Analysis
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max time kernel
150s -
max time network
129s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
27-01-2023 20:30
Static task
static1
Behavioral task
behavioral1
Sample
vbc.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
vbc.exe
Resource
win10v2004-20220812-en
General
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Target
vbc.exe
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Size
24KB
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MD5
28cfc00452c4e3e6c0082fdca3c520fc
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SHA1
1260166c856aee0225371c7ab269f3a228cf8fb5
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SHA256
93b17c9c6d764b7e218d2d1669e8bd68059da3fe346936071b012d22d52fb35e
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SHA512
8413d173f55e5fe9d8fd415fd1f9e76358916ee1de5d1e6dbab3a1b18b0848011e76f7a2ee332f4fca64e8dcb26a8d1492c8d1ebe9ad165eba84c8dda6065af8
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SSDEEP
96:IEfPqlezZjTldKYgr+Doo+HzQLCmNeit3l/kSw6k7l6xiRQe3T3erAo00wGvzNt:IEfPql6VpJ/oGlL/kHH7l6Ej7e
Malware Config
Signatures
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Detects Smokeloader packer 3 IoCs
resource yara_rule behavioral2/memory/1296-145-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/1296-146-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader behavioral2/memory/1296-147-0x0000000000400000-0x0000000000409000-memory.dmp family_smokeloader -
SmokeLoader
Modular backdoor trojan in use since 2014.
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Executes dropped EXE 3 IoCs
pid Process 1700 AB72.exe 1272 AB72.exe 3396 AB72.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation AB72.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation vbc.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Uses the VBS compiler for execution 1 TTPs
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Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 explorer.exe Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 explorer.exe Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 explorer.exe Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AB72.exe Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AB72.exe Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AB72.exe -
Adds Run key to start application 2 TTPs 3 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Lbjfpqx = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zkevyyhtxab\\Lbjfpqx.exe\"" vbc.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ahtkr = "\"C:\\Users\\Admin\\AppData\\Roaming\\Smdfrkwdiko\\Ahtkr.exe\"" AB72.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nEdENIr = "C:\\Users\\Admin\\AppData\\Roaming\\nEdENIr\\nEdENIr.exe" AB72.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 99 api.ipify.org 100 api.ipify.org -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3168 set thread context of 1296 3168 vbc.exe 92 PID 1700 set thread context of 3396 1700 AB72.exe 103 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI vbc.exe Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI vbc.exe Key enumerated \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI vbc.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4724 powershell.exe 4724 powershell.exe 3168 vbc.exe 3168 vbc.exe 3168 vbc.exe 3168 vbc.exe 1296 vbc.exe 1296 vbc.exe 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 512 Process not Found -
Suspicious behavior: MapViewOfSection 13 IoCs
pid Process 1296 vbc.exe 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found 512 Process not Found -
Suspicious use of AdjustPrivilegeToken 7 IoCs
