7559e6ca8b77400f88bf4e67208a1c32570a670068eccae9e3d226cc5471bd47

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18-04-2024 19:05

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02-03-2024 10:05

Analysis

max time kernel
1786s
max time network
1565s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
02-03-2024 10:05

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General

Target

bazaar.2020.02/HEUR-Backdoor.Win32.exe
Size

43KB
MD5

f3cbdffbf6bfc26fe09f95e88b188c09
SHA1

e8feb8d7baa1290f591693f068cd6941cb9c878c
SHA256

1c659cbf8f73b2dd0ed8238595c225dbc1e87d5ea538c24a5d52faf0f4a49e7d
SHA512

bac9cc4ebde8e1133d8a332c327dcc72ef83f3457b3048899be3550c7d1c03c8c59d0ab82304def44793ac9fc91a193a018e6fbb256681b5baad366df4e8b3b3
SSDEEP

768:VrgeWGJaj2b2/K6/1CSGIKPlavRzY0nEs3UgLM6KLi0z1xxFopI:ybs4K6dyNPIvRMEEgCnxipI

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

Stpxrq.exeStpxrq.exe

pid process

1744 Stpxrq.exe
3048 Stpxrq.exe
Loads dropped DLL 1 IoCs

Processes:

Stpxrq.exe

pid process

1744 Stpxrq.exe
Creates a Windows Service
persistence

pid	process
1744	Stpxrq.exe
3048	Stpxrq.exe

pid	process
1744	Stpxrq.exe

Drops file in System32 directory 5 IoCs

Processes:

Stpxrq.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\0DA515F703BB9B49479E8697ADB0B955_786387CC77858B88BA3234B304062475	Stpxrq.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CF14D1855652602540DFCFECD21854DB_71F4740D37287A91812B9479338ACF24	Stpxrq.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CF14D1855652602540DFCFECD21854DB_71F4740D37287A91812B9479338ACF24	Stpxrq.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	Stpxrq.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\0DA515F703BB9B49479E8697ADB0B955_786387CC77858B88BA3234B304062475	Stpxrq.exe

Drops file in Program Files directory 2 IoCs

Processes:

HEUR-Backdoor.Win32.exe

description	ioc	process
File created	C:\Program Files (x86)\Microsoft Qizfbz\Stpxrq.exe	HEUR-Backdoor.Win32.exe
File opened for modification	C:\Program Files (x86)\Microsoft Qizfbz\Stpxrq.exe	HEUR-Backdoor.Win32.exe

Modifies data under HKEY_USERS 64 IoCs

Processes:

Stpxrq.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-d9-37-fd-29-2d\WpadDecisionReason = "1"	Stpxrq.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-d9-37-fd-29-2d\WpadDecision = "0"	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\CRLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\CA\CRLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\trust\Certificates	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\trust\CRLs	Stpxrq.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	Stpxrq.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f012c000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	Stpxrq.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{30D50AEC-DD7D-4392-ACA3-54FA2CB9F4B9}	Stpxrq.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\CRLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\trust\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\SmartCardRoot\CRLs	Stpxrq.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Classes\Local Settings\MuiCache\2D\52C64B7E\LanguageList = 65006e002d0055005300000065006e0000000000	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	Stpxrq.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{30D50AEC-DD7D-4392-ACA3-54FA2CB9F4B9}\WpadDecisionReason = "1"	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\SmartCardRoot\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\Certificates	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	Stpxrq.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{30D50AEC-DD7D-4392-ACA3-54FA2CB9F4B9}\WpadNetworkName = "Network 3"	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\CRLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\My	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\SmartCardRoot\Certificates	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\trust\CRLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	Stpxrq.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	Stpxrq.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{30D50AEC-DD7D-4392-ACA3-54FA2CB9F4B9}\WpadDecisionTime = 1052be4e896cda01	Stpxrq.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-d9-37-fd-29-2d\WpadDecisionTime = 1052be4e896cda01	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\CA\Certificates	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	Stpxrq.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	Stpxrq.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{30D50AEC-DD7D-4392-ACA3-54FA2CB9F4B9}\WpadDecision = "0"	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-d9-37-fd-29-2d	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{30D50AEC-DD7D-4392-ACA3-54FA2CB9F4B9}\9a-d9-37-fd-29-2d	Stpxrq.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	Stpxrq.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\CRLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\trust\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	Stpxrq.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\Certificates	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Root\Certificates	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Policies\Microsoft\SystemCertificates\CA\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\Disallowed\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\SystemCertificates\TrustedPeople\CTLs	Stpxrq.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	Stpxrq.exe

Suspicious behavior: RenamesItself 1 IoCs

Processes:

HEUR-Backdoor.Win32.exe

pid process

1588 HEUR-Backdoor.Win32.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

HEUR-Backdoor.Win32.exe

description pid process

Token: SeDebugPrivilege 1588 HEUR-Backdoor.Win32.exe

pid	process
1588	HEUR-Backdoor.Win32.exe

description	pid	process
Token: SeDebugPrivilege	1588	HEUR-Backdoor.Win32.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

Stpxrq.exe

description	pid	process	target process
PID 1744 wrote to memory of 3048	1744	Stpxrq.exe	Stpxrq.exe
PID 1744 wrote to memory of 3048	1744	Stpxrq.exe	Stpxrq.exe
PID 1744 wrote to memory of 3048	1744	Stpxrq.exe	Stpxrq.exe
PID 1744 wrote to memory of 3048	1744	Stpxrq.exe	Stpxrq.exe

C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\HEUR-Backdoor.Win32.exe
"C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\HEUR-Backdoor.Win32.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
PID:1588

C:\Program Files (x86)\Microsoft Qizfbz\Stpxrq.exe
"C:\Program Files (x86)\Microsoft Qizfbz\Stpxrq.exe"
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1744

C:\Program Files (x86)\Microsoft Qizfbz\Stpxrq.exe
"C:\Program Files (x86)\Microsoft Qizfbz\Stpxrq.exe" Win7
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:3048

Network

MITRE ATT&CK Matrix

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Downloads

C:\Program Files (x86)\Microsoft Qizfbz\Stpxrq.exe
Filesize
43KB

MD5
f3cbdffbf6bfc26fe09f95e88b188c09

SHA1
e8feb8d7baa1290f591693f068cd6941cb9c878c

SHA256
1c659cbf8f73b2dd0ed8238595c225dbc1e87d5ea538c24a5d52faf0f4a49e7d

SHA512
bac9cc4ebde8e1133d8a332c327dcc72ef83f3457b3048899be3550c7d1c03c8c59d0ab82304def44793ac9fc91a193a018e6fbb256681b5baad366df4e8b3b3

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