Behavioral task
behavioral1
Sample
umbralstealer.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
umbralstealer.exe
Resource
win10v2004-20240802-en
General
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Target
umbralstealer.exe
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Size
229KB
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MD5
83b81dda82a62350b52ee97a12d3163a
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SHA1
3e7c9d5eda676771071fa77ce8f357b0c32673fa
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SHA256
b8e51135b2e0a124ac1103a9c4a6f2353d289ffe99611d990c291ae356950ecf
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SHA512
e0d0d47479b19287dbb731b0025c458623fa17e77d506756a7e90289abf0c04faa5e655bd2f521ead68d3c8530cb4ecaf1cb1c48e1fe2e03759affe8c0c4ca04
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SSDEEP
6144:lloZM9fsXtioRkts/cnnK6cMlxDKxX8il927De8NhoREb8e1muoi:noZXtlRk83MlxDKxX8il927De8NhoOJ
Malware Config
Extracted
umbral
https://discordapp.com/api/webhooks/1255559936801505321/F16TxDgiVb4tKqsfAw7kSt9qou7bWLQdaPsbR0XxnHZlQkf-pez1a9ar1lSBOFFaTwYN
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 umbralstealer.exe
Files
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umbralstealer.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