remcos | 1f60d73df0c649c1473f8510d75eb83bee9826773f3e920ba3f290d71675faed

Analysis

max time kernel
148s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-09-2024 14:37

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General

Target

PO_33948576383mth_pdf.exe
Size

889KB
MD5

f0689dfa240f533acc8079bcbff064e8
SHA1

b4f9d193d9ff8f0302af25212dffc67292fb752c
SHA256

993f261bd20b55d4a58dc129e2ef3d70ef23a7999e2d6b27d4eca2eb8b57e933
SHA512

12dcb5d05a8811ca7070a98acd844117097849044031920559d7043059d803effb54fe6f0cd0b579e899c964439f9929db6c00afbd6616cf2e949ab2df9c40b4
SSDEEP

24576:EnHNRRr5sff/UYS2DzidV2P6ktb8amzIoI:EnHNRRr5Q0YS2ydwR8TI

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

127.0.0.1:59321

nnamoo.duckdns.org:59321

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-41EVS0
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
2768	powershell.exe
2852	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2188 set thread context of 3032	2188	PO_33948576383mth_pdf.exe	36

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	powershell.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO_33948576383mth_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
896	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2188	PO_33948576383mth_pdf.exe
2188	PO_33948576383mth_pdf.exe
2852	powershell.exe
2768	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	2852	powershell.exe
Token: SeDebugPrivilege	2768	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 2768	2188	PO_33948576383mth_pdf.exe	30
PID 2188 wrote to memory of 2768	2188	PO_33948576383mth_pdf.exe	30
PID 2188 wrote to memory of 2768	2188	PO_33948576383mth_pdf.exe	30
PID 2188 wrote to memory of 2768	2188	PO_33948576383mth_pdf.exe	30
PID 2188 wrote to memory of 2852	2188	PO_33948576383mth_pdf.exe	32
PID 2188 wrote to memory of 2852	2188	PO_33948576383mth_pdf.exe	32
PID 2188 wrote to memory of 2852	2188	PO_33948576383mth_pdf.exe	32
PID 2188 wrote to memory of 2852	2188	PO_33948576383mth_pdf.exe	32
PID 2188 wrote to memory of 896	2188	PO_33948576383mth_pdf.exe	33
PID 2188 wrote to memory of 896	2188	PO_33948576383mth_pdf.exe	33
PID 2188 wrote to memory of 896	2188	PO_33948576383mth_pdf.exe	33
PID 2188 wrote to memory of 896	2188	PO_33948576383mth_pdf.exe	33
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36
PID 2188 wrote to memory of 3032	2188	PO_33948576383mth_pdf.exe	36

C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2188
- 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\PO_33948576383mth_pdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2768
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WZiSWBRtQ.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2852
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp24C0.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:896
- 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
  PID:3032

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

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\tmp24C0.tmp

Filesize
1KB

MD5
eea8816996ba8850b597709408c68b98

SHA1
fa0e771150d9c8678db16892e67a9af5a25449a7

SHA256
a84633d37d7707b803c23cbdde85f7240509eddb061af37fc1f98638a0009f53

SHA512
9793d5ed53fd1061bf7dbc6e7f69083385f5aae0ad83171fe602be97d4af605371434c27d0bf257eb88b09d826446ccc1fbc2c4602ebd5e9fb1b1553a7667ed7

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\94Z1EF027CIACBSOET6N.temp

Filesize
7KB

MD5
da5bd71dfbd5a7d281dc0267c66f150a

SHA1
df9594a839f6984a02089da3c43147b400d2b8f6

SHA256
2e119d902aa493885239c86cbb8614423ce353731a1d00d6fc37f74e3a0b45e0

SHA512
09a7b75e5ff404340fde7ef19bbbdf088366fff6988f1471f1f09ced4e7d0cf80d0101cfbb890c2dfdf65a37a4fce578c6c32c823f2115fb90be093aa52da3a9

Download Submit
memory/2188-0-0x0000000073D3E000-0x0000000073D3F000-memory.dmp

Filesize
4KB

Download
memory/2188-1-0x00000000008A0000-0x0000000000984000-memory.dmp

Filesize
912KB

Download
memory/2188-2-0x0000000073D30000-0x000000007441E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-3-0x00000000003E0000-0x00000000003F2000-memory.dmp

Filesize
72KB

Download
memory/2188-4-0x0000000073D3E000-0x0000000073D3F000-memory.dmp

Filesize
4KB

Download
memory/2188-5-0x0000000073D30000-0x000000007441E000-memory.dmp

Filesize
6.9MB

Download
memory/2188-6-0x0000000005540000-0x00000000055FE000-memory.dmp

Filesize
760KB

Download
memory/2188-40-0x0000000073D30000-0x000000007441E000-memory.dmp

Filesize
6.9MB

Download
memory/3032-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3032-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3032-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download