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Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
Umbral.exe
Resource
win10-20231215-en
Behavioral task
behavioral3
Sample
Umbral.exe
Resource
win10v2004-20231215-en
General
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Target
Umbral.exe
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Size
231KB
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MD5
2bd5664afed4d5821041e61b19f55a30
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SHA1
8d0f1ea431c0e00b39898a05f4ae37ac55800703
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SHA256
5e0dce9978369a90f9380c4630f79b2801dd0251f699bee7d7b85f43c51f027e
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SHA512
991066a886a2fd36246d1fe88a7c62cb6672a7c8821c94a4b1c8df650968a39aa0f1519451d569b9b478a30cd3465fda32da69816b5ce86bd95ccd9a7d781fe7
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SSDEEP
6144:RloZM+rIkd8g+EtXHkv/iD4+B/RkqNlOcLWU1pAN8b8e1mKi:joZtL+EP8+B/RkqNlOcLWU1pAa4
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1204001041151164457/58E_8BYTbBaL7TinEq1fpWbHhcPMLkT4TgEE7gNN2nbqFlJil4PT-CZHLYhATtVyr6XM
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