purecrypter | 8afe898373f8fbd1ab34fbcbf90264f4b6a04c85d0b602ff21c580f9f7ccdb2f

General

Target

b66c69055dada82192373293d39e57fa.exe
Size

377KB
MD5

b66c69055dada82192373293d39e57fa
SHA1

c8471929b43972c59e04cd835384dc5627129fae
SHA256

8afe898373f8fbd1ab34fbcbf90264f4b6a04c85d0b602ff21c580f9f7ccdb2f
SHA512

45953920d920df46e4e216c52cf292d538ea74494f71df4e2b7f2d19d8bd7be4b3462457c4092c3343d8608fe770aabb3eb3d471a30f3988424d70e219b77c5f

Score

10^/10

purecrypter snakekeylogger collection keylogger loader spyware stealer trojan

Malware Config

Extracted

Family

snakekeylogger

Credentials

Protocol: smtp
Host:
mail.twinarrow.com.my
Port:
587
Username:
[email protected]
Password:
accountaccount123@
Email To:
[email protected]

Signatures

Detect PureCrypter loader 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1504-55-0x0000000000650000-0x00000000006B0000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a loader which is intended for downloading and executing additional payloads.
trojan loader purecrypter
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger payload 6 IoCs

resource	yara_rule
behavioral1/memory/972-61-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/972-63-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/972-64-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/972-65-0x00000000004202DE-mapping.dmp	family_snakekeylogger
behavioral1/memory/972-67-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/972-69-0x0000000000400000-0x0000000000426000-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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b66c69055dada82192373293d39e57fa.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b66c69055dada82192373293d39e57fa.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b66c69055dada82192373293d39e57fa.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
3	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1504 set thread context of 972	1504	b66c69055dada82192373293d39e57fa.exe	27

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1504	b66c69055dada82192373293d39e57fa.exe
972	b66c69055dada82192373293d39e57fa.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1504	b66c69055dada82192373293d39e57fa.exe
Token: SeDebugPrivilege	972	b66c69055dada82192373293d39e57fa.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27
PID 1504 wrote to memory of 972	1504	b66c69055dada82192373293d39e57fa.exe	27

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b66c69055dada82192373293d39e57fa.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b66c69055dada82192373293d39e57fa.exe

C:\Users\Admin\AppData\Local\Temp\b66c69055dada82192373293d39e57fa.exe
"C:\Users\Admin\AppData\Local\Temp\b66c69055dada82192373293d39e57fa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1504
- C:\Users\Admin\AppData\Local\Temp\b66c69055dada82192373293d39e57fa.exe
  C:\Users\Admin\AppData\Local\Temp\b66c69055dada82192373293d39e57fa.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/972-58-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/972-59-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/972-61-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/972-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/972-64-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/972-67-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/972-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/972-70-0x0000000075271000-0x0000000075273000-memory.dmp

Filesize
8KB

Download
memory/1504-55-0x0000000000650000-0x00000000006B0000-memory.dmp

Filesize
384KB

Download
memory/1504-56-0x0000000000720000-0x0000000000756000-memory.dmp

Filesize
216KB

Download
memory/1504-57-0x0000000000B10000-0x0000000000B5C000-memory.dmp

Filesize
304KB

Download
memory/1504-54-0x00000000013A0000-0x0000000001404000-memory.dmp

Filesize
400KB

Download

Analysis

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