remcos | a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-11-2024 07:53

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General

Target

a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe
Size

1.9MB
MD5

6f4b9a86ae77415b5497874919ddf6d1
SHA1

1986f8eb59766fca81c04ee26ce36e6f0aca0a99
SHA256

a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8
SHA512

8b818fd1531b45a47571dfebdc8730114bbad58ec6db64f81591ee78ea84eee0c07074c38475c994a44b36324b3f22fc3de201e4dc4bfb39019e2700c7c02ba2
SSDEEP

49152:FVg5tQ7aWpVDYcHDNYiOE/rvSt7Ch+aodoHwGgQG5:rg56Zhj+iO8SB3DbQ

Score

10^/10

remcos remotehost collection discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

162.251.122.86:6644

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-CGA6IQ
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 5 IoCs

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

resource	yara_rule
behavioral2/memory/4732-40-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3468-43-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/696-39-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4732-37-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4732-47-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3468-43-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4732-40-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4732-37-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4732-47-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dews.vbs	dews.exe

Executes dropped EXE 1 IoCs

pid	Process
1120	dews.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000d000000023b6c-9.dat	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1120 set thread context of 1364	1120	dews.exe	88
PID 1364 set thread context of 4732	1364	svchost.exe	94
PID 1364 set thread context of 3468	1364	svchost.exe	96
PID 1364 set thread context of 696	1364	svchost.exe	97

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	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	a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dews.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4732	svchost.exe
4732	svchost.exe
696	svchost.exe
696	svchost.exe
4732	svchost.exe
4732	svchost.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
1120	dews.exe
1364	svchost.exe
1364	svchost.exe
1364	svchost.exe
1364	svchost.exe
1364	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	696	svchost.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 1120	3164	a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe	86
PID 3164 wrote to memory of 1120	3164	a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe	86
PID 3164 wrote to memory of 1120	3164	a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe	86
PID 1120 wrote to memory of 1364	1120	dews.exe	88
PID 1120 wrote to memory of 1364	1120	dews.exe	88
PID 1120 wrote to memory of 1364	1120	dews.exe	88
PID 1120 wrote to memory of 1364	1120	dews.exe	88
PID 1364 wrote to memory of 1716	1364	svchost.exe	93
PID 1364 wrote to memory of 1716	1364	svchost.exe	93
PID 1364 wrote to memory of 1716	1364	svchost.exe	93
PID 1364 wrote to memory of 4732	1364	svchost.exe	94
PID 1364 wrote to memory of 4732	1364	svchost.exe	94
PID 1364 wrote to memory of 4732	1364	svchost.exe	94
PID 1364 wrote to memory of 4732	1364	svchost.exe	94
PID 1364 wrote to memory of 2272	1364	svchost.exe	95
PID 1364 wrote to memory of 2272	1364	svchost.exe	95
PID 1364 wrote to memory of 2272	1364	svchost.exe	95
PID 1364 wrote to memory of 3468	1364	svchost.exe	96
PID 1364 wrote to memory of 3468	1364	svchost.exe	96
PID 1364 wrote to memory of 3468	1364	svchost.exe	96
PID 1364 wrote to memory of 3468	1364	svchost.exe	96
PID 1364 wrote to memory of 696	1364	svchost.exe	97
PID 1364 wrote to memory of 696	1364	svchost.exe	97
PID 1364 wrote to memory of 696	1364	svchost.exe	97
PID 1364 wrote to memory of 696	1364	svchost.exe	97

C:\Users\Admin\AppData\Local\Temp\a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe
"C:\Users\Admin\AppData\Local\Temp\a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Users\Admin\AppData\Local\overrough\dews.exe
  "C:\Users\Admin\AppData\Local\Temp\a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1120
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:1364
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\jyuyswoosfrfjyzwnmmulzmfpu"
      4⤵
      PID:1716
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\jyuyswoosfrfjyzwnmmulzmfpu"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4732
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\usiqthzignjslevaewzvwmgoyjimz"
      4⤵
      PID:2272
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\usiqthzignjslevaewzvwmgoyjimz"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:3468
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\eunbuzkkuvbxvkjeohtpzrtfhpavarja"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:696

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\jyuyswoosfrfjyzwnmmulzmfpu

Filesize
4KB

MD5
57509a6a6267f17bef5e5da8b1df8829

SHA1
0886741be12c4e6dd24688df7b9568e91b2fc2aa

SHA256
4d50e4b2ee7b25d6a88dea6a28503975ca95f98e6e72fcd1ee754d016df3ed3d

SHA512
019c20a2354ef20ff3870ea4d544ae4e7ec21729bfbeb19d2dd2f8b087fcb6b83f259ab2f35e0f3c7f044ebb7c5bbfdfc63f23b811d458a15f5ad35aa9175228

Download Submit
C:\Users\Admin\AppData\Local\overrough\dews.exe

Filesize
1.9MB

MD5
6f4b9a86ae77415b5497874919ddf6d1

SHA1
1986f8eb59766fca81c04ee26ce36e6f0aca0a99

SHA256
a6efd2f90c60aa91d0066df9ec79d8a72d99e942d49c8e7327f82c58b86077a8

SHA512
8b818fd1531b45a47571dfebdc8730114bbad58ec6db64f81591ee78ea84eee0c07074c38475c994a44b36324b3f22fc3de201e4dc4bfb39019e2700c7c02ba2

Download Submit
memory/696-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/696-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/696-39-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1120-18-0x0000000001580000-0x0000000001980000-memory.dmp

Filesize
4.0MB

Download
memory/1364-54-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-62-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-25-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-26-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-27-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-29-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-28-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-31-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-65-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-24-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-23-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-64-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-63-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-59-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-22-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-21-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-61-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-60-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-58-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-20-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-49-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1364-53-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1364-52-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1364-57-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-55-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/1364-56-0x0000000000400000-0x0000000000593000-memory.dmp

Filesize
1.6MB

Download
memory/3164-6-0x00000000017C0000-0x0000000001BC0000-memory.dmp

Filesize
4.0MB

Download
memory/3468-34-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3468-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3468-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4732-47-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4732-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4732-35-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4732-40-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4732-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download