Analysis
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max time kernel
134s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
11/10/2022, 02:15
Static task
static1
Behavioral task
behavioral1
Sample
39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe
Resource
win7-20220812-en
windows7-x64
12 signatures
150 seconds
Behavioral task
behavioral2
Sample
39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
12 signatures
150 seconds
General
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Target
39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe
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Size
160KB
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MD5
012f7479d7b48944ff46c0366a8f4275
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SHA1
8e8e2adebb5e772b27617da69c94636357ca19b6
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SHA256
39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77
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SHA512
98e9c8890e245427e627eda1f9819f2c7fdaf24adcfce5b85017db69f0a3a431cef8f9c7c7a3571623fbe4e75a85ff5eb40198bf7325bcd601ce3aa1f56bfb8b
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SSDEEP
768:HextDp1n1UoA2CcxNnSRJzEl8w7KKKzeN4YZI7AlSl/1aDqx2lpR5htkc9I/eK+B:+U2Ulm7i649//eK+AV2Zw7RSTpP
Score
8/10
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 4136 windowsmp.exe -
Sets service image path in registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\4LLI\ImagePath = "C:\\Windows\\yoos.b" windowsmp.exe -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\windowsmp = "C:\\Windows\\windowsmp.exe" 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run windowsmp.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\windowsmp = "C:\\Windows\\windowsmp.exe" windowsmp.exe -
Drops autorun.inf file 1 TTPs 48 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
description ioc Process File opened for modification \??\j:\autorun.inf windowsmp.exe File created \??\k:\autorun.inf windowsmp.exe File opened for modification \??\o:\autorun.inf windowsmp.exe File created \??\u:\autorun.inf windowsmp.exe File opened for modification \??\v:\autorun.inf windowsmp.exe File opened for modification \??\d:\autorun.inf windowsmp.exe File opened for modification \??\e:\autorun.inf windowsmp.exe File created \??\i:\autorun.inf windowsmp.exe File created \??\j:\autorun.inf windowsmp.exe File created \??\n:\autorun.inf windowsmp.exe File created \??\r:\autorun.inf windowsmp.exe File created \??\v:\autorun.inf windowsmp.exe File created \??\w:\autorun.inf windowsmp.exe File opened for modification \??\c:\autorun.inf windowsmp.exe File created \??\d:\autorun.inf windowsmp.exe File created \??\g:\autorun.inf windowsmp.exe File opened for modification \??\u:\autorun.inf windowsmp.exe File created \??\f:\autorun.inf windowsmp.exe File opened for modification \??\k:\autorun.inf windowsmp.exe File created \??\s:\autorun.inf windowsmp.exe File opened for modification \??\p:\autorun.inf windowsmp.exe File opened for modification \??\q:\autorun.inf windowsmp.exe File opened for modification \??\l:\autorun.inf windowsmp.exe File opened for modification \??\n:\autorun.inf windowsmp.exe File created \??\t:\autorun.inf windowsmp.exe File opened for modification \??\g:\autorun.inf windowsmp.exe File created \??\h:\autorun.inf windowsmp.exe File opened for modification \??\i:\autorun.inf windowsmp.exe File created \??\o:\autorun.inf windowsmp.exe File opened for modification \??\r:\autorun.inf windowsmp.exe File created \??\c:\autorun.inf windowsmp.exe File created \??\e:\autorun.inf windowsmp.exe File created \??\l:\autorun.inf windowsmp.exe File created \??\q:\autorun.inf windowsmp.exe File opened for modification \??\s:\autorun.inf windowsmp.exe File opened for modification \??\w:\autorun.inf windowsmp.exe File opened for modification \??\x:\autorun.inf windowsmp.exe File created \??\x:\autorun.inf windowsmp.exe File opened for modification \??\f:\autorun.inf windowsmp.exe File opened for modification \??\m:\autorun.inf windowsmp.exe File created \??\p:\autorun.inf windowsmp.exe File created \??\z:\autorun.inf windowsmp.exe File opened for modification \??\y:\autorun.inf windowsmp.exe File created \??\y:\autorun.inf windowsmp.exe File opened for modification \??\z:\autorun.inf windowsmp.exe File opened for modification \??\h:\autorun.inf windowsmp.exe File created \??\m:\autorun.inf windowsmp.exe File opened for modification \??\t:\autorun.inf windowsmp.exe -
Drops file in System32 directory 2 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\init.exe windowsmp.exe File created C:\Windows\SysWOW64\init.exe windowsmp.exe -
Drops file in Windows directory 4 IoCs
description ioc Process File opened for modification C:\Windows\windowsmp.exe 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe File created C:\Windows\windowsmp.exe 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe File opened for modification C:\Windows\yoos.b windowsmp.exe File created C:\Windows\yoos.b windowsmp.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\ShellBrowser\ITBar7Layout = 13000000000000000000000020000000100000000000000001000000010700005e01000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Internet Explorer\Toolbar explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Internet Explorer\Toolbar\Locked = "1" explorer.exe -
