Analysis
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max time kernel
237s -
max time network
206s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
26-11-2022 08:35
Static task
static1
Behavioral task
behavioral1
Sample
8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe
Resource
win10v2004-20220812-en
General
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Target
8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe
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Size
69KB
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MD5
17887b088376c4c22440b1e3fa6e62cc
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SHA1
969be135099bdb5d34996a91137b51ab407cf50b
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SHA256
8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2
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SHA512
9ad33b12561374d433a23c19988b71ae61ba7f9dbc23c7c22f13f994b2d4e749dc4932628b84ce67d4e7b69ffd7c0b8925ecb0735043ef110c1a5a331e987273
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SSDEEP
1536:JkTQy7RI8vUnOil3EWQCsITAunkNWcLy94zOPXUZNa:JkTQy6VBDQC1TAukkkyezCUW
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
yahoo.exepid process 1812 yahoo.exe -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Drops startup file 2 IoCs
Processes:
yahoo.exedescription ioc process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cf0f912aa87fb87dd09d7a961213c3f7.exe yahoo.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cf0f912aa87fb87dd09d7a961213c3f7.exe yahoo.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
yahoo.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\cf0f912aa87fb87dd09d7a961213c3f7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\yahoo.exe\" .." yahoo.exe Set value (str) \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\cf0f912aa87fb87dd09d7a961213c3f7 = "\"C:\\Users\\Admin\\AppData\\Roaming\\yahoo.exe\" .." yahoo.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 1 IoCs
Processes:
yahoo.exepid process 1812 yahoo.exe -
Suspicious use of AdjustPrivilegeToken 6 IoCs
Processes:
8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exeyahoo.exedescription pid process Token: SeDebugPrivilege 1484 8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe Token: 33 1484 8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe Token: SeIncBasePriorityPrivilege 1484 8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe Token: SeDebugPrivilege 1812 yahoo.exe Token: 33 1812 yahoo.exe Token: SeIncBasePriorityPrivilege 1812 yahoo.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exeyahoo.exedescription pid process target process PID 1484 wrote to memory of 1812 1484 8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe yahoo.exe PID 1484 wrote to memory of 1812 1484 8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe yahoo.exe PID 1484 wrote to memory of 1812 1484 8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe yahoo.exe PID 1812 wrote to memory of 736 1812 yahoo.exe netsh.exe PID 1812 wrote to memory of 736 1812 yahoo.exe netsh.exe PID 1812 wrote to memory of 736 1812 yahoo.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe"C:\Users\Admin\AppData\Local\Temp\8bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1484 -
C:\Users\Admin\AppData\Roaming\yahoo.exe"C:\Users\Admin\AppData\Roaming\yahoo.exe"2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1812 -
C:\Windows\system32\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\yahoo.exe" "yahoo.exe" ENABLE3⤵
- Modifies Windows Firewall
PID:736
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\yahoo.exeFilesize
69KB
MD517887b088376c4c22440b1e3fa6e62cc
SHA1969be135099bdb5d34996a91137b51ab407cf50b
SHA2568bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2
SHA5129ad33b12561374d433a23c19988b71ae61ba7f9dbc23c7c22f13f994b2d4e749dc4932628b84ce67d4e7b69ffd7c0b8925ecb0735043ef110c1a5a331e987273
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C:\Users\Admin\AppData\Roaming\yahoo.exeFilesize
69KB
MD517887b088376c4c22440b1e3fa6e62cc
SHA1969be135099bdb5d34996a91137b51ab407cf50b
SHA2568bed0a1984bb6d5a976fbedc736fe2a71048fc633f54d5286f0d0c1cc963eef2
SHA5129ad33b12561374d433a23c19988b71ae61ba7f9dbc23c7c22f13f994b2d4e749dc4932628b84ce67d4e7b69ffd7c0b8925ecb0735043ef110c1a5a331e987273
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memory/736-64-0x0000000000000000-mapping.dmp
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memory/1484-54-0x000007FEF3D50000-0x000007FEF4773000-memory.dmpFilesize
10.1MB
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memory/1484-55-0x000007FEF4CD0000-0x000007FEF5190000-memory.dmpFilesize
4.8MB
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memory/1484-56-0x000007FEF2CB0000-0x000007FEF3D46000-memory.dmpFilesize
16.6MB
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memory/1484-57-0x000007FEFC251000-0x000007FEFC253000-memory.dmpFilesize
8KB
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memory/1812-58-0x0000000000000000-mapping.dmp
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memory/1812-61-0x000007FEF3D50000-0x000007FEF4773000-memory.dmpFilesize
10.1MB
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memory/1812-62-0x000007FEF4CD0000-0x000007FEF5190000-memory.dmpFilesize
4.8MB
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memory/1812-63-0x000007FEF2CB0000-0x000007FEF3D46000-memory.dmpFilesize
16.6MB