bazarbackdoor | ZoomInstallerFull[.]exe

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General

Target

ZoomInstallerFull.exe
Size

68.4MB
MD5

425d6675bb7c2d30b979388ecbeeb957
SHA1

920e8421a883b4f636b42affc0be0426abd2a63b
SHA256

f349d03e10fb84b20b9b8d35b717cc37ae1c8673a9bc48db452586d7e485debc
SHA512

5b8fe3f0dd50f76b2020d1fbf90149f4869b57a7d4a0e3f2036924340c618b101bb103b4a49cf019ccfc1ecff3355dfb04767d44c7e4e2e86b2834939344daec
SSDEEP

1572864:i6PnNv5zRIwDrcyhXCbCorKC8w41gcy+4dwl2bwHlGNB1lYeGh/:i6PnNDrcy9CHmDwwtEdwywe9YT

Score

10^/10

bazarbackdoor

Malware Config

Signatures

Bazar/Team9 Backdoor payload 1 IoCs

Processes:

resource yara_rule

sample BazarBackdoorVar3
Bazarbackdoor family
bazarbackdoor

resource	yara_rule
sample	BazarBackdoorVar3

Files

ZoomInstallerFull.exe
.exe windows x64

a7a6de676accacc9c6194dd3dcd2737f

Code Sign

0f:d1:bb:ca:79:6b:d7:f8:dd:4c:82:e1:0a:9a:96:31
Certificate

Issuer

CN=DigiCert High Assurance EV Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

13-01-2022 00:00

Not After

09-11-2031 23:59

Subject

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

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

0e:4d:67:f6:43:16:c9:2a:3b:7a:17:cc:46:97:6a:8f
Certificate

Issuer

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

Not Before

28-07-2021 00:00

Not After

27-07-2036 23:59

Subject

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

03:52:b2:0a:a2:1e:c4:97:01:50:46:c6:d4:51:5a:57
Certificate

Issuer

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

Not Before

10-02-2023 00:00

Not After

15-06-2023 23:59

Subject

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

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

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

0f:d1:bb:ca:79:6b:d7:f8:dd:4c:82:e1:0a:9a:96:31
Certificate

Issuer

CN=DigiCert High Assurance EV Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Not Before

13-01-2022 00:00

Not After

09-11-2031 23:59

Subject

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

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

0e:4d:67:f6:43:16:c9:2a:3b:7a:17:cc:46:97:6a:8f
Certificate

Issuer

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

Not Before

28-07-2021 00:00

Not After

27-07-2036 23:59

Subject

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

03:52:b2:0a:a2:1e:c4:97:01:50:46:c6:d4:51:5a:57
Certificate

Issuer

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

Not Before

10-02-2023 00:00

Not After

15-06-2023 23:59

Subject

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

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

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

18:7b:30:ca:c9:53:ab:2f:16:25:d5:33:5a:82:0c:34:42:43:00:25
Signer

Actual PE Digest

18:7b:30:ca:c9:53:ab:2f:16:25:d5:33:5a:82:0c:34:42:43:00:25

Digest Algorithm

sha1

PE Digest Matches

true

Signature Validations

Trusted

true

Verification

Signing Certificate

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

20-03-2023 13:19
Valid: true

Chain 1

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

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

Chain 2

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

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

CN=DigiCert High Assurance EV Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Chain 3

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

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

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

8e:69:cf:01:00:be:81:3d:d3:97:e9:78:ad:8c:55:1b:52:3b:08:60:6d:8f:d6:18:d3:c1:24:70:85:1a:85:11
Signer

Actual PE Digest

8e:69:cf:01:00:be:81:3d:d3:97:e9:78:ad:8c:55:1b:52:3b:08:60:6d:8f:d6:18:d3:c1:24:70:85:1a:85:11

Digest Algorithm

sha256

PE Digest Matches

true

Signature Validations

Trusted

true

Verification

Signing Certificate

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

20-03-2023 13:18
Valid: true

Chain 1

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

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

Chain 2

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

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

CN=DigiCert High Assurance EV Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Chain 3

SERIALNUMBER=4969967,CN=Zoom Video Communications\, Inc.,O=Zoom Video Communications\, Inc.,L=San Jose,ST=California,C=US,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.2=#130844656c6177617265,1.3.6.1.4.1.311.60.2.1.3=#13025553

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA256 2021 CA1,O=DigiCert\, Inc.,C=US

CN=DigiCert Trusted Root G4,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

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

kernel32

VirtualFree
VirtualAlloc
IsProcessorFeaturePresent
lstrlenW
GetSystemDirectoryW
GetModuleHandleA
lstrcatW
GetVersionExA
GetProcAddress
LoadLibraryExW
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
ReleaseSemaphore
InitializeCriticalSection
WaitForSingleObject
GetLastError
SetEvent
CloseHandle
ResetEvent
CreateSemaphoreA
CreateEventA
WideCharToMultiByte
MultiByteToWideChar
FreeLibrary
GetModuleFileNameW
FormatMessageW
LocalFree
SetLastError
CreateFileW
SetFileTime
SetFileAttributesW
RemoveDirectoryW
GetModuleHandleW
CreateDirectoryW
DeleteFileW
SetCurrentDirectoryW
GetCurrentDirectoryW
GetTempPathW
GetTickCount
GetCurrentThreadId
GetCurrentProcessId
GetFileInformationByHandle
FindClose
FindFirstFileW
FindNextFileW
GetFileAttributesW
GetFileSize
SetFilePointer
ReadFile
WriteFile
SetEndOfFile
GetCurrentProcess
GetProcessAffinityMask
GetSystemInfo
GlobalMemoryStatusEx
GetStdHandle
GetCommandLineW
CreateProcessA
GetExitCodeProcess
CreateThread
ExitThread
FreeLibraryAndExitThread
GetModuleHandleExW
HeapFree
HeapAlloc
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
IsDebuggerPresent
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
ExitProcess
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
GetSystemTimeAsFileTime
LCMapStringW
HeapReAlloc
GetProcessHeap
IsValidCodePage
GetACP
GetOEMCP
GetCPInfo
GetStringTypeW
HeapSize
GetStartupInfoW
QueryPerformanceCounter
InitializeSListHead
RtlUnwindEx
RtlPcToFileHeader
RaiseException
EncodePointer
WriteConsoleW
SetFilePointerEx
GetConsoleMode
GetConsoleCP
FlushFileBuffers
GetFileType
SetStdHandle
FreeEnvironmentStringsW
GetEnvironmentStringsW
GetCommandLineA
FindFirstFileExW

user32

MessageBoxW
LoadStringW
CharUpperA
CharUpperW

shell32

ShellExecuteExA

oleaut32

VariantClear
SysAllocStringLen
SysStringLen

Sections

.text
Size: 171KB - Virtual size: 170KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 68KB - Virtual size: 67KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 6KB - Virtual size: 19KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 10KB - Virtual size: 10KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

_RDATA
Size: 512B - Virtual size: 244B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 44KB - Virtual size: 43KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 3KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

a7a6de676accacc9c6194dd3dcd2737f

Code Sign

0f:d1:bb:ca:79:6b:d7:f8:dd:4c:82:e1:0a:9a:96:31Certificate

Extended Key Usages

Key Usages

0e:4d:67:f6:43:16:c9:2a:3b:7a:17:cc:46:97:6a:8fCertificate

Extended Key Usages

Key Usages

03:52:b2:0a:a2:1e:c4:97:01:50:46:c6:d4:51:5a:57Certificate

Extended Key Usages

Key Usages

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

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

0f:d1:bb:ca:79:6b:d7:f8:dd:4c:82:e1:0a:9a:96:31Certificate

Extended Key Usages

Key Usages

0e:4d:67:f6:43:16:c9:2a:3b:7a:17:cc:46:97:6a:8fCertificate

Extended Key Usages

Key Usages

03:52:b2:0a:a2:1e:c4:97:01:50:46:c6:d4:51:5a:57Certificate

Extended Key Usages

Key Usages

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

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

18:7b:30:ca:c9:53:ab:2f:16:25:d5:33:5a:82:0c:34:42:43:00:25Signer

Signature Validations

Verification

20-03-2023 13:19 Valid: true

Chain 1

Chain 2

Chain 3

8e:69:cf:01:00:be:81:3d:d3:97:e9:78:ad:8c:55:1b:52:3b:08:60:6d:8f:d6:18:d3:c1:24:70:85:1a:85:11Signer

Signature Validations

Verification

20-03-2023 13:18 Valid: true

Chain 1

Chain 2

Chain 3

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

user32

shell32

oleaut32

Sections

.text Size: 171KB - Virtual size: 170KB

.rdata Size: 68KB - Virtual size: 67KB

.data Size: 6KB - Virtual size: 19KB

.pdata Size: 10KB - Virtual size: 10KB

_RDATA Size: 512B - Virtual size: 244B

.rsrc Size: 44KB - Virtual size: 43KB

.reloc Size: 3KB - Virtual size: 2KB

0f:d1:bb:ca:79:6b:d7:f8:dd:4c:82:e1:0a:9a:96:31
Certificate

0e:4d:67:f6:43:16:c9:2a:3b:7a:17:cc:46:97:6a:8f
Certificate

03:52:b2:0a:a2:1e:c4:97:01:50:46:c6:d4:51:5a:57
Certificate

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

0f:d1:bb:ca:79:6b:d7:f8:dd:4c:82:e1:0a:9a:96:31
Certificate

0e:4d:67:f6:43:16:c9:2a:3b:7a:17:cc:46:97:6a:8f
Certificate

03:52:b2:0a:a2:1e:c4:97:01:50:46:c6:d4:51:5a:57
Certificate

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

18:7b:30:ca:c9:53:ab:2f:16:25:d5:33:5a:82:0c:34:42:43:00:25
Signer

20-03-2023 13:19
Valid: true

8e:69:cf:01:00:be:81:3d:d3:97:e9:78:ad:8c:55:1b:52:3b:08:60:6d:8f:d6:18:d3:c1:24:70:85:1a:85:11
Signer

20-03-2023 13:18
Valid: true

.text
Size: 171KB - Virtual size: 170KB

.rdata
Size: 68KB - Virtual size: 67KB

.data
Size: 6KB - Virtual size: 19KB

.pdata
Size: 10KB - Virtual size: 10KB

_RDATA
Size: 512B - Virtual size: 244B

.rsrc
Size: 44KB - Virtual size: 43KB

.reloc
Size: 3KB - Virtual size: 2KB