Analysis
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max time kernel
122s -
max time network
135s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
31-01-2022 17:53
Static task
static1
Behavioral task
behavioral1
Sample
proforma invoice.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
proforma invoice.exe
Resource
win10v2004-en-20220112
General
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Target
proforma invoice.exe
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Size
486KB
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MD5
9c6c327f42df226c0c09561218bb5119
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SHA1
2dc652211fdb2b9d0690e6a1d2f692a0c04af2bc
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SHA256
aaa1238cff25c9609f089d345d805e5ea580e9e9cddfcdd640e446d0dfa3ad27
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SHA512
70449ac67b625f207a33f1231dca0636c5a9f2837d1d8492ddff394d28f301aa79581fb559502b4d908ad3598f8925e491b3f465de467893c195c7ee44a9f4db
Malware Config
Extracted
Protocol: smtp- Host:
mail.faks-allied-health.com - Port:
587 - Username:
[email protected] - Password:
$Faks1234
Extracted
snakekeylogger
Protocol: smtp- Host:
mail.faks-allied-health.com - Port:
587 - Username:
[email protected] - Password:
$Faks1234 - Email To:
[email protected]
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger Payload 4 IoCs
Processes:
resource yara_rule behavioral1/memory/760-61-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/760-62-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/760-63-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/760-64-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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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:
proforma invoice.exedescription ioc Process Key opened \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 proforma invoice.exe Key opened \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 proforma invoice.exe Key opened \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 proforma invoice.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 4 checkip.dyndns.org 8 freegeoip.app 9 freegeoip.app -
Suspicious use of SetThreadContext 1 IoCs
Processes:
proforma invoice.exedescription pid Process procid_target PID 1580 set thread context of 760 1580 proforma invoice.exe 27 -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
proforma invoice.exepid Process 760 proforma invoice.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
proforma invoice.exedescription pid Process Token: SeDebugPrivilege 760 proforma invoice.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
proforma invoice.exedescription pid Process procid_target PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 PID 1580 wrote to memory of 760 1580 proforma invoice.exe 27 -
outlook_office_path 1 IoCs
Processes:
proforma invoice.exedescription ioc Process Key opened \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 proforma invoice.exe -
outlook_win_path 1 IoCs
Processes:
proforma invoice.exedescription ioc Process Key opened \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 proforma invoice.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\proforma invoice.exe"C:\Users\Admin\AppData\Local\Temp\proforma invoice.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1580 -
C:\Users\Admin\AppData\Local\Temp\proforma invoice.exe"C:\Users\Admin\AppData\Local\Temp\proforma invoice.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:760
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