Analysis
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max time kernel
80s -
max time network
107s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
22-06-2021 06:00
Static task
static1
Behavioral task
behavioral1
Sample
Tax Invoice.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
Tax Invoice.exe
Resource
win10v20210410
General
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Target
Tax Invoice.exe
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Size
875KB
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MD5
cb892d4aa19c97ee133b9c33816cd8b2
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SHA1
1cd234a215385def2fc046e0809489cab4f5070d
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SHA256
c3563e777c01c0ea26f7a8f26e598dacd68d096966011da76a5311f09ba21614
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SHA512
df7dcfffda6c3c2a077b6fb2bc800d79cc86f80e6d6ccee91aed8297b4f7e91258b885bf4989fc0c297a367159ea8dcdee9e6f23531755202a2ee4f3ed0f9d7a
Malware Config
Extracted
snakekeylogger
Protocol: smtp- Host:
mail.iykmoreentrprise.org - Port:
587 - Username:
zalatexinteriors@iykmoreentrprise.org - Password:
Z&6s7s.YLZZi
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger Payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1544-66-0x0000000000400000-0x000000000046A000-memory.dmp family_snakekeylogger behavioral1/memory/1544-67-0x000000000046458E-mapping.dmp family_snakekeylogger behavioral1/memory/1544-68-0x0000000000400000-0x000000000046A000-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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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 11 freegeoip.app 12 freegeoip.app 6 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Tax Invoice.exedescription pid process target process PID 1824 set thread context of 1544 1824 Tax Invoice.exe Tax Invoice.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
Tax Invoice.exepid process 1544 Tax Invoice.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
Tax Invoice.exedescription pid process Token: SeDebugPrivilege 1544 Tax Invoice.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
Tax Invoice.exedescription pid process target process PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe PID 1824 wrote to memory of 1544 1824 Tax Invoice.exe Tax Invoice.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Tax Invoice.exe"C:\Users\Admin\AppData\Local\Temp\Tax Invoice.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Tax Invoice.exe"C:\Users\Admin\AppData\Local\Temp\Tax Invoice.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/1544-66-0x0000000000400000-0x000000000046A000-memory.dmpFilesize
424KB
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memory/1544-67-0x000000000046458E-mapping.dmp
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memory/1544-68-0x0000000000400000-0x000000000046A000-memory.dmpFilesize
424KB
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memory/1544-70-0x00000000046B0000-0x00000000046B1000-memory.dmpFilesize
4KB
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memory/1824-60-0x0000000000E90000-0x0000000000E91000-memory.dmpFilesize
4KB
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memory/1824-62-0x0000000004D70000-0x0000000004D71000-memory.dmpFilesize
4KB
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memory/1824-63-0x0000000000470000-0x0000000000480000-memory.dmpFilesize
64KB
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memory/1824-64-0x0000000005480000-0x00000000054E7000-memory.dmpFilesize
412KB
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memory/1824-65-0x0000000005660000-0x00000000056D3000-memory.dmpFilesize
460KB