Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20240221-en
General
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Target
Umbral.exe
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Size
229KB
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MD5
ba04373492e8c5f6d1f99b6ec7740f26
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SHA1
3439a5130e17f4ce9262fdab17c4f6756bf660af
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SHA256
477d5477a087cd32a0fab03952ffcfbcfb3b179f91bb1378858b355731365933
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SHA512
38decc359b6b03373b0cc227d5a29bbcffa0ce1df5608be378f443223ce0e5bce5efea247ae30c9652a4fd374c47ea79b423024a5f7fcac56a83599c4bab8336
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SSDEEP
6144:lloZM+rIkd8g+EtXHkv/iD4XCleywvrYDhkijD6WFFi4a8e1kAi:noZtL+EP8XCleywvrYDhkijD6aF2U
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1212893249027575880/FKouRBLEewPR9XUv6qjrw3YBJkMPE4li_CiLy5xm-0n0EVPkOida9ryqE_ZDG7vV_5ur
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