Analysis
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max time kernel
120s -
max time network
126s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
19-12-2023 15:10
Static task
static1
Behavioral task
behavioral1
Sample
General Attachment.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
General Attachment.exe
Resource
win10v2004-20231215-en
General
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Target
General Attachment.exe
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Size
461KB
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MD5
103899e1f548e738bb530cb3201cecb9
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SHA1
a9068bdcff88484a1c9dcdef0c320032e154810a
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SHA256
75b520a76495b24d67cdd55903a423bb130cfc8ecbdc4451e4d7ed79d8739cc8
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SHA512
7d6ce52742dbab4efd3ce040a066b92c7b4603956f174b047f461c49adbe29f5a550b416c0dcc86398d876f0168c81b322b577dcf2ed4f608308915d3a76a8f0
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SSDEEP
12288:IjgZm1Qud+hkCbkibFWexzNA85cs3Can:2uud+hPHbFJ+2r7n
Malware Config
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger payload 5 IoCs
Processes:
resource yara_rule behavioral1/memory/2816-9-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2816-11-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2816-15-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2816-18-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2816-20-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger -
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
RegAsm.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.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.
Processes:
flow ioc 2 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
General Attachment.exedescription pid process target process PID 2884 set thread context of 2816 2884 General Attachment.exe RegAsm.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
RegAsm.exepid process 2816 RegAsm.exe 2816 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
RegAsm.exedescription pid process Token: SeDebugPrivilege 2816 RegAsm.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
General Attachment.exedescription pid process target process PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe PID 2884 wrote to memory of 2816 2884 General Attachment.exe RegAsm.exe -
outlook_office_path 1 IoCs
Processes:
RegAsm.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe -
outlook_win_path 1 IoCs
Processes:
RegAsm.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\General Attachment.exe"C:\Users\Admin\AppData\Local\Temp\General Attachment.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2884 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:2816