Analysis
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max time kernel
201s -
max time network
196s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
23-11-2022 13:24
Static task
static1
Behavioral task
behavioral1
Sample
ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe
Resource
win10v2004-20221111-en
General
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Target
ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe
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Size
424KB
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MD5
aa764c52771914cdfb3f246162ff407c
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SHA1
a05a64765f4809ab09d6c38eaa6cfe12e6a10905
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SHA256
ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71
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SHA512
c3b522ca6530220435fa027d17e905dbf7ad9991e9e65d07ddad0e8cb51f55e479f35d11f2e289beda3d2c24bc7aef8c583a2b13df93598e495a1e734e6e5146
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SSDEEP
6144:RtvAvgwGaWEWS7WjpCwhj8cuEMDTr8x3EsznmkVq78+OYxsy2v6qF8rbJVktqB5u:7AvgmWS7WjGcsX8Okdq78r9VFw7JT1J
Malware Config
Signatures
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NirSoft MailPassView 11 IoCs
Password recovery tool for various email clients
Processes:
resource yara_rule behavioral1/memory/840-66-0x0000000000400000-0x0000000000484000-memory.dmp MailPassView behavioral1/memory/840-68-0x0000000000400000-0x0000000000484000-memory.dmp MailPassView behavioral1/memory/840-72-0x000000000047EA4E-mapping.dmp MailPassView behavioral1/memory/840-70-0x0000000000400000-0x0000000000484000-memory.dmp MailPassView behavioral1/memory/840-74-0x0000000000400000-0x0000000000484000-memory.dmp MailPassView behavioral1/memory/840-76-0x0000000000400000-0x0000000000484000-memory.dmp MailPassView behavioral1/memory/896-89-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral1/memory/896-90-0x0000000000411654-mapping.dmp MailPassView behavioral1/memory/896-93-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral1/memory/896-95-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral1/memory/896-96-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 10 IoCs
Password recovery tool for various web browsers
Processes:
resource yara_rule behavioral1/memory/840-66-0x0000000000400000-0x0000000000484000-memory.dmp WebBrowserPassView behavioral1/memory/840-68-0x0000000000400000-0x0000000000484000-memory.dmp WebBrowserPassView behavioral1/memory/840-72-0x000000000047EA4E-mapping.dmp WebBrowserPassView behavioral1/memory/840-70-0x0000000000400000-0x0000000000484000-memory.dmp WebBrowserPassView behavioral1/memory/840-74-0x0000000000400000-0x0000000000484000-memory.dmp WebBrowserPassView behavioral1/memory/840-76-0x0000000000400000-0x0000000000484000-memory.dmp WebBrowserPassView behavioral1/memory/1696-98-0x0000000000442628-mapping.dmp WebBrowserPassView behavioral1/memory/1696-97-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral1/memory/1696-101-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral1/memory/1696-103-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView -
Nirsoft 15 IoCs
Processes:
resource yara_rule behavioral1/memory/840-66-0x0000000000400000-0x0000000000484000-memory.dmp Nirsoft behavioral1/memory/840-68-0x0000000000400000-0x0000000000484000-memory.dmp Nirsoft behavioral1/memory/840-72-0x000000000047EA4E-mapping.dmp Nirsoft behavioral1/memory/840-70-0x0000000000400000-0x0000000000484000-memory.dmp Nirsoft behavioral1/memory/840-74-0x0000000000400000-0x0000000000484000-memory.dmp Nirsoft behavioral1/memory/840-76-0x0000000000400000-0x0000000000484000-memory.dmp Nirsoft behavioral1/memory/896-89-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral1/memory/896-90-0x0000000000411654-mapping.dmp Nirsoft behavioral1/memory/896-93-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral1/memory/896-95-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral1/memory/896-96-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral1/memory/1696-98-0x0000000000442628-mapping.dmp Nirsoft behavioral1/memory/1696-97-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral1/memory/1696-101-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral1/memory/1696-103-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft -
Executes dropped EXE 1 IoCs
Processes:
csrss.exepid process 1880 csrss.exe -
Loads dropped DLL 1 IoCs
Processes:
winlogon.exepid process 1468 winlogon.exe -
Uses the VBS compiler for execution 1 TTPs
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Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
Processes:
vbc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts vbc.exe -
Adds Run key to start application 2 TTPs 4 IoCs
Processes:
