General
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Target
Umbral.exe
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Size
229KB
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MD5
258ee0671cfbdfc017c50b7bb77b965f
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SHA1
aa7a991a81bff5d276525ca1224dc24f4e497168
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SHA256
185cff1b051d1389bc9cc2c50a4988e32f78f476696f61a0ae6fcd0bc33628af
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SHA512
9243436b0a880f85fed7f1e9cc9f1b624e62a500574ebcf92a2b8b20a256cd4961623b9731ea94532031023e164ab509569119f043d9e4559f1bee7851eddabc
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SSDEEP
6144:tloZMLrIkd8g+EtXHkv/iD446LAS3tW+xukt/qqfrwb8e1mai:voZ0L+EP8/LAS3tW+xukt/qqfsY
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1254439863764258868/Kbm1jabUQG6PkrHnu5QVqs2RvZi5ZQRuTb7ilsDK0o5Ii-ks8YHzjUSo-XH7hXzWOndY
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