Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win10v2004-20241007-en
General
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Target
Umbral.exe
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Size
231KB
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MD5
2a34868cee558d4409d8fc0ba7739862
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SHA1
ce4ff55f6ff82fec5828fb46216b9932541c03f6
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SHA256
e8857644b82de029a1405a44af687c1fe56b84321dfafa46ebeaefde2c6cc6d2
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SHA512
bb2b020fbb87ffe5f97382aacc3350517c7a65344f84ac06b3323e3590dc0a210eebdddd3bc3c74a099217488f0d836a1ffcb80fa23f60937b916429c7d383ab
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SSDEEP
6144:RloZM+rIkd8g+EtXHkv/iD4jHwtxds8e1mCi:joZtL+EP8rAx0U
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1289644617658011658/iTZE0Rs-278UzjXUjBqtfginmwRUmKFURSWNdKdC5d3CwSQGaWDqt3bbixrvwxBNRTWQ
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: 228KB - Virtual size: 228KB
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