remcos | 93ea6ac422f90a1031160360409fea1c16c533be06cc2b6e71e748ee3d20683a

Analysis

max time kernel
148s
max time network
129s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02-12-2024 21:04

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General

Target

ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe
Size

945KB
MD5

a21780a599c30bcf11b6152ff9d16be2
SHA1

953f98a9904c76b275809bad78d16cf550f2483d
SHA256

93ea6ac422f90a1031160360409fea1c16c533be06cc2b6e71e748ee3d20683a
SHA512

8e1f69a23b508c2cc4c61b001b91645a91211c89e11d35237cc78890c68f96362151a7db7da85045d9a639bd717110e965c92eaaa546b8f9702620e6022d8d59
SSDEEP

24576:gjb4DeayiRyXCTovSWHH00vbqc+Su9NvyqWPCx:gf5+k1n00D4ScN69PCx

Score

10^/10

remcos remotehost collection discovery persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

104.250.180.178:7902

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Adobe.exe
copy_folder
Adobe
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Adobe_Nov-3XE9WN
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
Remcos family
remcos

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

Processes:

resource	yara_rule
behavioral1/memory/1824-71-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2976-65-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1640-73-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/1824-71-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/2976-65-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Executes dropped EXE 6 IoCs

Processes:

Adobe.exeAdobe.exeAdobe.exeAdobe.exeAdobe.exeAdobe.exe

pid	Process
2220	Adobe.exe
2780	Adobe.exe
2976	Adobe.exe
1824	Adobe.exe
1736	Adobe.exe
1640	Adobe.exe

Loads dropped DLL 1 IoCs

Processes:

ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe

pid	Process
2756	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

Adobe.exe

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Adobe.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exeAdobe.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\Adobe_Nov-3XE9WN = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe_Nov-3XE9WN = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\Adobe_Nov-3XE9WN = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	Adobe.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe_Nov-3XE9WN = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	Adobe.exe

Suspicious use of SetThreadContext 5 IoCs

Processes:

ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exeAdobe.exeAdobe.exe

description	pid	Process	procid_target
PID 1840 set thread context of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 2220 set thread context of 2780	2220	Adobe.exe	34
PID 2780 set thread context of 2976	2780	Adobe.exe	36
PID 2780 set thread context of 1824	2780	Adobe.exe	38
PID 2780 set thread context of 1640	2780	Adobe.exe	39

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 7 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

Processes:

ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exeISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exeAdobe.exeAdobe.exeAdobe.exeAdobe.exeAdobe.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Adobe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Adobe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Adobe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Adobe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Adobe.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Adobe.exe

pid	Process
2976	Adobe.exe
2976	Adobe.exe

Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

Adobe.exe

pid	Process
2780	Adobe.exe
2780	Adobe.exe
2780	Adobe.exe
2780	Adobe.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Adobe.exe

description	pid	Process
Token: SeDebugPrivilege	1640	Adobe.exe

Suspicious use of WriteProcessMemory 45 IoCs

Processes:

ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exeISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exeAdobe.exeAdobe.exe

description	pid	Process	procid_target
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 1840 wrote to memory of 2756	1840	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	32
PID 2756 wrote to memory of 2220	2756	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	33
PID 2756 wrote to memory of 2220	2756	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	33
PID 2756 wrote to memory of 2220	2756	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	33
PID 2756 wrote to memory of 2220	2756	ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe	33
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2220 wrote to memory of 2780	2220	Adobe.exe	34
PID 2780 wrote to memory of 2976	2780	Adobe.exe	36
PID 2780 wrote to memory of 2976	2780	Adobe.exe	36
PID 2780 wrote to memory of 2976	2780	Adobe.exe	36
PID 2780 wrote to memory of 2976	2780	Adobe.exe	36
PID 2780 wrote to memory of 2976	2780	Adobe.exe	36
PID 2780 wrote to memory of 1736	2780	Adobe.exe	37
PID 2780 wrote to memory of 1736	2780	Adobe.exe	37
PID 2780 wrote to memory of 1736	2780	Adobe.exe	37
PID 2780 wrote to memory of 1736	2780	Adobe.exe	37
PID 2780 wrote to memory of 1824	2780	Adobe.exe	38
PID 2780 wrote to memory of 1824	2780	Adobe.exe	38
PID 2780 wrote to memory of 1824	2780	Adobe.exe	38
PID 2780 wrote to memory of 1824	2780	Adobe.exe	38
PID 2780 wrote to memory of 1824	2780	Adobe.exe	38
PID 2780 wrote to memory of 1640	2780	Adobe.exe	39
PID 2780 wrote to memory of 1640	2780	Adobe.exe	39
PID 2780 wrote to memory of 1640	2780	Adobe.exe	39
PID 2780 wrote to memory of 1640	2780	Adobe.exe	39
PID 2780 wrote to memory of 1640	2780	Adobe.exe	39

