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Analysis
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max time kernel
119s -
max time network
129s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
20/01/2025, 15:52
Static task
static1
Behavioral task
behavioral1
Sample
LETTER OF AUTHORIZATION.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
LETTER OF AUTHORIZATION.exe
Resource
win10v2004-20241007-en
General
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Target
LETTER OF AUTHORIZATION.exe
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Size
1.2MB
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MD5
c787d6c746ed6c0d08e0d7ce05012b56
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SHA1
614d8f36a2016bfa67472876383f9ab2ae55fe48
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SHA256
6ed8984ec6982853a97d73d735054cb897d4acea75e284b9a5493086917206e7
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SHA512
de60d9babe7bf3b7f0e729bb02ac7a7536b7b17b7ca869a34c07571535fa551e10a20f43de79f563cdb84c32ff3119e2c258157e133924c74f27c284cf3dc2a1
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SSDEEP
24576:7Sexfdr7yJ96EbKNxpXq7TYA2rQtlHPI4Q:mNIEbKzVQB
Malware Config
Extracted
snakekeylogger
Protocol: smtp- Host:
yulifertilizer.com.my - Port:
25 - Username:
[email protected] - Password:
Ayfc931319* - 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 5 IoCs
resource yara_rule behavioral1/memory/3036-11-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/3036-8-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/3036-7-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/3036-13-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/3036-15-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger -
Snakekeylogger family
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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 3 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
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 LETTER OF AUTHORIZATION.exe Key opened \REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 LETTER OF AUTHORIZATION.exe Key opened \REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 LETTER OF AUTHORIZATION.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.
flow ioc 4 checkip.dyndns.org 8 reallyfreegeoip.org 9 reallyfreegeoip.org -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2176 set thread context of 3036 2176 LETTER OF AUTHORIZATION.exe 30 -
System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language LETTER OF AUTHORIZATION.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language LETTER OF AUTHORIZATION.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3036 LETTER OF AUTHORIZATION.exe 3036 LETTER OF AUTHORIZATION.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3036 LETTER OF AUTHORIZATION.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 PID 2176 wrote to memory of 3036 2176 LETTER OF AUTHORIZATION.exe 30 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 LETTER OF AUTHORIZATION.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 LETTER OF AUTHORIZATION.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\LETTER OF AUTHORIZATION.exe"C:\Users\Admin\AppData\Local\Temp\LETTER OF AUTHORIZATION.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2176 -
C:\Users\Admin\AppData\Local\Temp\LETTER OF AUTHORIZATION.exe"C:\Users\Admin\AppData\Local\Temp\LETTER OF AUTHORIZATION.exe"2⤵
- Accesses Microsoft Outlook profiles
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:3036
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