remcos | d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab

Analysis

max time kernel
148s
max time network
147s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
27-09-2024 01:49

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General

Target

d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe
Size

901KB
MD5

784b07833fbdca10528dbeb3eb1daffe
SHA1

beee89b885546c0dc98f7931f097f9659bbb8419
SHA256

d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab
SHA512

459916b828fcef6f3eb9aa2e123078a33907281ac47aab71bb3140ce446a6694bdb6347b1dec6678a96368768697a4045bd31b9110b2d87306a011296264dc4b
SSDEEP

24576:pSl++842srFVCeJ8E5WryTL/8bTAWrtCh:pSl++842srfp+EW4oAQtU

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_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-OTOIRK
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

Detected Nirsoft tools 3 IoCs

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

resource	yara_rule
behavioral1/memory/1308-67-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1948-77-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/324-76-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/324-76-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1308-67-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Executes dropped EXE 5 IoCs

pid	Process
2820	Adobe.exe
2584	Adobe.exe
1308	Adobe.exe
324	Adobe.exe
1948	Adobe.exe

Loads dropped DLL 2 IoCs

pid	Process
2648	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe
2648	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	Adobe.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	Adobe.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 2020 set thread context of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2820 set thread context of 2584	2820	Adobe.exe	32
PID 2584 set thread context of 1308	2584	Adobe.exe	34
PID 2584 set thread context of 324	2584	Adobe.exe	35
PID 2584 set thread context of 1948	2584	Adobe.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 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

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1308	Adobe.exe
1308	Adobe.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2584	Adobe.exe
2584	Adobe.exe
2584	Adobe.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1948	Adobe.exe

Suspicious use of WriteProcessMemory 45 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2020 wrote to memory of 2648	2020	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	30
PID 2648 wrote to memory of 2820	2648	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	31
PID 2648 wrote to memory of 2820	2648	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	31
PID 2648 wrote to memory of 2820	2648	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	31
PID 2648 wrote to memory of 2820	2648	d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe	31
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2820 wrote to memory of 2584	2820	Adobe.exe	32
PID 2584 wrote to memory of 1308	2584	Adobe.exe	34
PID 2584 wrote to memory of 1308	2584	Adobe.exe	34
PID 2584 wrote to memory of 1308	2584	Adobe.exe	34
PID 2584 wrote to memory of 1308	2584	Adobe.exe	34
PID 2584 wrote to memory of 1308	2584	Adobe.exe	34
PID 2584 wrote to memory of 324	2584	Adobe.exe	35
PID 2584 wrote to memory of 324	2584	Adobe.exe	35
PID 2584 wrote to memory of 324	2584	Adobe.exe	35
PID 2584 wrote to memory of 324	2584	Adobe.exe	35
PID 2584 wrote to memory of 324	2584	Adobe.exe	35
PID 2584 wrote to memory of 1948	2584	Adobe.exe	36
PID 2584 wrote to memory of 1948	2584	Adobe.exe	36
PID 2584 wrote to memory of 1948	2584	Adobe.exe	36
PID 2584 wrote to memory of 1948	2584	Adobe.exe	36
PID 2584 wrote to memory of 1948	2584	Adobe.exe	36

C:\Users\Admin\AppData\Local\Temp\d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe
"C:\Users\Admin\AppData\Local\Temp\d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Users\Admin\AppData\Local\Temp\d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe
  "C:\Users\Admin\AppData\Local\Temp\d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2648
- - 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:2820
  - - 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:2584
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\jklenwnjsddyfyhcv"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        
        PID:1308
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\lmroopydglwdhmvonrvf"
        5⤵
        Executes dropped EXE
        Accesses Microsoft Outlook accounts
        System Location Discovery: System Language Discovery
        
        PID:324
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\vgwhphieuboirsrswcigiigc"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:1948

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
901KB

MD5
784b07833fbdca10528dbeb3eb1daffe

SHA1
beee89b885546c0dc98f7931f097f9659bbb8419

SHA256
d99f687b6e744e9d9bdff2e59c273c85deff48dbaa52bf2d64009fd5ec4907ab

SHA512
459916b828fcef6f3eb9aa2e123078a33907281ac47aab71bb3140ce446a6694bdb6347b1dec6678a96368768697a4045bd31b9110b2d87306a011296264dc4b

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/324-71-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/324-69-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/324-76-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1308-64-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1308-67-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1308-66-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1948-75-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1948-77-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1948-73-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2020-6-0x00000000057F0000-0x00000000058B0000-memory.dmp

Filesize
768KB

Download
memory/2020-5-0x0000000074940000-0x000000007502E000-memory.dmp

Filesize
6.9MB

Download
memory/2020-4-0x000000007494E000-0x000000007494F000-memory.dmp

Filesize
4KB

Download
memory/2020-3-0x0000000000560000-0x0000000000570000-memory.dmp

Filesize
64KB

Download
memory/2020-2-0x0000000074940000-0x000000007502E000-memory.dmp

Filesize
6.9MB

Download
memory/2020-1-0x0000000000120000-0x0000000000208000-memory.dmp

Filesize
928KB

Download
memory/2020-22-0x0000000074940000-0x000000007502E000-memory.dmp

Filesize
6.9MB

Download
memory/2020-0-0x000000007494E000-0x000000007494F000-memory.dmp

Filesize
4KB

Download
memory/2584-51-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2584-87-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2584-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-91-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-90-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2584-86-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2584-83-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2648-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2648-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2648-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2820-34-0x000000007494E000-0x000000007494F000-memory.dmp

Filesize
4KB

Download
memory/2820-33-0x0000000000DA0000-0x0000000000E88000-memory.dmp

Filesize
928KB

Download