purecrypter | a539cbe05c220c5a791f2581c2a306273a9d954868428bffd1b01d2bd2fa721d

General

Target

SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.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/656-69-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/656-70-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/656-72-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/656-74-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/656-76-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/656-77-0x0000000000450000-0x0000000000490000-memory.dmp	family_snakekeylogger
behavioral1/memory/656-78-0x0000000000450000-0x0000000000490000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\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 1996 set thread context of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.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 2 IoCs

pid	Process
1908	powershell.exe
656	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe
Token: SeDebugPrivilege	1908	powershell.exe
Token: SeDebugPrivilege	656	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 1908	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	28
PID 1996 wrote to memory of 1908	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	28
PID 1996 wrote to memory of 1908	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	28
PID 1996 wrote to memory of 1908	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	28
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30
PID 1996 wrote to memory of 656	1996	SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan-Downloader.0059c9381.12565.25515.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1996
- 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:1908
- 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:656

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

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Downloads

memory/656-72-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/656-70-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/656-77-0x0000000000450000-0x0000000000490000-memory.dmp

Filesize
256KB

Download
memory/656-74-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/656-71-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/656-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/656-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/656-67-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/656-78-0x0000000000450000-0x0000000000490000-memory.dmp

Filesize
256KB

Download
memory/656-76-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1908-63-0x0000000002480000-0x00000000024C0000-memory.dmp

Filesize
256KB

Download
memory/1908-61-0x0000000002480000-0x00000000024C0000-memory.dmp

Filesize
256KB

Download
memory/1908-60-0x0000000002480000-0x00000000024C0000-memory.dmp

Filesize
256KB

Download
memory/1908-65-0x0000000002480000-0x00000000024C0000-memory.dmp

Filesize
256KB

Download
memory/1908-64-0x0000000002480000-0x00000000024C0000-memory.dmp

Filesize
256KB

Download
memory/1996-62-0x0000000000230000-0x0000000000270000-memory.dmp

Filesize
256KB

Download
memory/1996-55-0x0000000000230000-0x0000000000270000-memory.dmp

Filesize
256KB

Download
memory/1996-54-0x0000000000120000-0x000000000013A000-memory.dmp

Filesize
104KB

Download
memory/1996-57-0x00000000059D0000-0x0000000005A62000-memory.dmp

Filesize
584KB

Download
memory/1996-56-0x0000000005E90000-0x0000000005FEA000-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