purecrypter | aed9dfb7ea1e556b7c3046fd5169d0e335ec18b1f59bc88b45b8b419c100fe87

Analysis

max time kernel
150s
max time network
152s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
06-02-2023 15:06

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General

Target

36fa8014af4492c716b6c183aa8bd2c3.exe
Size

6KB
MD5

36fa8014af4492c716b6c183aa8bd2c3
SHA1

a8b97702b4ca9c93a81c96701a477c78f73369f4
SHA256

aed9dfb7ea1e556b7c3046fd5169d0e335ec18b1f59bc88b45b8b419c100fe87
SHA512

0a69db5624f4ddfd26d275965302eb86ed5617f74ba55be9da58deef3170555170ad8c526babb4d5ef3f2c6841bf1c09cc37ac63c42f13b17b79888ce51c2362
SSDEEP

96:yHAusqedIuZaNFx0gS1dRJVRVD4ZLEaqrBtxkaEtdrKFnU:yHAuknJVUV/0BkN7/

Score

10^/10

purecrypter remcos subir-gente downloader loader rat

Malware Config

Extracted

Family

remcos

Botnet

SUBIR-GENTE

relocosrelocos.dyndns-at-home.com:3078

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-HXMVXC
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

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1432-56-0x0000000006B90000-0x0000000006E2C000-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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1432 set thread context of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31

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 4 IoCs

pid	Process
820	powershell.exe
1432	36fa8014af4492c716b6c183aa8bd2c3.exe
1432	36fa8014af4492c716b6c183aa8bd2c3.exe
1432	36fa8014af4492c716b6c183aa8bd2c3.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1432	36fa8014af4492c716b6c183aa8bd2c3.exe
Token: SeDebugPrivilege	820	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1588	InstallUtil.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1432 wrote to memory of 820	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	28
PID 1432 wrote to memory of 820	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	28
PID 1432 wrote to memory of 820	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	28
PID 1432 wrote to memory of 820	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	28
PID 1432 wrote to memory of 1704	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	30
PID 1432 wrote to memory of 1704	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	30
PID 1432 wrote to memory of 1704	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	30
PID 1432 wrote to memory of 1704	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	30
PID 1432 wrote to memory of 1704	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	30
PID 1432 wrote to memory of 1704	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	30
PID 1432 wrote to memory of 1704	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	30
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31
PID 1432 wrote to memory of 1588	1432	36fa8014af4492c716b6c183aa8bd2c3.exe	31

C:\Users\Admin\AppData\Local\Temp\36fa8014af4492c716b6c183aa8bd2c3.exe
"C:\Users\Admin\AppData\Local\Temp\36fa8014af4492c716b6c183aa8bd2c3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1432
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:820
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:1704
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:1588

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/820-59-0x000000006F3F0000-0x000000006F99B000-memory.dmp

Filesize
5.7MB

Download
memory/820-60-0x000000006F3F0000-0x000000006F99B000-memory.dmp

Filesize
5.7MB

Download
memory/820-61-0x000000006F3F0000-0x000000006F99B000-memory.dmp

Filesize
5.7MB

Download
memory/1432-54-0x0000000000DD0000-0x0000000000DD8000-memory.dmp

Filesize
32KB

Download
memory/1432-55-0x0000000076391000-0x0000000076393000-memory.dmp

Filesize
8KB

Download
memory/1432-56-0x0000000006B90000-0x0000000006E2C000-memory.dmp

Filesize
2.6MB

Download
memory/1432-62-0x00000000052C0000-0x0000000005340000-memory.dmp

Filesize
512KB

Download
memory/1588-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-70-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1588-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download