Behavioral task
behavioral1
Sample
SolaraBootstrapper.exe
Resource
win7-20231129-en
General
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Target
SolaraBootstrapper.exe
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Size
227KB
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MD5
666f6194638d6e82977e48cbb6c69558
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SHA1
df3cdcf3a47544982d88b3a8ee6c499ebab2b4f2
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SHA256
f25954c0bee0de252c3148d22de7b37780124b0065cebf09cfca2fce9fbef080
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SHA512
dd9f868fcdae3205ca1714390a1dbe8c598e1c16e785cb2491bbb45e444a9f2fe3a04d0b4004c1c1575090c610241857439e2c29f8e82ec3b060700bb3e4e177
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SSDEEP
6144:+loZMLrIkd8g+EtXHkv/iD4wDvr7ByalogRj++70vb8e1muzri:ooZ0L+EP8wDvr7ByalogRj++7mZm
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1257737196249546872/R24Zy6YccyLoO_MD7z8FFaFj7KRRoLCIbwCl-iHMD-88Z3JC2qelppMGula7wZB3C-Bj
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