Analysis
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max time kernel
154s -
max time network
132s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
02-10-2022 15:37
Static task
static1
Behavioral task
behavioral1
Sample
1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe
Resource
win7-20220901-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe
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Size
264KB
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MD5
0528c726bebd1ff87bb504017304bd85
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SHA1
f02b71c66fabd6dc0c3220b797f41ddf3220fa14
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SHA256
1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2
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SHA512
413ebd7b27994d6be0dc2d09203eb38708a6b506376a0e39074699972402136444fd567a9da15996c69807d217fb13b1b9063251129440c155a200d776e701aa
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SSDEEP
3072:bwwQcqsOr//2IDyG2pfr4GNLzECcKIvMBSYWunCvPQiwhjXH1WkaBx5/lvnjLYa7:swQ3sOrn9Ic6OLynWunzXH1W9rt
Score
10/10
Malware Config
Signatures
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Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" srfaf.exe Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0" 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe -
Executes dropped EXE 1 IoCs
pid Process 4808 srfaf.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe -
Adds Run key to start application 2 TTPs 53 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /L" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /I" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /O" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /U" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /E" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /r" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /y" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /a" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /b" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /T" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /d" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /H" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /l" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /f" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /C" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /V" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /K" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /Q" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /X" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /S" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /p" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /h" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /Y" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /Z" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /j" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /P" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /c" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /F" srfaf.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /m" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /w" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /J" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /o" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /D" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /q" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /i" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /g" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /s" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /R" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /x" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /M" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /W" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /k" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /z" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /e" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /T" 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\ srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /t" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /B" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /n" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /G" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /A" srfaf.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\srfaf = "C:\\Users\\Admin\\srfaf.exe /u" srfaf.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 64 IoCs
pid Process 4968 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe 4968 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe 4808 srfaf.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 4968 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe 4808 srfaf.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4968 wrote to memory of 4808 4968 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe 81 PID 4968 wrote to memory of 4808 4968 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe 81 PID 4968 wrote to memory of 4808 4968 1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe"C:\Users\Admin\AppData\Local\Temp\1c1331d4f7122041383d341dc300c79a4537cfd5e06b25afb44aa1da478148a2.exe"1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4968 -
C:\Users\Admin\srfaf.exe"C:\Users\Admin\srfaf.exe"2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:4808
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
264KB
MD5280ec9eec58b337768a7d6abba9b3a85
SHA1a1f212c44aef0b83742f2baeb472b3850e6b3137
SHA2563005b6845135aefb6eff062266c777548bfb61ece9b3dd6cc15d80264a2a1e13
SHA51287288f6d3bacbfb36a1315a288c6b639c89f1f36dcfe6c2ef2ad73dca1c8b04ca2a9e5c46a24980c9edf8ff8e1a8f855cb5ee918f2b86ebecfb8586efafa4fc4
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Filesize
264KB
MD5280ec9eec58b337768a7d6abba9b3a85
SHA1a1f212c44aef0b83742f2baeb472b3850e6b3137
SHA2563005b6845135aefb6eff062266c777548bfb61ece9b3dd6cc15d80264a2a1e13
SHA51287288f6d3bacbfb36a1315a288c6b639c89f1f36dcfe6c2ef2ad73dca1c8b04ca2a9e5c46a24980c9edf8ff8e1a8f855cb5ee918f2b86ebecfb8586efafa4fc4