General
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Target
Umbral.exe
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Size
230KB
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MD5
10a62be7829b09b546511cfe6fabb84a
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SHA1
fe599f4244ba26aa9329ee996fe3a612e677df31
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SHA256
9f17ee652fae0bf1a3d12ea84e88526b4aae9fb1e440fdf9669f607f04d84f06
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SHA512
4fbbcb0624d73a662c4aa4f28ba0cb71577d9cf2cb7fd5436e872d8d0341374751c0320252ff0ee756d82c81c106f8c084160f791824974eccb963e4cadea777
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SSDEEP
6144:F1se+uecVM7hTSdm6836MZo+I/r8e1LCS:0H8VQv6MZo+u
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1218668662437712013/H_BvHeUIH_D_PNxdoxE13ootR5Pu6pwvXPRY2yjIfHq2XT4cXk6szskVNKz9WfB8I9DJ
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: 227KB
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