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Analysis
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max time kernel
147s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
21/10/2024, 00:15
Static task
static1
Behavioral task
behavioral1
Sample
64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe
Resource
win10v2004-20241007-en
General
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Target
64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe
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Size
680KB
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MD5
64ceec2dcef38331b7f2c149acb471f8
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SHA1
1feceafc771ad6b9138c9faeb30e4d36c221546a
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SHA256
9f1d2a6e48f68ff174717c8330208815a1dbfe1eaa0651cf26bb49b87d07b384
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SHA512
35488366ba764184eb84b7cfdb501140f71e84dd88a59d16ec5d894bf26d6c11d8690c493001d35b609a7724ded132276a3a1b757d2705b308ab48716ca03ed3
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SSDEEP
6144:Cuqzvs2HD6NtJwjuNXKtnjpDmzm/tBoA8Pa0HgA0oKxkriQu5qKna:6Dozwju1KHDZlBsarxCiQuBa
Malware Config
Signatures
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\omomywul = "\"C:\\Windows\\yswfenys.exe\"" explorer.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.
flow ioc 29 ipecho.net -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 1536 set thread context of 3632 1536 64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe 84 -
Drops file in Windows directory 2 IoCs
description ioc Process File opened for modification C:\Windows\yswfenys.exe explorer.exe File created C:\Windows\yswfenys.exe explorer.exe -
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 64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language explorer.exe -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 4584 vssadmin.exe -
Modifies Internet Explorer Phishing Filter 1 TTPs 3 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Internet Explorer\PhishingFilter explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0" explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0" explorer.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 2924 vssvc.exe Token: SeRestorePrivilege 2924 vssvc.exe Token: SeAuditPrivilege 2924 vssvc.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 1536 wrote to memory of 3632 1536 64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe 84 PID 1536 wrote to memory of 3632 1536 64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe 84 PID 1536 wrote to memory of 3632 1536 64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe 84 PID 1536 wrote to memory of 3632 1536 64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe 84 PID 3632 wrote to memory of 4584 3632 explorer.exe 101 PID 3632 wrote to memory of 4584 3632 explorer.exe 101 -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\64ceec2dcef38331b7f2c149acb471f8_JaffaCakes118.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1536 -
C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"2⤵
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies Internet Explorer Phishing Filter
- Suspicious use of WriteProcessMemory
PID:3632 -
C:\Windows\SYSTEM32\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet3⤵
- Interacts with shadow copies
PID:4584
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2924
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
680KB
MD52507b6d48b0ea79589db0f1ae3c5519e
SHA1712f2f6f86afebe3eff5a5429c6084eaf1996c54
SHA256044c15c5615fd998214c5bdf51dc86ea5ba90956b2df7ef66ac0e04e4234d7eb
SHA512f092950308270a532a2d0c7b54b33012af529393f026511d0d5409f9bab8ae2eac1f0a926a801d30cb464fab7344e60f6801fb89ba637d96774e39173a8e2605