remcos | b2cfbcebd445e279de69ffa4169f678dda459b3ef194070a7ea3fd1ecf82f40e

Analysis

max time kernel
153s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
09/08/2022, 12:28

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General

Target
RFQ-2022080902401220JP.exe
Size 11KB
Sample220809-pnbgtsbhc4
SHA256 b2cfbcebd445e279de69ffa4169f678dda459b3ef194070a7ea3fd1ecf82f40e
MD5 b904f6a4b02be56ab504a10cbf6a5af1
SHA1 679163ec665252c72dd90b8c198cfad8c964cde2
SHA512 3ea3a4c17d048e55feeb9f14b6ea6557040e7e1acb08a8036f0c7b2dc06551e06a7e32d82457259da853bdcda26e30b2ba2dda53a056fdcfa4ac707aa5965d69
MD5 SHA1 SHA512

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

obologs.work.gd:4044

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-5Y5EWD
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

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Control Panel\International\Geo\Nation	RFQ-2022080902401220JP.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Hamczwmly = "\"C:\\Users\\Admin\\AppData\\Roaming\\Cyoca\\Hamczwmly.exe\""	RFQ-2022080902401220JP.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4284 set thread context of 3528	4284	RFQ-2022080902401220JP.exe	91

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4560	powershell.exe
4560	powershell.exe
4284	RFQ-2022080902401220JP.exe
4284	RFQ-2022080902401220JP.exe
4284	RFQ-2022080902401220JP.exe
4284	RFQ-2022080902401220JP.exe
4284	RFQ-2022080902401220JP.exe
4284	RFQ-2022080902401220JP.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4284	RFQ-2022080902401220JP.exe
Token: SeDebugPrivilege	4560	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4284 wrote to memory of 4560	4284	RFQ-2022080902401220JP.exe	83
PID 4284 wrote to memory of 4560	4284	RFQ-2022080902401220JP.exe	83
PID 4284 wrote to memory of 4560	4284	RFQ-2022080902401220JP.exe	83
PID 4284 wrote to memory of 3640	4284	RFQ-2022080902401220JP.exe	90
PID 4284 wrote to memory of 3640	4284	RFQ-2022080902401220JP.exe	90
PID 4284 wrote to memory of 3640	4284	RFQ-2022080902401220JP.exe	90
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91
PID 4284 wrote to memory of 3528	4284	RFQ-2022080902401220JP.exe	91

C:\Users\Admin\AppData\Local\Temp\RFQ-2022080902401220JP.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ-2022080902401220JP.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4284
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4560
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  2⤵
  PID:3640
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  2⤵
  PID:3528

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3528-146-0x0000000000400000-0x000000000047E000-memory.dmp

Download

memory/3528-145-0x0000000000400000-0x000000000047E000-memory.dmp

Download

memory/3528-144-0x0000000000400000-0x000000000047E000-memory.dmp

Download

memory/3528-143-0x0000000000400000-0x000000000047E000-memory.dmp

Download

memory/3528-142-0x0000000000400000-0x000000000047E000-memory.dmp

Download

memory/4284-131-0x0000000006DD0000-0x0000000006DF2000-memory.dmp

Download

memory/4284-130-0x0000000000940000-0x0000000000948000-memory.dmp

Download

memory/4560-134-0x0000000004F30000-0x0000000005558000-memory.dmp

Download

memory/4560-139-0x0000000006150000-0x000000000616A000-memory.dmp

Download

memory/4560-138-0x00000000074B0000-0x0000000007B2A000-memory.dmp

Download

memory/4560-137-0x0000000005C40000-0x0000000005C5E000-memory.dmp

Download

memory/4560-136-0x00000000055D0000-0x0000000005636000-memory.dmp

Download

memory/4560-135-0x0000000005560000-0x00000000055C6000-memory.dmp

Download

memory/4560-133-0x0000000002650000-0x0000000002686000-memory.dmp

Download