Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
Umbral.exe
Resource
win10v2004-20231222-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
f7aea1fe85b23a400c7415f2b52720fc
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SHA1
fa483aa9e04b67c9cd0a2210e2f2e7f332aa5f93
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SHA256
1e9eb60c3b4040412e7713b686e520a24c0aec6119018ef942fe314e571f55d8
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SHA512
fd45fc156c8b74ed718b2c40c9b06ba4c20e5e9ca32e0a4eb033587791320f6c469f88f9e76cc4f9beb38782db9ec8d41ff4030a5dc0f7bf05cbcffd4ff36629
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SSDEEP
6144:lloZMHrIkd8g+EtXHkv/iD4ZlCMVjgULJyD1Ac5tqb8e1m5i:noZIL+EP8ZlCMVjgULJyD1Ac5sL
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1192617650090692748/hok5NVgoTBHsU4H9gfFwRgZXcT97ag8ppQZZk_ZKk0THom5fhO6_lJse8wEGqoitVStK
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