remcos | 3f3e5f6ad074cfe5d07c1d8854fad3ad3244d7a049ad1e44f1e1109eb8d3ff12

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
31-08-2024 01:36

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General

Target

F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
Size

1009KB
MD5

f9eccf604a8ae2dc25e5ca83a5f0b4c8
SHA1

4e55e3ffeefca6bf918645cb0d1766e8ef81c2a3
SHA256

3f3e5f6ad074cfe5d07c1d8854fad3ad3244d7a049ad1e44f1e1109eb8d3ff12
SHA512

3b601a1375582eb5cac49b30c2c614dc098aba8ccb090cb25205276a8fb0a6712dfa717e2b98c885cc4ff04814cb7e5329509249155a87c6253200d54c3d73b4
SSDEEP

24576:5Xv0ftmuXnZoyVbZ1JBWzIeeYYUBQwBxdBpwIeRKC2:5/8mnsb/Wz9PYdKZY2

Score

10^/10

remcos remotehost collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

103.161.133.245:9898

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-LN5NIY
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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 6 IoCs

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

resource	yara_rule
behavioral2/memory/2344-39-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2344-38-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3792-37-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2344-36-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3792-35-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3792-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2344-39-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2344-38-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2344-36-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3792-37-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3792-35-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3792-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Reads user/profile data of web browsers 2 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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3200 set thread context of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 2392 set thread context of 3792	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	96
PID 2392 set thread context of 2344	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	97
PID 2392 set thread context of 3008	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	98

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2068	3008	WerFault.exe	98

System Location Discovery: System Language Discovery 1 TTPs 4 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	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3792	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
3792	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
3792	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
3792	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3008	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 3200 wrote to memory of 2392	3200	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	95
PID 2392 wrote to memory of 3792	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	96
PID 2392 wrote to memory of 3792	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	96
PID 2392 wrote to memory of 3792	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	96
PID 2392 wrote to memory of 3792	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	96
PID 2392 wrote to memory of 2344	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	97
PID 2392 wrote to memory of 2344	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	97
PID 2392 wrote to memory of 2344	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	97
PID 2392 wrote to memory of 2344	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	97
PID 2392 wrote to memory of 3008	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	98
PID 2392 wrote to memory of 3008	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	98
PID 2392 wrote to memory of 3008	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	98
PID 2392 wrote to memory of 3008	2392	F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe	98

C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
"C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3200
- C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
  "C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2392
- - C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
    C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe /stext "C:\Users\Admin\AppData\Local\Temp\vtokzhpwsizxalsizdanytqhis"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3792
- - C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
    C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe /stext "C:\Users\Admin\AppData\Local\Temp\fvtcszaygqrcksgmqomojgkqrhokbx"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2344
- - C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe
    C:\Users\Admin\AppData\Local\Temp\F9ECCF604A8AE2DC25E5CA83A5F0B4C8.exe /stext "C:\Users\Admin\AppData\Local\Temp\hqznsrkruyjhnycqayzqmlxhangtuiglr"
    3⤵
    - Suspicious use of UnmapMainImage
    PID:3008
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3008 -s 12
      4⤵
      Program crash
      PID:2068

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3008 -ip 3008
1⤵
PID:3340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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

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Downloads

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

Filesize
4KB

MD5
a7e181f6aa185be0ab0ca68b30406fe6

SHA1
58c86162658dc609615b8b6400f85c92506dfdc8

SHA256
c3071dc55b94db225d9c0f2c1b21c7e8f27dbfd168b85b7d618d8d19950e7ff2

SHA512
49969eb10e0bf7925940eb7374451f811658ef9ccfb83b86fb337c4d06c3ba17eb0181f598d9e0ec9ca25bfaf644209ac47b73d62ac924e73d03a4dcf8f8dd0f

Download Submit
memory/2344-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2344-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2344-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2344-29-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2344-36-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2392-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-49-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2392-50-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2392-46-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2392-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2392-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3008-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3200-11-0x00000000059B0000-0x00000000059C0000-memory.dmp

Filesize
64KB

Download
memory/3200-6-0x00000000059F0000-0x0000000005A8C000-memory.dmp

Filesize
624KB

Download
memory/3200-10-0x00000000059A0000-0x00000000059AC000-memory.dmp

Filesize
48KB

Download
memory/3200-2-0x0000000005DE0000-0x0000000006384000-memory.dmp

Filesize
5.6MB

Download
memory/3200-0-0x00000000751DE000-0x00000000751DF000-memory.dmp

Filesize
4KB

Download
memory/3200-3-0x00000000056D0000-0x0000000005762000-memory.dmp

Filesize
584KB

Download
memory/3200-18-0x00000000751D0000-0x0000000075980000-memory.dmp

Filesize
7.7MB

Download
memory/3200-12-0x0000000006AC0000-0x0000000006B80000-memory.dmp

Filesize
768KB

Download
memory/3200-4-0x00000000751D0000-0x0000000075980000-memory.dmp

Filesize
7.7MB

Download
memory/3200-1-0x0000000000BE0000-0x0000000000CE2000-memory.dmp

Filesize
1.0MB

Download
memory/3200-8-0x00000000751DE000-0x00000000751DF000-memory.dmp

Filesize
4KB

Download
memory/3200-9-0x00000000751D0000-0x0000000075980000-memory.dmp

Filesize
7.7MB

Download
memory/3200-7-0x0000000005920000-0x000000000593A000-memory.dmp

Filesize
104KB

Download
memory/3200-5-0x0000000005770000-0x000000000577A000-memory.dmp

Filesize
40KB

Download
memory/3792-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3792-28-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3792-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3792-35-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3792-32-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download