General
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Target
Umbral Builder.exe
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Size
212KB
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MD5
f76077bc0ab1e9ba4abd4ee74e481631
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SHA1
56368f4d35276298a8f11f3e6d30044a2bcb1cf7
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SHA256
e147fd2cd1d20698a2245593f3edfe9fd2ddd8c136cc01ba915ec0469bc6864c
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SHA512
c7e314dcf72c78d15c449f469b9c7f8df2a2af676be6f97095eaa160a1e9392befd472bc528f9f0834979a86e8ea8b676cd066332ca61d25a9c170948417e17b
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SSDEEP
3072:PmpcjvqySgPAm+D9Cocawot18PeX4UD7oNHki0sMXSl8eN7s2fVXzcGTSY1:KcWoPA1Rrt181I7oNHk7y8eNYupS
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1117450544399786015/OU4UNpw4R5_qFtBmmTNa-SvSSxk2W8uPd6S_1NvOKdhKc_1nBmkhOSTmAG0s86S6Ykdz
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 Builder.exe
Files
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Umbral Builder.exe.exe windows 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: 210KB - Virtual size: 210KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1024B - Virtual size: 960B
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