Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240903-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
5444f7a053eeaaa3c692956387aa3103
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SHA1
2a93270e874dff5f0490ab00affa8b004e08690b
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SHA256
71cd23078dcdf0969521dae9d9a9dd51b4a266b3fb74b709126d778e345497c1
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SHA512
14c214c4911a67d5330493a657f1033305bbd6c94f8ca6f13c0a1f1da6eb55ab7c5f3423dabcdcdcb7e3592e9149190f35667cfb4369f8325f079b97cfe946cc
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SSDEEP
6144:tloZM+rIkd8g+EtXHkv/iD4zSa9uMzvEJlwOffuIbb8e1maETi:voZtL+EP8zSa9uMzvEJlwOffuaf
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1353033738350755841/tKW_B-3Z95avdVOerDu4ITNJVRnk9P-ltXw3cgTOmZP49hF__17ZJpESm2o4gJnDkDVu
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