remcos | f127eced7a835fecf3453bcb307040fb4e91bfc0c63983d2a8d6c0dd72a4e5c1

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30-08-2024 05:23

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General

Target

rYhL.exe
Size

939KB
MD5

ca4ccb77c304e8074abd359dd086ede4
SHA1

4a17bc625d34ccde78a62db109877f8e9d808d70
SHA256

f127eced7a835fecf3453bcb307040fb4e91bfc0c63983d2a8d6c0dd72a4e5c1
SHA512

f2ee3df238385bcadb32dd658330e825252de969d8a1e24a0457e8f7268c362d8c73420f2e062e920d6a3e975f2b74a091475a63e0150837af9e013a674a71f2
SSDEEP

24576:kEbp9p29m6p2SxSrExb5Ag+PmiCix5InZg0SO:Xl90X8Axb5Ag+Pm7O5Ie0SO

Score

10^/10

remcos remotehost collection credential_access discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

127.0.0.1:2404

67.207.161.204:2404

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-ZA03K9
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 9 IoCs

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

resource	yara_rule
behavioral2/memory/3620-34-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3228-37-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3620-36-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3228-38-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3228-35-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3620-39-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/752-51-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3760-50-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/624-47-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 4 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3620-34-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3620-36-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3620-39-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/624-47-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/752-51-0x0000000000400000-0x0000000000478000-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 2 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	rYhL.exe
Key opened	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	rYhL.exe

Suspicious use of SetThreadContext 7 IoCs

description	pid	Process	procid_target
PID 4640 set thread context of 4380	4640	rYhL.exe	94
PID 4380 set thread context of 696	4380	rYhL.exe	95
PID 4380 set thread context of 3620	4380	rYhL.exe	98
PID 4380 set thread context of 3228	4380	rYhL.exe	99
PID 4380 set thread context of 752	4380	rYhL.exe	102
PID 4380 set thread context of 624	4380	rYhL.exe	103
PID 4380 set thread context of 3760	4380	rYhL.exe	104

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1712	696	WerFault.exe	95

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	rYhL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rYhL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rYhL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rYhL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rYhL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rYhL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rYhL.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3228	rYhL.exe
3228	rYhL.exe
3760	rYhL.exe
3760	rYhL.exe
752	rYhL.exe
752	rYhL.exe
752	rYhL.exe
752	rYhL.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
4380	rYhL.exe
4380	rYhL.exe
4380	rYhL.exe
4380	rYhL.exe
4380	rYhL.exe
4380	rYhL.exe
4380	rYhL.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3228	rYhL.exe
Token: SeDebugPrivilege	3760	rYhL.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
696	rYhL.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4640 wrote to memory of 4380	4640	rYhL.exe	94
PID 4380 wrote to memory of 696	4380	rYhL.exe	95
PID 4380 wrote to memory of 696	4380	rYhL.exe	95
PID 4380 wrote to memory of 696	4380	rYhL.exe	95
PID 4380 wrote to memory of 696	4380	rYhL.exe	95
PID 4380 wrote to memory of 2596	4380	rYhL.exe	96
PID 4380 wrote to memory of 2596	4380	rYhL.exe	96
PID 4380 wrote to memory of 2596	4380	rYhL.exe	96
PID 4380 wrote to memory of 3620	4380	rYhL.exe	98
PID 4380 wrote to memory of 3620	4380	rYhL.exe	98
PID 4380 wrote to memory of 3620	4380	rYhL.exe	98
PID 4380 wrote to memory of 3620	4380	rYhL.exe	98
PID 4380 wrote to memory of 3228	4380	rYhL.exe	99
PID 4380 wrote to memory of 3228	4380	rYhL.exe	99
PID 4380 wrote to memory of 3228	4380	rYhL.exe	99
PID 4380 wrote to memory of 3228	4380	rYhL.exe	99
PID 4380 wrote to memory of 752	4380	rYhL.exe	102
PID 4380 wrote to memory of 752	4380	rYhL.exe	102
PID 4380 wrote to memory of 752	4380	rYhL.exe	102
PID 4380 wrote to memory of 752	4380	rYhL.exe	102
PID 4380 wrote to memory of 624	4380	rYhL.exe	103
PID 4380 wrote to memory of 624	4380	rYhL.exe	103
PID 4380 wrote to memory of 624	4380	rYhL.exe	103
PID 4380 wrote to memory of 624	4380	rYhL.exe	103
PID 4380 wrote to memory of 3760	4380	rYhL.exe	104
PID 4380 wrote to memory of 3760	4380	rYhL.exe	104
PID 4380 wrote to memory of 3760	4380	rYhL.exe	104
PID 4380 wrote to memory of 3760	4380	rYhL.exe	104

