General
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Target
Umbral.exe
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Size
227KB
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MD5
79dced4f6539dd4227811d59442b199a
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SHA1
6d343935fbe5a18f2bf5ed5bfde76020976c2a58
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SHA256
4b1086479acbffef9ad56bb1af174eb2c41ced446aa85e6cc51330d87397bb3c
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SHA512
1965b33fdfce24dfe54a5b2733d2ec84059860e0b68cca3ea4b1eb4c3f6b74c824ea50f3845244d02918d7185922bebc66a7560a12b5a61ef2651a5793b72049
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SSDEEP
6144:+loZML9EB1/SqctonEPfCqAjdymlX8k7k+btUgJ0Lh8e1mGmj+:ooZhdSqcwvjdymlX8k7k+btUgJ0Vv1
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1218668662437712013/H_BvHeUIH_D_PNxdoxE13ootR5Pu6pwvXPRY2yjIfHq2XT4cXk6szskVNKz9WfB8I9DJ
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: 224KB - Virtual size: 224KB
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