Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240903-en
General
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Target
Umbral.exe.zip
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Size
97KB
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MD5
db8e5bd880a5d7e6e70e0e2fab4d5f54
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SHA1
9ade829655a11b6a9ad5e195082740b14beef3e5
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SHA256
f99bfa12c4d77132272330c8d2b2bcc2c928a24fa82d867c5c2025e1c2dea214
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SHA512
a53a1392d8e0352ed17617c303c28eb42c207646e081b69fd7f2c4389f8eab95c608b3775731d95635f4aa270d3a641a41e8ccc7c5247d50bf6e4017cbc4a1a1
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SSDEEP
3072:ld4Q2UYzc3GkWBkNyfMfnPVxixEe97J10IOMXpaW:lCQ2BzjDkMfMXXixEeR+cpaW
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1250780098433388594/-tW28G3oEjwMYE0wFWQK2ljLBzIQ65-6TZYsA2YWJ0-2c3Z0lHciqIN38kTaLF174s1B
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule static1/unpack001/Umbral.exe.bin family_umbral -
Umbral family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource unpack001/Umbral.exe.bin
Files
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Umbral.exe.zip.zip
Password: infected
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Umbral.exe.bin.exe windows:4 windows x86 arch:x86
f34d5f2d4577ed6d9ceec516c1f5a744
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 228KB - Virtual size: 228KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 6KB - Virtual size: 5KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