Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20231020-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
a1d134ca35650fc8eb5029168dc77cf2
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SHA1
2d7d11e799d0fd81c6809e214fc0319fe0a3ae1b
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SHA256
e8051ca4e2624241ecf48c61e9bfd61e9d1f6cf6fb4cda85eba361edf853b289
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SHA512
b4a027c3d286cab99b588fafb82f372ff9e244b657e8909e6454cb23d690ceef8cbb687174fa9877f1cff0f2543cf680ebf175670eb653845749671905f01c4c
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SSDEEP
6144:lloZMArIkd8g+EtXHkv/iD4leoRDJ6idZIJbGmTDPb8e1mVi:noZHL+EP8leoRDJ6idZIJbGmTv/
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1166448531620515903/XozfZZDGmd0o6fPRfcsmuT0s-rn0ExHYfB1DeokQzQQlk-Zydtqw9Zqyohf3hj1L2WOA
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
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