remcos | 6201c84444a1047e33e7ce68bf998d9470b950f76ec919322c1f24c865ba547d

General

Target

New Order # 8558497.exe
Size

395KB
MD5

1bb8ba2c732f0401a2b2fb80c546ae29
SHA1

4db89e355f30bede562ee9959ce662a06ac7475e
SHA256

a006ce3d5e86dac171acaeac9ffeab9172a5ff4daceca820df5d05f87f0cf6ff
SHA512

3664c862ca54341ef530eabcb26ee84739a9fdbd3de252421fb9c67b6b0d9d5acc562c968d49d4ee66df3e2b4412368b641eb6ff671280beae06741bb1960eed

Score

10^/10

remcos remotehost rat

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

RemoteHost

C2

dolxxrem.hopto.org:3086

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-B3XNCF
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
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

CoreCCC Packer 1 IoCs

Detects CoreCCC packer used to load .NET malware.

Processes:

resource	yara_rule
behavioral2/memory/4144-130-0x00000000003B0000-0x0000000000418000-memory.dmp	coreccc

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:

New Order # 8558497.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	New Order # 8558497.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

New Order # 8558497.exe

description pid process target process

PID 4144 set thread context of 4252 4144 New Order # 8558497.exe vbc.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

4316 schtasks.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

4252 vbc.exe

description	pid	process	target process
PID 4144 set thread context of 4252	4144	New Order # 8558497.exe	vbc.exe

pid	process
4316	schtasks.exe

pid	process
4252	vbc.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

New Order # 8558497.exe

description	pid	process	target process
PID 4144 wrote to memory of 4316	4144	New Order # 8558497.exe	schtasks.exe
PID 4144 wrote to memory of 4316	4144	New Order # 8558497.exe	schtasks.exe
PID 4144 wrote to memory of 4316	4144	New Order # 8558497.exe	schtasks.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe
PID 4144 wrote to memory of 4252	4144	New Order # 8558497.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\New Order # 8558497.exe
"C:\Users\Admin\AppData\Local\Temp\New Order # 8558497.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4144

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HLCfWZiFHTlZm" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1414.tmp"
2⤵
- Creates scheduled task(s)
PID:4316

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
2⤵
- Suspicious use of SetWindowsHookEx
PID:4252

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1414.tmp
Filesize
1KB

MD5
4370bd90c6d8eb4677d1336ee9ace379

SHA1
a4db9d659f7f22f28ff58b1000f451d4bcfb4df1

SHA256
e20fb839f38ae545ed3269f1f86d3653066bf6cb38d9c972afc3f5b9c84ae7ad

SHA512
4087bceda5c0c57ffb3ccf4f2f2534750ae318c847115bb0062c1e9915930c33eabe62c5754c3e71f6938239e92fbe7e0a654ad2fde689ce37ae25b41063446c

Download Submit
memory/4144-130-0x00000000003B0000-0x0000000000418000-memory.dmp

Filesize
416KB

Download
memory/4144-131-0x0000000005470000-0x0000000005A14000-memory.dmp

Filesize
5.6MB

Download
memory/4144-132-0x0000000004DB0000-0x0000000004E42000-memory.dmp

Filesize
584KB

Download
memory/4144-133-0x0000000004E50000-0x0000000004E5A000-memory.dmp

Filesize
40KB

Download
memory/4144-134-0x0000000007290000-0x000000000732C000-memory.dmp

Filesize
624KB

Download
memory/4252-137-0x0000000000000000-mapping.dmp

Download
memory/4252-138-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4252-140-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4252-141-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4316-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads