remcos | 90f752930ccd1f6ae8292480b705f65f0ef2e70407b3db489651822ea1349f9f

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
19-05-2023 16:09

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General

Target

a98a545874c06efde00c0c2a54c4e503.exe
Size

1.3MB
MD5

a98a545874c06efde00c0c2a54c4e503
SHA1

a35e935da33a72622e6da3507a1cab3e6aea3347
SHA256

90f752930ccd1f6ae8292480b705f65f0ef2e70407b3db489651822ea1349f9f
SHA512

bc6b7c9007d16ae46d8d6a8508325d43b9f2a1c3c40df5424427a2207f6618f0b27d86eaef5b5571c70360d7d3891903d9b734c3774ff3ca28ed84715854cb50
SSDEEP

24576:BSCeIM5/f84n0Gz39WPLZuMRau+5IrtXOplftVBUlK15jDLbO7eyV:zvMFf84r9EoMfk0OjfDL67eI

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

top.noneabuse01.xyz:2070

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-3J1W3R
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

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\msbuld.exe\","	a98a545874c06efde00c0c2a54c4e503.exe

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1588 set thread context of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
668	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	668	powershell.exe
Token: SeDebugPrivilege	1588	a98a545874c06efde00c0c2a54c4e503.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1940	a98a545874c06efde00c0c2a54c4e503.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1588 wrote to memory of 668	1588	a98a545874c06efde00c0c2a54c4e503.exe	26
PID 1588 wrote to memory of 668	1588	a98a545874c06efde00c0c2a54c4e503.exe	26
PID 1588 wrote to memory of 668	1588	a98a545874c06efde00c0c2a54c4e503.exe	26
PID 1588 wrote to memory of 668	1588	a98a545874c06efde00c0c2a54c4e503.exe	26
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28
PID 1588 wrote to memory of 1940	1588	a98a545874c06efde00c0c2a54c4e503.exe	28

C:\Users\Admin\AppData\Local\Temp\a98a545874c06efde00c0c2a54c4e503.exe
"C:\Users\Admin\AppData\Local\Temp\a98a545874c06efde00c0c2a54c4e503.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1588
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMQA1AA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:668
- C:\Users\Admin\AppData\Local\Temp\a98a545874c06efde00c0c2a54c4e503.exe
  C:\Users\Admin\AppData\Local\Temp\a98a545874c06efde00c0c2a54c4e503.exe
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:1940

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
f5fa75069fff8a93f7dee29adc5683fb

SHA1
8329599b71042dbe419bf2c7182be43d62d29b17

SHA256
14565248327d916ee2ea28e8e3d423860ec07ad5a11c8de2f9ae7611dfd7bc32

SHA512
bdd7a0a5998a76d780553fb29ba277ea46589feb79d1a584c36849b46290ee429dfef7e79d64bba68ef55699e0133300376e56607c56c8e399de1490656a13b3

Download Submit
memory/668-61-0x0000000002070000-0x00000000020B0000-memory.dmp

Filesize
256KB

Download
memory/668-62-0x0000000002070000-0x00000000020B0000-memory.dmp

Filesize
256KB

Download
memory/668-64-0x0000000002070000-0x00000000020B0000-memory.dmp

Filesize
256KB

Download
memory/1588-54-0x0000000001040000-0x00000000011A0000-memory.dmp

Filesize
1.4MB

Download
memory/1588-55-0x0000000000DB0000-0x0000000000DF0000-memory.dmp

Filesize
256KB

Download
memory/1588-56-0x0000000005060000-0x000000000514C000-memory.dmp

Filesize
944KB

Download
memory/1588-57-0x0000000000570000-0x00000000005B8000-memory.dmp

Filesize
288KB

Download
memory/1588-58-0x0000000004EA0000-0x0000000004F32000-memory.dmp

Filesize
584KB

Download
memory/1588-63-0x0000000000DB0000-0x0000000000DF0000-memory.dmp

Filesize
256KB

Download
memory/1940-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-67-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-68-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-69-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-70-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-72-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-73-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-74-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1940-75-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-77-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-78-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-80-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-81-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-82-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-83-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-84-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-85-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-86-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-88-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-89-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-90-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-92-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-93-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-94-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-95-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-96-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-98-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-99-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-100-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-102-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-103-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-104-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-106-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-107-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-108-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-110-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-111-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-112-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-113-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-115-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-116-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-117-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-118-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-120-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-121-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-122-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-124-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-125-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-126-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-127-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-129-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-130-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-131-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-133-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-134-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-135-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-136-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-138-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-139-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-140-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-141-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-143-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1940-144-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download