General
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Target
Umbral.exe
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Size
229KB
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MD5
1c34c800baf35d1e3434531040d07139
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SHA1
c483bf994bc40f2f66dd3767df3c327c205301ee
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SHA256
7faa7dc741f6cbee158e99306c59f254e878236501f8cca5d6c29ed2c2029f2a
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SHA512
6f30a725e7eb759af2fdadfa10edf8daecd3c4c129571308db55cc19f969bac3f4ddd350d1831ca8f9eb1b7471617de9750b3aba92559299f1c688be2fccad07
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SSDEEP
6144:lloZM+rIkd8g+EtXHkv/iD4ZfcHzZqStTY5rWWDPzb8e1mMti:noZtL+EP8ZfcHzZqStTY5rWWDvdk
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1258073166559973548/Af-anEOYadVQiNhuvW-Noyq5-b2RQLfjfpRQfpLyzOtY6g3BbSzURaD2_9z4RWreg7zX
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