Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20241010-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
6f99ad653049306925da44b34fd12011
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SHA1
df5d265397a6895efa77bed1478e79784cba7954
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SHA256
e14be40bad2e07456140fee37d8ca380811886c1c89b0b6e21e8b0f2a33ed663
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SHA512
89c9c171f1684cab8bd55b971cd69b9370f49d7da743f848b99d68523b89e2810ab033c4f26d539240d185186f72549bfb422b9c65cd7cf5c00f781693b569b8
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SSDEEP
6144:FloZM+rIkd8g+EtXHkv/iD4YD5JR/k4XRG/BcoN2Nb8e1mFi:HoZtL+EP8YD5JR/k4XRG/BcoNW/
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1320373019788709958/grKutKImeSMKAobU3qwqZ5oRo3wj5DJYl9VHxg5Zgp_1o843EeDBvDw0n9iXEfY8rcS1
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