd.exe	93
PID 4128 wrote to memory of 220	4128	cmd.exe	93
PID 4128 wrote to memory of 220	4128	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\xtuHcaTJtwiA.exe
"C:\Users\Admin\AppData\Local\Temp\xtuHcaTJtwiA.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:4416
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4128
  - - C:\ProgramData\Remcos\remcos.exe
      C:\ProgramData\Remcos\remcos.exe
      4⤵
      Adds policy Run key to start application
      Executes dropped EXE
      Adds Run key to start application
      PID:220

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1424 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
1⤵
PID:4676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Remcos\remcos.exe

Filesize
469KB

MD5
fc489aa077f6db53303bcf8d0404528a

SHA1
bfeace1de4d3ea72b231ea4d1ebe576bc4cdf2af

SHA256
0e43af051e536e7c731f3d856baaf644e474c4c80ea22cb0fb4386d42c2e1056

SHA512
a1c8a0c832b1e110a75e229a4f6f37c0e9682353de574e4dcc1a0312197f22dd074f3c8ab90a09ce685b06d231e1cf80c86283e7b129531617aa1eeba0b29fa1

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

Filesize
386B

MD5
1ec6289c6fd4c2ded6b2836ed28cbeb5

SHA1
c4e08195e6c640eb8860acc03fda1d649b4fe070

SHA256
6efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2

SHA512
20bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads