Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20231129-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
23f649b9914154a95545d1d882006fd9
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SHA1
50ef26e9ab8be10d8972fc36aaee1bad0766c8db
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SHA256
422b393c43488dfeb747caea3c825e7ee6a8c38197029804b28f8f3ea2cd9e86
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SHA512
4416da36dc6259b97f3fed52247a7d9468d1b51e4c2d9a556f0b8c78f74da070e6b533ba7eca0a93480e1323b22700ca897db3077ba4755a9374ee942c73f4e9
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SSDEEP
6144:tloZM+rIkd8g+EtXHkv/iD4r6rzKInDAHZMK7bCC6cEIet8e1mVi:voZtL+EP8erzKInDAHZMK7bCJIgX
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1215660939534409778/O-7q8htFZRr1Xd_iWLJjzUw2KG4fzOCNA3GjdDVyCQjWzREAs22cNLnes7o8fqgLD50P
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