C:\Users\Admin\AppData\Local\Temp\rYhL.exe
"C:\Users\Admin\AppData\Local\Temp\rYhL.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4640
- C:\Users\Admin\AppData\Local\Temp\rYhL.exe
  "C:\Users\Admin\AppData\Local\Temp\rYhL.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4380
- - C:\Users\Admin\AppData\Local\Temp\rYhL.exe
    C:\Users\Admin\AppData\Local\Temp\rYhL.exe /stext "C:\Users\Admin\AppData\Local\Temp\zpqnveezgvbnrji"
    3⤵
    - Suspicious use of UnmapMainImage
    PID:696
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 696 -s 12
      4⤵
      Program crash
      PID:1712
- - C:\Users\Admin\AppData\Local\Temp\rYhL.exe
    C:\Users\Admin\AppData\Local\Temp\rYhL.exe /stext "C:\Users\Admin\AppData\Local\Temp\bjwfwwxtcdtsupeinpd"
    3⤵
    PID:2596
- - C:\Users\Admin\AppData\Local\Temp\rYhL.exe
    C:\Users\Admin\AppData\Local\Temp\rYhL.exe /stext "C:\Users\Admin\AppData\Local\Temp\bjwfwwxtcdtsupeinpd"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3620
- - C:\Users\Admin\AppData\Local\Temp\rYhL.exe
    C:\Users\Admin\AppData\Local\Temp\rYhL.exe /stext "C:\Users\Admin\AppData\Local\Temp\mdbywpiuqllxedsmwspmsj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3228
- - C:\Users\Admin\AppData\Local\Temp\rYhL.exe
    C:\Users\Admin\AppData\Local\Temp\rYhL.exe /stext "C:\Users\Admin\AppData\Local\Temp\qucaugfasphdsk"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:752
- - C:\Users\Admin\AppData\Local\Temp\rYhL.exe
    C:\Users\Admin\AppData\Local\Temp\rYhL.exe /stext "C:\Users\Admin\AppData\Local\Temp\tphtuypbfxzicqhiq"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:624
- - C:\Users\Admin\AppData\Local\Temp\rYhL.exe
    C:\Users\Admin\AppData\Local\Temp\rYhL.exe /stext "C:\Users\Admin\AppData\Local\Temp\drvlvravtgrmfwvmhkxc"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3760

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 696 -ip 696
1⤵
PID:3548

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

Replay Monitor

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Downloads

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

Filesize
4KB

MD5
18db1829b27eaeed163c211f5d179d72

SHA1
4442332494cba1e012f8876ecac42126ba995bc6

SHA256
610c5ee3f0e63441521d26bc477c9618a4c5f86e93d31b31890680c69e3ecc3d

SHA512
123d68b2c84f7a52d15faa212c06f33b04a55585e2aeb16bb14df95b18c0bcf31933e5bf0c736c90bc054b9527fccb046540d3302a0f149ebeed7c6bcca0b986

Download Submit
memory/624-47-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/624-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/696-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/752-51-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/752-46-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3228-38-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3228-30-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3228-33-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3228-35-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3228-37-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3620-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3620-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3620-31-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3620-36-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3620-34-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3760-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3760-49-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4380-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-61-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4380-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4380-60-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4380-57-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4640-1-0x0000000000880000-0x0000000000970000-memory.dmp

Filesize
960KB

Download
memory/4640-2-0x00000000058B0000-0x0000000005E54000-memory.dmp

Filesize
5.6MB

Download
memory/4640-0-0x00000000748CE000-0x00000000748CF000-memory.dmp

Filesize
4KB

Download
memory/4640-3-0x00000000053A0000-0x0000000005432000-memory.dmp

Filesize
584KB

Download
memory/4640-4-0x00000000748C0000-0x0000000075070000-memory.dmp

Filesize
7.7MB

Download
memory/4640-9-0x0000000006560000-0x0000000006620000-memory.dmp

Filesize
768KB

Download
memory/4640-6-0x0000000007FA0000-0x0000000007FB8000-memory.dmp

Filesize
96KB

Download
memory/4640-7-0x00000000748CE000-0x00000000748CF000-memory.dmp

Filesize
4KB

Download
memory/4640-8-0x00000000748C0000-0x0000000075070000-memory.dmp

Filesize
7.7MB

Download
memory/4640-5-0x0000000005480000-0x000000000548A000-memory.dmp

Filesize
40KB

Download
memory/4640-10-0x0000000006830000-0x00000000068CC000-memory.dmp

Filesize
624KB

Download
memory/4640-18-0x00000000748C0000-0x0000000075070000-memory.dmp

Filesize
7.7MB

Download