remcos | 3c0f9981e85d84d77fbba8ee32632a07c6fcee5ec7570a7d1b854f02ed3374d4

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
25-09-2024 08:30

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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
2572	powershell.exe
2580	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2288 set thread context of 2904	2288	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	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
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
2612	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2288	PO_33948576383mth_pdf.exe
2572	powershell.exe
2580	powershell.exe
2288	PO_33948576383mth_pdf.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2288	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	2580	powershell.exe
Token: SeDebugPrivilege	2572	powershell.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 2572	2288	PO_33948576383mth_pdf.exe	30
PID 2288 wrote to memory of 2572	2288	PO_33948576383mth_pdf.exe	30
PID 2288 wrote to memory of 2572	2288	PO_33948576383mth_pdf.exe	30
PID 2288 wrote to memory of 2572	2288	PO_33948576383mth_pdf.exe	30
PID 2288 wrote to memory of 2580	2288	PO_33948576383mth_pdf.exe	32
PID 2288 wrote to memory of 2580	2288	PO_33948576383mth_pdf.exe	32
PID 2288 wrote to memory of 2580	2288	PO_33948576383mth_pdf.exe	32
PID 2288 wrote to memory of 2580	2288	PO_33948576383mth_pdf.exe	32
PID 2288 wrote to memory of 2612	2288	PO_33948576383mth_pdf.exe	34
PID 2288 wrote to memory of 2612	2288	PO_33948576383mth_pdf.exe	34
PID 2288 wrote to memory of 2612	2288	PO_33948576383mth_pdf.exe	34
PID 2288 wrote to memory of 2612	2288	PO_33948576383mth_pdf.exe	34
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	PO_33948576383mth_pdf.exe	36
PID 2288 wrote to memory of 2904	2288	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:2288
- 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:2572
- 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:2580
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1738.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2612
- 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:2904

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\tmp1738.tmp

Filesize
1KB

MD5
b0399ce9a761f204101c9b6ce1883f89

SHA1
68d1c8dedd7322f99229ce38ad60658845551bce

SHA256
86e6b7510302ffb09ba0d8357e5192532b8d9dc587012839f409753936274725

SHA512
6c2f7f82964721525244e4498331408fa4e5a0f722944325895cc3e79b1eb9c51b30ecefc86a2ce20b3acdaa0349c90560f560bd1fb786a1bd2031993515f493

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
17c723e452c6dff9ba76962367c1c5be

SHA1
25d3d64529fbb0afd3730ea44dd6f017b048df43

SHA256
ec3f9530730114b464f6cdad44342a2344dec2e336d65b2a65c5d275d70b2e32

SHA512
37ccefcced69b40a86fecbc1b5d450d9e0e68dce6da35cc6d2e01c18912e9436e2d8646b2cec7b959fde62a882d0ff6739adcee6ad9f96a898354e0e105136a4

Download Submit
memory/2288-0-0x000000007470E000-0x000000007470F000-memory.dmp

Filesize
4KB

Download
memory/2288-1-0x0000000000220000-0x0000000000304000-memory.dmp

Filesize
912KB

Download
memory/2288-2-0x0000000074700000-0x0000000074DEE000-memory.dmp

Filesize
6.9MB

Download
memory/2288-3-0x0000000000450000-0x0000000000462000-memory.dmp

Filesize
72KB

Download
memory/2288-4-0x000000007470E000-0x000000007470F000-memory.dmp

Filesize
4KB

Download
memory/2288-5-0x0000000074700000-0x0000000074DEE000-memory.dmp

Filesize
6.9MB

Download
memory/2288-6-0x0000000005210000-0x00000000052CE000-memory.dmp

Filesize
760KB

Download
memory/2288-40-0x0000000074700000-0x0000000074DEE000-memory.dmp

Filesize
6.9MB

Download
memory/2904-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2904-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2904-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download