purecrypter | 53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
03-02-2023 19:31

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General

Target

d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Size

7KB
MD5

b359f4af5c88b1e237db9738415b7682
SHA1

d7fa6d87594ea4d8b5740d54fdc204b08f4e9439
SHA256

53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd
SHA512

6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb
SSDEEP

96:xtEsKVeCVIP7bLp8LAn5c8aY1ej/kKV+J2qzNt:xUVVIP7bLrEOejcKYx

Score

10^/10

purecrypter remcos remotehost downloader loader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

194.180.49.17:28282

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
rdfghfgjkgoighjc.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-PC1DJ2
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/832-56-0x00000000072E0000-0x000000000757E000-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 3 IoCs

pid	Process
616	rdfghfgjkgoighjc.exe
1872	rdfghfgjkgoighjc.exe
1780	rdfghfgjkgoighjc.exe

Loads dropped DLL 1 IoCs

pid	Process
1856	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe

Adds Run key to start application 2 TTPs 10 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	rdfghfgjkgoighjc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	rdfghfgjkgoighjc.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Phecxlkxbf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zwpfblvosjv\\Phecxlkxbf.exe\""	rdfghfgjkgoighjc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Phecxlkxbf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zwpfblvosjv\\Phecxlkxbf.exe\""	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	rdfghfgjkgoighjc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	rdfghfgjkgoighjc.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 832 set thread context of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 616 set thread context of 1780	616	rdfghfgjkgoighjc.exe	35

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 3 IoCs

pid	Process
724	powershell.exe
1520	powershell.exe
616	rdfghfgjkgoighjc.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Token: SeDebugPrivilege	724	powershell.exe
Token: SeDebugPrivilege	616	rdfghfgjkgoighjc.exe
Token: SeDebugPrivilege	1520	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1780	rdfghfgjkgoighjc.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 832 wrote to memory of 724	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 832 wrote to memory of 724	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 832 wrote to memory of 724	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 832 wrote to memory of 724	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 832 wrote to memory of 1856	832	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 1856 wrote to memory of 616	1856	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1856 wrote to memory of 616	1856	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1856 wrote to memory of 616	1856	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1856 wrote to memory of 616	1856	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 616 wrote to memory of 1520	616	rdfghfgjkgoighjc.exe	32
PID 616 wrote to memory of 1520	616	rdfghfgjkgoighjc.exe	32
PID 616 wrote to memory of 1520	616	rdfghfgjkgoighjc.exe	32
PID 616 wrote to memory of 1520	616	rdfghfgjkgoighjc.exe	32
PID 616 wrote to memory of 1872	616	rdfghfgjkgoighjc.exe	34
PID 616 wrote to memory of 1872	616	rdfghfgjkgoighjc.exe	34
PID 616 wrote to memory of 1872	616	rdfghfgjkgoighjc.exe	34
PID 616 wrote to memory of 1872	616	rdfghfgjkgoighjc.exe	34
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35
PID 616 wrote to memory of 1780	616	rdfghfgjkgoighjc.exe	35

C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
"C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:832
- 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:724
- C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1856
- - C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    "C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:616
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1520
  - - C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      4⤵
      Executes dropped EXE
      PID:1872
  - - C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:1780

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
efc74cd16896312b9f85f53da3f2fee2

SHA1
93500f4befd51597d11fd7e72d3ec8e9a6c5c2d4

SHA256
692cf64f3772573870ce569f0b537f06bd79da2ec3d09d8c28bd8a11898474de

SHA512
2e148bbf26d21282d313c78041f404ab56ca8bafbab0d0b105e553db13522f5aec2ad51700ca8db1177df5e98276b5ee5d03ac1ba58ceed7ec99a0f032eb7ff8

Download Submit
C:\Users\Admin\AppData\Roaming\Zwpfblvosjv\Phecxlkxbf.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
memory/616-85-0x00000000000C0000-0x00000000000C8000-memory.dmp

Filesize
32KB

Download
memory/724-61-0x000000006FB70000-0x000000007011B000-memory.dmp

Filesize
5.7MB

Download
memory/724-60-0x000000006FB70000-0x000000007011B000-memory.dmp

Filesize
5.7MB

Download
memory/724-59-0x000000006FB70000-0x000000007011B000-memory.dmp

Filesize
5.7MB

Download
memory/832-55-0x0000000076BA1000-0x0000000076BA3000-memory.dmp

Filesize
8KB

Download
memory/832-54-0x00000000001D0000-0x00000000001D8000-memory.dmp

Filesize
32KB

Download
memory/832-56-0x00000000072E0000-0x000000000757E000-memory.dmp

Filesize
2.6MB

Download
memory/832-62-0x0000000004F70000-0x0000000004FF0000-memory.dmp

Filesize
512KB

Download
memory/1520-90-0x000000006FB00000-0x00000000700AB000-memory.dmp

Filesize
5.7MB

Download
memory/1520-91-0x000000006FB00000-0x00000000700AB000-memory.dmp

Filesize
5.7MB

Download
memory/1520-92-0x000000006FB00000-0x00000000700AB000-memory.dmp

Filesize
5.7MB

Download
memory/1780-113-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1780-114-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1780-112-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-64-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-83-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-79-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-75-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-73-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-70-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-69-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-68-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1856-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download