Analysis
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max time kernel
176s -
max time network
218s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
25-06-2022 09:41
Static task
static1
Behavioral task
behavioral1
Sample
39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe
Resource
win10v2004-20220414-en
General
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Target
39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe
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Size
258KB
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MD5
7a717003f647ffa187853202db3cbe44
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SHA1
10b25fb91c1e200aba57b13ca96996a3a62dc77f
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SHA256
39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9
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SHA512
0c97a36671dd383481f665d910038404aa83b9e37cfcd127a08a7a57865b04450f19dc3a987d04b4e01aeed54835d126325042655e0116dfe12f687dd40b0577
Malware Config
Extracted
tofsee
43.231.4.7
lazystax.ru
Signatures
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Processes:
svchost.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\fjuwrsdb = "0" svchost.exe -
Creates new service(s) 1 TTPs
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Executes dropped EXE 1 IoCs
Processes:
ikfwnhoh.exepid process 676 ikfwnhoh.exe -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Sets service image path in registry 2 TTPs 1 IoCs
Processes:
svchost.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\fjuwrsdb\ImagePath = "C:\\Windows\\SysWOW64\\fjuwrsdb\\ikfwnhoh.exe" svchost.exe -
Deletes itself 1 IoCs
Processes:
svchost.exepid process 1724 svchost.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
ikfwnhoh.exedescription pid process target process PID 676 set thread context of 1724 676 ikfwnhoh.exe svchost.exe -
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.
Processes:
sc.exesc.exesc.exepid process 1764 sc.exe 1580 sc.exe 2028 sc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of WriteProcessMemory 30 IoCs
Processes:
39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exeikfwnhoh.exedescription pid process target process PID 1384 wrote to memory of 1632 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe cmd.exe PID 1384 wrote to memory of 1632 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe cmd.exe PID 1384 wrote to memory of 1632 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe cmd.exe PID 1384 wrote to memory of 1632 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe cmd.exe PID 1384 wrote to memory of 1400 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe cmd.exe PID 1384 wrote to memory of 1400 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe cmd.exe PID 1384 wrote to memory of 1400 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe cmd.exe PID 1384 wrote to memory of 1400 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe cmd.exe PID 1384 wrote to memory of 1764 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 1764 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 1764 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 1764 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 1580 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 1580 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 1580 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 1580 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 2028 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 2028 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 2028 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 2028 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe sc.exe PID 1384 wrote to memory of 1744 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe netsh.exe PID 1384 wrote to memory of 1744 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe netsh.exe PID 1384 wrote to memory of 1744 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe netsh.exe PID 1384 wrote to memory of 1744 1384 39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe netsh.exe PID 676 wrote to memory of 1724 676 ikfwnhoh.exe svchost.exe PID 676 wrote to memory of 1724 676 ikfwnhoh.exe svchost.exe PID 676 wrote to memory of 1724 676 ikfwnhoh.exe svchost.exe PID 676 wrote to memory of 1724 676 ikfwnhoh.exe svchost.exe PID 676 wrote to memory of 1724 676 ikfwnhoh.exe svchost.exe PID 676 wrote to memory of 1724 676 ikfwnhoh.exe svchost.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe"C:\Users\Admin\AppData\Local\Temp\39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fjuwrsdb\2⤵
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ikfwnhoh.exe" C:\Windows\SysWOW64\fjuwrsdb\2⤵
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" create fjuwrsdb binPath= "C:\Windows\SysWOW64\fjuwrsdb\ikfwnhoh.exe /d\"C:\Users\Admin\AppData\Local\Temp\39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe\"" type= own start= auto DisplayName= "wifi support"2⤵
- Launches sc.exe
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" description fjuwrsdb "wifi internet conection"2⤵
- Launches sc.exe
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" start fjuwrsdb2⤵
- Launches sc.exe
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C:\Windows\SysWOW64\netsh.exe"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul2⤵
- Modifies Windows Firewall
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C:\Windows\SysWOW64\fjuwrsdb\ikfwnhoh.exeC:\Windows\SysWOW64\fjuwrsdb\ikfwnhoh.exe /d"C:\Users\Admin\AppData\Local\Temp\39925d256ffb487c669d5c3bb768eba1f9cfa7595c7faf0947c9bcd52c2cf1c9.exe"1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\svchost.exesvchost.exe2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\ikfwnhoh.exeFilesize
14.5MB
MD55fbf73dd0d7698213ab594dfcecdbcce
SHA14621240d4b4d7ada237cc6caa135d596f518ae0b
SHA2561c37fa35a0f241666590e7b94f24c638f929b2393f9a41cedd5ed78bb588e93a
SHA512ce94c2aeb9af1279d5b97b855235b66e8e4ffe3a39408a7792eab0b14f56f7aa859750ef20bbeac2bfebb43c7c282174eb663b5c9032f38c9044d664fbfc602c
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C:\Windows\SysWOW64\fjuwrsdb\ikfwnhoh.exeFilesize
14.5MB
MD55fbf73dd0d7698213ab594dfcecdbcce
SHA14621240d4b4d7ada237cc6caa135d596f518ae0b
SHA2561c37fa35a0f241666590e7b94f24c638f929b2393f9a41cedd5ed78bb588e93a
SHA512ce94c2aeb9af1279d5b97b855235b66e8e4ffe3a39408a7792eab0b14f56f7aa859750ef20bbeac2bfebb43c7c282174eb663b5c9032f38c9044d664fbfc602c
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memory/676-74-0x0000000000E06000-0x0000000000E17000-memory.dmpFilesize
68KB
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memory/676-77-0x0000000000400000-0x0000000000C47000-memory.dmpFilesize
8.3MB
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memory/676-68-0x0000000000E06000-0x0000000000E17000-memory.dmpFilesize
68KB
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memory/1384-57-0x0000000000D56000-0x0000000000D67000-memory.dmpFilesize
68KB
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memory/1384-58-0x0000000000400000-0x0000000000C47000-memory.dmpFilesize
8.3MB
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memory/1384-54-0x0000000000D56000-0x0000000000D67000-memory.dmpFilesize
68KB
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memory/1384-65-0x0000000000400000-0x0000000000C47000-memory.dmpFilesize
8.3MB
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memory/1384-55-0x0000000076011000-0x0000000076013000-memory.dmpFilesize
8KB
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memory/1400-59-0x0000000000000000-mapping.dmp
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memory/1580-62-0x0000000000000000-mapping.dmp
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memory/1632-56-0x0000000000000000-mapping.dmp
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memory/1724-70-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/1724-72-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/1724-73-0x0000000000089A6B-mapping.dmp
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memory/1724-79-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/1724-80-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/1744-64-0x0000000000000000-mapping.dmp
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memory/1764-61-0x0000000000000000-mapping.dmp
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memory/2028-63-0x0000000000000000-mapping.dmp