remcos | f851ccd89ef8f8e28648ff600789364e9caf5c522a5e7238cee619a229cc821d

General

Target

RFQ 2290.exe
Size

1.3MB
MD5

85e8ae98556d7927fa40c5cba4e4a16a
SHA1

3013724dbc0bedda4bc2528ba01c7495f26614b1
SHA256

f851ccd89ef8f8e28648ff600789364e9caf5c522a5e7238cee619a229cc821d
SHA512

25e6158d69a61945d1513d0a12ffe1d1178a5c9e2ffeb032791b2dadc294d4f1e6b4d73242183b1ce0059e7421c9a9eea62cca6a3683002ee841e42cedce9969
SSDEEP

24576:WqHo1sfbYnNTHIsxcb5V9zpn8jte3q/3uASeA8vOE/dkJw1:WqIafENUkcb5rpn8Y3q/eAYU

Score

10^/10

remcos new rem stub evasion rat

Malware Config

Extracted

Family

remcos

Botnet

NEW REM STUB

C2

valvesco.duckdns.org:5050

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-48V73L
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

RFQ 2290.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions RFQ 2290.exe
Looks for VMWare Tools registry key 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

RFQ 2290.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools RFQ 2290.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	RFQ 2290.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	RFQ 2290.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:

RFQ 2290.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	RFQ 2290.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	RFQ 2290.exe

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

RFQ 2290.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation RFQ 2290.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	RFQ 2290.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

RFQ 2290.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	RFQ 2290.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	RFQ 2290.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

RFQ 2290.exe

description pid process target process

PID 1792 set thread context of 1476 1792 RFQ 2290.exe RFQ 2290.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

3316 schtasks.exe
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

RFQ 2290.exepowershell.exepowershell.exe

pid process

1792 RFQ 2290.exe
2680 powershell.exe
1792 RFQ 2290.exe
5116 powershell.exe
1792 RFQ 2290.exe
2680 powershell.exe
5116 powershell.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

RFQ 2290.exepowershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1792 RFQ 2290.exe
Token: SeDebugPrivilege 2680 powershell.exe
Token: SeDebugPrivilege 5116 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RFQ 2290.exe

pid process

1476 RFQ 2290.exe

description	pid	process	target process
PID 1792 set thread context of 1476	1792	RFQ 2290.exe	RFQ 2290.exe

pid	process
3316	schtasks.exe

pid	process
1792	RFQ 2290.exe
2680	powershell.exe
1792	RFQ 2290.exe
5116	powershell.exe
1792	RFQ 2290.exe
2680	powershell.exe
5116	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1792	RFQ 2290.exe
Token: SeDebugPrivilege	2680	powershell.exe
Token: SeDebugPrivilege	5116	powershell.exe

pid	process
1476	RFQ 2290.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

RFQ 2290.exe

description	pid	process	target process
PID 1792 wrote to memory of 2680	1792	RFQ 2290.exe	powershell.exe
PID 1792 wrote to memory of 2680	1792	RFQ 2290.exe	powershell.exe
PID 1792 wrote to memory of 2680	1792	RFQ 2290.exe	powershell.exe
PID 1792 wrote to memory of 5116	1792	RFQ 2290.exe	powershell.exe
PID 1792 wrote to memory of 5116	1792	RFQ 2290.exe	powershell.exe
PID 1792 wrote to memory of 5116	1792	RFQ 2290.exe	powershell.exe
PID 1792 wrote to memory of 3316	1792	RFQ 2290.exe	schtasks.exe
PID 1792 wrote to memory of 3316	1792	RFQ 2290.exe	schtasks.exe
PID 1792 wrote to memory of 3316	1792	RFQ 2290.exe	schtasks.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe
PID 1792 wrote to memory of 1476	1792	RFQ 2290.exe	RFQ 2290.exe

C:\Users\Admin\AppData\Local\Temp\RFQ 2290.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ 2290.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1792

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\RFQ 2290.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2680

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\iDKZenUzizmrGT.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:5116

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\iDKZenUzizmrGT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7B0C.tmp"
2⤵
- Creates scheduled task(s)
PID:3316

C:\Users\Admin\AppData\Local\Temp\RFQ 2290.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ 2290.exe"
2⤵
- Suspicious use of SetWindowsHookEx
PID:1476

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

5

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

4

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7B0C.tmp
Filesize
1KB

MD5
d6528b9c8f29717f2d1b278dd6487525

SHA1
16086cb72525fa7dce1a43f76d3332faab4293dc

SHA256
5148da4c4417734854ab2e4a965f76844923b9638e5fe68579e6cce660ab30c0

SHA512
592c48502604875cab195dac7df6aa32e5d33ba1c60d81cb720fffc099fadeeabb0fb240608a8b8fe2937af7db84b1c18b362601cd6732e60a2e755d7a41a70b

Download Submit
memory/1476-149-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1476-163-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1476-151-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1476-148-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1476-147-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1476-146-0x0000000000000000-mapping.dmp

Download
memory/1792-134-0x0000000005420000-0x00000000054B2000-memory.dmp

Filesize
584KB

Download
memory/1792-135-0x0000000005390000-0x000000000539A000-memory.dmp

Filesize
40KB

Download
memory/1792-136-0x0000000009580000-0x000000000961C000-memory.dmp

Filesize
624KB

Download
memory/1792-137-0x00000000098C0000-0x0000000009926000-memory.dmp

Filesize
408KB

Download
memory/1792-132-0x0000000000890000-0x00000000009E8000-memory.dmp

Filesize
1.3MB

Download
memory/1792-133-0x00000000059D0000-0x0000000005F74000-memory.dmp

Filesize
5.6MB

Download
memory/2680-140-0x0000000005280000-0x00000000058A8000-memory.dmp

Filesize
6.2MB

Download
memory/2680-153-0x00000000712A0000-0x00000000712EC000-memory.dmp

Filesize
304KB

Download
memory/2680-138-0x0000000000000000-mapping.dmp

Download
memory/2680-142-0x0000000005060000-0x0000000005082000-memory.dmp

Filesize
136KB

Download
memory/2680-162-0x0000000007640000-0x0000000007648000-memory.dmp

Filesize
32KB

Download
memory/2680-150-0x0000000006020000-0x000000000603E000-memory.dmp

Filesize
120KB

Download
memory/2680-139-0x00000000026E0000-0x0000000002716000-memory.dmp

Filesize
216KB

Download
memory/2680-159-0x00000000075A0000-0x0000000007636000-memory.dmp

Filesize
600KB

Download
memory/2680-158-0x00000000073A0000-0x00000000073AA000-memory.dmp

Filesize
40KB

Download
memory/2680-144-0x0000000005100000-0x0000000005166000-memory.dmp

Filesize
408KB

Download
memory/2680-155-0x00000000065C0000-0x00000000065DE000-memory.dmp

Filesize
120KB

Download
memory/2680-156-0x0000000007980000-0x0000000007FFA000-memory.dmp

Filesize
6.5MB

Download
memory/3316-143-0x0000000000000000-mapping.dmp

Download
memory/5116-157-0x00000000073F0000-0x000000000740A000-memory.dmp

Filesize
104KB

Download
memory/5116-154-0x00000000712A0000-0x00000000712EC000-memory.dmp

Filesize
304KB

Download
memory/5116-152-0x00000000066F0000-0x0000000006722000-memory.dmp

Filesize
200KB

Download
memory/5116-160-0x0000000007620000-0x000000000762E000-memory.dmp

Filesize
56KB

Download
memory/5116-161-0x0000000007730000-0x000000000774A000-memory.dmp

Filesize
104KB

Download
memory/5116-141-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads