Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240903-en
General
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Target
Umbral.exe
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Size
230KB
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MD5
cd32fdd05be451dcebaa04ed226b417d
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SHA1
2ee53c0439df3d1d490df3ae4ae392d1b3bdde4f
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SHA256
f255a381ef85b1da243ce96a36362bf08fe313ff0666e58e40430bbbd365e3f3
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SHA512
b76af4ff2da8a31dda4b8d32b5eec349862f1b1c75d8806f4dbbbe46e7de899162cd5f79d857766fb934b8ad56f1e9b6e836cba78d1e9f0374d0fc97568e65e4
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SSDEEP
6144:1loZM+rIkd8g+EtXHkv/iD4IbGlW0b3cwNImHHm4ib8e1mbi:XoZtL+EP8IbGlW0b3cwNImHHm/R
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1339982673241706538/f-BJJ5qmT-ltXOQbDx4efeUtexL9l1vE-1JCDj8rq5rFwJZYvkhBHAbZC_7PtEFXQL20
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule sample family_umbral -
Umbral family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource Umbral.exe
Files
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Umbral.exe.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: 227KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1KB - Virtual size: 1KB
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