C:\Users\Admin\AppData\Local\Temp\ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe
"C:\Users\Admin\AppData\Local\Temp\ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Users\Admin\AppData\Local\Temp\ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe
  "C:\Users\Admin\AppData\Local\Temp\ISF (TWN24110458 - Invoice & Packing List PO POUS120000241, POUS120000771.scr.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2756
- - C:\ProgramData\Adobe\Adobe.exe
    "C:\ProgramData\Adobe\Adobe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2220
  - - C:\ProgramData\Adobe\Adobe.exe
      "C:\ProgramData\Adobe\Adobe.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:2780
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\alnuo"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        
        PID:2976
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\kfsnpeou"
        5⤵
        Executes dropped EXE
        
        PID:1736
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\kfsnpeou"
        5⤵
        Executes dropped EXE
        Accesses Microsoft Outlook accounts
        System Location Discovery: System Language Discovery
        
        PID:1824
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\uiffpxyvcggn"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:1640

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Adobe\Adobe.exe

Filesize
945KB

MD5
a21780a599c30bcf11b6152ff9d16be2

SHA1
953f98a9904c76b275809bad78d16cf550f2483d

SHA256
93ea6ac422f90a1031160360409fea1c16c533be06cc2b6e71e748ee3d20683a

SHA512
8e1f69a23b508c2cc4c61b001b91645a91211c89e11d35237cc78890c68f96362151a7db7da85045d9a639bd717110e965c92eaaa546b8f9702620e6022d8d59

Download Submit
C:\Users\Admin\AppData\Local\Temp\alnuo

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/1640-68-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1640-73-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1640-72-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1824-70-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1824-63-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1824-71-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1840-4-0x0000000074C1E000-0x0000000074C1F000-memory.dmp

Filesize
4KB

Download
memory/1840-23-0x0000000074C10000-0x00000000752FE000-memory.dmp

Filesize
6.9MB

Download
memory/1840-6-0x0000000004F10000-0x0000000004FD2000-memory.dmp

Filesize
776KB

Download
memory/1840-5-0x0000000074C10000-0x00000000752FE000-memory.dmp

Filesize
6.9MB

Download
memory/1840-3-0x0000000000600000-0x0000000000618000-memory.dmp

Filesize
96KB

Download
memory/1840-2-0x0000000074C10000-0x00000000752FE000-memory.dmp

Filesize
6.9MB

Download
memory/1840-1-0x0000000000BC0000-0x0000000000CB2000-memory.dmp

Filesize
968KB

Download
memory/1840-0-0x0000000074C1E000-0x0000000074C1F000-memory.dmp

Filesize
4KB

Download
memory/2220-30-0x0000000074C10000-0x00000000752FE000-memory.dmp

Filesize
6.9MB

Download
memory/2220-29-0x0000000001380000-0x0000000001472000-memory.dmp

Filesize
968KB

Download
memory/2220-31-0x0000000074C10000-0x00000000752FE000-memory.dmp

Filesize
6.9MB

Download
memory/2220-32-0x00000000050D0000-0x0000000005192000-memory.dmp

Filesize
776KB

Download
memory/2220-51-0x0000000074C10000-0x00000000752FE000-memory.dmp

Filesize
6.9MB

Download
memory/2756-10-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2756-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2756-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2756-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2756-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2756-8-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2756-9-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2756-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2756-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-86-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-90-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-89-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-45-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2780-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-79-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2780-82-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2780-83-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2780-84-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-85-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-88-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2780-87-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2976-59-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2976-65-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2976-61-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download