purecrypter | 86ad4fe5295b34f09988a3baffb53aff6f7e48b5daeaed222108df83367397f0

General

Target

STOWAGE PLAN.exe
Size

6KB
MD5

6fb742af8a97217112849204efa9fef1
SHA1

52ab383906f57052e4c075d54b638153e92ad089
SHA256

2f7bd380536e16506e680cc1ad9dfd613a4bd05d365f542ecbdb1bd16562f11d
SHA512

5d8e93352baa4311c331d674bfe8ab8a761a093c32ae97260e3f7e55663b49f75829f4ca0d9029e17439919133f8ca01fee56b680a1fd80f1d3b29ba2ef9c958
SSDEEP

96:x4Z26fp8osOth7fsXKOyc8RB29PrHQtGkjpmBzNt:8bWoBDUXKOyLKKr9mD

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader persistence spyware stealer

Malware Config

Extracted

Family

purecrypter

C2

http://185.225.74.107/Otetnraanrc.dll

Extracted

Family

snakekeylogger

C2

https://api.telegram.org/bot1897716112:AAEAtOCkOV8umHBB93Og24bkiIdUKReGK44/sendMessage?chat_id=1745211648

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1896-56-0x00000000061A0000-0x0000000006408000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger payload 6 IoCs

resource	yara_rule
behavioral1/memory/1028-66-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1028-68-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1028-69-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1028-70-0x000000000042079E-mapping.dmp	family_snakekeylogger
behavioral1/memory/1028-72-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1028-74-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

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-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	STOWAGE PLAN.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	STOWAGE PLAN.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	STOWAGE PLAN.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-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rnoatpziyqo = "\"C:\\Users\\Admin\\AppData\\Roaming\\Gyazjb\\Rnoatpziyqo.exe\""	STOWAGE PLAN.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
5	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1896 set thread context of 1028	1896	STOWAGE PLAN.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 3 IoCs

pid	Process
1276	powershell.exe
1028	STOWAGE PLAN.exe
1028	STOWAGE PLAN.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1896	STOWAGE PLAN.exe
Token: SeDebugPrivilege	1276	powershell.exe
Token: SeDebugPrivilege	1028	STOWAGE PLAN.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1896 wrote to memory of 1276	1896	STOWAGE PLAN.exe	28
PID 1896 wrote to memory of 1276	1896	STOWAGE PLAN.exe	28
PID 1896 wrote to memory of 1276	1896	STOWAGE PLAN.exe	28
PID 1896 wrote to memory of 1276	1896	STOWAGE PLAN.exe	28
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30
PID 1896 wrote to memory of 1028	1896	STOWAGE PLAN.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	STOWAGE PLAN.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	STOWAGE PLAN.exe

C:\Users\Admin\AppData\Local\Temp\STOWAGE PLAN.exe
"C:\Users\Admin\AppData\Local\Temp\STOWAGE PLAN.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1896
- 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:1276
- C:\Users\Admin\AppData\Local\Temp\STOWAGE PLAN.exe
  "C:\Users\Admin\AppData\Local\Temp\STOWAGE PLAN.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1028

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

Loading Replay Monitor...

Downloads

memory/1028-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1028-66-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1028-74-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1028-72-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1028-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1028-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1028-64-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1276-59-0x000000006FB90000-0x000000007013B000-memory.dmp

Filesize
5.7MB

Download
memory/1276-61-0x000000006FB90000-0x000000007013B000-memory.dmp

Filesize
5.7MB

Download
memory/1276-60-0x000000006FB90000-0x000000007013B000-memory.dmp

Filesize
5.7MB

Download
memory/1896-62-0x00000000050D0000-0x000000000511A000-memory.dmp

Filesize
296KB

Download
memory/1896-55-0x0000000076181000-0x0000000076183000-memory.dmp

Filesize
8KB

Download
memory/1896-54-0x0000000000E20000-0x0000000000E28000-memory.dmp

Filesize
32KB

Download
memory/1896-56-0x00000000061A0000-0x0000000006408000-memory.dmp

Filesize
2.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads