Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240215-en
General
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Target
Umbral.exe
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Size
227KB
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MD5
352d7bc3f16944c271e510f0bfad2b71
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SHA1
fb31618e42f6beecf323f045f8453e7ecb67f0ea
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SHA256
18b39864c478ca8d947a0b08e48965402477064b4c6975831f18b141d2a1d21f
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SHA512
c69b31c6d74dbd6342e857a2411c96af670022831ce48000385ec05a07f9465e24878eeefbdd6f26f7f9ef34a6b2e8501523151a38f63dc51294e7f280bdaf0f
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SSDEEP
6144:+loZM+rIkd8g+EtXHkv/iD4nAaBJX8QfF+nJUg1vbb8e1mUMi:ooZtL+EP8nAaBJX8QfF+nJUg1XFF
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1245448172436721717/Bkdu-x06BGUQbFzh0vM16H3yT_3yoXWRwoNsxvlyChXcLKWGdmsFpN85Lbd4wBNm2fuY
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: 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