purecrypter | 1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd

General

Target

1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
Size

531KB
MD5

1892b02189311ec4eaa6fe27df2ff812
SHA1

d307df371319b316a3b1f70d62dfcaaf2d201dfd
SHA256

1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd
SHA512

12d9890ffb6d35d2703bed448cf83bd08bac348bb3a20afda6e971190c7ddfc7fed5ff9a50d363bbb75ac369235e1e569a738a1d44ff8024937f6b04e449de28
SSDEEP

12288:lPdrsWz1gSPZirKzM2WZP3IJvpNoBKupPJgJWp:llhRxiIW13TV8

Score

10^/10

purecrypter remcos remotehost downloader loader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

79.134.225.7:2050

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
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-TTGDBF
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
notepad;solitaire;

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/2960-5-0x00000000002E0000-0x0000000000364000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 1 IoCs

Processes:

remcos.exe

pid process

328 remcos.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

772 cmd.exe

pid	process
328	remcos.exe

pid	process
772	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000\Software\Microsoft\Windows\CurrentVersion\Run\huss = "\"C:\\Users\\Admin\\AppData\\Local\\huss.exe\""	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1658372521-4246568289-2509113762-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe

description	pid	process	target process
PID 2960 set thread context of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe

pid process

2960 1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe

pid	process
2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exeremcos.exe

description	pid	process
Token: SeDebugPrivilege	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
Token: SeDebugPrivilege	328	remcos.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exeWScript.execmd.exe

description	pid	process	target process
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2960 wrote to memory of 2508	2960	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
PID 2508 wrote to memory of 544	2508	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	WScript.exe
PID 2508 wrote to memory of 544	2508	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	WScript.exe
PID 2508 wrote to memory of 544	2508	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	WScript.exe
PID 2508 wrote to memory of 544	2508	1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe	WScript.exe
PID 544 wrote to memory of 772	544	WScript.exe	cmd.exe
PID 544 wrote to memory of 772	544	WScript.exe	cmd.exe
PID 544 wrote to memory of 772	544	WScript.exe	cmd.exe
PID 544 wrote to memory of 772	544	WScript.exe	cmd.exe
PID 772 wrote to memory of 328	772	cmd.exe	remcos.exe
PID 772 wrote to memory of 328	772	cmd.exe	remcos.exe
PID 772 wrote to memory of 328	772	cmd.exe	remcos.exe
PID 772 wrote to memory of 328	772	cmd.exe	remcos.exe

C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
"C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2960

C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
C:\Users\Admin\AppData\Local\Temp\1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd.exe
2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2508

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:544

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:772

C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
5⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
418B

MD5
b92d64fe5b1d1f59df4b738262aea8df

SHA1
c8fb1981759c2d9bb2ec91b705985fba5fc7af63

SHA256
fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

SHA512
2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe

Filesize
531KB

MD5
1892b02189311ec4eaa6fe27df2ff812

SHA1
d307df371319b316a3b1f70d62dfcaaf2d201dfd

SHA256
1d7b8253666eb3d60b84a82999d6a9f393fee01876ff6f39dee4bdf304a11bfd

SHA512
12d9890ffb6d35d2703bed448cf83bd08bac348bb3a20afda6e971190c7ddfc7fed5ff9a50d363bbb75ac369235e1e569a738a1d44ff8024937f6b04e449de28

Download Submit
memory/328-36-0x0000000074800000-0x0000000074EEE000-memory.dmp

Filesize
6.9MB

Download
memory/328-35-0x00000000042E0000-0x0000000004320000-memory.dmp

Filesize
256KB

Download
memory/328-33-0x00000000008F0000-0x000000000097A000-memory.dmp

Filesize
552KB

Download
memory/328-34-0x0000000074800000-0x0000000074EEE000-memory.dmp

Filesize
6.9MB

Download
memory/2508-28-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-19-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-9-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-10-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-11-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-12-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-13-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-14-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-15-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-16-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2508-25-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2508-21-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/2960-22-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2960-7-0x0000000000730000-0x000000000077C000-memory.dmp

Filesize
304KB

Download
memory/2960-0-0x0000000000E20000-0x0000000000EAA000-memory.dmp

Filesize
552KB

Download
memory/2960-6-0x0000000000DA0000-0x0000000000E0A000-memory.dmp

Filesize
424KB

Download
memory/2960-5-0x00000000002E0000-0x0000000000364000-memory.dmp

Filesize
528KB

Download
memory/2960-4-0x0000000004F50000-0x0000000004F90000-memory.dmp

Filesize
256KB

Download
memory/2960-3-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2960-2-0x0000000004F50000-0x0000000004F90000-memory.dmp

Filesize
256KB

Download
memory/2960-1-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads