Behavioral task
behavioral1
Sample
booststrapper.exe
Resource
win7-20240708-en
General
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Target
booststrapper.exe
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Size
231KB
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MD5
2bb0fafc29a110fc1b08a2999e29a7ae
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SHA1
10c76fd141b1a2c3a74a134cdf4166d44cf3507a
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SHA256
b467810a9eaab64b217e6a0cf61e2f13efe7e8e211b9d11a47c06218b48badce
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SHA512
d4006ab772424a4b5288fdfa368f47c35ddf3f5cefd741766ee19465fa4d29f99c044cbc8334f5f4df61ec17251b7ab377df8078e44ff725b6d86a0a4888ac62
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SSDEEP
6144:RloZM+rIkd8g+EtXHkv/iD445IbGELnsFd42X3Wjwb8e1mtPi:joZtL+EP845IbGELnsFd42X3Wkoa
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1266560686910210209/d3vvIxQt0MkoZ-7n4Mcq_GsmTXpbbRTQ7C5846FbdfcZJud-GBI07CWoejq2if6od4xm
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 booststrapper.exe
Files
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booststrapper.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