purecrypter | 6a4ff99ad29aa40eddb5e509b7460556ab23f2dc1f08ce014dc32817128e6c05

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
04-02-2023 22:18

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General

Target

PAYMENT CONFIRMATION COPY_ 529520419250297.exe
Size

7KB
MD5

2aa238c62bdf21d61a382de34650c887
SHA1

2e2bb363ca3d9af4b7ab6001e48ef1eca859b94d
SHA256

6a4ff99ad29aa40eddb5e509b7460556ab23f2dc1f08ce014dc32817128e6c05
SHA512

ca540814923464076c0c0e558e3bd246cf29ad8877cf9a57df4f990f121834c90a70f9917bd1625a175be61e7c068afa17bcd2f034fcc273477f0aedb40a39bd
SSDEEP

96:HkzEkmmFXmT7mjXpKQPOGvMtOcDTmbDtEkIFBjQlrQ5bFnU:HqfEwXXPADT6zKWl0A

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/1636-56-0x00000000061E0000-0x000000000647E000-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 2 IoCs

pid	Process
1968	rdfghfgjkgoighjc.exe
2036	rdfghfgjkgoighjc.exe

Loads dropped DLL 1 IoCs

pid	Process
1672	PAYMENT CONFIRMATION COPY_ 529520419250297.exe

Adds Run key to start application 2 TTPs 10 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	rdfghfgjkgoighjc.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	rdfghfgjkgoighjc.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	PAYMENT CONFIRMATION COPY_ 529520419250297.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	PAYMENT CONFIRMATION COPY_ 529520419250297.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Bsrdolf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Ykiwtitgqvp\\Bsrdolf.exe\""	rdfghfgjkgoighjc.exe
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\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
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Bsrdolf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Ykiwtitgqvp\\Bsrdolf.exe\""	PAYMENT CONFIRMATION COPY_ 529520419250297.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	PAYMENT CONFIRMATION COPY_ 529520419250297.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	PAYMENT CONFIRMATION COPY_ 529520419250297.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1636 set thread context of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1968 set thread context of 2036	1968	rdfghfgjkgoighjc.exe	33

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 2 IoCs

pid	Process
1944	powershell.exe
1480	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe
Token: SeDebugPrivilege	1944	powershell.exe
Token: SeDebugPrivilege	1968	rdfghfgjkgoighjc.exe
Token: SeDebugPrivilege	1480	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2036	rdfghfgjkgoighjc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1636 wrote to memory of 1944	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	27
PID 1636 wrote to memory of 1944	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	27
PID 1636 wrote to memory of 1944	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	27
PID 1636 wrote to memory of 1944	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	27
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1636 wrote to memory of 1672	1636	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	29
PID 1672 wrote to memory of 1968	1672	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	30
PID 1672 wrote to memory of 1968	1672	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	30
PID 1672 wrote to memory of 1968	1672	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	30
PID 1672 wrote to memory of 1968	1672	PAYMENT CONFIRMATION COPY_ 529520419250297.exe	30
PID 1968 wrote to memory of 1480	1968	rdfghfgjkgoighjc.exe	31
PID 1968 wrote to memory of 1480	1968	rdfghfgjkgoighjc.exe	31
PID 1968 wrote to memory of 1480	1968	rdfghfgjkgoighjc.exe	31
PID 1968 wrote to memory of 1480	1968	rdfghfgjkgoighjc.exe	31
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33
PID 1968 wrote to memory of 2036	1968	rdfghfgjkgoighjc.exe	33

C:\Users\Admin\AppData\Local\Temp\PAYMENT CONFIRMATION COPY_ 529520419250297.exe
"C:\Users\Admin\AppData\Local\Temp\PAYMENT CONFIRMATION COPY_ 529520419250297.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1636
- 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:1944
- C:\Users\Admin\AppData\Local\Temp\PAYMENT CONFIRMATION COPY_ 529520419250297.exe
  "C:\Users\Admin\AppData\Local\Temp\PAYMENT CONFIRMATION COPY_ 529520419250297.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1672
- - 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 use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1968
  - - 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:1480
  - - 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:2036

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
2aa238c62bdf21d61a382de34650c887

SHA1
2e2bb363ca3d9af4b7ab6001e48ef1eca859b94d

SHA256
6a4ff99ad29aa40eddb5e509b7460556ab23f2dc1f08ce014dc32817128e6c05

SHA512
ca540814923464076c0c0e558e3bd246cf29ad8877cf9a57df4f990f121834c90a70f9917bd1625a175be61e7c068afa17bcd2f034fcc273477f0aedb40a39bd

