remcos | 4304f60f1efdc44fb82e632d7d6a15a62c8583aab914da08ec73b8bc709a209b

Analysis

max time kernel
149s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
19-09-2024 12:29

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General

Target

Quotation_pdf.exe
Size

938KB
MD5

041848dfe86c9d7e4f84a3b4bf065075
SHA1

33ae188d83c9bdcfc1e7c37604011161564d1ad3
SHA256

4304f60f1efdc44fb82e632d7d6a15a62c8583aab914da08ec73b8bc709a209b
SHA512

723086e68480c295cbdd57aeda44785f83cca40ef43a166a427135d3b7969fdbfc184a975a4da20b6bc66833f168477b13a50306f66ac5dcdbe95998514f6648
SSDEEP

24576:OiwEHfhzre4gZVF4tspROMsDInpvmMB/pAzDbY:/7SF4toYFqUDU

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
1660	powershell.exe
1532	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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	Quotation_pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2296 set thread context of 2692	2296	Quotation_pdf.exe	95

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	Quotation_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Quotation_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
3748	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2296	Quotation_pdf.exe
1660	powershell.exe
1532	powershell.exe
2296	Quotation_pdf.exe
1532	powershell.exe
1660	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2296	Quotation_pdf.exe
Token: SeDebugPrivilege	1532	powershell.exe
Token: SeDebugPrivilege	1660	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2296 wrote to memory of 1532	2296	Quotation_pdf.exe	89
PID 2296 wrote to memory of 1532	2296	Quotation_pdf.exe	89
PID 2296 wrote to memory of 1532	2296	Quotation_pdf.exe	89
PID 2296 wrote to memory of 1660	2296	Quotation_pdf.exe	91
PID 2296 wrote to memory of 1660	2296	Quotation_pdf.exe	91
PID 2296 wrote to memory of 1660	2296	Quotation_pdf.exe	91
PID 2296 wrote to memory of 3748	2296	Quotation_pdf.exe	93
PID 2296 wrote to memory of 3748	2296	Quotation_pdf.exe	93
PID 2296 wrote to memory of 3748	2296	Quotation_pdf.exe	93
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95
PID 2296 wrote to memory of 2692	2296	Quotation_pdf.exe	95

C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation_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:2296
- 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\Quotation_pdf.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1532
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\rxEKvCaIrm.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1660
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\rxEKvCaIrm" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA690.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3748
- C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Quotation_pdf.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2692

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
06538c81a9c6e248b80371a99b35bb72

SHA1
8ec180bf62032c50ee9fd4c53949ed47817190d6

SHA256
a9c0e7243789cf690bc2e3788cbe2b6924ab345352112005d3df4a333c87834f

SHA512
f8ee91b01c6042d1388f8ec8b1df0b455eb468346657652ffcf634fb1305df8bb0af0099e293f1f20a93265d6f76edbf1a703a54f97d5059a876ce10fd453126

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_avksvgna.byi.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA690.tmp

Filesize
1KB

MD5
edf2bec66b7881ba52d472fba6b69c62

SHA1
89d392198cc1eb29ab88d7c8448ef709a38c27c2

SHA256
e687cc117c8947db7590a7545fc441b919068ecc4cc9b89c476a646f9728c10f

SHA512
d67750cad4b06c3cb07baa665b4d7ba09d7ea0ee4880bd493b9b85d925e6f902e747a81798ca40ac570b738b80c1043c8a0a84d4e9e50fe25ab7342ba16a79b7

Download Submit
memory/1532-93-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1532-21-0x0000000005980000-0x00000000059E6000-memory.dmp

Filesize
408KB

Download
memory/1532-76-0x0000000007140000-0x00000000071E3000-memory.dmp

Filesize
652KB

Download
memory/1532-82-0x00000000076A0000-0x00000000076AE000-memory.dmp

Filesize
56KB

Download
memory/1532-74-0x00000000066C0000-0x00000000066DE000-memory.dmp

Filesize
120KB

Download
memory/1532-86-0x0000000007790000-0x0000000007798000-memory.dmp

Filesize
32KB

Download
memory/1532-54-0x0000000006740000-0x0000000006772000-memory.dmp

Filesize
200KB

Download
memory/1532-15-0x0000000002820000-0x0000000002856000-memory.dmp

Filesize
216KB

Download
memory/1532-77-0x0000000007B90000-0x000000000820A000-memory.dmp

Filesize
6.5MB

Download
memory/1532-22-0x00000000059F0000-0x0000000005A56000-memory.dmp

Filesize
408KB

Download
memory/1532-81-0x0000000007670000-0x0000000007681000-memory.dmp

Filesize
68KB

Download
memory/1532-78-0x0000000007260000-0x000000000727A000-memory.dmp

Filesize
104KB

Download
memory/1532-56-0x0000000074F10000-0x0000000074F5C000-memory.dmp

Filesize
304KB

Download
memory/1532-50-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1532-16-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1532-17-0x0000000005350000-0x0000000005978000-memory.dmp

Filesize
6.2MB

Download
memory/1532-19-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1532-20-0x00000000052A0000-0x00000000052C2000-memory.dmp

Filesize
136KB

Download
memory/1660-92-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1660-79-0x0000000007560000-0x000000000756A000-memory.dmp

Filesize
40KB

Download
memory/1660-35-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1660-85-0x0000000007830000-0x000000000784A000-memory.dmp

Filesize
104KB

Download
memory/1660-24-0x0000000005C00000-0x0000000005F54000-memory.dmp

Filesize
3.3MB

Download
memory/1660-84-0x0000000007730000-0x0000000007744000-memory.dmp

Filesize
80KB

Download
memory/1660-83-0x0000000007720000-0x000000000772E000-memory.dmp

Filesize
56KB

Download
memory/1660-53-0x0000000006200000-0x000000000624C000-memory.dmp

Filesize
304KB

Download
memory/1660-52-0x00000000061D0000-0x00000000061EE000-memory.dmp

Filesize
120KB

Download
memory/1660-55-0x0000000074F10000-0x0000000074F5C000-memory.dmp

Filesize
304KB

Download
memory/1660-23-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/1660-80-0x0000000007770000-0x0000000007806000-memory.dmp

Filesize
600KB

Download
memory/1660-44-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/2296-8-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/2296-0-0x000000007466E000-0x000000007466F000-memory.dmp

Filesize
4KB

Download
memory/2296-6-0x0000000007290000-0x00000000072A0000-memory.dmp

Filesize
64KB

Download
memory/2296-1-0x0000000000E50000-0x0000000000F40000-memory.dmp

Filesize
960KB

Download
memory/2296-5-0x0000000005920000-0x000000000592A000-memory.dmp

Filesize
40KB

Download
memory/2296-51-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/2296-9-0x0000000007740000-0x00000000077FE000-memory.dmp

Filesize
760KB

Download
memory/2296-3-0x0000000005950000-0x00000000059E2000-memory.dmp

Filesize
584KB

Download
memory/2296-4-0x0000000074660000-0x0000000074E10000-memory.dmp

Filesize
7.7MB

Download
memory/2296-10-0x0000000009DA0000-0x0000000009E3C000-memory.dmp

Filesize
624KB

Download
memory/2296-2-0x0000000005F00000-0x00000000064A4000-memory.dmp

Filesize
5.6MB

Download
memory/2296-7-0x000000007466E000-0x000000007466F000-memory.dmp

Filesize
4KB

Download
memory/2692-94-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-106-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-95-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-97-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-96-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-98-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-107-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2692-108-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download