General
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Target
Umbral.exe
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Size
230KB
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MD5
553d6d65dbaee07e841b22b0987c0331
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SHA1
499325af4eb554638411e3e47b146cc8662f693a
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SHA256
d97cfbdcbd68d0080286dde7cb1906e84c954d5471f08ba98608c5f3b6af3f2d
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SHA512
e4b3c0b1211ce292eb7a781e98da5960936e28abd84f473c66105217e9de505f89fee1b46ac776953403d0aa433d47226c3f0b6dbfd5dd3cc7b4a44058964e96
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SSDEEP
6144:dloZM+rIkd8g+EtXHkv/iD4mEHhtxds8e1minfi:/oZtL+EP8Trx86
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1273654743541219463/LiRtpjZrXJ-Jq6D6rmaHPRqkGmJ-O6FGNmo8-PwElrHuhnARicowKD2I8Ei3JuuXkhNp
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: 227KB
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