remcos | 437cb3ec242f9cfb0c579d68d192c034d54b8c7d976eecb6c48d0535d12308ba

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-12-2024 07:06

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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

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
4976	powershell.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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	New Order xls.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4024 set thread context of 3996	4024	New Order xls.exe	105

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	RegSvcs.exe
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

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
1532	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4024	New Order xls.exe
4024	New Order xls.exe
4024	New Order xls.exe
4976	powershell.exe
4976	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4024	New Order xls.exe
Token: SeDebugPrivilege	4976	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3996	RegSvcs.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4024 wrote to memory of 4976	4024	New Order xls.exe	101
PID 4024 wrote to memory of 4976	4024	New Order xls.exe	101
PID 4024 wrote to memory of 4976	4024	New Order xls.exe	101
PID 4024 wrote to memory of 1532	4024	New Order xls.exe	103
PID 4024 wrote to memory of 1532	4024	New Order xls.exe	103
PID 4024 wrote to memory of 1532	4024	New Order xls.exe	103
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105
PID 4024 wrote to memory of 3996	4024	New Order xls.exe	105

C:\Users\Admin\AppData\Local\Temp\New Order xls.exe
"C:\Users\Admin\AppData\Local\Temp\New Order xls.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4024
- 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:4976
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YNAkZvWkctLEXT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp23BF.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1532
- 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:3996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hhzki21q.2qy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp23BF.tmp

Filesize
1KB

MD5
75dd03609f6d1619b05918fc3ee0a743

SHA1
98be256953f132a7cf3b665b14e24c80cc1a0dd6

SHA256
dc70b565c82fa37360c1169e343267a26befad666e90f749fe34bc4a42d98294

SHA512
a845ed4d4c55ce1045c5162cd3d8907ec089b9b9eefa8ba351704f48db8e12239359658ff4f1e23253dfaff0c630ea0e3c78fed353c412b6f8ec98b556c8685f

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

Filesize
144B

MD5
002bd5e91a77a483c030ee865b742ff3

SHA1
d3643fb657a4637e2c3cabbfda8ab12a12b3d207

SHA256
7bc64e099e2151215df424c362324a99759d060430265db01cd16ac4acbcae3e

SHA512
1f49d06be85cb3adec1511168cb1e8da9dba7d683fdfc900aea53e0dff7d4ea3ee3cd7d025be0c3f19f350e7695b1fca084f4b3ec6fa59c324f0cd8548966457

Download Submit
memory/3996-24-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/3996-33-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/3996-27-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/3996-21-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/3996-23-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/3996-22-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/3996-74-0x0000000000400000-0x000000000047B000-memory.dmp

Filesize
492KB

Download
memory/4024-5-0x00000000050C0000-0x00000000050CA000-memory.dmp

Filesize
40KB

Download
memory/4024-11-0x0000000006D40000-0x0000000006E4C000-memory.dmp

Filesize
1.0MB

Download
memory/4024-10-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4024-9-0x000000007513E000-0x000000007513F000-memory.dmp

Filesize
4KB

Download
memory/4024-8-0x00000000065B0000-0x00000000065BE000-memory.dmp

Filesize
56KB

Download
memory/4024-7-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4024-6-0x00000000065C0000-0x000000000665C000-memory.dmp

Filesize
624KB

Download
memory/4024-0-0x000000007513E000-0x000000007513F000-memory.dmp

Filesize
4KB

Download
memory/4024-4-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4024-3-0x0000000005100000-0x0000000005192000-memory.dmp

Filesize
584KB

Download
memory/4024-2-0x0000000005610000-0x0000000005BB4000-memory.dmp

Filesize
5.6MB

Download
memory/4024-35-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4024-1-0x00000000006D0000-0x00000000007F8000-memory.dmp

Filesize
1.2MB

Download
memory/4976-30-0x0000000005370000-0x00000000053D6000-memory.dmp

Filesize
408KB

Download
memory/4976-60-0x00000000073D0000-0x0000000007A4A000-memory.dmp

Filesize
6.5MB

Download
memory/4976-29-0x0000000004A40000-0x0000000004AA6000-memory.dmp

Filesize
408KB

Download
memory/4976-28-0x00000000049A0000-0x00000000049C2000-memory.dmp

Filesize
136KB

Download
memory/4976-45-0x0000000005A60000-0x0000000005A7E000-memory.dmp

Filesize
120KB

Download
memory/4976-46-0x0000000005B20000-0x0000000005B6C000-memory.dmp

Filesize
304KB

Download
memory/4976-34-0x00000000054E0000-0x0000000005834000-memory.dmp

Filesize
3.3MB

Download
memory/4976-20-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4976-19-0x0000000004C40000-0x0000000005268000-memory.dmp

Filesize
6.2MB

Download
memory/4976-47-0x0000000006030000-0x0000000006062000-memory.dmp

Filesize
200KB

Download
memory/4976-48-0x0000000071920000-0x000000007196C000-memory.dmp

Filesize
304KB

Download
memory/4976-58-0x0000000006010000-0x000000000602E000-memory.dmp

Filesize
120KB

Download
memory/4976-59-0x0000000006C30000-0x0000000006CD3000-memory.dmp

Filesize
652KB

Download
memory/4976-32-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4976-61-0x0000000006D80000-0x0000000006D9A000-memory.dmp

Filesize
104KB

Download
memory/4976-62-0x0000000006E00000-0x0000000006E0A000-memory.dmp

Filesize
40KB

Download
memory/4976-63-0x0000000007000000-0x0000000007096000-memory.dmp

Filesize
600KB

Download
memory/4976-64-0x0000000006F80000-0x0000000006F91000-memory.dmp

Filesize
68KB

Download
memory/4976-65-0x0000000006FB0000-0x0000000006FBE000-memory.dmp

Filesize
56KB

Download
memory/4976-66-0x0000000006FC0000-0x0000000006FD4000-memory.dmp

Filesize
80KB

Download
memory/4976-68-0x00000000070C0000-0x00000000070DA000-memory.dmp

Filesize
104KB

Download
memory/4976-69-0x00000000070A0000-0x00000000070A8000-memory.dmp

Filesize
32KB

Download
memory/4976-72-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4976-17-0x0000000075130000-0x00000000758E0000-memory.dmp

Filesize
7.7MB

Download
memory/4976-16-0x00000000044B0000-0x00000000044E6000-memory.dmp

Filesize
216KB

Download