Behavioral task
behavioral1
Sample
Umbral.exe
Resource
win7-20230621-en
General
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Target
Umbral.zip
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Size
88KB
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MD5
9db04c7541a60c7e0c8888199f0172f7
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SHA1
10d5fad0a7072fc523ae1e5c06ca9168af557495
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SHA256
54f3524bd85f2a9d6633f8442039e2cf49d206c29ef660e650c7137d2d9b451d
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SHA512
64cc574a904c98d274c1de823fd45d677d0e7b211615c905c8a86e85ceb98a293819ad3af6536f84cb9964a21759dd66fdc5c94dae8e2c3475989501bea90087
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SSDEEP
1536:LSPx+7toK0lqafjxnXH5vDJtI0joR1S3qLeFuCNqwGN1v1rKr5GFeBetbOLC+Xv0:LSCoKt2l35vDJtI71+DZREN+dGFeBmOo
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1118307538878861323/J0SDDb7E4iJhAhWja-iuNQiTDJIbNf3i2RZ4oL_SdjbJT8703fY7aAgUtUtZ25FeJTyg
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule static1/unpack001/Umbral.exe family_umbral -
Umbral family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource unpack001/Umbral.exe
Files
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Umbral.zip.zip
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Umbral.exe.exe windows 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