remcos | 9c1dd67562324157ceab4d8e050c84150afc6ddff6aec72206ab437c31aac7bb

Analysis

max time kernel
148s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
24-09-2024 10:22

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General

Target

BNE400266900B - RLS SO# W317pdf.scr.exe
Size

911KB
MD5

b5d9738bbe1f9563cdc8808c96135415
SHA1

d29d5768719a3bf4381293775af31d5bcdf11ca3
SHA256

9c1dd67562324157ceab4d8e050c84150afc6ddff6aec72206ab437c31aac7bb
SHA512

fac077ca47baa5250a3092e50568e14447e7ac00b4cadb766736c5bacd38b86ae4679c1d63508b9b0ceab808d2ce5df4384d88cf9e6fe31d65f165e13c60d1ee
SSDEEP

24576:q2IgEfML+PtaSdOHOvY8r4A7L1r/6A4hhqIU1Xw0A6oC:q2skSoOQS4A7L1ri6r1XpBT

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
behavioral2/memory/1464-55-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3116-56-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3468-54-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1464-55-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3468-54-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	BNE400266900B - RLS SO# W317pdf.scr.exe

Executes dropped EXE 7 IoCs

pid	Process
1100	Adobe.exe
5068	Adobe.exe
1180	Adobe.exe
3468	Adobe.exe
3456	Adobe.exe
1464	Adobe.exe
3116	Adobe.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-1-5-21-4182098368-2521458979-3782681353-1000\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-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	BNE400266900B - RLS SO# W317pdf.scr.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	BNE400266900B - RLS SO# W317pdf.scr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\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 4904 set thread context of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 1100 set thread context of 5068	1100	Adobe.exe	92
PID 5068 set thread context of 3468	5068	Adobe.exe	95
PID 5068 set thread context of 1464	5068	Adobe.exe	97
PID 5068 set thread context of 3116	5068	Adobe.exe	98

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	BNE400266900B - RLS SO# W317pdf.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BNE400266900B - RLS SO# W317pdf.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 8 IoCs

pid	Process
4904	BNE400266900B - RLS SO# W317pdf.scr.exe
4904	BNE400266900B - RLS SO# W317pdf.scr.exe
3468	Adobe.exe
3468	Adobe.exe
3116	Adobe.exe
3116	Adobe.exe
3468	Adobe.exe
3468	Adobe.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
5068	Adobe.exe
5068	Adobe.exe
5068	Adobe.exe
5068	Adobe.exe
5068	Adobe.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4904	BNE400266900B - RLS SO# W317pdf.scr.exe
Token: SeDebugPrivilege	3116	Adobe.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 4904 wrote to memory of 1720	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	89
PID 4904 wrote to memory of 1720	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	89
PID 4904 wrote to memory of 1720	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	89
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 4904 wrote to memory of 1460	4904	BNE400266900B - RLS SO# W317pdf.scr.exe	90
PID 1460 wrote to memory of 1100	1460	BNE400266900B - RLS SO# W317pdf.scr.exe	91
PID 1460 wrote to memory of 1100	1460	BNE400266900B - RLS SO# W317pdf.scr.exe	91
PID 1460 wrote to memory of 1100	1460	BNE400266900B - RLS SO# W317pdf.scr.exe	91
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 1100 wrote to memory of 5068	1100	Adobe.exe	92
PID 5068 wrote to memory of 1180	5068	Adobe.exe	94
PID 5068 wrote to memory of 1180	5068	Adobe.exe	94
PID 5068 wrote to memory of 1180	5068	Adobe.exe	94
PID 5068 wrote to memory of 3468	5068	Adobe.exe	95
PID 5068 wrote to memory of 3468	5068	Adobe.exe	95
PID 5068 wrote to memory of 3468	5068	Adobe.exe	95
PID 5068 wrote to memory of 3468	5068	Adobe.exe	95
PID 5068 wrote to memory of 3456	5068	Adobe.exe	96
PID 5068 wrote to memory of 3456	5068	Adobe.exe	96
PID 5068 wrote to memory of 3456	5068	Adobe.exe	96
PID 5068 wrote to memory of 1464	5068	Adobe.exe	97
PID 5068 wrote to memory of 1464	5068	Adobe.exe	97
PID 5068 wrote to memory of 1464	5068	Adobe.exe	97
PID 5068 wrote to memory of 1464	5068	Adobe.exe	97
PID 5068 wrote to memory of 3116	5068	Adobe.exe	98
PID 5068 wrote to memory of 3116	5068	Adobe.exe	98
PID 5068 wrote to memory of 3116	5068	Adobe.exe	98
PID 5068 wrote to memory of 3116	5068	Adobe.exe	98