description pid Process Token: SeDebugPrivilege 3168 vbc.exe Token: SeDebugPrivilege 4724 powershell.exe Token: SeDebugPrivilege 1700 AB72.exe Token: SeDebugPrivilege 772 powershell.exe Token: SeShutdownPrivilege 512 Process not Found Token: SeCreatePagefilePrivilege 512 Process not Found Token: SeDebugPrivilege 3396 AB72.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3396 AB72.exe -
Suspicious use of WriteProcessMemory 53 IoCs
description pid Process procid_target PID 3168 wrote to memory of 4724 3168 vbc.exe 81 PID 3168 wrote to memory of 4724 3168 vbc.exe 81 PID 3168 wrote to memory of 4724 3168 vbc.exe 81 PID 3168 wrote to memory of 1524 3168 vbc.exe 90 PID 3168 wrote to memory of 1524 3168 vbc.exe 90 PID 3168 wrote to memory of 1524 3168 vbc.exe 90 PID 3168 wrote to memory of 1080 3168 vbc.exe 91 PID 3168 wrote to memory of 1080 3168 vbc.exe 91 PID 3168 wrote to memory of 1080 3168 vbc.exe 91 PID 3168 wrote to memory of 1296 3168 vbc.exe 92 PID 3168 wrote to memory of 1296 3168 vbc.exe 92 PID 3168 wrote to memory of 1296 3168 vbc.exe 92 PID 3168 wrote to memory of 1296 3168 vbc.exe 92 PID 3168 wrote to memory of 1296 3168 vbc.exe 92 PID 3168 wrote to memory of 1296 3168 vbc.exe 92 PID 512 wrote to memory of 1700 512 Process not Found 93 PID 512 wrote to memory of 1700 512 Process not Found 93 PID 512 wrote to memory of 1700 512 Process not Found 93 PID 512 wrote to memory of 3644 512 Process not Found 94 PID 512 wrote to memory of 3644 512 Process not Found 94 PID 512 wrote to memory of 3644 512 Process not Found 94 PID 512 wrote to memory of 3644 512 Process not Found 94 PID 512 wrote to memory of 3472 512 Process not Found 95 PID 512 wrote to memory of 3472 512 Process not Found 95 PID 512 wrote to memory of 3472 512 Process not Found 95 PID 512 wrote to memory of 5012 512 Process not Found 96 PID 512 wrote to memory of 5012 512 Process not Found 96 PID 512 wrote to memory of 5012 512 Process not Found 96 PID 512 wrote to memory of 5012 512 Process not Found 96 PID 512 wrote to memory of 3140 512 Process not Found 97 PID 512 wrote to memory of 3140 512 Process not Found 97 PID 512 wrote to memory of 3140 512 Process not Found 97 PID 1700 wrote to memory of 772 1700 AB72.exe 98 PID 1700 wrote to memory of 772 1700 AB72.exe 98 PID 1700 wrote to memory of 772 1700 AB72.exe 98 PID 512 wrote to memory of 4848 512 Process not Found 100 PID 512 wrote to memory of 4848 512 Process not Found 100 PID 512 wrote to memory of 4848 512 Process not Found 100 PID 512 wrote to memory of 4848 512 Process not Found 100 PID 512 wrote to memory of 2108 512 Process not Found 101 PID 512 wrote to memory of 2108 512 Process not Found 101 PID 512 wrote to memory of 2108 512 Process not Found 101 PID 1700 wrote to memory of 1272 1700 AB72.exe 102 PID 1700 wrote to memory of 1272 1700 AB72.exe 102 PID 1700 wrote to memory of 1272 1700 AB72.exe 102 PID 1700 wrote to memory of 3396 1700 AB72.exe 103 PID 1700 wrote to memory of 3396 1700 AB72.exe 103 PID 1700 wrote to memory of 3396 1700 AB72.exe 103 PID 1700 wrote to memory of 3396 1700 AB72.exe 103 PID 1700 wrote to memory of 3396 1700 AB72.exe 103 PID 1700 wrote to memory of 3396 1700 AB72.exe 103 PID 1700 wrote to memory of 3396 1700 AB72.exe 103 PID 1700 wrote to memory of 3396 1700 AB72.exe 103 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AB72.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AB72.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\vbc.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3168 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4724
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C:\Users\Admin\AppData\Local\Temp\vbc.exeC:\Users\Admin\AppData\Local\Temp\vbc.exe2⤵PID:1524
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C:\Users\Admin\AppData\Local\Temp\vbc.exeC:\Users\Admin\AppData\Local\Temp\vbc.exe2⤵PID:1080
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C:\Users\Admin\AppData\Local\Temp\vbc.exeC:\Users\Admin\AppData\Local\Temp\vbc.exe2⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:1296
