Analysis
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max time kernel
159s -
max time network
125s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
01-02-2022 15:30
Static task
static1
Behavioral task
behavioral1
Sample
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe
Resource
win10v2004-en-20220113
General
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Target
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe
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Size
657KB
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MD5
3e2453e67ae1eead725a627adba9ae2e
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SHA1
7a6ffc2da7d2ccd87e80c5c5c829bf0a5f1fda51
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SHA256
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44
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SHA512
1fc6356638a3964c1715a83d35b08c46ca503af3ce2b3df108e4f41361d12c22c490af96e7c7086c32a898bedccb89b695f9129313cfebe08d061e80ae3badf7
Malware Config
Extracted
C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\INSTRUCTIONS.html
href="mailto:[email protected]">[email protected]</a><br>
href="mailto:[email protected]">[email protected]</a>
http-equiv="X-UA-Compatible"
Signatures
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MedusaLocker
Ransomware with several variants first seen in September 2019.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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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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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exedescription ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe" bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe -
Drops desktop.ini file(s) 1 IoCs
Processes:
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exedescription ioc Process File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-3846991908-3261386348-1409841751-1000\desktop.ini bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe -
Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exedescription ioc Process File opened (read-only) \??\O: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\V: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\W: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\X: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\A: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\E: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\F: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\M: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\S: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\T: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\B: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\G: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\I: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\L: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\Q: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\U: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\Z: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\H: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\K: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\N: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\P: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\J: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\R: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe File opened (read-only) \??\Y: bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Interacts with shadow copies 2 TTPs 3 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exevssadmin.exevssadmin.exepid Process 624 vssadmin.exe 1444 vssadmin.exe 268 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 29 IoCs
Processes:
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exepid Process 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe -
Suspicious use of AdjustPrivilegeToken 63 IoCs
Processes:
vssvc.exewmic.exewmic.exewmic.exedescription pid Process Token: SeBackupPrivilege 1864 vssvc.exe Token: SeRestorePrivilege 1864 vssvc.exe Token: SeAuditPrivilege 1864 vssvc.exe Token: SeIncreaseQuotaPrivilege 304 wmic.exe Token: SeSecurityPrivilege 304 wmic.exe Token: SeTakeOwnershipPrivilege 304 wmic.exe Token: SeLoadDriverPrivilege 304 wmic.exe Token: SeSystemProfilePrivilege 304 wmic.exe Token: SeSystemtimePrivilege 304 wmic.exe Token: SeProfSingleProcessPrivilege 304 wmic.exe Token: SeIncBasePriorityPrivilege 304 wmic.exe Token: SeCreatePagefilePrivilege 304 wmic.exe Token: SeBackupPrivilege 304 wmic.exe Token: SeRestorePrivilege 304 wmic.exe Token: SeShutdownPrivilege 304 wmic.exe Token: SeDebugPrivilege 304 wmic.exe Token: SeSystemEnvironmentPrivilege 304 wmic.exe Token: SeRemoteShutdownPrivilege 304 wmic.exe Token: SeUndockPrivilege 304 wmic.exe Token: SeManageVolumePrivilege 304 wmic.exe Token: 33 304 wmic.exe Token: 34 304 wmic.exe Token: 35 304 wmic.exe Token: SeIncreaseQuotaPrivilege 1632 