remcos | 43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21/10/2024, 10:36

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General

Target

43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe
Size

852KB
MD5

2aa3e6891a29471057d6757b4ae7be70
SHA1

45e6bd7f8578facc1391877744a5bd18723d5b30
SHA256

43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36
SHA512

299fb4ba25b370d3abe017f773ee0c30a98d78d9b87078baa83a04aefc1b6b390876e2cf16f5eda4a2ed378d394d685dbcde2057d4d0f7e15d886f78ffe9bd4f
SSDEEP

24576:c7bmguo9DkXFCkTqVrkFlfEbNzDe6Vryr:kb+8DIhp8NRyr

Score

10^/10

remcos sep 26 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

SEP 26

zaid.zapto.org:9373

103.186.117.97:5584

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
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-W2KFKR
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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4596	powershell.exe
5076	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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3176 set thread context of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103

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 5 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
896	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5076	powershell.exe
5076	powershell.exe
4596	powershell.exe
4596	powershell.exe
4596	powershell.exe
5076	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4596	powershell.exe
Token: SeDebugPrivilege	5076	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2880	MSBuild.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3176 wrote to memory of 4596	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	97
PID 3176 wrote to memory of 4596	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	97
PID 3176 wrote to memory of 4596	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	97
PID 3176 wrote to memory of 5076	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	99
PID 3176 wrote to memory of 5076	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	99
PID 3176 wrote to memory of 5076	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	99
PID 3176 wrote to memory of 896	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	101
PID 3176 wrote to memory of 896	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	101
PID 3176 wrote to memory of 896	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	101
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103
PID 3176 wrote to memory of 2880	3176	43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe	103

C:\Users\Admin\AppData\Local\Temp\43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe
"C:\Users\Admin\AppData\Local\Temp\43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3176
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\43cb1f81a50bfc91ff025a0c0ddfc9d9dc14dca28bbf966cd3240162fc1eeb36.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4596
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\jemWTfPfjK.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5076
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jemWTfPfjK" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCCC6.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:896
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2880

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
46b3218434078a8acd0e14410efbfe15

SHA1
42992d2a6857a432faf6cdb2e035bdbf34123354

SHA256
a5177a0981d8ca76dcbca1d5e0a7f99cff3da24690f4c81ad0ce674721c8eb54

SHA512
c2a64cf4eb66ebf96210953a373058563e28389951e80cb0d13b4e3837f65c1cc11923debc1f89b3e421041251a72b43e1b2755d32d615f1ecbfc864d25bd7f3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_z5irv2xf.chy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCCC6.tmp

Filesize
1KB

MD5
15e7db0a0c6d56ce748fb2d4017deb48

SHA1
8ae220be29c8dac20f116124c3ee2c6740f12ee6

SHA256
be78ab28124ac4e3101fb5318b9dff57e2d652a3a1597e41e888b2c15e95459e

SHA512
3f34c3f05257de96abc93158ebf5c511c73cba7549334199ce473e290177210e5371c03135370cc0f2e054bcf938bd6fcf3e386b0a39ffe139cc9fff33483121

Download Submit
memory/2880-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-93-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-121-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-120-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-112-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-113-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2880-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3176-7-0x0000000005540000-0x0000000005552000-memory.dmp

Filesize
72KB

Download
memory/3176-0-0x000000007529E000-0x000000007529F000-memory.dmp

Filesize
4KB

Download
memory/3176-10-0x0000000006590000-0x000000000664E000-memory.dmp

Filesize
760KB

Download
memory/3176-9-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/3176-8-0x000000007529E000-0x000000007529F000-memory.dmp

Filesize
4KB

Download
memory/3176-54-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/3176-6-0x0000000005290000-0x000000000532C000-memory.dmp

Filesize
624KB

Download
memory/3176-5-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/3176-4-0x00000000051E0000-0x00000000051EA000-memory.dmp

Filesize
40KB

Download
memory/3176-3-0x0000000005040000-0x00000000050D2000-memory.dmp

Filesize
584KB

Download
memory/3176-2-0x0000000005550000-0x0000000005AF4000-memory.dmp

Filesize
5.6MB

Download
memory/3176-1-0x0000000000560000-0x000000000063C000-memory.dmp

Filesize
880KB

Download
memory/4596-18-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/4596-86-0x0000000007150000-0x000000000716A000-memory.dmp

Filesize
104KB

Download
memory/4596-55-0x0000000006080000-0x00000000060CC000-memory.dmp

Filesize
304KB

Download
memory/4596-57-0x000000006FCB0000-0x000000006FCFC000-memory.dmp

Filesize
304KB

Download
memory/4596-67-0x0000000006050000-0x000000000606E000-memory.dmp

Filesize
120KB

Download
memory/4596-56-0x0000000006C80000-0x0000000006CB2000-memory.dmp

Filesize
200KB

Download
memory/4596-68-0x0000000006CC0000-0x0000000006D63000-memory.dmp

Filesize
652KB

Download
memory/4596-15-0x0000000002200000-0x0000000002236000-memory.dmp

Filesize
216KB

Download
memory/4596-79-0x0000000007450000-0x0000000007ACA000-memory.dmp

Filesize
6.5MB

Download
memory/4596-80-0x0000000006E10000-0x0000000006E2A000-memory.dmp

Filesize
104KB

Download
memory/4596-81-0x0000000006E80000-0x0000000006E8A000-memory.dmp

Filesize
40KB

Download
memory/4596-16-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/4596-83-0x0000000007010000-0x0000000007021000-memory.dmp

Filesize
68KB

Download
memory/4596-17-0x0000000004D70000-0x0000000005398000-memory.dmp

Filesize
6.2MB

Download
memory/4596-85-0x0000000007050000-0x0000000007064000-memory.dmp

Filesize
80KB

Download
memory/4596-53-0x0000000005AD0000-0x0000000005AEE000-memory.dmp

Filesize
120KB

Download
memory/4596-19-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/4596-24-0x0000000005480000-0x00000000054E6000-memory.dmp

Filesize
408KB

Download
memory/4596-91-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/4596-40-0x00000000054F0000-0x0000000005844000-memory.dmp

Filesize
3.3MB

Download
memory/4596-22-0x0000000004D20000-0x0000000004D42000-memory.dmp

Filesize
136KB

Download
memory/4596-23-0x0000000005410000-0x0000000005476000-memory.dmp

Filesize
408KB

Download
memory/5076-90-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/5076-21-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/5076-20-0x0000000075290000-0x0000000075A40000-memory.dmp

Filesize
7.7MB

Download
memory/5076-87-0x0000000007E50000-0x0000000007E58000-memory.dmp

Filesize
32KB

Download
memory/5076-84-0x0000000007D60000-0x0000000007D6E000-memory.dmp

Filesize
56KB

Download
memory/5076-82-0x0000000007DB0000-0x0000000007E46000-memory.dmp

Filesize
600KB

Download
memory/5076-69-0x000000006FCB0000-0x000000006FCFC000-memory.dmp

Filesize
304KB

Download