winlogon.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\SubFolder\\SubFolder\\winlogon.exe" winlogon.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\SubFolder\\SubFolder\\winlogon.exe" winlogon.exe Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\SubFolder\\SubFolder\\winlogon.exe" csrss.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\SubFolder\\SubFolder\\winlogon.exe" csrss.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 6 whatismyipaddress.com 8 whatismyipaddress.com 9 whatismyipaddress.com -
Suspicious use of SetThreadContext 3 IoCs
Processes:
winlogon.exewinlogon.exedescription pid process target process PID 1468 set thread context of 840 1468 winlogon.exe winlogon.exe PID 840 set thread context of 896 840 winlogon.exe vbc.exe PID 840 set thread context of 1696 840 winlogon.exe vbc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exewinlogon.execsrss.exepid process 472 ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe 472 ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe 1468 winlogon.exe 1468 winlogon.exe 1468 winlogon.exe 1468 winlogon.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe 1880 csrss.exe -
Suspicious behavior: RenamesItself 1 IoCs
Processes:
ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exepid process 472 ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exewinlogon.execsrss.exedescription pid process Token: SeDebugPrivilege 472 ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe Token: SeDebugPrivilege 1468 winlogon.exe Token: SeDebugPrivilege 1468 winlogon.exe Token: SeDebugPrivilege 1880 csrss.exe Token: SeDebugPrivilege 1880 csrss.exe -
Suspicious use of WriteProcessMemory 37 IoCs
Processes:
ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exewinlogon.exewinlogon.exedescription pid process target process PID 472 wrote to memory of 1468 472 ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe winlogon.exe PID 472 wrote to memory of 1468 472 ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe winlogon.exe PID 472 wrote to memory of 1468 472 ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe winlogon.exe PID 472 wrote to memory of 1468 472 ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 840 1468 winlogon.exe winlogon.exe PID 1468 wrote to memory of 1880 1468 winlogon.exe csrss.exe PID 1468 wrote to memory of 1880 1468 winlogon.exe csrss.exe PID 1468 wrote to memory of 1880 1468 winlogon.exe csrss.exe PID 1468 wrote to memory of 1880 1468 winlogon.exe csrss.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 896 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe PID 840 wrote to memory of 1696 840 winlogon.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe"C:\Users\Admin\AppData\Local\Temp\ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:472 -
C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe"C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe"2⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1468 -
C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe"C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe"3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:840 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"4⤵
- Accesses Microsoft Outlook accounts
PID:896 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holderwb.txt"4⤵PID:1696
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C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe"C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\csrss.exe" -keyhide -prochide 840 -reg C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe -proc 840 C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1880
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
2B
MD5f3b25701fe362ec84616a93a45ce9998
SHA1d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA256b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
SHA51298c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84
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Filesize
424KB
MD5aa764c52771914cdfb3f246162ff407c
SHA1a05a64765f4809ab09d6c38eaa6cfe12e6a10905
SHA256ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71
SHA512c3b522ca6530220435fa027d17e905dbf7ad9991e9e65d07ddad0e8cb51f55e479f35d11f2e289beda3d2c24bc7aef8c583a2b13df93598e495a1e734e6e5146
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Filesize
424KB
MD5aa764c52771914cdfb3f246162ff407c
SHA1a05a64765f4809ab09d6c38eaa6cfe12e6a10905
SHA256ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71
SHA512c3b522ca6530220435fa027d17e905dbf7ad9991e9e65d07ddad0e8cb51f55e479f35d11f2e289beda3d2c24bc7aef8c583a2b13df93598e495a1e734e6e5146
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Filesize
424KB
MD5aa764c52771914cdfb3f246162ff407c
SHA1a05a64765f4809ab09d6c38eaa6cfe12e6a10905
SHA256ac58566b0816ed10555d42d221bf5c12a70754e33b76adaf38253786ce57fa71
SHA512c3b522ca6530220435fa027d17e905dbf7ad9991e9e65d07ddad0e8cb51f55e479f35d11f2e289beda3d2c24bc7aef8c583a2b13df93598e495a1e734e6e5146