General
- Target umbra bootstrapper wow updated.exe
- Size 3.4MB
- Sample260709-crhzvscy2w
- SHA256 2c3dd9e946d7b3456da1b09ee3b1d0ff5c42dd26b6b7d6a7d2e318e45015c6ca
- MD5 3be57deac1eba54699106c8f254c691f
- SHA1 740a853474b64748a92170aeac0068139c9b7d58
- SHA512 dd2c8dc20a6ce64714b4233efbaf19b1b7cf1e66d23218d5b10518e107b3f769472cd897c29e740451bed8eacc8641859c5ef7e17e6f3916e18a691ec1a6b507
- SSDEEP 98304:6EhtGDWshVODAqS5yw5BoOZzAw3Oxb3WYAhde74ZV/v:6Ehtm3yDNSt5hzW3zAhdCEV/v
- TLSH T1A7F53394869DEAA6F07A1770F82A8767E7DD8CF0447AC7375A24FE344731C74AE62020
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Behavioral task
behavioral1
Sample
umbra bootstrapper wow updated.exe
Resource
win10ltsc2021-20260513-en
22 signatures
900 seconds
Malware Config
Targets
-
- Target umbra bootstrapper wow updated.exe
- Size 3.4MB
- SHA256 2c3dd9e946d7b3456da1b09ee3b1d0ff5c42dd26b6b7d6a7d2e318e45015c6ca
- MD5 3be57deac1eba54699106c8f254c691f
- SHA1 740a853474b64748a92170aeac0068139c9b7d58
- SHA512 dd2c8dc20a6ce64714b4233efbaf19b1b7cf1e66d23218d5b10518e107b3f769472cd897c29e740451bed8eacc8641859c5ef7e17e6f3916e18a691ec1a6b507
- SSDEEP 98304:6EhtGDWshVODAqS5yw5BoOZzAw3Oxb3WYAhde74ZV/v:6Ehtm3yDNSt5hzW3zAhdCEV/v
- TLSH T1A7F53394869DEAA6F07A1770F82A8767E7DD8CF0447AC7375A24FE344731C74AE62020
- MD5 SHA1 SHA512 SSDEEP TLSH
Score9/10-
Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Looks for VirtualBox Guest Additions in registry
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Looks for VMWare Tools registry key
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Loads dropped DLL
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Checks whether UAC is enabled
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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.
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Maps connected drives based on registry
Disk information is often read in order to detect sandboxing environments.
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Suspicious use of NtSetInformationThreadHideFromDebugger