General
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Target
SolaraBootstrapper.exe
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Size
227KB
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MD5
3df60645e1fab0830497343a441e96bc
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SHA1
723f7a7db3e06127316e6c9123a87bc3ac892385
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SHA256
2cc3ac0eab2157304e19038e2893fcecd9b4cd3e7b4bfb40da1ffcc2d11b0702
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SHA512
dce3d11268cc766ad82420657a0eb0f763d7062021c593d259aa2a9176a2712e02ee1038103417c3547575e6c4db3571adc6fe22d5497c67be93f11a21020285
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SSDEEP
6144:MloZM+rIkd8g+EtXHkv/iD4IZcoSQPL4xBECDjahIb8e1mwi:KoZtL+EP8IZcoSQPL4xBECDjauG
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1256707538683035678/EePYt7RbAhPdLaFgzN0BmlIUYqtzwXE9fMCWCzfISbeAMcgs0i3fOfzEzTVVTY6R8tRd
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: 2KB - 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