remcos | fd9c0fb6f463cee4975445c4ff19301daeed95a081f0428c5ef7aad815dd7277

Resubmissions

05-09-2024 11:59

240905-n58yzs1clh 10

05-09-2024 11:59

240905-n53rzazern 3

05-09-2024 11:35

240905-np5lmazcnm 10

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-09-2024 11:35

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General

Target

HSBC Payment Advice_pdf.exe
Size

993KB
MD5

d0da590b7edbc0da19fb22989e74094a
SHA1

96ebe02b6e7499acdf741aa1a770511345532cf3
SHA256

fd9c0fb6f463cee4975445c4ff19301daeed95a081f0428c5ef7aad815dd7277
SHA512

6f7547230d5e005b6a9f04db0cb0c64c501dacf6f4836b1061f6dc2135ab8a06f06a1c5d7f90bd87491b534e4bfc20068d498b55bf896d63058ec8035df03a9b
SSDEEP

24576:SUobyDHF8HpzkLmV4ZDeLnmx/E/oLZT2nGr4oI6:DZKJILmVmeKx8gZlI

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
4676	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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	HSBC Payment Advice_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5084 set thread context of 532	5084	HSBC Payment Advice_pdf.exe	97

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	HSBC Payment Advice_pdf.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	HSBC Payment Advice_pdf.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
3368	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5084	HSBC Payment Advice_pdf.exe
5084	HSBC Payment Advice_pdf.exe
4676	powershell.exe
4676	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5084	HSBC Payment Advice_pdf.exe
Token: SeDebugPrivilege	4676	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
532	HSBC Payment Advice_pdf.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
532	HSBC Payment Advice_pdf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
532	HSBC Payment Advice_pdf.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 4676	5084	HSBC Payment Advice_pdf.exe	93
PID 5084 wrote to memory of 4676	5084	HSBC Payment Advice_pdf.exe	93
PID 5084 wrote to memory of 4676	5084	HSBC Payment Advice_pdf.exe	93
PID 5084 wrote to memory of 3368	5084	HSBC Payment Advice_pdf.exe	95
PID 5084 wrote to memory of 3368	5084	HSBC Payment Advice_pdf.exe	95
PID 5084 wrote to memory of 3368	5084	HSBC Payment Advice_pdf.exe	95
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97
PID 5084 wrote to memory of 532	5084	HSBC Payment Advice_pdf.exe	97

C:\Users\Admin\AppData\Local\Temp\HSBC Payment Advice_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\HSBC Payment Advice_pdf.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:5084
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\FuWEVfUSU.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4676
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\FuWEVfUSU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBA76.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3368
- C:\Users\Admin\AppData\Local\Temp\HSBC Payment Advice_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\HSBC Payment Advice_pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:532

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
236B

MD5
b181b4625e116330159f5504e331e1c0

SHA1
aa8abce5b5a0ef660def63d66c04bd4e1da3ffad

SHA256
0bd71181e358719a71d89b10ab906e77354cf34a949f7a3bb8bcbe094574d551

SHA512
767afe7dc5d66898ca8b9f6a1550028fbe95bf31182db749b2046d6499edc5c1e247f45743f7eb9c38d7a02f6a4cc27aca33854a37317663caa32e8b5eea75d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1mbya20u.cl3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBA76.tmp

Filesize
1KB

MD5
75526ced7ce0bc04aca8f6e67af4f285

SHA1
4bf9e0294afa002295d3a76f53fb6e36b765f2f4

SHA256
f5afa1c0e064edf36bd48e4e157c7ef3275fc21f19d805c99fef15b9c47971d4

SHA512
e34c0e60d98f9ad2e9007f2e1f65f0f23a0e6754541981c7f3d3cb70722da79788a3c41f3e48370e39a7455d061076ac0e1fb1e55b0c33d004b75e3500ecc86e

Download Submit
memory/532-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-109-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-110-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/532-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4676-45-0x0000000006580000-0x000000000659E000-memory.dmp

Filesize
120KB

Download
memory/4676-66-0x0000000007AE0000-0x0000000007AEE000-memory.dmp

Filesize
56KB

Download
memory/4676-34-0x0000000005FB0000-0x0000000006304000-memory.dmp

Filesize
3.3MB

Download
memory/4676-15-0x0000000004FD0000-0x0000000005006000-memory.dmp

Filesize
216KB

Download
memory/4676-28-0x0000000005F40000-0x0000000005FA6000-memory.dmp

Filesize
408KB

Download
memory/4676-26-0x00000000055B0000-0x00000000055D2000-memory.dmp

Filesize
136KB

Download
memory/4676-22-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4676-74-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4676-46-0x0000000006630000-0x000000000667C000-memory.dmp

Filesize
304KB

Download
memory/4676-19-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/4676-48-0x0000000007570000-0x00000000075A2000-memory.dmp

Filesize
200KB

Download
memory/4676-49-0x0000000071480000-0x00000000714CC000-memory.dmp

Filesize
304KB

Download
memory/4676-59-0x0000000006B50000-0x0000000006B6E000-memory.dmp

Filesize
120KB

Download
memory/4676-60-0x00000000075B0000-0x0000000007653000-memory.dmp

Filesize
652KB

Download
memory/4676-61-0x0000000007EF0000-0x000000000856A000-memory.dmp

Filesize
6.5MB

Download
memory/4676-62-0x00000000078B0000-0x00000000078CA000-memory.dmp

Filesize
104KB

Download
memory/4676-63-0x0000000007920000-0x000000000792A000-memory.dmp

Filesize
40KB

Download
memory/4676-64-0x0000000007B30000-0x0000000007BC6000-memory.dmp

Filesize
600KB

Download
memory/4676-65-0x0000000007AB0000-0x0000000007AC1000-memory.dmp

Filesize
68KB

Download
memory/4676-27-0x0000000005DD0000-0x0000000005E36000-memory.dmp

Filesize
408KB

Download
memory/4676-67-0x0000000007AF0000-0x0000000007B04000-memory.dmp

Filesize
80KB

Download
memory/4676-68-0x0000000007BF0000-0x0000000007C0A000-memory.dmp

Filesize
104KB

Download
memory/4676-69-0x0000000007BD0000-0x0000000007BD8000-memory.dmp

Filesize
32KB

Download
memory/4676-18-0x00000000057A0000-0x0000000005DC8000-memory.dmp

Filesize
6.2MB

Download
memory/4676-16-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/5084-0-0x0000000074F3E000-0x0000000074F3F000-memory.dmp

Filesize
4KB

Download
memory/5084-39-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/5084-10-0x0000000006C20000-0x0000000006CE0000-memory.dmp

Filesize
768KB

Download
memory/5084-9-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/5084-8-0x0000000074F3E000-0x0000000074F3F000-memory.dmp

Filesize
4KB

Download
memory/5084-7-0x0000000005BF0000-0x0000000005C08000-memory.dmp

Filesize
96KB

Download
memory/5084-6-0x0000000005C60000-0x0000000005CFC000-memory.dmp

Filesize
624KB

Download
memory/5084-5-0x00000000058F0000-0x00000000058FA000-memory.dmp

Filesize
40KB

Download
memory/5084-4-0x0000000074F30000-0x00000000756E0000-memory.dmp

Filesize
7.7MB

Download
memory/5084-3-0x0000000005960000-0x00000000059F2000-memory.dmp

Filesize
584KB

Download
memory/5084-2-0x0000000005E70000-0x0000000006414000-memory.dmp

Filesize
5.6MB

Download
memory/5084-1-0x0000000000F80000-0x000000000107E000-memory.dmp

Filesize
1016KB

Download