Analysis
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max time kernel
52s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
04-07-2022 17:56
Static task
static1
Behavioral task
behavioral1
Sample
flosh.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
flosh.exe
Resource
win10v2004-20220414-en
General
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Target
flosh.exe
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Size
52KB
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MD5
fc98b95e8ff90b78895ed01d5a6dd1d3
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SHA1
526aeb6d7216a9567b619b56ef0af0693bae72a9
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SHA256
cd4af46185777fd2e5fc2bed90454d28f54273e797afc77ae8230df60b26f3bb
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SHA512
830bd621b0109929812c90fa6c352c98dd6aa424927f499c2658dbe8297da9449268ead089639414c55e35cd9185fec1a57a4f03433a3513f7e442bcfa4a9694
Malware Config
Extracted
snakekeylogger
https://api.telegram.org/bot5583198829:AAHbRGAnlJ9Tg3ETPxGtj_jZ8tVhm4DB4io/sendMessage?chat_id=1148000519
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger Payload 6 IoCs
Processes:
resource yara_rule behavioral1/memory/2040-66-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2040-68-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2040-69-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2040-70-0x000000000042023E-mapping.dmp family_snakekeylogger behavioral1/memory/2040-72-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger behavioral1/memory/2040-74-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
InstallUtil.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
flosh.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run\Jygbicka = "\"C:\\Users\\Admin\\AppData\\Roaming\\Puklbng\\Jygbicka.exe\"" flosh.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 7 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
flosh.exedescription pid process target process PID 304 set thread context of 2040 304 flosh.exe InstallUtil.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
powershell.exeflosh.exeInstallUtil.exepid process 1476 powershell.exe 304 flosh.exe 304 flosh.exe 304 flosh.exe 2040 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
flosh.exepowershell.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 304 flosh.exe Token: SeDebugPrivilege 1476 powershell.exe Token: SeDebugPrivilege 2040 InstallUtil.exe -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
flosh.exedescription pid process target process PID 304 wrote to memory of 1476 304 flosh.exe powershell.exe PID 304 wrote to memory of 1476 304 flosh.exe powershell.exe PID 304 wrote to memory of 1476 304 flosh.exe powershell.exe PID 304 wrote to memory of 1476 304 flosh.exe powershell.exe PID 304 wrote to memory of 1712 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 1712 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 1712 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 1712 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 1712 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 1712 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 1712 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe PID 304 wrote to memory of 2040 304 flosh.exe InstallUtil.exe -
outlook_office_path 1 IoCs
Processes:
InstallUtil.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe -
outlook_win_path 1 IoCs
Processes:
InstallUtil.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\flosh.exe"C:\Users\Admin\AppData\Local\Temp\flosh.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgAwAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/304-54-0x00000000001D0000-0x00000000001E4000-memory.dmpFilesize
80KB
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memory/304-55-0x0000000075311000-0x0000000075313000-memory.dmpFilesize
8KB
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memory/304-56-0x0000000005020000-0x00000000050B0000-memory.dmpFilesize
576KB
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memory/304-57-0x00000000045D0000-0x000000000461C000-memory.dmpFilesize
304KB
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memory/1476-58-0x0000000000000000-mapping.dmp
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memory/1476-60-0x000000006FF40000-0x00000000704EB000-memory.dmpFilesize
5.7MB
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memory/1476-61-0x000000006FF40000-0x00000000704EB000-memory.dmpFilesize
5.7MB
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memory/1476-62-0x000000006FF40000-0x00000000704EB000-memory.dmpFilesize
5.7MB
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memory/2040-63-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2040-64-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2040-66-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2040-68-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2040-69-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2040-70-0x000000000042023E-mapping.dmp
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memory/2040-72-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2040-74-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB