remcos | 0dc4aea2d906cfc836b44521c5e902cdadd1245bd8eb26c0ee9b87c1764c0fff

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
05/07/2022, 11:09

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General

Target
Outstanding Docs For Overdue Invoices.exe
Size 652KB
Sample220705-m84yrsadf6
SHA256 5482c9775362ce202cf44b082ce747f7e69f522a903ccc031c975cc714c82a8c
MD5 85ca9e9a8e9a2a6bbbccf9f0f8431efc
SHA1 f2c52fe7ef6a788753fdff30f6f3160bf78ca387
SHA512 607c921fba8b9a25915121217760f1bca9958cfb8c46f7c30aa95968221f57bc9274d991cb1f7573d192e5cc3fc5366aa38128a591317df6f1aba6ea8c1ebd9b
MD5 SHA1 SHA512

Score

10^/10

remcos iphone persistence rat

Malware Config

Extracted

Family

remcos

Botnet

iPHONE

blackwealth001.duckdns.org:2356

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-PV2AVP
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

Signatures

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

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	Outstanding Docs For Overdue Invoices.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\iphone = "\"C:\\Users\\Admin\\AppData\\Roaming\\iphone\\iphone.exe\""	Outstanding Docs For Overdue Invoices.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3096 set thread context of 216	3096	Outstanding Docs For Overdue Invoices.exe	90

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4128	powershell.exe
4128	powershell.exe
3096	Outstanding Docs For Overdue Invoices.exe
3096	Outstanding Docs For Overdue Invoices.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4128	powershell.exe
Token: SeDebugPrivilege	3096	Outstanding Docs For Overdue Invoices.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
216	InstallUtil.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3096 wrote to memory of 4128	3096	Outstanding Docs For Overdue Invoices.exe	82
PID 3096 wrote to memory of 4128	3096	Outstanding Docs For Overdue Invoices.exe	82
PID 3096 wrote to memory of 4128	3096	Outstanding Docs For Overdue Invoices.exe	82
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90
PID 3096 wrote to memory of 216	3096	Outstanding Docs For Overdue Invoices.exe	90

C:\Users\Admin\AppData\Local\Temp\Outstanding Docs For Overdue Invoices.exe
"C:\Users\Admin\AppData\Local\Temp\Outstanding Docs For Overdue Invoices.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3096
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4128
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:216

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/216-146-0x0000000000400000-0x000000000047B000-memory.dmp

Download

memory/216-145-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/216-144-0x0000000000400000-0x000000000047B000-memory.dmp

Download

memory/216-143-0x0000000000400000-0x000000000047B000-memory.dmp

Download

memory/216-142-0x0000000000400000-0x000000000047B000-memory.dmp

Download

memory/3096-140-0x0000000005B70000-0x0000000005C02000-memory.dmp

Download

memory/3096-131-0x0000000004F20000-0x0000000004F86000-memory.dmp

Download

memory/3096-130-0x0000000000520000-0x00000000005CA000-memory.dmp

Download

memory/4128-134-0x00000000050C0000-0x00000000056E8000-memory.dmp

Download

memory/4128-139-0x0000000006320000-0x000000000633A000-memory.dmp

Download

memory/4128-138-0x0000000007470000-0x0000000007AEA000-memory.dmp

Download

memory/4128-137-0x0000000005E20000-0x0000000005E3E000-memory.dmp

Download

memory/4128-136-0x0000000004EF0000-0x0000000004F56000-memory.dmp

Download

memory/4128-135-0x0000000004E50000-0x0000000004E72000-memory.dmp

Download

memory/4128-133-0x00000000024E0000-0x0000000002516000-memory.dmp

Download