Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240508-en
General
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Target
Umbral.exe
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Size
231KB
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MD5
e9e39a33854ca8af45f6048dd49f265b
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SHA1
d19011ba34adf3135335aa9839d24e1b5c5dde71
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SHA256
e5da8ebc635776269ddceed41b6b6c0860071dafbe121b3fa17e63d01effd26c
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SHA512
703fdc9b9d086329a7273138920904fa0bf3d9917c0db74fcba1853bf1ecd42fd3144725238104e98ebac95f31da5d38551b3f97fb6c72ffdd0c60dbdc4d35cf
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SSDEEP
6144:YOSAnvuqXLUirFMWyW1bYcUNSzNc0jqatc2J8e1mvSTU:vDqyFMWyW1bYcUNSzNc0jqIj2T
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1217768046605766696/gn6PUBb8r8h-ssnZZH9n8QvTpzjMoBR_xyAAZJ3G_7VPtrVhrvMFld8uZyrHHcP957xT
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: 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