purecrypter | a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d

General

Target

tmp.exe
Size

81KB
MD5

d0a9b69bad966520f71412a8ce2035b0
SHA1

ba5347ee2a896b27d211520a3666a682aa9f8e28
SHA256

a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d
SHA512

489000c1a40703380e285912e42916cd4ae2568f5a7371013f9c8b3bb3465440330ddef43731b6b1a8c653661162a805cf745bc8fd66ef386a8d039203920e01
SSDEEP

1536:UxYAEa9Bj08oGaa82Tq70ddJwgKi3izHxGZnLWzSH3OQMjQ4Nzq2B:Ux39bo4EifJKEmH8ZnLuOqHNzR

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader stealer

Malware Config

Extracted

Family

purecrypter

C2

http://192.3.26.135/uo/Wqnssgirj.dat

Extracted

Family

snakekeylogger

Credentials

Protocol: smtp
Host:
us2.smtp.mailhostbox.com
Port:
587
Username:
[email protected]
Password:
doDHyw%0
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/1672-70-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1672-71-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1672-73-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1672-77-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1672-75-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1672-78-0x00000000049D0000-0x0000000004A10000-memory.dmp	family_snakekeylogger
behavioral1/memory/1672-79-0x00000000049D0000-0x0000000004A10000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\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 1852 set thread context of 1672	1852	tmp.exe	28

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 2 IoCs

pid	Process
1296	powershell.exe
1672	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1852	tmp.exe
Token: SeDebugPrivilege	1296	powershell.exe
Token: SeDebugPrivilege	1672	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 1296	1852	tmp.exe	26
PID 1852 wrote to memory of 1296	1852	tmp.exe	26
PID 1852 wrote to memory of 1296	1852	tmp.exe	26
PID 1852 wrote to memory of 1296	1852	tmp.exe	26
PID 1852 wrote to memory of 1672	1852	tmp.exe	28
PID 1852 wrote to memory of 1672	1852	tmp.exe	28
PID 1852 wrote to memory of 1672	1852	tmp.exe	28
PID 1852 wrote to memory of 1672	1852	tmp.exe	28
PID 1852 wrote to memory of 1672	1852	tmp.exe	28
PID 1852 wrote to memory of 1672	1852	tmp.exe	28
PID 1852 wrote to memory of 1672	1852	tmp.exe	28
PID 1852 wrote to memory of 1672	1852	tmp.exe	28
PID 1852 wrote to memory of 1672	1852	tmp.exe	28

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1852
- 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:1296
- 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:1672

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/1296-66-0x0000000002620000-0x0000000002660000-memory.dmp

Filesize
256KB

Download
memory/1296-60-0x0000000002620000-0x0000000002660000-memory.dmp

Filesize
256KB

Download
memory/1296-65-0x0000000002620000-0x0000000002660000-memory.dmp

Filesize
256KB

Download
memory/1296-64-0x0000000002620000-0x0000000002660000-memory.dmp

Filesize
256KB

Download
memory/1296-62-0x0000000002620000-0x0000000002660000-memory.dmp

Filesize
256KB

Download
memory/1296-61-0x0000000002620000-0x0000000002660000-memory.dmp

Filesize
256KB

Download
memory/1672-72-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1672-73-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1672-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1672-70-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1672-79-0x00000000049D0000-0x0000000004A10000-memory.dmp

Filesize
256KB

Download
memory/1672-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1672-78-0x00000000049D0000-0x0000000004A10000-memory.dmp

Filesize
256KB

Download
memory/1672-71-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1672-75-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1672-77-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1852-54-0x0000000000A60000-0x0000000000A7A000-memory.dmp

Filesize
104KB

Download
memory/1852-57-0x00000000054F0000-0x0000000005582000-memory.dmp

Filesize
584KB

Download
memory/1852-55-0x0000000004F10000-0x0000000004F50000-memory.dmp

Filesize
256KB

Download
memory/1852-63-0x0000000004F10000-0x0000000004F50000-memory.dmp

Filesize
256KB

Download
memory/1852-56-0x0000000006160000-0x00000000062BA000-memory.dmp

Filesize
1.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads