remcos | dd8fd3744ffb504accf45d587a8a7ff3c7751ff36dc24f84469d98a8c186e50e

Analysis

max time kernel
148s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2024 01:48

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General

Target

fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
Size

1.0MB
MD5

f8c03f656b356b3477ea05d7427bce3e
SHA1

b20be63658060f9356e90e7846c2091069950682
SHA256

fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5
SHA512

35df2187b512fe1908aae5159741e3d666e078fc0e4bbba17c693fdfffab810f8abaf4fe622de3d5a1c32e70db097c0608bc4b9b7723282cd635638971d888d6
SSDEEP

24576:nIUobyTkpVyd+8OuyBNtpFgX9AB5NHY0hBMfUzvB0JERhM1:d96o7OuyBTqCNHY0r50e41

Score

10^/10

remcos udu discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

udu

UDUM.WORK.GD:2431

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
vlc
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
sos
mouse_option
false
mutex
udm-2WYU92
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1968	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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 824 set thread context of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99

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	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.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	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.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
760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
1968	powershell.exe
824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
1968	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
Token: SeDebugPrivilege	1968	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4976	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4976	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4976	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 824 wrote to memory of 1968	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	93
PID 824 wrote to memory of 1968	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	93
PID 824 wrote to memory of 1968	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	93
PID 824 wrote to memory of 760	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	95
PID 824 wrote to memory of 760	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	95
PID 824 wrote to memory of 760	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	95
PID 824 wrote to memory of 3668	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	97
PID 824 wrote to memory of 3668	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	97
PID 824 wrote to memory of 3668	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	97
PID 824 wrote to memory of 4280	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	98
PID 824 wrote to memory of 4280	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	98
PID 824 wrote to memory of 4280	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	98
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99
PID 824 wrote to memory of 4976	824	fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe	99

C:\Users\Admin\AppData\Local\Temp\fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
"C:\Users\Admin\AppData\Local\Temp\fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.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:824
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\UvwokF.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1968
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UvwokF" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE9F2.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:760
- C:\Users\Admin\AppData\Local\Temp\fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
  "C:\Users\Admin\AppData\Local\Temp\fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe"
  2⤵
  PID:3668
- C:\Users\Admin\AppData\Local\Temp\fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
  "C:\Users\Admin\AppData\Local\Temp\fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe"
  2⤵
  PID:4280
- C:\Users\Admin\AppData\Local\Temp\fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe
  "C:\Users\Admin\AppData\Local\Temp\fd289f86941e426b8116ead4b68649fac1dc3fc5611da26af9a446f911b30ea5.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:4976

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

Loading Replay Monitor...

Downloads

C:\ProgramData\sos\logs.dat

Filesize
318B

MD5
73058c3103da29027d742a417fa6de3f

SHA1
826d4238347200f5c1764b9140a422fee0df3290

SHA256
d96c49a8e27ca3b75b3c6956c839893df01a8776259d88626e2a3d05f1d75642

SHA512
7c68377a64b10a4f0273ad04e29a5a0a30fbb4c23503c5e25f60be141e2c21c6da39fb011046df2b88c245253c6d9295ff6fff09e18d0b7785b65c45ef9a6203

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_j23wvscl.yez.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE9F2.tmp

Filesize
1KB

MD5
7644e5dec3f0f1fb905454b46e73f48a

SHA1
0ed1c185b32dcc3b0e838aecee6d37f5e12fff4e

SHA256
20a0245be221dd93ff1debb07057a1a1a08afa6db5cf5f7c4e71c9e8f7f72659

SHA512
16b65ef5e9ae34cfcf6cc2a01f172d14d1db53f92d8da7f539a90c7e119527909c16808353d389897c9f9f651764644f5d87b908a413772878d70484cd24e9d5

Download Submit
memory/824-6-0x0000000005750000-0x0000000005768000-memory.dmp

Filesize
96KB

Download
memory/824-4-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/824-5-0x0000000005710000-0x000000000571A000-memory.dmp

Filesize
40KB

Download
memory/824-3-0x0000000005780000-0x0000000005812000-memory.dmp

Filesize
584KB

Download
memory/824-7-0x0000000074B3E000-0x0000000074B3F000-memory.dmp

Filesize
4KB

Download
memory/824-8-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/824-9-0x0000000005B60000-0x0000000005C20000-memory.dmp

Filesize
768KB

Download
memory/824-10-0x0000000008770000-0x000000000880C000-memory.dmp

Filesize
624KB

Download
memory/824-2-0x0000000005D30000-0x00000000062D4000-memory.dmp

Filesize
5.6MB

Download
memory/824-1-0x0000000000C10000-0x0000000000D1E000-memory.dmp

Filesize
1.1MB

Download
memory/824-0-0x0000000074B3E000-0x0000000074B3F000-memory.dmp

Filesize
4KB

Download
memory/824-41-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/1968-69-0x0000000007540000-0x0000000007548000-memory.dmp

Filesize
32KB

Download
memory/1968-62-0x0000000007290000-0x000000000729A000-memory.dmp

Filesize
40KB

Download
memory/1968-21-0x0000000005770000-0x00000000057D6000-memory.dmp

Filesize
408KB

Download
memory/1968-29-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/1968-19-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/1968-22-0x00000000057E0000-0x0000000005846000-memory.dmp

Filesize
408KB

Download
memory/1968-30-0x00000000059B0000-0x0000000005D04000-memory.dmp

Filesize
3.3MB

Download
memory/1968-15-0x0000000004920000-0x0000000004956000-memory.dmp

Filesize
216KB

Download
memory/1968-72-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/1968-17-0x00000000050D0000-0x00000000056F8000-memory.dmp

Filesize
6.2MB

Download
memory/1968-68-0x0000000007560000-0x000000000757A000-memory.dmp

Filesize
104KB

Download
memory/1968-39-0x0000000005F00000-0x0000000005F1E000-memory.dmp

Filesize
120KB

Download
memory/1968-16-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/1968-40-0x0000000005F20000-0x0000000005F6C000-memory.dmp

Filesize
304KB

Download
memory/1968-67-0x0000000007460000-0x0000000007474000-memory.dmp

Filesize
80KB

Download
memory/1968-66-0x0000000007450000-0x000000000745E000-memory.dmp

Filesize
56KB

Download
memory/1968-65-0x0000000007420000-0x0000000007431000-memory.dmp

Filesize
68KB

Download
memory/1968-58-0x00000000064B0000-0x00000000064CE000-memory.dmp

Filesize
120KB

Download
memory/1968-59-0x0000000007140000-0x00000000071E3000-memory.dmp

Filesize
652KB

Download
memory/1968-48-0x000000006F7E0000-0x000000006F82C000-memory.dmp

Filesize
304KB

Download
memory/1968-47-0x0000000007100000-0x0000000007132000-memory.dmp

Filesize
200KB

Download
memory/1968-60-0x0000000007870000-0x0000000007EEA000-memory.dmp

Filesize
6.5MB

Download
memory/1968-61-0x0000000007220000-0x000000000723A000-memory.dmp

Filesize
104KB

Download
memory/1968-20-0x0000000004F60000-0x0000000004F82000-memory.dmp

Filesize
136KB

Download
memory/1968-63-0x00000000074A0000-0x0000000007536000-memory.dmp

Filesize
600KB

Download
memory/4976-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-91-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-97-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-98-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-104-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-105-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-110-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4976-111-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download