remcos | 437cb3ec242f9cfb0c579d68d192c034d54b8c7d976eecb6c48d0535d12308ba

General

Target

New Order xls.exe
Size

1.1MB
MD5

4ab071bd0b8d7a699ef70fe29919fc95
SHA1

66bf5bcc31d5e443409671d855730f766e06dcb7
SHA256

38724091a495f134db5f215994dade2f44822dee3408a13e360024a447cc0fa0
SHA512

81e0cc4fc3ffe7abfd3e9c005bb9e9ce4262b4b9020e2e08b8a8735604e8d937bf6fc41c5f41553c8ed9e06bb562947105d2e65fc93cbb12aab6fa05ce170189
SSDEEP

24576:jToVBBGp/W/96XefN7YK4Fh8/ijMQUG5Oa65gepqnbRJ:jToFE/hcYKqKim95geIbRJ

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Version

3.3.2 Pro

Botnet

RemoteHost

C2

azuite.ddns.net:7667

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
stub1-LT34V5
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
notepad;solitaire;

Signatures

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2764	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2528 set thread context of 2908	2528	New Order xls.exe	35

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 4 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	New Order xls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2836	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2528	New Order xls.exe
2528	New Order xls.exe
2528	New Order xls.exe
2764	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2528	New Order xls.exe
Token: SeDebugPrivilege	2764	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2908	RegSvcs.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2528 wrote to memory of 2764	2528	New Order xls.exe	31
PID 2528 wrote to memory of 2764	2528	New Order xls.exe	31
PID 2528 wrote to memory of 2764	2528	New Order xls.exe	31
PID 2528 wrote to memory of 2764	2528	New Order xls.exe	31
PID 2528 wrote to memory of 2836	2528	New Order xls.exe	33
PID 2528 wrote to memory of 2836	2528	New Order xls.exe	33
PID 2528 wrote to memory of 2836	2528	New Order xls.exe	33
PID 2528 wrote to memory of 2836	2528	New Order xls.exe	33
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35
PID 2528 wrote to memory of 2908	2528	New Order xls.exe	35

C:\Users\Admin\AppData\Local\Temp\New Order xls.exe
"C:\Users\Admin\AppData\Local\Temp\New Order xls.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\YNAkZvWkctLEXT.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2764
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YNAkZvWkctLEXT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6DC1.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2836
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

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

C:\Users\Admin\AppData\Local\Temp\tmp6DC1.tmp

Filesize
1KB

MD5
4a40740b517c575ccd38e7c88f829695

SHA1
535730d9950c33cc3997adecaadb1517b5fc37bc

SHA256
662fb478882a1e82b87a8d62418a05e14b33f6f633fa54824bc81e2a4ad7de78

SHA512
d9a09eee3c257d55f68f5402a47a1ad8abb8bd01d43934edd43492e6016c99c7382bb6f793db85ea80bd716f9bbede89279db883c960534e22bb50b948108d8c

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
144B

MD5
bd9501c1a8dc220797ea94790342a63d

SHA1
95c978549da65224a3d3bd46862640105711f99e

SHA256
9e3790c4cc904b95067f8935518dd7356914472bcc82f3a2bcf4fb96ea0b9146

SHA512
597ce57853458542d921cdcb75b984ac6dbea2a9323fcbee01fbd1d1439edf0a17c27393bb7892574ce88c894f55a3fe61ffb78f58706dfee27565ea32b9e5e0

Download Submit
memory/2528-0-0x000000007402E000-0x000000007402F000-memory.dmp

Filesize
4KB

Download
memory/2528-1-0x00000000013D0000-0x00000000014F8000-memory.dmp

Filesize
1.2MB

Download
memory/2528-2-0x0000000074020000-0x000000007470E000-memory.dmp

Filesize
6.9MB

Download
memory/2528-3-0x00000000009D0000-0x00000000009DE000-memory.dmp

Filesize
56KB

Download
memory/2528-4-0x0000000074020000-0x000000007470E000-memory.dmp

Filesize
6.9MB

Download
memory/2528-5-0x000000007402E000-0x000000007402F000-memory.dmp

Filesize
4KB

Download
memory/2528-6-0x0000000074020000-0x000000007470E000-memory.dmp

Filesize
6.9MB

Download
memory/2528-7-0x00000000055A0000-0x00000000056AC000-memory.dmp

Filesize
1.0MB

Download
memory/2528-38-0x0000000074020000-0x000000007470E000-memory.dmp

Filesize
6.9MB

Download
memory/2908-34-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-37-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-32-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-31-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2908-29-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-27-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-25-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-23-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-21-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-19-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-17-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-33-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/2908-15-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads