purecrypter | f8e39bd0a813aea93939649fb467351f3ebc603e08d4a05b5529b922e6cc8abc

General

Target

INV_PKEX0521219.exe
Size

72KB
MD5

f50c01b28f63ea3a2f9eda5d3f62cafc
SHA1

15194fbd3471810bf689da9efeb57efdd4e4f21b
SHA256

0e7012a66e5d3c6ada99f6dcf651fc8a29f31aa74083f76ee96992df0be54ffa
SHA512

98bd8ce28d997815f135b0a73af05cd45d8bdde9d7a018311d7082ee76c3adca78b62ed161fc187febed6037aa556309cfaf13b2a29b1bd65c4a759e8fd5a8f5
SSDEEP

1536:Ua3eJtxKnsYsEMINcTa7FFrj3Pxx1Px90:Ua3ez4sKNykrjfxxpxi

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader stealer

Malware Config

Extracted

Family

purecrypter

C2

http://172.245.191.17/000/Gjvbeqdycii.png

Extracted

Family

snakekeylogger

Credentials

Protocol: smtp
Host:
siamtmc.com
Port:
587
Username:
[email protected]
Password:
s0mp0ng06
Email To:
[email protected]

Signatures

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 7 IoCs

resource	yara_rule
behavioral1/memory/1588-71-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1588-72-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1588-74-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1588-76-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1588-78-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1588-79-0x0000000000480000-0x00000000004C0000-memory.dmp	family_snakekeylogger
behavioral1/memory/1588-80-0x0000000000480000-0x00000000004C0000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.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 1108 set thread context of 1588	1108	INV_PKEX0521219.exe	29

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1188	powershell.exe
1588	MSBuild.exe
1588	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1108	INV_PKEX0521219.exe
Token: SeDebugPrivilege	1188	powershell.exe
Token: SeDebugPrivilege	1588	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1108 wrote to memory of 1188	1108	INV_PKEX0521219.exe	27
PID 1108 wrote to memory of 1188	1108	INV_PKEX0521219.exe	27
PID 1108 wrote to memory of 1188	1108	INV_PKEX0521219.exe	27
PID 1108 wrote to memory of 1188	1108	INV_PKEX0521219.exe	27
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29
PID 1108 wrote to memory of 1588	1108	INV_PKEX0521219.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\INV_PKEX0521219.exe
"C:\Users\Admin\AppData\Local\Temp\INV_PKEX0521219.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1188
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1588

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1108-63-0x0000000000C90000-0x0000000000CD0000-memory.dmp

Filesize
256KB

Download
memory/1108-55-0x0000000000C90000-0x0000000000CD0000-memory.dmp

Filesize
256KB

Download
memory/1108-56-0x0000000008670000-0x0000000008756000-memory.dmp

Filesize
920KB

Download
memory/1108-57-0x00000000006C0000-0x00000000006D0000-memory.dmp

Filesize
64KB

Download
memory/1108-58-0x0000000004D60000-0x0000000004DF2000-memory.dmp

Filesize
584KB

Download
memory/1108-54-0x0000000000EE0000-0x0000000000EF2000-memory.dmp

Filesize
72KB

Download
memory/1188-66-0x0000000002340000-0x0000000002380000-memory.dmp

Filesize
256KB

Download
memory/1188-62-0x0000000002340000-0x0000000002380000-memory.dmp

Filesize
256KB

Download
memory/1188-65-0x0000000002340000-0x0000000002380000-memory.dmp

Filesize
256KB

Download
memory/1188-64-0x0000000002340000-0x0000000002380000-memory.dmp

Filesize
256KB

Download
memory/1188-61-0x0000000002340000-0x0000000002380000-memory.dmp

Filesize
256KB

Download
memory/1588-71-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1588-70-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1588-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1588-72-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1588-73-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1588-74-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1588-76-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1588-78-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1588-79-0x0000000000480000-0x00000000004C0000-memory.dmp

Filesize
256KB

Download
memory/1588-80-0x0000000000480000-0x00000000004C0000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads