remcos | feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68

Analysis

max time kernel
148s
max time network
143s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
27-08-2024 07:06

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General

Target

feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe
Size

1.1MB
MD5

b35686fa66ee7d26fecb2073722fa3c8
SHA1

b53664dd6703e0b675022e47fb84deda47bb265e
SHA256

feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68
SHA512

13f49aee8d537d22a2335854fdf391e785084ae8c71ce6eb1ae0564827aaa2cf39adea4a36e9eba25abdb433d05148d462646e51e74efaddb30a43170447eb91
SSDEEP

24576:v8lDob4/clx6DpK4NszeTdNOHFIyzbdfylY6g5iKOP:uP0T+pbNmu0zBySV

Score

10^/10

remcos remotehost collection credential_access discovery rat 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 7 IoCs

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

resource	yara_rule
behavioral1/memory/1848-43-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1848-49-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2256-48-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2096-47-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2256-42-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1848-54-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2256-63-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2256-48-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2256-42-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2256-63-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1848-43-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1848-49-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1848-54-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3294248377-1418901787-4083263181-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	MSBuild.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2808 set thread context of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2300 set thread context of 1848	2300	MSBuild.exe	32
PID 2300 set thread context of 2256	2300	MSBuild.exe	33
PID 2300 set thread context of 2096	2300	MSBuild.exe	34

System Location Discovery: System Language Discovery 1 TTPs 5 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	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1848	MSBuild.exe
1848	MSBuild.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2300	MSBuild.exe
2300	MSBuild.exe
2300	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2096	MSBuild.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2808 wrote to memory of 2300	2808	feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe	30
PID 2300 wrote to memory of 1848	2300	MSBuild.exe	32
PID 2300 wrote to memory of 1848	2300	MSBuild.exe	32
PID 2300 wrote to memory of 1848	2300	MSBuild.exe	32
PID 2300 wrote to memory of 1848	2300	MSBuild.exe	32
PID 2300 wrote to memory of 1848	2300	MSBuild.exe	32
PID 2300 wrote to memory of 2256	2300	MSBuild.exe	33
PID 2300 wrote to memory of 2256	2300	MSBuild.exe	33
PID 2300 wrote to memory of 2256	2300	MSBuild.exe	33
PID 2300 wrote to memory of 2256	2300	MSBuild.exe	33
PID 2300 wrote to memory of 2256	2300	MSBuild.exe	33
PID 2300 wrote to memory of 2096	2300	MSBuild.exe	34
PID 2300 wrote to memory of 2096	2300	MSBuild.exe	34
PID 2300 wrote to memory of 2096	2300	MSBuild.exe	34
PID 2300 wrote to memory of 2096	2300	MSBuild.exe	34
PID 2300 wrote to memory of 2096	2300	MSBuild.exe	34

C:\Users\Admin\AppData\Local\Temp\feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe
"C:\Users\Admin\AppData\Local\Temp\feea277a6fb7ff78232d4e66eea9797d9f957c25eba535d05bbb16db537a8e68.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2300
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\rjsljoqtoxhpndqbxxncjlhakmc"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1848
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\umxejhbvcfzcprmfpiiduqbjtsuytad"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2256
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe /stext "C:\Users\Admin\AppData\Local\Temp\egcxkzmoqnrhzyajytuxxdwaczehuluplu"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2096

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

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/1848-49-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1848-34-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1848-54-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1848-43-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1848-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2096-46-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2096-44-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2096-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2096-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2256-37-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2256-48-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2256-42-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2256-40-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2256-63-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2300-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-18-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2300-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2300-57-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2300-60-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2300-61-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2808-2-0x0000000000480000-0x0000000000498000-memory.dmp

Filesize
96KB

Download
memory/2808-1-0x0000000000990000-0x0000000000AA6000-memory.dmp

Filesize
1.1MB

Download
memory/2808-3-0x00000000748F0000-0x0000000074FDE000-memory.dmp

Filesize
6.9MB

Download
memory/2808-4-0x00000000748FE000-0x00000000748FF000-memory.dmp

Filesize
4KB

Download
memory/2808-5-0x00000000748F0000-0x0000000074FDE000-memory.dmp

Filesize
6.9MB

Download
memory/2808-6-0x0000000004AE0000-0x0000000004BA0000-memory.dmp

Filesize
768KB

Download
memory/2808-0-0x00000000748FE000-0x00000000748FF000-memory.dmp

Filesize
4KB

Download
memory/2808-24-0x00000000748F0000-0x0000000074FDE000-memory.dmp

Filesize
6.9MB

Download