Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win10-20240221-en
Behavioral task
behavioral2
Sample
Umbral.exe
Resource
win10v2004-20240221-en
General
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Target
Umbral.exe
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Size
231KB
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MD5
24a8f91902c7af34071b1f843bee6b56
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SHA1
2b2bf367c47e11277766b5ac8c80ecbb75966b29
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SHA256
b3ae664a5ff979c45c5a78cb506f61f4073f33b9d72c4db82ff395b4a3dcfc9f
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SHA512
60ca4cfbb90254d00ed5bc15d105ea4e3b6f426c95c65855636dabe738a5e4f026b7eab1ffc5f31178dbd3ff34d26f3d4a634a2e64b222a540f01a4bf243fc16
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SSDEEP
6144:xloZM+rIkd8g+EtXHkv/iD4plbJ8il92iDe8NhoV5tB48e1mFEi:DoZtL+EP87bJ8il92iDe8NhoNAY
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1208849029887426590/bz0f4dkckByrsaOSzlxmDV7s4IuQ4t1yLw5jBVZ1Vr7G3ix2nLgZS0fOLRtAKdWnqpY1
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: 228KB
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