Behavioral task
behavioral1
Sample
Big clean script.exe
Resource
win7-20240903-en
General
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Target
Big clean script.exe
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Size
230KB
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MD5
b23d20593d9176d95302568243f60052
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SHA1
fef1aa01b7a41a8255d71309c7c5badf48a7a907
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SHA256
9ff459396b1f4de8dbca8a866ff3b9e4a46c48a9dc1071812a256fe21349caf9
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SHA512
13a9f86ca7b7df87b4174875fb3d7a7552986a6484297c841037b054d3bf01eab724f3b080f9f1984cc58912e0a50953f5d1e2355dca1cc5366eca4870400d3e
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SSDEEP
6144:lloZM+rIkd8g+EtXHkv/iD4M8RobhS6FDAxDeebSzb8e1muQTSi:noZtL+EP8M8RobhS6FDAxDeebIHQz
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1302116602875084831/RE8pHwBeqQmHy6u-JA3iB9wwWRonk7COiIOdHg2mG5gZayOKih7L2v3Q-Z8wvo8zCH11
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 Big clean script.exe
Files
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Big clean script.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: 228KB - Virtual size: 227KB
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