Behavioral task
behavioral1
Sample
Umbral1.exe
Resource
win7-20240221-en
General
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Target
Umbral1.exe
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Size
231KB
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MD5
8b87bf1f0e629ac52ed3ea11d93e2985
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SHA1
e89c68857a7478e1fe5a0846ef637284e1603bc6
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SHA256
0d0f238dfc7639c39bbd97db3e29bc62f5da11b5242ce594eafef6c5ebc15b30
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SHA512
d431b338536a879bf6ea50142936a8d05b4ebc5785a53e35f28a0f393744d17d987a0d63597a13273a9f36308537c6e23c02f197447f4a72a911dda715651180
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SSDEEP
6144:xloZM9rIkd8g+EtXHkv/iD41FRzAmB5KG/Cwhl0OGb8e1mOSi:DoZOL+EP81FRzAmB5KG/Cwhl0NN
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1209932890964496414/f0ORMB5uEI_SJlyjGuV0Ujxzj-K8et6_5tqY47Cuda-yKUjAsRLxtuDKzgte_h48lcZY
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 Umbral1.exe
Files
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Umbral1.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