purecrypter | e691ec947eca2d0cceec93a841a639238c1a69f96860fcbcd864c59a36dfac58

General

Target

Hzgbdtv.exe
Size

7KB
MD5

13f56221e7b4ef51feaa422a92804aaf
SHA1

c0dc841f1683b4588106ab80e46e7767cebcc354
SHA256

e691ec947eca2d0cceec93a841a639238c1a69f96860fcbcd864c59a36dfac58
SHA512

1c3d3a571f8eb4225bdd16b729663f3cca8b373f09e607b032641c1adedd0af3b34f0b3b9cb90a54c89afd761ec6d0d8ee88d6b8dcc05117b84341702dbe0fca
SSDEEP

96:OfGUTjV1Cs/61o2AlTYHSJ+A2BqtmWQHtEkOCJjVEIBRxzNt:OfT/V1Zxl32IcWQHzOCjJ/T

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader stealer

Malware Config

Extracted

Family

snakekeylogger

C2

https://api.telegram.org/bot5824924248:AAF4WKjJ8FxpNsC2HwCM114EP_g8rFkC4wQ/sendMessage?chat_id=2054148913

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/856-56-0x00000000064D0000-0x000000000672A000-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/280-66-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/280-68-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/280-69-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/280-70-0x00000000004206FE-mapping.dmp	family_snakekeylogger
behavioral1/memory/280-74-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/280-72-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\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 856 set thread context of 280	856	Hzgbdtv.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 4 IoCs

pid	Process
1984	powershell.exe
856	Hzgbdtv.exe
280	MSBuild.exe
280	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	856	Hzgbdtv.exe
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	280	MSBuild.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 856 wrote to memory of 1984	856	Hzgbdtv.exe	27
PID 856 wrote to memory of 1984	856	Hzgbdtv.exe	27
PID 856 wrote to memory of 1984	856	Hzgbdtv.exe	27
PID 856 wrote to memory of 1984	856	Hzgbdtv.exe	27
PID 856 wrote to memory of 632	856	Hzgbdtv.exe	29
PID 856 wrote to memory of 632	856	Hzgbdtv.exe	29
PID 856 wrote to memory of 632	856	Hzgbdtv.exe	29
PID 856 wrote to memory of 632	856	Hzgbdtv.exe	29
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30
PID 856 wrote to memory of 280	856	Hzgbdtv.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Hzgbdtv.exe
"C:\Users\Admin\AppData\Local\Temp\Hzgbdtv.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:856
- 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:1984
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:632
- 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:280

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/280-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/280-66-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/280-72-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/280-74-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/280-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/280-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/280-64-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/856-62-0x0000000005590000-0x00000000055DA000-memory.dmp

Filesize
296KB

Download
memory/856-55-0x0000000075D01000-0x0000000075D03000-memory.dmp

Filesize
8KB

Download
memory/856-54-0x00000000013C0000-0x00000000013C8000-memory.dmp

Filesize
32KB

Download
memory/856-56-0x00000000064D0000-0x000000000672A000-memory.dmp

Filesize
2.4MB

Download
memory/1984-59-0x000000006F750000-0x000000006FCFB000-memory.dmp

Filesize
5.7MB

Download
memory/1984-61-0x000000006F750000-0x000000006FCFB000-memory.dmp

Filesize
5.7MB

Download
memory/1984-60-0x000000006F750000-0x000000006FCFB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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