General
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Target
Umbral.exe
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Size
495KB
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MD5
582bc7b05114af523db760bc2380ec80
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SHA1
54b26ee9d7cd0f922d5e851696099c4b6fa849f2
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SHA256
751dee488d8148db816da1f2326e37e579c116f76e4f8cdf21a25d1f85e74ffe
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SHA512
9643b236e15cb9364a1e9cdd322d16d101a9ee804f958565c95037e18fae94d687c2c0c6e7cb776b00aac55e052ef1decce46189b35ffdce8dca74f910b39777
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SSDEEP
6144:vloZM+rIkd8g+EtXHkv/iD4zyPvRDAmB5KW/Cwhl0zjb8e1m0iDc:NoZtL+EP8zyPvRDAmB5KW/Cwhl076
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1300771808978665563/EvKrgWbAK7yHUuWxSc5FEsBgobFenskn3viAqiBdAAnSaFNWdP4H4VihPWTesZ6FKRkC
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: 228KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 266KB - Virtual size: 265KB
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