Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240215-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
518a530502d5793fddad2cf074af8850
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SHA1
6ff6542721e9cf284129daf442c193911dda8367
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SHA256
c9284451e9c756e38ee65feed1db743bc535066136851e71c707402607e06501
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SHA512
232768823683c549468b0a11122a4c4831d528ad5861f1930714d9c7840405ac3fb145e7a8d85a3b14d6f92d93e41be692176755fb590bdfb6295cd80788c545
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SSDEEP
6144:lloZM+rIkd8g+EtXHkv/iD4deC+pNbYMTgqL9Y0hBpb8e1meIi:noZtL+EP8deC+pNbYMTgqL9Y0h/R
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1237112288494747648/RwLhzmD0ehxDiBdZsbgoSXVKoOkldpfaRP7ikjkQV9Ya8EVVXay-1UF3yarrrtlSnrpv
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