Behavioral task
behavioral1
Sample
Guna.UI2.dll
Resource
win7-20240705-en
Behavioral task
behavioral2
Sample
Guna.UI2.dll
Resource
win10v2004-20240802-en
Behavioral task
behavioral3
Sample
Nyxstrap.exe
Resource
win7-20240704-en
General
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Target
Nyx RBX Launcher.zip
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Size
5.3MB
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MD5
624f0d405528164e07be372cb8ccbfeb
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SHA1
53598a01c36c05e9bfc78b2c314ce5256c4c541c
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SHA256
5c7b7cf6c7d2a0a9a0f896f0e415df9bafd848d286c20c2a24a2415904b418cb
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SHA512
3675cdeb3fad339b830391dc8c5f5b2781df2f33778f0b5fc09837a5f2b6985f2a5b6bfc96fba9baf8b09a2e34d6acc9f431d0d6ebd7f1dba15762271ac3f729
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SSDEEP
98304:G96ayDIqRmo+eOWazcRSGIkCRXEPhhkeYIZGZqyVunKMfPoA7itOGi6:G6ayPS//USGIkXhtk8n5fPo8o
Malware Config
Signatures
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resource yara_rule static1/unpack001/Nyxstrap.exe themida -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource unpack001/Nyxstrap.exe
Files
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Nyx RBX Launcher.zip.zip
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Guna.UI2.dll.dll windows:4 windows x86 arch:x86
dae02f32a21e03ce65412f6e56942daa
Code Sign
7a:98:1b:7d:3e:b4:86:bb:45:84:c4:3c:c9:a8:3f:dbCertificate
IssuerCN=Sobatdata Root CANot Before23/10/2019, 05:22Not After22/10/2025, 17:00SubjectCN=Sobatdata Software0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5aCertificate
IssuerCN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=USNot Before01/08/2022, 00:00Not After09/11/2031, 23:59SubjectCN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=USKey Usages
KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign
07:36:37:b7:24:54:7c:d8:47:ac:fd:28:66:2a:5e:5bCertificate
IssuerCN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=USNot Before23/03/2022, 00:00Not After22/03/2037, 23:59SubjectCN=DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA,O=DigiCert\, Inc.,C=USExtended Key Usages
ExtKeyUsageTimeStamping
Key Usages
KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign
0a:7a:4a:88:9e:c9:99:42:90:06:63:38:4d:86:97:9dCertificate
IssuerCN=DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA,O=DigiCert\, Inc.,C=USNot Before29/03/2022, 00:00Not After14/03/2033, 23:59SubjectCN=DigiCert Timestamp 2022 - 2,O=DigiCert\, Inc.,C=USExtended Key Usages
ExtKeyUsageTimeStamping
Key Usages
KeyUsageDigitalSignature
53:fe:48:3a:4e:3f:2b:3b:e3:71:7e:2b:07:d1:02:37:21:e1:7a:86Signer
Actual PE Digest53:fe:48:3a:4e:3f:2b:3b:e3:71:7e:2b:07:d1:02:37:21:e1:7a:86Digest Algorithmsha1PE Digest MatchestrueHeaders
DLL Characteristics
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_DLL
PDB Paths
Guna.UI2.pdb
Imports
mscoree
_CorDllMain
Sections
.text Size: 3.8MB - Virtual size: 3.8MB
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
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Nyxstrap.exe.exe windows:4 windows x86 arch:x86
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Sections
Size: 1.2MB - Virtual size: 1.2MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
Size: 1024B - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.idata Size: 512B - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 1KB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.themida Size: - Virtual size: 5.5MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.boot Size: 3.2MB - Virtual size: 3.2MB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