Behavioral task
behavioral1
Sample
nitro tools/nitro.exe
Resource
win7-20240903-en
General
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Target
nitro tools 1.1.rar
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Size
100KB
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MD5
254aefe10fbebafb6e3b679388c12804
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SHA1
3a1f8a9aca3980e1989680ba4ee75bb8bc0b99c4
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SHA256
6c6da4b4abbff60565c105df74c4945474e08de70bc0feb7fbb13a157b1fbac2
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SHA512
2df66b0c4a3d32385f732191251e50e8abd2872268396cc6e015e3c296db466b4fa84602280c0e791bd1bf29da93ab3defa6cfa25a9f4ffe3223be9151dc9820
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SSDEEP
3072:qCrvnGpoocaqG1wRpTywo6cgcR8bUOaPevmlmivqE:lipoL28pTWucR84OaYUmeD
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1278735524693016678/rVaJ6RIY-ETw1qf7ojTh_6jWaVGdg2fBRNXv386RU_0FL_w3ueO8Kp_DbYxSHjD5WZEw
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule static1/unpack001/nitro tools/nitro.exe family_umbral -
Umbral family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource unpack001/nitro tools/nitro.exe
Files
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nitro tools 1.1.rar.rar
Password: 11
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nitro tools/nitro.exe.exe windows:4 windows x86 arch:x86
Password: 11
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: 251KB - Virtual size: 251KB
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