remcos | aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15

General

Target

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe
Size

1.9MB
MD5

da104509d31179c8b183b72ab096b9c2
SHA1

71bdec8e589a0af4823c87a7f3fb2158f5ec33a5
SHA256

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15
SHA512

da9516b3a4bcefba6d82f6f1f07dd4a4a9a2f3a92cb021c03093b8ba4e71c8536a7229fbe25909c1020818e8adaf9711f6a3b42ae67d6c436ab7af1351daee85
SSDEEP

49152:VnMA5X2hFShTVb+JzPPBsJnEPsn6wzJtvwSHgG+GMj8l:aA5mLQxyBsusnnvwYKj

Score

10^/10

remcos ms-office discovery evasion rat

Malware Config

Extracted

Family

remcos

Botnet

ms-office

C2

ms-office.duckdns.org:39438

ms-office1.duckdns.org:39439

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-MXJN22
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
Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Wine	aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

pid process

3604 aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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

Processes:

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

pid	process
3604	aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe
3604	aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

pid process

3604 aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe

C:\Users\Admin\AppData\Local\Temp\aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe
"C:\Users\Admin\AppData\Local\Temp\aa2318e3a9dfae87aedfe3663748fd2968ed9d0c6cb8497c756f16ad1e579b15.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:3604

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
a7c17c3627e6c8a6f21958bb67111207

SHA1
3100d4e7307d740095e66afe6404939d8cccda3e

SHA256
0f3b153fe03af33b49878b65e7c4af34ccdec1802db7722c3a7baff54f14492f

SHA512
ad59c00bb7595c9c070cee767cbbfe315c76e1589cea8f1c6e9b008e25ef240976ad76b5263197815f0192b8b301246423f0cd69feb23712d046b157ad680a45

Download Submit
memory/3604-14-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-3-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-1-0x0000000077C94000-0x0000000077C96000-memory.dmp

Filesize
8KB

Download
memory/3604-19-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-5-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-7-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-8-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-9-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-10-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-12-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-13-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-0-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-52-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-2-0x0000000000401000-0x000000000043C000-memory.dmp

Filesize
236KB

Download
memory/3604-4-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-22-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-26-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-29-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-31-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-34-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-37-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-40-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-43-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-46-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-49-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download
memory/3604-16-0x0000000000400000-0x00000000008D0000-memory.dmp

Filesize
4.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads