Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240729-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
01e9ef5cd813c3738e9022a585850003
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SHA1
e2e6b6c2784bbb7e27ba99ae16c2552e9af83e35
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SHA256
d6c6071e9ddf1c01281663073fe2a9fba3d3c4046975becbb0f6f9fa81cab6d3
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SHA512
76249812653272bf4de18bb46b28be191d7fb7806a1275bb14d03c5f75ea0e470a44d526fc0fdd9dfc6b357114f81d094b6c2e346a86fd9d3c5de59a06b294d8
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SSDEEP
6144:9loZM9rIkd8g+EtXHkv/iD4cG69oOJBi+HaIJtM2jb8e1m7i:foZOL+EP8cG69oOJBi+HaIJtMgR
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1320912836599218216/k9bIrB2BiAkyvg4SizCODl9JCoKUOHygFk7krbn0Ivq1zpulxjEGeziuZ3TlgvqeKHZ4
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: 227KB - Virtual size: 226KB
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