remcos | 25d7d9203489d28551d949f5a668c55347f34641eed17ef065e4b5884a09a219

Analysis

max time kernel
147s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04/11/2024, 04:45

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General

Target

Bunker Notification_pdf.exe
Size

1.5MB
MD5

5ab91d5300577930a3ec8e2bd897ca33
SHA1

a77d800b2c961a9e48e6ddf473a0e0edf09c7cbd
SHA256

bbf5e00ee212abad8f3f658e642b896c73f6b6159b1a49a2adb86b7f2f0f46b9
SHA512

fb5ff26ee8a4b831978790780f38735f8891de859a325615a9837e26ce60941171f55a45273a8c7b450c16ddfff646783db9b21bd3978af6cb9e56b7144866d5
SSDEEP

24576:cAHnh+eWsN3skA4RV1Hom2KXFmIas9tlB8EmOhXMUNhL8HZxhvAN5s8zuzA5:7h+ZkldoPK1Xas/jRFL85xhOvH

Score

10^/10

remcos remotehost collection discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

154.216.18.214:2404

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-AOD6MB
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 8 IoCs

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

resource	yara_rule
behavioral2/memory/3872-48-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1064-52-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3872-53-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1036-50-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3872-49-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1036-57-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1036-47-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1064-59-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3872-48-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3872-53-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3872-49-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1064-52-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1064-59-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1000 set thread context of 1284	1000	Bunker Notification_pdf.exe	89
PID 1284 set thread context of 1064	1284	svchost.exe	95
PID 1284 set thread context of 3872	1284	svchost.exe	96
PID 1284 set thread context of 1036	1284	svchost.exe	98

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1784	1000	WerFault.exe	88

System Location Discovery: System Language Discovery 1 TTPs 6 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	Bunker Notification_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bunker Notification_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1064	svchost.exe
1064	svchost.exe
1036	svchost.exe
1036	svchost.exe
1064	svchost.exe
1064	svchost.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
628	Bunker Notification_pdf.exe
1000	Bunker Notification_pdf.exe
1284	svchost.exe
1284	svchost.exe
1284	svchost.exe
1284	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1036	svchost.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 5040	628	Bunker Notification_pdf.exe	86
PID 628 wrote to memory of 5040	628	Bunker Notification_pdf.exe	86
PID 628 wrote to memory of 5040	628	Bunker Notification_pdf.exe	86
PID 628 wrote to memory of 1000	628	Bunker Notification_pdf.exe	88
PID 628 wrote to memory of 1000	628	Bunker Notification_pdf.exe	88
PID 628 wrote to memory of 1000	628	Bunker Notification_pdf.exe	88
PID 1000 wrote to memory of 1284	1000	Bunker Notification_pdf.exe	89
PID 1000 wrote to memory of 1284	1000	Bunker Notification_pdf.exe	89
PID 1000 wrote to memory of 1284	1000	Bunker Notification_pdf.exe	89
PID 1000 wrote to memory of 1284	1000	Bunker Notification_pdf.exe	89
PID 1284 wrote to memory of 1064	1284	svchost.exe	95
PID 1284 wrote to memory of 1064	1284	svchost.exe	95
PID 1284 wrote to memory of 1064	1284	svchost.exe	95
PID 1284 wrote to memory of 1064	1284	svchost.exe	95
PID 1284 wrote to memory of 3872	1284	svchost.exe	96
PID 1284 wrote to memory of 3872	1284	svchost.exe	96
PID 1284 wrote to memory of 3872	1284	svchost.exe	96
PID 1284 wrote to memory of 3872	1284	svchost.exe	96
PID 1284 wrote to memory of 768	1284	svchost.exe	97
PID 1284 wrote to memory of 768	1284	svchost.exe	97
PID 1284 wrote to memory of 768	1284	svchost.exe	97
PID 1284 wrote to memory of 1036	1284	svchost.exe	98
PID 1284 wrote to memory of 1036	1284	svchost.exe	98
PID 1284 wrote to memory of 1036	1284	svchost.exe	98
PID 1284 wrote to memory of 1036	1284	svchost.exe	98

C:\Users\Admin\AppData\Local\Temp\Bunker Notification_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Bunker Notification_pdf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\Bunker Notification_pdf.exe"
  2⤵
  PID:5040
- C:\Users\Admin\AppData\Local\Temp\Bunker Notification_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Bunker Notification_pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1000
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\Bunker Notification_pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:1284
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ivjsklzz"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:1064
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\kxodlekbyqh"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:3872
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\vrtvlwuvmyzftqt"
      4⤵
      PID:768
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\vrtvlwuvmyzftqt"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1036
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1000 -s 612
    3⤵
    - Program crash
    PID:1784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1000 -ip 1000
1⤵
PID:1424

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\finitism

Filesize
140KB

MD5
5e453263ab15cff0faa49ace1dea3df9

SHA1
df823ffce8714ce1eebd6d359893b21389d5eb54

SHA256
476e490452c9a910d02729f2652c74a146ef0aee11476e93bc149fc4f962670f

SHA512
01e91236ac60b0498a83fc69c9f89ee9b456631b65f96ecea57218da2bac3ac517e2f88e90924cd407d8d454899e1e733a4fc16bd07ef52ffdda7b9e288c9d09

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

Filesize
483KB

MD5
5150091a091feaf4e3938dc93aa890a1

SHA1
53e52e04798918c66938c80673c82bc1920d9506

SHA256
9d37b9c878bd89b0fc6de8ddb607faa299ce2e5f53f40166422b79035801f1d2

SHA512
aa59d9e865f6ff4ec6fe1f118ac3d421f262c8c2baf6a8e223951e10d21acdcdfe2aadbae239f260a8d7e1c8f11b164ae9c7091b50e37d2e1e4b92384762aa00

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

Filesize
4KB

MD5
ac300aeaf27709e2067788fdd4624843

SHA1
e98edd4615d35de96e30f1a0e13c05b42ee7eb7b

SHA256
d2637d58bb120dc6fefe2f38d6e0d4b308006b8639106a7f9e915fa80b5cc9d9

SHA512
09c46e708f9d253dccd4d943639d9f8126f868ae3dcd951aad12222bb98b5d3814676f878c8391b9bdab5dedcf5b9e9eaeb2ad3ffec57bda875198735586d4df

Download Submit
memory/628-11-0x0000000001220000-0x0000000001620000-memory.dmp

Filesize
4.0MB

Download
memory/1000-25-0x0000000001080000-0x0000000001480000-memory.dmp

Filesize
4.0MB

Download
memory/1036-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1036-46-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1036-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1036-57-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1036-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1064-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1064-59-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1064-45-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1064-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1064-52-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1284-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-61-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1284-65-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1284-64-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1284-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1284-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3872-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3872-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3872-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3872-53-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3872-48-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download