General
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Target
Umbral.exe
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Size
229KB
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MD5
95b54ca0a6742f2b35c4b16215a691e0
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SHA1
81840a84816bb1fed04289470b2f7f144c830589
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SHA256
a526a0732206548456573538c31e6f5b050c7ed8ebdf3e63e6acfaa77a766182
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SHA512
2b4758ae67a972b7801db9d6fd1ee26ff3a3c399f03019541c06a71d49e7582b9901aa83f9d0f831c4dd6c27d18e0d1032f255f746d8c85fc011d9c59b3df526
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SSDEEP
6144:6loZM+9EB1/SqctonEPfCqAdKq9gji8e1mu6:EoZQdSqcwvUq2kO
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1209542310099157102/rO88KSrY6i_l0V_XKqkrJ2fNW4I6M1A2EIwnw-FUW9CplqknvRpSHANTBN-Cq_ZJLfCq
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