General
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Target
CrypticBootstrapper.exe
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Size
235KB
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MD5
6a8d9640dcb9e7b51794c51e55cab5ff
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SHA1
dcb26de3de2b816e231162e1f73837ec94389e85
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SHA256
42f2488da10b923080e378bb6a992a10e8fdb1631023e272d849a0c9d240d73d
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SHA512
60b54772d14656f050f228a68446d0344136d861acfb13c59556f12072c0a455a0f589834da17feb962293917262d6ec0d3ed6b6d14904b377b842eb389cd96e
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SSDEEP
6144:jloZMcrIkd8g+EtXHkv/iD4dpPtDHdmOh8U9va6vnrRb8e1m/bi:BoZzL+EP8fPtDHdmOh8U9va6vn9s2
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1336703586125746186/805EPsSUzTijUYmnONcE-QH4YQ7aUftiUsMOcKdpAUAAyrAJCCqU0pcxF_bCPGF2Vtxi
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