purecrypter | 5ad17bffe3731205fe37d626ca9f597a57c70ee620cb09f2b46547f5a174df17

General

Target

New Order _letter.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 1 IoCs

resource	yara_rule
behavioral2/memory/4116-166-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\Control Panel\International\Geo\Nation	New Order _letter.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\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
39	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4320 set thread context of 4116	4320	New Order _letter.exe	93

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
632	powershell.exe
632	powershell.exe
4116	MSBuild.exe
4116	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4320	New Order _letter.exe
Token: SeDebugPrivilege	632	powershell.exe
Token: SeDebugPrivilege	4116	MSBuild.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4320 wrote to memory of 632	4320	New Order _letter.exe	84
PID 4320 wrote to memory of 632	4320	New Order _letter.exe	84
PID 4320 wrote to memory of 632	4320	New Order _letter.exe	84
PID 4320 wrote to memory of 4116	4320	New Order _letter.exe	93
PID 4320 wrote to memory of 4116	4320	New Order _letter.exe	93
PID 4320 wrote to memory of 4116	4320	New Order _letter.exe	93
PID 4320 wrote to memory of 4116	4320	New Order _letter.exe	93
PID 4320 wrote to memory of 4116	4320	New Order _letter.exe	93
PID 4320 wrote to memory of 4116	4320	New Order _letter.exe	93
PID 4320 wrote to memory of 4116	4320	New Order _letter.exe	93
PID 4320 wrote to memory of 4116	4320	New Order _letter.exe	93

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\New Order _letter.exe
"C:\Users\Admin\AppData\Local\Temp\New Order _letter.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4320
- 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: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:4116

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_md35g344.4e1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/632-139-0x0000000002D30000-0x0000000002D66000-memory.dmp

Filesize
216KB

Download
memory/632-161-0x0000000002D20000-0x0000000002D30000-memory.dmp

Filesize
64KB

Download
memory/632-154-0x0000000006300000-0x000000000631E000-memory.dmp

Filesize
120KB

Download
memory/632-160-0x0000000002D20000-0x0000000002D30000-memory.dmp

Filesize
64KB

Download
memory/632-155-0x0000000007B40000-0x00000000081BA000-memory.dmp

Filesize
6.5MB

Download
memory/632-159-0x0000000002D20000-0x0000000002D30000-memory.dmp

Filesize
64KB

Download
memory/632-140-0x0000000005410000-0x0000000005A38000-memory.dmp

Filesize
6.2MB

Download
memory/632-156-0x0000000006820000-0x000000000683A000-memory.dmp

Filesize
104KB

Download
memory/632-142-0x0000000002D20000-0x0000000002D30000-memory.dmp

Filesize
64KB

Download
memory/632-143-0x0000000005BA0000-0x0000000005C06000-memory.dmp

Filesize
408KB

Download
memory/632-144-0x0000000005CC0000-0x0000000005D26000-memory.dmp

Filesize
408KB

Download
memory/632-157-0x0000000002D20000-0x0000000002D30000-memory.dmp

Filesize
64KB

Download
memory/632-141-0x0000000002D20000-0x0000000002D30000-memory.dmp

Filesize
64KB

Download
memory/4116-166-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4116-168-0x0000000005020000-0x00000000050BC000-memory.dmp

Filesize
624KB

Download
memory/4116-169-0x00000000052A0000-0x00000000052B0000-memory.dmp

Filesize
64KB

Download
memory/4116-170-0x0000000006050000-0x0000000006212000-memory.dmp

Filesize
1.8MB

Download
memory/4116-171-0x00000000052A0000-0x00000000052B0000-memory.dmp

Filesize
64KB

Download
memory/4320-138-0x00000000094C0000-0x00000000094E2000-memory.dmp

Filesize
136KB

Download
memory/4320-136-0x00000000054E0000-0x00000000054EA000-memory.dmp

Filesize
40KB

Download
memory/4320-134-0x0000000005A50000-0x0000000005FF4000-memory.dmp

Filesize
5.6MB

Download
memory/4320-158-0x00000000056F0000-0x0000000005700000-memory.dmp

Filesize
64KB

Download
memory/4320-133-0x0000000000B30000-0x0000000000B42000-memory.dmp

Filesize
72KB

Download
memory/4320-137-0x00000000056F0000-0x0000000005700000-memory.dmp

Filesize
64KB

Download
memory/4320-135-0x0000000005540000-0x00000000055D2000-memory.dmp

Filesize
584KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads