Firefox Installer[.]exe

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General

Target

Firefox Installer.exe
Size

341KB
MD5

44445ea81707dbf9280e47c6e21f40e5
SHA1

15b1831a8aed0aee485f7f1378210a5e891d3353
SHA256

a2469029c67e195aac3b28809fa1a1b03cbd95f0dde4acdd2107c09ed5b394bc
SHA512

2140a3d66c4b46b2ac19617e99b830463873763683d02b70e85dd3b31b2496502fbbbf0bca4f641fba6bd6077aa8fe359a03e968e16a305d59cecf12fc448e93
SSDEEP

6144:FaVWdyzOxeA1DfdwX3MmIOxGv+o503juZMKs/pai3ibOWu3V+DeLcIadcgKNce5A:FMROxdDfOnMmXxGvxrZG/5ibOfVGeLc9

Score

7^/10

upx

Malware Config

Signatures

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
sample	upx

Files

Firefox Installer.exe
.exe windows x86

Password: infected

Code Sign

0c:e7:e0:e5:17:d8:46:fe:8f:e5:60:fc:1b:f0:30:39
Certificate

Issuer

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

10/11/2006, 00:00

Not After

10/11/2031, 00:00

Subject

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

04:09:18:1b:5f:d5:bb:66:75:53:43:b5:6f:95:50:08
Certificate

Issuer

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

22/10/2013, 12:00

Not After

22/10/2028, 12:00

Subject

CN=DigiCert SHA2 Assured ID Code Signing CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

0c:1c:d3:ee:a4:7e:dd:a7:a0:32:57:3b:01:4d:0a:fd
Certificate

Issuer

CN=DigiCert SHA2 Assured ID Code Signing CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

09/04/2021, 00:00

Not After

19/06/2024, 23:59

Subject

CN=Mozilla Corporation,OU=Firefox Engineering Operations,O=Mozilla Corporation,L=Mountain View,ST=California,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

7e:89:b9:df:00:6b:d1:aa:4c:48:d8:65:03:96:34:ca
Certificate

Issuer

CN=Dummy

Not Before

01/01/2013, 07:00

Not After

02/01/2013, 07:00

Subject

CN=Dummy

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

07:36:37:b7:24:54:7c:d8:47:ac:fd:28:66:2a:5e:5b
Certificate

Issuer

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

23/03/2022, 00:00

Not After

22/03/2037, 23:59

Subject

CN=DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA,O=DigiCert\, Inc.,C=US

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5a
Certificate

Issuer

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

01/08/2022, 00:00

Not After

09/11/2031, 23:59

Subject

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

0c:4d:69:72:4b:94:fa:3c:2a:4a:3d:29:07:80:3d:5a
Certificate

Issuer

CN=DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA,O=DigiCert\, Inc.,C=US

Not Before

21/09/2022, 00:00

Not After

21/11/2033, 23:59

Subject

CN=DigiCert Timestamp 2022 - 2,O=DigiCert,C=US

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature

50:48:e7:ee:62:9c:d3:c7:0d:5e:18:72:fb:d3:8a:52:b2:7d:84:04:ba:85:28:80:1b:be:0a:45:90:76:d3:52
Signer

Actual PE Digest

50:48:e7:ee:62:9c:d3:c7:0d:5e:18:72:fb:d3:8a:52:b2:7d:84:04:ba:85:28:80:1b:be:0a:45:90:76:d3:52

Digest Algorithm

sha256

PE Digest Matches

true

Signature Validations

Trusted

true

Verification

Signing Certificate

CN=Mozilla Corporation,OU=Firefox Engineering Operations,O=Mozilla Corporation,L=Mountain View,ST=California,C=US

14/02/2023, 07:26
Valid: true

Chain 1

CN=Mozilla Corporation,OU=Firefox Engineering Operations,O=Mozilla Corporation,L=Mountain View,ST=California,C=US

CN=DigiCert SHA2 Assured ID Code Signing CA,OU=www.digicert.com,O=DigiCert Inc,C=US

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Headers

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE

Sections

UPX0
Size: - Virtual size: 144KB

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

UPX1
Size: 64KB - Virtual size: 68KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 63KB - Virtual size: 64KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
out.upx
.exe windows x86

Headers

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE

Sections

.text
Size: 105KB - Virtual size: 105KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 16KB - Virtual size: 15KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 2KB - Virtual size: 10KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 63KB - Virtual size: 63KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

Password: infected

Code Sign

0c:e7:e0:e5:17:d8:46:fe:8f:e5:60:fc:1b:f0:30:39Certificate

Key Usages

04:09:18:1b:5f:d5:bb:66:75:53:43:b5:6f:95:50:08Certificate

Extended Key Usages

Key Usages

0c:1c:d3:ee:a4:7e:dd:a7:a0:32:57:3b:01:4d:0a:fdCertificate

Extended Key Usages

Key Usages

7e:89:b9:df:00:6b:d1:aa:4c:48:d8:65:03:96:34:caCertificate

Extended Key Usages

Key Usages

07:36:37:b7:24:54:7c:d8:47:ac:fd:28:66:2a:5e:5bCertificate

Extended Key Usages

Key Usages

0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5aCertificate

Key Usages

0c:4d:69:72:4b:94:fa:3c:2a:4a:3d:29:07:80:3d:5aCertificate

Extended Key Usages

Key Usages

50:48:e7:ee:62:9c:d3:c7:0d:5e:18:72:fb:d3:8a:52:b2:7d:84:04:ba:85:28:80:1b:be:0a:45:90:76:d3:52Signer

Signature Validations

Verification

14/02/2023, 07:26 Valid: true

Chain 1

Headers

File Characteristics

Sections

UPX0 Size: - Virtual size: 144KB

UPX1 Size: 64KB - Virtual size: 68KB

.rsrc Size: 63KB - Virtual size: 64KB

Headers

File Characteristics

Sections

.text Size: 105KB - Virtual size: 105KB

.rdata Size: 16KB - Virtual size: 15KB

.data Size: 2KB - Virtual size: 10KB

.rsrc Size: 63KB - Virtual size: 63KB

0c:e7:e0:e5:17:d8:46:fe:8f:e5:60:fc:1b:f0:30:39
Certificate

04:09:18:1b:5f:d5:bb:66:75:53:43:b5:6f:95:50:08
Certificate

0c:1c:d3:ee:a4:7e:dd:a7:a0:32:57:3b:01:4d:0a:fd
Certificate

7e:89:b9:df:00:6b:d1:aa:4c:48:d8:65:03:96:34:ca
Certificate

07:36:37:b7:24:54:7c:d8:47:ac:fd:28:66:2a:5e:5b
Certificate

0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5a
Certificate

0c:4d:69:72:4b:94:fa:3c:2a:4a:3d:29:07:80:3d:5a
Certificate

50:48:e7:ee:62:9c:d3:c7:0d:5e:18:72:fb:d3:8a:52:b2:7d:84:04:ba:85:28:80:1b:be:0a:45:90:76:d3:52
Signer

14/02/2023, 07:26
Valid: true

UPX0
Size: - Virtual size: 144KB

UPX1
Size: 64KB - Virtual size: 68KB

.rsrc
Size: 63KB - Virtual size: 64KB

.text
Size: 105KB - Virtual size: 105KB

.rdata
Size: 16KB - Virtual size: 15KB

.data
Size: 2KB - Virtual size: 10KB

.rsrc
Size: 63KB - Virtual size: 63KB