Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240705-en
General
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Target
Umbral.exe
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Size
231KB
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MD5
37040bc6e02b555d9062631211678bc9
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SHA1
cb2f4548ce9bd51ce42301ffa74130d9c6098ad5
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SHA256
3294164d79836fe3765e57e50dd0ac898164ccc049f097fb2deb2725478aa583
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SHA512
e5db52931152bef14e1dda82288a1f4265d79c4c4ad08f143994b2b60b2b530dfbcdcb1468bd70e5799a55b2a4f02565249e0d41944032bbd43a296757d9754c
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SSDEEP
6144:RloZM+rIkd8g+EtXHkv/iD4FxEe9rI8jB67NokR4cb8e1mtqpui:joZtL+EP8FxEe9rI8jB67NokRxuqR
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1270032462076182559/b8wi9cfMdsx4v72a9Wyf8VdQSJy1Kwdvjyc1PALcINFs2LLbaB5jd030GBMtjUk07Yz9
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: 228KB - Virtual size: 228KB
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