Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240903-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
50bc3bab2a3553f7b55fbc5a6fa1275f
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SHA1
83f6672fee979dec40ee154519c9cd7d3aa79bb4
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SHA256
f3073b18151ae854112999b803ef10b70447d908a3cb0b2c27e91740a3fb2370
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SHA512
a0c0b1d7b2e9dae8c1e4315b2002eaf2caddd3639986f053f3874e7e7c715e60d20f4893d0b456d7289503146ace6fde934e1f807b5483ff28a592bfac55d150
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SSDEEP
6144:lloZMHrIkd8g+EtXHkv/iD4SZ+lTwk7+iTlwsJOhK28e1mmi:noZIL+EP8SZ+lTwk7+iTlwsJIw
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1304869873616158792/oC9aHmFlv9ZgkIDRefrcCbX3_k49Jr7drOR1znBQsU6LxlU1xlLRxaATv2EJOYZ9eqal
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 Umbral.exe
Files
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Umbral.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