General
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Target
CrypticBootstrapper.exe
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Size
235KB
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MD5
6ead93b6a9556b1fb06864131b2f5593
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SHA1
fa1b1a247aa197036c94667e9f3c0ed8d79a22bc
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SHA256
2c00e70fba3fc1ba12f7651d73a23c1294c684c507742c754f9460ecdcdf5fc6
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SHA512
8a388cdcb275afd74b1f7320f8d0882847ae88a949924603022e7e7c6dd855f8004166119f7f3a9aff54ff83ce0264dd25d17338071e4137e6a25a5ce2764202
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SSDEEP
6144:rloZMLrIkd8g+EtXHkv/iD4HbmedLocDXabtIExfHb8e1mILKpi:poZ0L+EP8HbmedLocDXabtIExrfKw
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1336012954751074346/s-2r1rw6Qf41BcZv_7OjI5QVrTSNTj1H7yJOQ3Bagg6KUq1r4V3820PsyRH18GihXCaE
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 CrypticBootstrapper.exe
Files
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CrypticBootstrapper.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: 6KB - Virtual size: 5KB
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