Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20231215-en
General
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Target
Umbral.exe
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Size
231KB
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MD5
a270d4041c245aec5deeed971fba0e6e
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SHA1
b9cacd5e11108f37def65b4f17281fa658dde5ef
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SHA256
34ab1f6b7597b68d9799a803d61a8b07ab4221a887cc038c7dff132d857c26f1
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SHA512
8c6361c0aca08058bbc3862801247c4516f99bb0935e05ad314e4ee0f9d5eefb41017ba28e5743188b9c68c6495f6a7e3142152aa40737d6955f80b81f626453
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SSDEEP
6144:RloZM+rIkd8g+EtXHkv/iD4CiRrQBPUon9WvRsY9jfy8e1mFmi:joZtL+EP8DRrQBPUon9WvRsY9MeL
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1204944287041847307/aoa_S28cr8V4g11xswAZC9SdvRJS8ygczDK-GfItmMFXCcL2edroJI5lraSE-OISlf6d
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