Malware Analysis Report

2024-11-13 16:42

Sample ID 230302-fwp6hsbf36
Target a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d
SHA256 a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d
Tags
purecrypter snakekeylogger collection downloader keylogger loader stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d

Threat Level: Known bad

The file a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d was found to be: Known bad.

Malicious Activity Summary

purecrypter snakekeylogger collection downloader keylogger loader stealer

PureCrypter

Purecrypter family

Snake Keylogger payload

Snake Keylogger

Accesses Microsoft Outlook profiles

Looks up external IP address via web service

Suspicious use of SetThreadContext

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

outlook_office_path

outlook_win_path

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-03-02 05:13

Signatures

Purecrypter family

purecrypter

Analysis: behavioral1

Detonation Overview

Submitted

2023-03-02 05:13

Reported

2023-03-02 05:16

Platform

win10-20230220-en

Max time kernel

56s

Max time network

132s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe"

Signatures

PureCrypter

loader downloader purecrypter

Snake Keylogger

stealer keylogger snakekeylogger

Snake Keylogger payload

Description Indicator Process Target
N/A N/A N/A N/A

Accesses Microsoft Outlook profiles

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3236 set thread context of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3236 wrote to memory of 3904 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 3236 wrote to memory of 3904 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 3236 wrote to memory of 3904 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 3236 wrote to memory of 4588 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4588 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4588 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
PID 3236 wrote to memory of 4596 N/A C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3346939869-2835594282-3775165920-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe

"C:\Users\Admin\AppData\Local\Temp\a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

Network

Country Destination Domain Proto
US 192.3.26.135:80 192.3.26.135 tcp
US 8.8.8.8:53 135.26.3.192.in-addr.arpa udp
US 8.8.8.8:53 checkip.dyndns.org udp
US 193.122.130.0:80 checkip.dyndns.org tcp
US 8.8.8.8:53 0.130.122.193.in-addr.arpa udp
NL 20.50.201.195:443 tcp
US 8.8.8.8:53 63.13.109.52.in-addr.arpa udp

Files

memory/3236-117-0x0000000000530000-0x000000000054A000-memory.dmp

memory/3236-118-0x0000000005300000-0x00000000057FE000-memory.dmp

memory/3236-119-0x0000000004EE0000-0x0000000004F72000-memory.dmp

memory/3236-120-0x0000000005060000-0x0000000005070000-memory.dmp

memory/3236-121-0x0000000004EA0000-0x0000000004EAA000-memory.dmp

memory/3236-122-0x00000000066F0000-0x000000000684A000-memory.dmp

memory/3236-123-0x0000000007AD0000-0x0000000007B62000-memory.dmp

memory/3236-124-0x0000000007B90000-0x0000000007BB2000-memory.dmp

memory/3236-125-0x0000000007BC0000-0x0000000007F10000-memory.dmp

memory/3904-128-0x00000000066E0000-0x0000000006716000-memory.dmp

memory/3904-129-0x0000000004630000-0x0000000004640000-memory.dmp

memory/3904-130-0x0000000006D50000-0x0000000007378000-memory.dmp

memory/3904-131-0x0000000007490000-0x00000000074F6000-memory.dmp

memory/3904-132-0x00000000076E0000-0x0000000007746000-memory.dmp

memory/3904-133-0x00000000077D0000-0x00000000077EC000-memory.dmp

memory/3904-134-0x0000000007BB0000-0x0000000007BFB000-memory.dmp

memory/3904-135-0x0000000007F20000-0x0000000007F96000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xx4xtigo.cyt.ps1

MD5 c4ca4238a0b923820dcc509a6f75849b
SHA1 356a192b7913b04c54574d18c28d46e6395428ab
SHA256 6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
SHA512 4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

memory/3904-150-0x00000000096D0000-0x0000000009D48000-memory.dmp

memory/3904-151-0x0000000008C70000-0x0000000008C8A000-memory.dmp

memory/3904-154-0x0000000004630000-0x0000000004640000-memory.dmp

memory/4596-158-0x0000000000400000-0x0000000000426000-memory.dmp

memory/4596-160-0x0000000005130000-0x00000000051CC000-memory.dmp

memory/4596-161-0x0000000005500000-0x0000000005510000-memory.dmp

memory/4596-162-0x0000000006120000-0x00000000062E2000-memory.dmp

memory/4596-163-0x0000000005500000-0x0000000005510000-memory.dmp