purecrypter | 509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01

General

Target

509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe
Size

2.4MB
MD5

f087119254a5784dbc94b8324ebaca61
SHA1

d82b822ef3b58e35f96ec0fd9d5fc13954c85118
SHA256

509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01
SHA512

c4d9f9fd82d27f0f5dbab133482aa44cc110259f71630a43286d3f175c6e37206f96d6d83a492b2c9f4b1e12bd19aa513d0531f54a050e814204cbdc5995f322
SSDEEP

49152:pGUhixqZAPG4qYCno6kcShxpA1wkf3ejsEhu3SQcF9EYragT5VpgOZu8+Um0Q:pyxqGPGyEKe2sJECSdF9EYWgT5VpTZu6

Score

10^/10

purecrypter collection downloader loader persistence spyware stealer

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1720-56-0x0000000004E40000-0x00000000050B0000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe
Key opened	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe
Key opened	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe

Adds Run key to start application 2 TTPs 1 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\Pqmqvltde = "\"C:\\Users\\Admin\\AppData\\Roaming\\Iwqshpg\\Pqmqvltde.exe\""	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	api.ipify.org
5	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1720 set thread context of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30

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 1 IoCs

pid	Process
1692	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe
Token: SeDebugPrivilege	1692	powershell.exe
Token: SeDebugPrivilege	936	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
936	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 1692	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	28
PID 1720 wrote to memory of 1692	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	28
PID 1720 wrote to memory of 1692	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	28
PID 1720 wrote to memory of 1692	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	28
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30
PID 1720 wrote to memory of 936	1720	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe

C:\Users\Admin\AppData\Local\Temp\509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe
"C:\Users\Admin\AppData\Local\Temp\509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1720
- 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:1692
- C:\Users\Admin\AppData\Local\Temp\509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe
  C:\Users\Admin\AppData\Local\Temp\509cdbdfc3a9c49ba3fae4ecce54fbaed0b6f9f288dc300dc2b52989d502ae01.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:936

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/936-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/936-66-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/936-73-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/936-71-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/936-63-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/936-67-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/936-64-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1692-59-0x000000006F980000-0x000000006FF2B000-memory.dmp

Filesize
5.7MB

Download
memory/1692-61-0x000000006F980000-0x000000006FF2B000-memory.dmp

Filesize
5.7MB

Download
memory/1692-60-0x000000006F980000-0x000000006FF2B000-memory.dmp

Filesize
5.7MB

Download
memory/1720-62-0x00000000043A0000-0x00000000043F4000-memory.dmp

Filesize
336KB

Download
memory/1720-55-0x0000000075D51000-0x0000000075D53000-memory.dmp

Filesize
8KB

Download
memory/1720-54-0x0000000000C80000-0x0000000000EF2000-memory.dmp

Filesize
2.4MB

Download
memory/1720-56-0x0000000004E40000-0x00000000050B0000-memory.dmp

Filesize
2.4MB

Download

Analysis

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