General
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Target
Umbral.exe
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Size
229KB
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MD5
5ec6cda5b85ebfb0f92c52746a8dd01f
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SHA1
0653b964a484e3c73877440f7366c0b477f4dbc0
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SHA256
cfa411af1d47bc7a40db5d2e085c8a8612c4d0eafb6bd3e2b03ec9ee93231b7d
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SHA512
0d357a50125de49172d0e672450e915c4e5ec121fbc22ab36146d23bfa23037549e31df9afcadfa0bbea6431eeb68ce02a40cf450c864808191018c94ddda73d
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SSDEEP
6144:lloZMUrIkd8g+EtXHkv/iD4amR+0ad1+H7mEl5QnIb8e1mBi:noZrL+EP8amR+0ad1+H7mEl5Qwb
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1178425579918348299/Im2YsHcysTWH3zzMC7dhoPY9LKT5g7uo_sPn8PhgJQlrkCDQumDskxS71Udatyw5CYuR
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