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

Filesize
7KB

MD5
2aa238c62bdf21d61a382de34650c887

SHA1
2e2bb363ca3d9af4b7ab6001e48ef1eca859b94d

SHA256
6a4ff99ad29aa40eddb5e509b7460556ab23f2dc1f08ce014dc32817128e6c05

SHA512
ca540814923464076c0c0e558e3bd246cf29ad8877cf9a57df4f990f121834c90a70f9917bd1625a175be61e7c068afa17bcd2f034fcc273477f0aedb40a39bd

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

Filesize
7KB

MD5
2aa238c62bdf21d61a382de34650c887

SHA1
2e2bb363ca3d9af4b7ab6001e48ef1eca859b94d

SHA256
6a4ff99ad29aa40eddb5e509b7460556ab23f2dc1f08ce014dc32817128e6c05

SHA512
ca540814923464076c0c0e558e3bd246cf29ad8877cf9a57df4f990f121834c90a70f9917bd1625a175be61e7c068afa17bcd2f034fcc273477f0aedb40a39bd

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

Filesize
7KB

MD5
a69fa62e967f23522d1ae7792899a8bb

SHA1
466630f75c19b3fc50006026067846b7c323e01a

SHA256
93a255d046c0f1e5ebb3e45ff9ad2d7ba1284c2d045915b7d694355ec37d9b05

SHA512
288363a6575cfe74827da5f140f619c20b3fc1cc6bafbf297cf59be521684ba5d099ecf9b8c918471a4672aee64314b56967b14e00935d8b65777c93b44667c2

Download Submit
C:\Users\Admin\AppData\Roaming\Ykiwtitgqvp\Bsrdolf.exe

Filesize
7KB

MD5
2aa238c62bdf21d61a382de34650c887

SHA1
2e2bb363ca3d9af4b7ab6001e48ef1eca859b94d

SHA256
6a4ff99ad29aa40eddb5e509b7460556ab23f2dc1f08ce014dc32817128e6c05

SHA512
ca540814923464076c0c0e558e3bd246cf29ad8877cf9a57df4f990f121834c90a70f9917bd1625a175be61e7c068afa17bcd2f034fcc273477f0aedb40a39bd

Download Submit
\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
2aa238c62bdf21d61a382de34650c887

SHA1
2e2bb363ca3d9af4b7ab6001e48ef1eca859b94d

SHA256
6a4ff99ad29aa40eddb5e509b7460556ab23f2dc1f08ce014dc32817128e6c05

SHA512
ca540814923464076c0c0e558e3bd246cf29ad8877cf9a57df4f990f121834c90a70f9917bd1625a175be61e7c068afa17bcd2f034fcc273477f0aedb40a39bd

Download Submit
memory/1480-91-0x000000006F3C0000-0x000000006F96B000-memory.dmp

Filesize
5.7MB

Download
memory/1480-90-0x000000006F3C0000-0x000000006F96B000-memory.dmp

Filesize
5.7MB

Download
memory/1480-92-0x000000006F3C0000-0x000000006F96B000-memory.dmp

Filesize
5.7MB

Download
memory/1636-62-0x00000000053B0000-0x0000000005430000-memory.dmp

Filesize
512KB

Download
memory/1636-54-0x0000000001310000-0x0000000001318000-memory.dmp

Filesize
32KB

Download
memory/1636-56-0x00000000061E0000-0x000000000647E000-memory.dmp

Filesize
2.6MB

Download
memory/1636-55-0x00000000761F1000-0x00000000761F3000-memory.dmp

Filesize
8KB

Download
memory/1672-64-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-68-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-75-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-79-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-83-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-70-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-69-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1672-73-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1944-61-0x000000006F3E0000-0x000000006F98B000-memory.dmp

Filesize
5.7MB

Download
memory/1944-60-0x000000006F3E0000-0x000000006F98B000-memory.dmp

Filesize
5.7MB

Download
memory/1944-59-0x000000006F3E0000-0x000000006F98B000-memory.dmp

Filesize
5.7MB

Download
memory/1968-85-0x0000000000330000-0x0000000000338000-memory.dmp

Filesize
32KB

Download
memory/2036-111-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2036-112-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2036-113-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download