purecrypter | 3b6d60b69e3438ca5aaad8edf8b87f8c39f72803aa3c90a929aff5239d998333

General

Target

Uarngd.exe
Size

7KB
MD5

51b95537e2f88be4e97ca30fd565c6a2
SHA1

3c19c4f72b3737b8c365462b578e46a681990470
SHA256

3b6d60b69e3438ca5aaad8edf8b87f8c39f72803aa3c90a929aff5239d998333
SHA512

d177cfdbec6511d7fce4911b0e2b4d3581bb625d02df2ced2ab3cf774873cae1748f796fa939b269c1d0c267a63f89d82c51784c183c067cd9f9c6a0f89e9c39
SSDEEP

96:0+10kTSeg3MLEmVJsdtldCDxLGP8ZY7ZMtblNb6k2wImQgJtXstMtzNt:0+nWeg3SXJ45C5GPGldHbIfgzXEMH

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader persistence spyware stealer

Malware Config

Extracted

Family

snakekeylogger

C2

https://api.telegram.org/bot5497972920:AAHqqS9EfkxnwYz3pQtCWef33URevfy5tRk/sendMessage?chat_id=1653988628

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/2024-56-0x00000000062B0000-0x0000000006520000-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/1544-66-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1544-68-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1544-69-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1544-70-0x00000000004207DE-mapping.dmp	family_snakekeylogger
behavioral1/memory/1544-72-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1544-74-0x0000000000400000-0x0000000000426000-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-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Uarngd.exe
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Uarngd.exe
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Uarngd.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-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\Fapkq = "\"C:\\Users\\Admin\\AppData\\Roaming\\Icrqbdo\\Fapkq.exe\""	Uarngd.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
6	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2024 set thread context of 1544	2024	Uarngd.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
596	powershell.exe
1544	Uarngd.exe
1544	Uarngd.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2024	Uarngd.exe
Token: SeDebugPrivilege	596	powershell.exe
Token: SeDebugPrivilege	1544	Uarngd.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2024 wrote to memory of 596	2024	Uarngd.exe	28
PID 2024 wrote to memory of 596	2024	Uarngd.exe	28
PID 2024 wrote to memory of 596	2024	Uarngd.exe	28
PID 2024 wrote to memory of 596	2024	Uarngd.exe	28
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30
PID 2024 wrote to memory of 1544	2024	Uarngd.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Uarngd.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Uarngd.exe

C:\Users\Admin\AppData\Local\Temp\Uarngd.exe
"C:\Users\Admin\AppData\Local\Temp\Uarngd.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2024
- 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:596
- C:\Users\Admin\AppData\Local\Temp\Uarngd.exe
  C:\Users\Admin\AppData\Local\Temp\Uarngd.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1544

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/596-59-0x000000006F9E0000-0x000000006FF8B000-memory.dmp

Filesize
5.7MB

Download
memory/596-61-0x000000006F9E0000-0x000000006FF8B000-memory.dmp

Filesize
5.7MB

Download
memory/596-60-0x000000006F9E0000-0x000000006FF8B000-memory.dmp

Filesize
5.7MB

Download
memory/1544-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1544-64-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1544-66-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1544-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1544-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1544-72-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1544-74-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2024-56-0x00000000062B0000-0x0000000006520000-memory.dmp

Filesize
2.4MB

Download
memory/2024-55-0x00000000760B1000-0x00000000760B3000-memory.dmp

Filesize
8KB

Download
memory/2024-62-0x0000000004EE0000-0x0000000004F2A000-memory.dmp

Filesize
296KB

Download
memory/2024-54-0x00000000013B0000-0x00000000013B8000-memory.dmp

Filesize
32KB

Download

Analysis

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