Modifies registry class 35 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = 00000000ffffffff explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0 = 50003100000000000c5542a7100041646d696e003c0009000400efbe0c551d9c4b555c242e0000007de10100000001000000000000000000000000000000b948cc00410064006d0069006e00000014000000 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0 = 56003100000000000c551d9c12004170704461746100400009000400efbe0c551d9c4b555c242e00000088e10100000001000000000000000000000000000000393ab1004100700070004400610074006100000016000000 explorer.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Generic" explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f50e04fd020ea3a6910a2d808002b30309d0000 explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\MRUListEx = 00000000ffffffff explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\MRUListEx = 00000000ffffffff explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\MRUListEx = 00000000ffffffff explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\MRUListEx = 00000000ffffffff explorer.exe Set value (int) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\NodeSlot = "1" explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 19002f433a5c000000000000000000000000000000000000000000 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0 = 78003100000000000c551d9c1100557365727300640009000400efbe874f77484b555c242e000000c70500000000010000000000000000003a0000000000b6fcd40055007300650072007300000040007300680065006c006c00330032002e0064006c006c002c002d0032003100380031003300000014000000 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0\MRUListEx = ffffffff explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\ explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0\0 = 4e003100000000004b555c24100054656d7000003a0009000400efbe0c551d9c4b555c242e0000009ce1010000000100000000000000000000000000000009f37500540065006d007000000014000000 explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1 explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff explorer.exe Key created \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0 explorer.exe Set value (data) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\0\0\0\0 = 50003100000000000c55249f10004c6f63616c003c0009000400efbe0c551d9c4b555c242e0000009be10100000001000000000000000000000000000000c7c1b9004c006f00630061006c00000014000000 explorer.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\ explorer.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2116 explorer.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2116 explorer.exe -
Suspicious use of SetWindowsHookEx 4 IoCs
pid Process 5036 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe 4136 windowsmp.exe 2116 explorer.exe 2116 explorer.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 5036 wrote to memory of 960 5036 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe 82 PID 5036 wrote to memory of 960 5036 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe 82 PID 5036 wrote to memory of 4136 5036 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe 84 PID 5036 wrote to memory of 4136 5036 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe 84 PID 5036 wrote to memory of 4136 5036 39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe"C:\Users\Admin\AppData\Local\Temp\39f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5036 -
C:\Windows\explorer.exeC:\Windows\explorer.exe C:\Users\Admin\AppData\Local\Temp2⤵PID:960
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C:\Windows\windowsmp.exeC:\Windows\windowsmp.exe2⤵
- Executes dropped EXE
- Sets service image path in registry
- Adds Run key to start application
- Drops autorun.inf file
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
PID:4136
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C:\Windows\explorer.exeC:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding1⤵
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2116
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:4540
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
160KB
MD5012f7479d7b48944ff46c0366a8f4275
SHA18e8e2adebb5e772b27617da69c94636357ca19b6
SHA25639f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77
SHA51298e9c8890e245427e627eda1f9819f2c7fdaf24adcfce5b85017db69f0a3a431cef8f9c7c7a3571623fbe4e75a85ff5eb40198bf7325bcd601ce3aa1f56bfb8b
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Filesize
160KB
MD5012f7479d7b48944ff46c0366a8f4275
SHA18e8e2adebb5e772b27617da69c94636357ca19b6
SHA25639f32bce53652ac3fa5123983d7072091f92ba08741078216d4ec3b95ba1fa77
SHA51298e9c8890e245427e627eda1f9819f2c7fdaf24adcfce5b85017db69f0a3a431cef8f9c7c7a3571623fbe4e75a85ff5eb40198bf7325bcd601ce3aa1f56bfb8b