General
- Target siema.exe
- Size 98.4MB
- Sample260826-g99mrazyhs
- SHA256 5659d8f7553ea84864429087585fa089685620846ebc06b46d79eee09bea035d
- MD5 4217a6d36b6b3f967f084a6df3b174ab
- SHA1 2b2371c81b9101a8eb9ec25ec1ca47efae30d924
- SHA512 fd43c2c17a250fc20ee441054c2675d7876836bb966b5e410d80f9d74d4d91d58a2c58179ae80d57d3540d809ce7cf4bb6577283473c2ffbb1cc27e91eac41aa
- SSDEEP 3145728:hjJ3DZtrio2iASc/iFN0/kd0xeDhvqvc3uFha:hpD7ivcPPDLOh
- TLSH T1EE383391AF663647F046CA33A5D4AF3895E321341FE24A8F17D947A230735CAD9BA331
- MD5 SHA1 SHA512 SSDEEP TLSH
Behavioral task
behavioral1
Sample
siema.exe
Resource
win10v2004-20260513-en
Behavioral task
behavioral2
Sample
siema.exe
Resource
win10ltsc2021-20260513-en
Behavioral task
behavioral3
Sample
siema.exe
Resource
win11-20260513-en
Behavioral task
behavioral4
Sample
siema.exe
Resource
win11ltsc2024-20260709-en
Malware Config
Targets
-
- Target siema.exe
- Size 98.4MB
- SHA256 5659d8f7553ea84864429087585fa089685620846ebc06b46d79eee09bea035d
- MD5 4217a6d36b6b3f967f084a6df3b174ab
- SHA1 2b2371c81b9101a8eb9ec25ec1ca47efae30d924
- SHA512 fd43c2c17a250fc20ee441054c2675d7876836bb966b5e410d80f9d74d4d91d58a2c58179ae80d57d3540d809ce7cf4bb6577283473c2ffbb1cc27e91eac41aa
- SSDEEP 3145728:hjJ3DZtrio2iASc/iFN0/kd0xeDhvqvc3uFha:hpD7ivcPPDLOh
- TLSH T1EE383391AF663647F046CA33A5D4AF3895E321341FE24A8F17D947A230735CAD9BA331
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Renames multiple (145) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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Executes dropped EXE
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Loads dropped DLL
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Modifies system executable filetype association
-
Adds Run key to start application
-
Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
-
Checks system information in the registry
System information is often read in order to detect sandboxing environments.
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
2Change Default File Association
1Component Object Model Hijacking
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
2Change Default File Association
1Component Object Model Hijacking
1