General
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Target
SolaraBootstrapper.exe
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Size
227KB
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MD5
1a713cc368d9a6b8ccd99ff52a2fa3e0
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SHA1
5228e724740b06daa74a33c5e0441c5444731ea4
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SHA256
680989424c4c59046fc69b1d1bddfc72adaed80a0f12c29b42bc444d2fec3f04
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SHA512
82db4d706ff886dfde04d72f8a9bdc00922e2ace82c2113a59a06b54b9270d272b065be061258075564ef8e40b6b827ce4be5080f9d606cd73859097d495ee2d
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SSDEEP
6144:+loZM+rIkd8g+EtXHkv/iD4phSDMS1Nmlzus9x4MGb8e1mOi:ooZtL+EP8phSDMS1Nmlzus9x4z0
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1274910211135766631/qFJlIUMxwpuzYQjXRS603PqYXhqj5-4aUZBPGcfptaN4WIFJ6ZgsJUKw7l8GFk_pltYg
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 SolaraBootstrapper.exe
Files
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SolaraBootstrapper.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: 224KB - Virtual size: 224KB
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