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C:\Users\Admin\AppData\Local\Temp\AB72.exeC:\Users\Admin\AppData\Local\Temp\AB72.exe1⤵
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1700 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==2⤵
- Suspicious use of AdjustPrivilegeToken
PID:772
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C:\Users\Admin\AppData\Local\Temp\AB72.exeC:\Users\Admin\AppData\Local\Temp\AB72.exe2⤵
- Executes dropped EXE
PID:1272
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C:\Users\Admin\AppData\Local\Temp\AB72.exeC:\Users\Admin\AppData\Local\Temp\AB72.exe2⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:3396
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
- Accesses Microsoft Outlook profiles
PID:3644
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵PID:3472
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵PID:5012
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵PID:3140
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵PID:4848
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵PID:2108
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1KB
MD53a9188331a78f1dbce606db64b841fcb
SHA18e2c99b7c477d06591a856a4ea3e1e214719eee8
SHA256db4137e258a0f6159fda559a5f6dd2704be0582c3f0586f65040c7ad1eb68451
SHA512d1a994610a045d89d5d306866c24ae56bf16555414b8f63f632552568e67b5586f26d5a17a1f0a55ada376730298e6d856e9161828d4eae9decfa4e015e0e90a
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Filesize
1KB
MD54280e36a29fa31c01e4d8b2ba726a0d8
SHA1c485c2c9ce0a99747b18d899b71dfa9a64dabe32
SHA256e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359
SHA512494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4
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Filesize
53KB
MD506ad34f9739c5159b4d92d702545bd49
SHA19152a0d4f153f3f40f7e606be75f81b582ee0c17
SHA256474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba
SHA512c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92
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Filesize
16KB
MD555f19b3fe95df191f14e36784330408e
SHA16410fee868aa0f5a3e830cd8246f97879e6616b9
SHA25609b2aca520343d5fc3ba33120b240e321d46527ac0e02ddd11a6cd2e8f32f812
SHA5121a4496cf366bf0c26ffacf5e4277a15b36cc53bbb8825175e07c5057f9fefa6ed059950c4f5ab93fd03fb40aae8d982d002e687a5c3e4f5fa839a735308b8b16
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Filesize
24KB
MD5ee87d669bdaf3fe239b86f4f76bab467
SHA1a3d79efbb199aebb263db11a054ee1e5692be607
SHA256f305a627115059bb9d66df01e558c00c6e2e5fff6e93c33299f069699dd893ac
SHA512bcff0489ff29f14c69e63a490372069c3dfc740a1df7f9b2566f3d7a74e1f8be1a3722a51c481076362c9ca18aa094905a178d08a525269e769438853d407175
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Filesize
24KB
MD5ee87d669bdaf3fe239b86f4f76bab467
SHA1a3d79efbb199aebb263db11a054ee1e5692be607
SHA256f305a627115059bb9d66df01e558c00c6e2e5fff6e93c33299f069699dd893ac
SHA512bcff0489ff29f14c69e63a490372069c3dfc740a1df7f9b2566f3d7a74e1f8be1a3722a51c481076362c9ca18aa094905a178d08a525269e769438853d407175
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Filesize
24KB
MD5ee87d669bdaf3fe239b86f4f76bab467
SHA1a3d79efbb199aebb263db11a054ee1e5692be607
SHA256f305a627115059bb9d66df01e558c00c6e2e5fff6e93c33299f069699dd893ac
SHA512bcff0489ff29f14c69e63a490372069c3dfc740a1df7f9b2566f3d7a74e1f8be1a3722a51c481076362c9ca18aa094905a178d08a525269e769438853d407175
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Filesize
24KB
MD5ee87d669bdaf3fe239b86f4f76bab467
SHA1a3d79efbb199aebb263db11a054ee1e5692be607
SHA256f305a627115059bb9d66df01e558c00c6e2e5fff6e93c33299f069699dd893ac
SHA512bcff0489ff29f14c69e63a490372069c3dfc740a1df7f9b2566f3d7a74e1f8be1a3722a51c481076362c9ca18aa094905a178d08a525269e769438853d407175