remcos | 99bcee03cdb32c2bcf607b82e750d90ee4c0ca9e37f784ca4cd3e4b888977e58

Analysis

max time kernel
118s
max time network
116s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
19/08/2024, 11:23

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General

Target

e309d1d65510a23a42802d4fefe26620N.exe
Size

874KB
MD5

e309d1d65510a23a42802d4fefe26620
SHA1

07c0d5f0ae07a6ee4c039050f8c26beb6216419b
SHA256

99bcee03cdb32c2bcf607b82e750d90ee4c0ca9e37f784ca4cd3e4b888977e58
SHA512

31f5e77bf4a35e76c6b5328c5ad3c540c64df74b48ce7954118c728e52ae069fb3fca17ac8b2c83624fd528702772450781d013df91f8d0b67e93c2131b6db87
SSDEEP

24576:KBXu9HGaVHjdjRxKPzRkRYoNjRCLOU/vh37:Kw9VHjdtxKrRkZNIOUnh

Score

10^/10

remcos remotehost collection credential_access discovery rat stealer upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

194.169.175.190:2404

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-LBZ2BK
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 8 IoCs

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

resource	yara_rule
behavioral2/memory/2560-37-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2560-40-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1460-39-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/5032-38-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1460-34-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/5032-32-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2560-44-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1460-46-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5032-38-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/5032-32-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1460-39-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1460-34-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/1460-46-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4232-0-0x0000000000910000-0x0000000000AF2000-memory.dmp	upx
behavioral2/memory/4232-16-0x0000000000910000-0x0000000000AF2000-memory.dmp	upx

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	svchost.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4232-16-0x0000000000910000-0x0000000000AF2000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4232 set thread context of 1768	4232	e309d1d65510a23a42802d4fefe26620N.exe	89
PID 1768 set thread context of 1460	1768	svchost.exe	95
PID 1768 set thread context of 5032	1768	svchost.exe	97
PID 1768 set thread context of 2560	1768	svchost.exe	98

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	e309d1d65510a23a42802d4fefe26620N.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
1460	svchost.exe
1460	svchost.exe
2560	svchost.exe
2560	svchost.exe
1460	svchost.exe
1460	svchost.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4232	e309d1d65510a23a42802d4fefe26620N.exe
1768	svchost.exe
1768	svchost.exe
1768	svchost.exe
1768	svchost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2560	svchost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4232	e309d1d65510a23a42802d4fefe26620N.exe
4232	e309d1d65510a23a42802d4fefe26620N.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4232	e309d1d65510a23a42802d4fefe26620N.exe
4232	e309d1d65510a23a42802d4fefe26620N.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4232 wrote to memory of 1768	4232	e309d1d65510a23a42802d4fefe26620N.exe	89
PID 4232 wrote to memory of 1768	4232	e309d1d65510a23a42802d4fefe26620N.exe	89
PID 4232 wrote to memory of 1768	4232	e309d1d65510a23a42802d4fefe26620N.exe	89
PID 4232 wrote to memory of 1768	4232	e309d1d65510a23a42802d4fefe26620N.exe	89
PID 1768 wrote to memory of 1460	1768	svchost.exe	95
PID 1768 wrote to memory of 1460	1768	svchost.exe	95
PID 1768 wrote to memory of 1460	1768	svchost.exe	95
PID 1768 wrote to memory of 1460	1768	svchost.exe	95
PID 1768 wrote to memory of 2952	1768	svchost.exe	96
PID 1768 wrote to memory of 2952	1768	svchost.exe	96
PID 1768 wrote to memory of 2952	1768	svchost.exe	96
PID 1768 wrote to memory of 5032	1768	svchost.exe	97
PID 1768 wrote to memory of 5032	1768	svchost.exe	97
PID 1768 wrote to memory of 5032	1768	svchost.exe	97
PID 1768 wrote to memory of 5032	1768	svchost.exe	97
PID 1768 wrote to memory of 2560	1768	svchost.exe	98
PID 1768 wrote to memory of 2560	1768	svchost.exe	98
PID 1768 wrote to memory of 2560	1768	svchost.exe	98
PID 1768 wrote to memory of 2560	1768	svchost.exe	98

C:\Users\Admin\AppData\Local\Temp\e309d1d65510a23a42802d4fefe26620N.exe
"C:\Users\Admin\AppData\Local\Temp\e309d1d65510a23a42802d4fefe26620N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4232
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\e309d1d65510a23a42802d4fefe26620N.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\aqjx"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1460
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ksoqoyz"
    3⤵
    PID:2952
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ksoqoyz"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:5032
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\SysWOW64\svchost.exe /stext "C:\Users\Admin\AppData\Local\Temp\nmuaprkclr"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2560

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\aqjx

Filesize
4KB

MD5
2538ec9e8425a905937573069b77d4c2

SHA1
ad0c2b7aff4382e23444d26adac96d9697b849f3

SHA256
29338949fae4c88a972837aae898529e4c7a2c4df35982eef2f8d7b602c17f4e

SHA512
a867a471b837b9c662528ee7a5904e8fe7b1eebb277b8a7fe4d4caf423fae914baf692bb5004c02ddb539b157d63326178467e28b03aa92a533cda19155d501c

Download Submit
memory/1460-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1460-46-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1460-34-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1460-39-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1460-31-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1768-52-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1768-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-21-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-51-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1768-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1768-48-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2560-33-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2560-44-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2560-36-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2560-40-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2560-37-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4232-0-0x0000000000910000-0x0000000000AF2000-memory.dmp

Filesize
1.9MB

Download
memory/4232-12-0x00000000008F0000-0x00000000008F4000-memory.dmp

Filesize
16KB

Download
memory/4232-16-0x0000000000910000-0x0000000000AF2000-memory.dmp

Filesize
1.9MB

Download
memory/5032-30-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5032-32-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5032-38-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5032-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download