remcos | 1f60d73df0c649c1473f8510d75eb83bee9826773f3e920ba3f290d71675faed

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
25-09-2024 06:46

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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
3640	powershell.exe
4632	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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	PO_33948576383mth_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2572 set thread context of 1392	2572	PO_33948576383mth_pdf.exe	93

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
2232	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2572	PO_33948576383mth_pdf.exe
3640	powershell.exe
2572	PO_33948576383mth_pdf.exe
4632	powershell.exe
3640	powershell.exe
4632	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2572	PO_33948576383mth_pdf.exe
Token: SeDebugPrivilege	3640	powershell.exe
Token: SeDebugPrivilege	4632	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2572 wrote to memory of 3640	2572	PO_33948576383mth_pdf.exe	87
PID 2572 wrote to memory of 3640	2572	PO_33948576383mth_pdf.exe	87
PID 2572 wrote to memory of 3640	2572	PO_33948576383mth_pdf.exe	87
PID 2572 wrote to memory of 4632	2572	PO_33948576383mth_pdf.exe	89
PID 2572 wrote to memory of 4632	2572	PO_33948576383mth_pdf.exe	89
PID 2572 wrote to memory of 4632	2572	PO_33948576383mth_pdf.exe	89
PID 2572 wrote to memory of 2232	2572	PO_33948576383mth_pdf.exe	91
PID 2572 wrote to memory of 2232	2572	PO_33948576383mth_pdf.exe	91
PID 2572 wrote to memory of 2232	2572	PO_33948576383mth_pdf.exe	91
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93
PID 2572 wrote to memory of 1392	2572	PO_33948576383mth_pdf.exe	93

C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\PO_33948576383mth_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:2572
- 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:3640
- 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:4632
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WZiSWBRtQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCBF0.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2232
- 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:1392

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:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
18KB

MD5
599515aeeeaad50e8ef5cd4634081009

SHA1
b6f7394f71bda538a38ebb2c62c6095fec307343

SHA256
dc59d408825a2d7804e292d074dd7d2ac2bd98be4ef32bc41b14339030823ad0

SHA512
241a4e891bd90d0ed0ca373a7e07fb521a871d5c648431a289eddcdab33026a0ae9a8345b338efeb4f9a87996f7bccb3e480a90671128f9501ca8ed23b26f7ee

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1iun0q5h.yst.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCBF0.tmp

Filesize
1KB

MD5
36d034928e2bcb661b8677fab01366c4

SHA1
5d62817b2a933a517d0276479f112e67e079bfe5

SHA256
b0b2db421c893815f7e2c9b126e7281ade01c3ecf1cd56bedd86b8b68eeaf659

SHA512
fe0fdc946dbdb29b39f6fe493c58ce41e3c974b8c7018f47ab916cc52bfad7579c7c4e39e6a4bd84f9b12456b08af629462d3db7ee3042b732367f9652157b70

Download Submit
memory/1392-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-87-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-88-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1392-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2572-8-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/2572-0-0x00000000745FE000-0x00000000745FF000-memory.dmp

Filesize
4KB

Download
memory/2572-10-0x000000000B740000-0x000000000B7DC000-memory.dmp

Filesize
624KB

Download
memory/2572-9-0x0000000008B70000-0x0000000008C2E000-memory.dmp

Filesize
760KB

Download
memory/2572-46-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/2572-7-0x00000000745FE000-0x00000000745FF000-memory.dmp

Filesize
4KB

Download
memory/2572-6-0x0000000005390000-0x00000000053A2000-memory.dmp

Filesize
72KB

Download
memory/2572-5-0x00000000051A0000-0x00000000051AA000-memory.dmp

Filesize
40KB

Download
memory/2572-4-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/2572-3-0x00000000050E0000-0x0000000005172000-memory.dmp

Filesize
584KB

Download
memory/2572-2-0x0000000005780000-0x0000000005D24000-memory.dmp

Filesize
5.6MB

Download
memory/2572-1-0x0000000000660000-0x0000000000744000-memory.dmp

Filesize
912KB

Download
memory/3640-20-0x00000000057D0000-0x0000000005836000-memory.dmp

Filesize
408KB

Download
memory/3640-52-0x0000000006160000-0x00000000061AC000-memory.dmp

Filesize
304KB

Download
memory/3640-55-0x0000000006680000-0x00000000066B2000-memory.dmp

Filesize
200KB

Download
memory/3640-66-0x0000000006650000-0x000000000666E000-memory.dmp

Filesize
120KB

Download
memory/3640-15-0x0000000002730000-0x0000000002766000-memory.dmp

Filesize
216KB

Download
memory/3640-67-0x00000000072C0000-0x0000000007363000-memory.dmp

Filesize
652KB

Download
memory/3640-78-0x0000000007A00000-0x000000000807A000-memory.dmp

Filesize
6.5MB

Download
memory/3640-16-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/3640-80-0x0000000007430000-0x000000000743A000-memory.dmp

Filesize
40KB

Download
memory/3640-81-0x0000000007640000-0x00000000076D6000-memory.dmp

Filesize
600KB

Download
memory/3640-17-0x00000000051A0000-0x00000000057C8000-memory.dmp

Filesize
6.2MB

Download
memory/3640-21-0x0000000005840000-0x00000000058A6000-memory.dmp

Filesize
408KB

Download
memory/3640-39-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/3640-85-0x0000000007700000-0x000000000771A000-memory.dmp

Filesize
104KB

Download
memory/3640-86-0x00000000076E0000-0x00000000076E8000-memory.dmp

Filesize
32KB

Download
memory/3640-56-0x0000000074E80000-0x0000000074ECC000-memory.dmp

Filesize
304KB

Download
memory/3640-51-0x0000000006090000-0x00000000060AE000-memory.dmp

Filesize
120KB

Download
memory/3640-19-0x00000000050B0000-0x00000000050D2000-memory.dmp

Filesize
136KB

Download
memory/3640-32-0x0000000005D20000-0x0000000006074000-memory.dmp

Filesize
3.3MB

Download
memory/3640-94-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/4632-95-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/4632-45-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/4632-84-0x00000000075D0000-0x00000000075E4000-memory.dmp

Filesize
80KB

Download
memory/4632-33-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/4632-31-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/4632-83-0x00000000075C0000-0x00000000075CE000-memory.dmp

Filesize
56KB

Download
memory/4632-82-0x0000000007590000-0x00000000075A1000-memory.dmp

Filesize
68KB

Download
memory/4632-79-0x0000000007390000-0x00000000073AA000-memory.dmp

Filesize
104KB

Download
memory/4632-68-0x0000000074E80000-0x0000000074ECC000-memory.dmp

Filesize
304KB

Download