Analysis
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max time kernel
142s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 01:11
Static task
static1
Behavioral task
behavioral1
Sample
SKM_004202005000.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
SKM_004202005000.exe
Resource
win10v2004-20220414-en
General
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Target
SKM_004202005000.exe
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Size
538KB
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MD5
7b29ed387e5ee010639af0fad63d582b
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SHA1
b68dfa3f4220665d4c0bb90480305d79948e838e
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SHA256
51d5ab8487876cbc9c82c7450affdab67de13f1ff8b126f82fefa4281698ad59
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SHA512
d905c44ac09aaece6b72acf53897c273ecd36512f5ac5d054b4217bdd290aa4c4dee6262c4c85f9a1cd67abd7f0c102a4fdfec4deab0c99d813192cbca166b70
Malware Config
Extracted
Protocol: smtp- Host:
us2.smtp.mailhostbox.com - Port:
587 - Username:
[email protected] - Password:
rDdlJ%h9
Signatures
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404 Keylogger
Information stealer and keylogger first seen in 2019.
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404 Keylogger Main Executable 2 IoCs
Processes:
resource yara_rule behavioral2/memory/2672-131-0x0000000000900000-0x0000000000922000-memory.dmp family_404keylogger behavioral2/memory/2672-132-0x0000000000900000-0x0000000000922000-memory.dmp family_404keylogger -
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:
SKM_004202005000.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SKM_004202005000.exe Key opened \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SKM_004202005000.exe Key opened \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SKM_004202005000.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 8 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
SKM_004202005000.exedescription pid process target process PID 3584 set thread context of 2672 3584 SKM_004202005000.exe SKM_004202005000.exe -
Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 8 2672 WerFault.exe SKM_004202005000.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
SKM_004202005000.exeSKM_004202005000.exepid process 3584 SKM_004202005000.exe 3584 SKM_004202005000.exe 2672 SKM_004202005000.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
SKM_004202005000.exepid process 3584 SKM_004202005000.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
SKM_004202005000.exedescription pid process Token: SeDebugPrivilege 2672 SKM_004202005000.exe -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
SKM_004202005000.exedescription pid process target process PID 3584 wrote to memory of 2672 3584 SKM_004202005000.exe SKM_004202005000.exe PID 3584 wrote to memory of 2672 3584 SKM_004202005000.exe SKM_004202005000.exe PID 3584 wrote to memory of 2672 3584 SKM_004202005000.exe SKM_004202005000.exe -
outlook_office_path 1 IoCs
Processes:
SKM_004202005000.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SKM_004202005000.exe -
outlook_win_path 1 IoCs
Processes:
SKM_004202005000.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SKM_004202005000.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\SKM_004202005000.exe"C:\Users\Admin\AppData\Local\Temp\SKM_004202005000.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\SKM_004202005000.exe"C:\Users\Admin\AppData\Local\Temp\SKM_004202005000.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2672 -s 21683⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2672 -ip 26721⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/2672-130-0x0000000000000000-mapping.dmp
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memory/2672-131-0x0000000000900000-0x0000000000922000-memory.dmpFilesize
136KB
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memory/2672-132-0x0000000000900000-0x0000000000922000-memory.dmpFilesize
136KB
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memory/2672-134-0x00000000049A0000-0x0000000004F44000-memory.dmpFilesize
5.6MB
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memory/2672-135-0x00000000048F0000-0x000000000498C000-memory.dmpFilesize
624KB
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memory/2672-136-0x00000000059C0000-0x0000000005A26000-memory.dmpFilesize
408KB
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memory/2672-137-0x0000000005F00000-0x00000000060C2000-memory.dmpFilesize
1.8MB
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memory/2672-138-0x00000000062D0000-0x0000000006362000-memory.dmpFilesize
584KB
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memory/3584-133-0x00000000007D0000-0x00000000007DA000-memory.dmpFilesize
40KB