wmic.exe Token: SeSecurityPrivilege 1632 wmic.exe Token: SeTakeOwnershipPrivilege 1632 wmic.exe Token: SeLoadDriverPrivilege 1632 wmic.exe Token: SeSystemProfilePrivilege 1632 wmic.exe Token: SeSystemtimePrivilege 1632 wmic.exe Token: SeProfSingleProcessPrivilege 1632 wmic.exe Token: SeIncBasePriorityPrivilege 1632 wmic.exe Token: SeCreatePagefilePrivilege 1632 wmic.exe Token: SeBackupPrivilege 1632 wmic.exe Token: SeRestorePrivilege 1632 wmic.exe Token: SeShutdownPrivilege 1632 wmic.exe Token: SeDebugPrivilege 1632 wmic.exe Token: SeSystemEnvironmentPrivilege 1632 wmic.exe Token: SeRemoteShutdownPrivilege 1632 wmic.exe Token: SeUndockPrivilege 1632 wmic.exe Token: SeManageVolumePrivilege 1632 wmic.exe Token: 33 1632 wmic.exe Token: 34 1632 wmic.exe Token: 35 1632 wmic.exe Token: SeIncreaseQuotaPrivilege 1348 wmic.exe Token: SeSecurityPrivilege 1348 wmic.exe Token: SeTakeOwnershipPrivilege 1348 wmic.exe Token: SeLoadDriverPrivilege 1348 wmic.exe Token: SeSystemProfilePrivilege 1348 wmic.exe Token: SeSystemtimePrivilege 1348 wmic.exe Token: SeProfSingleProcessPrivilege 1348 wmic.exe Token: SeIncBasePriorityPrivilege 1348 wmic.exe Token: SeCreatePagefilePrivilege 1348 wmic.exe Token: SeBackupPrivilege 1348 wmic.exe Token: SeRestorePrivilege 1348 wmic.exe Token: SeShutdownPrivilege 1348 wmic.exe Token: SeDebugPrivilege 1348 wmic.exe Token: SeSystemEnvironmentPrivilege 1348 wmic.exe Token: SeRemoteShutdownPrivilege 1348 wmic.exe Token: SeUndockPrivilege 1348 wmic.exe Token: SeManageVolumePrivilege 1348 wmic.exe Token: 33 1348 wmic.exe Token: 34 1348 wmic.exe Token: 35 1348 wmic.exe -
Suspicious use of WriteProcessMemory 24 IoCs
Processes:
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exedescription pid Process procid_target PID 1516 wrote to memory of 268 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 27 PID 1516 wrote to memory of 268 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 27 PID 1516 wrote to memory of 268 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 27 PID 1516 wrote to memory of 268 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 27 PID 1516 wrote to memory of 304 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 30 PID 1516 wrote to memory of 304 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 30 PID 1516 wrote to memory of 304 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 30 PID 1516 wrote to memory of 304 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 30 PID 1516 wrote to memory of 624 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 32 PID 1516 wrote to memory of 624 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 32 PID 1516 wrote to memory of 624 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 32 PID 1516 wrote to memory of 624 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 32 PID 1516 wrote to memory of 1632 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 34 PID 1516 wrote to memory of 1632 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 34 PID 1516 wrote to memory of 1632 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 34 PID 1516 wrote to memory of 1632 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 34 PID 1516 wrote to memory of 1444 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 36 PID 1516 wrote to memory of 1444 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 36 PID 1516 wrote to memory of 1444 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 36 PID 1516 wrote to memory of 1444 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 36 PID 1516 wrote to memory of 1348 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 38 PID 1516 wrote to memory of 1348 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 38 PID 1516 wrote to memory of 1348 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 38 PID 1516 wrote to memory of 1348 1516 bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe 38 -
System policy modification 1 TTPs 1 IoCs
Processes:
bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exedescription ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe"C:\Users\Admin\AppData\Local\Temp\bb4d0f67360858a27da21d79bf93b5c628045883712c3c2e10917bebf6771c44.exe"1⤵
- Adds Run key to start application
- Drops desktop.ini file(s)
- Enumerates connected drives
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1516 -
C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:268
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:304
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:624
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1632
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C:\Windows\SysWOW64\vssadmin.exevssadmin.exe Delete Shadows /All /Quiet2⤵
- Interacts with shadow copies
PID:1444
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C:\Windows\SysWOW64\Wbem\wmic.exewmic.exe SHADOWCOPY /nointeractive2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1348
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1864