C:\Users\Admin\AppData\Local\Temp\BNE400266900B - RLS SO# W317pdf.scr.exe
"C:\Users\Admin\AppData\Local\Temp\BNE400266900B - RLS SO# W317pdf.scr.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4904
- C:\Users\Admin\AppData\Local\Temp\BNE400266900B - RLS SO# W317pdf.scr.exe
  "C:\Users\Admin\AppData\Local\Temp\BNE400266900B - RLS SO# W317pdf.scr.exe"
  2⤵
  PID:1720
- C:\Users\Admin\AppData\Local\Temp\BNE400266900B - RLS SO# W317pdf.scr.exe
  "C:\Users\Admin\AppData\Local\Temp\BNE400266900B - RLS SO# W317pdf.scr.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1460
- - 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:1100
  - - 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:5068
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\ygdturfhatuibjrzzlm"
        5⤵
        Executes dropped EXE
        
        PID:1180
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\ygdturfhatuibjrzzlm"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        
        PID:3468
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\jijevjqbobmnlqfdqwzhpt"
        5⤵
        Executes dropped EXE
        
        PID:3456
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\jijevjqbobmnlqfdqwzhpt"
        5⤵
        Executes dropped EXE
        Accesses Microsoft Outlook accounts
        System Location Discovery: System Language Discovery
        
        PID:1464
    - - C:\ProgramData\Adobe\Adobe.exe
        
        C:\ProgramData\Adobe\Adobe.exe /stext "C:\Users\Admin\AppData\Local\Temp\lcowvcaccjesoebhzgmiafwqe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3116

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

Query Registry

T1012

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
911KB

MD5
b5d9738bbe1f9563cdc8808c96135415

SHA1
d29d5768719a3bf4381293775af31d5bcdf11ca3

SHA256
9c1dd67562324157ceab4d8e050c84150afc6ddff6aec72206ab437c31aac7bb

SHA512
fac077ca47baa5250a3092e50568e14447e7ac00b4cadb766736c5bacd38b86ae4679c1d63508b9b0ceab808d2ce5df4384d88cf9e6fe31d65f165e13c60d1ee

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

Filesize
4KB

MD5
faaa2b16df1bfc1a3792faaa35786349

SHA1
359534a59d7c5139ae205c24533ba60afdfb9f3f

SHA256
3586befc3b8b4da223e2ee0dcb00965ba5c0a205c14f2acefdeec7e46efddd5a

SHA512
2fbc79cace52a58e69ab983d034bb41ebb2496f767e18e5e4b31eefc4447c935d8614f744c71302e459350a05562fadc4c2355d76638b595e7cff1bb3d1618db

Download Submit
memory/1100-30-0x0000000073DEE000-0x0000000073DEF000-memory.dmp

Filesize
4KB

Download
memory/1100-29-0x0000000073DEE000-0x0000000073DEF000-memory.dmp

Filesize
4KB

Download
memory/1460-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1460-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1460-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1460-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1460-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1464-52-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1464-47-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1464-55-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3116-49-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3116-51-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3116-56-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3468-53-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3468-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3468-54-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4904-17-0x00000000744E0000-0x0000000074C90000-memory.dmp

Filesize
7.7MB

Download
memory/4904-2-0x0000000006060000-0x0000000006604000-memory.dmp

Filesize
5.6MB

Download
memory/4904-10-0x000000000A750000-0x000000000A7EC000-memory.dmp

Filesize
624KB

Download
memory/4904-1-0x0000000000FF0000-0x00000000010DA000-memory.dmp

Filesize
936KB

Download
memory/4904-0-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/4904-3-0x0000000005B50000-0x0000000005BE2000-memory.dmp

Filesize
584KB

Download
memory/4904-4-0x0000000005B00000-0x0000000005B0A000-memory.dmp

Filesize
40KB

Download
memory/4904-5-0x00000000744E0000-0x0000000074C90000-memory.dmp

Filesize
7.7MB

Download
memory/4904-6-0x0000000007B50000-0x0000000007B62000-memory.dmp

Filesize
72KB

Download
memory/4904-7-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/4904-8-0x00000000744E0000-0x0000000074C90000-memory.dmp

Filesize
7.7MB

Download
memory/4904-9-0x0000000007FF0000-0x00000000080B0000-memory.dmp

Filesize
768KB

Download
memory/5068-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-62-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/5068-66-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/5068-65-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/5068-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/5068-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download