Analysis
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max time kernel
152s -
max time network
157s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
30-09-2021 12:17
Behavioral task
behavioral1
Sample
f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe
Resource
win7-en-20210920
General
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Target
f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe
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Size
346KB
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MD5
776211eed31b6a8ea3539ac1d822362c
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SHA1
b18225f3217536c802d43d9e4a0ac8ac22a90109
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SHA256
f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4
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SHA512
c067fd43414e3ccb87cef9b707125634be0ba5f0f6aa6e13a63de791ff2cb4a1b0ebb63fd174a5940f4e6aab0c1e349977da6e2eda633bd64ec1502a38f3d3f4
Malware Config
Extracted
njrat
0.6.4
HacKed
windownssystem.ddns.net:1010
301b5fcf8ce2fab8868e80b6c1f912fe
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reg_key
301b5fcf8ce2fab8868e80b6c1f912fe
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splitter
|'|'|
Signatures
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Detect XtremeRAT Payload 4 IoCs
Processes:
resource yara_rule behavioral2/memory/580-114-0x0000000000000000-mapping.dmp family_xtremerat behavioral2/memory/644-115-0x0000000000000000-mapping.dmp family_xtremerat behavioral2/memory/580-118-0x0000000010000000-0x0000000010059000-memory.dmp family_xtremerat behavioral2/memory/644-119-0x0000000010000000-0x0000000010059000-memory.dmp family_xtremerat -
XtremeRAT
The XtremeRAT was developed by xtremecoder and has been available since at least 2010, and written in Delphi.
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Executes dropped EXE 2 IoCs
Processes:
562Server.exeSystem.exepid process 2104 562Server.exe 1924 System.exe -
Modifies Installed Components in the registry 2 TTPs
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Modifies Windows Firewall 1 TTPs
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Processes:
resource yara_rule behavioral2/memory/580-118-0x0000000010000000-0x0000000010059000-memory.dmp upx behavioral2/memory/644-119-0x0000000010000000-0x0000000010059000-memory.dmp upx -
Drops startup file 2 IoCs
Processes:
System.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\301b5fcf8ce2fab8868e80b6c1f912fe.exe System.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\301b5fcf8ce2fab8868e80b6c1f912fe.exe System.exe -
Adds Run key to start application 2 TTPs 6 IoCs
Processes:
System.exeLaunchWinApp.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\301b5fcf8ce2fab8868e80b6c1f912fe = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\System.exe\" .." System.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\301b5fcf8ce2fab8868e80b6c1f912fe = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\System.exe\" .." System.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run LaunchWinApp.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\HKLM = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MuAwaYOriginal\\MuAwaY.exe" LaunchWinApp.exe Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run LaunchWinApp.exe Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\HKCU = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MuAwaYOriginal\\MuAwaY.exe" LaunchWinApp.exe -
Drops file in System32 directory 2 IoCs
Processes:
f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exedescription ioc process File created C:\Windows\SysWOW64\562Server.exe.exe f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe File created C:\Windows\SysWOW64\562Server.exe f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 4 IoCs
Processes:
WerFault.exeWerFault.exeWerFault.exeWerFault.exepid pid_target process target process 3920 580 WerFault.exe svchost.exe 1840 580 WerFault.exe svchost.exe 1788 644 WerFault.exe LaunchWinApp.exe 3228 644 WerFault.exe LaunchWinApp.exe -
Suspicious behavior: EnumeratesProcesses 45 IoCs
Processes:
System.exepid process 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe 1924 System.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
System.exedescription pid process Token: SeDebugPrivilege 1924 System.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
LaunchWinApp.exepid process 644 LaunchWinApp.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe562Server.exeSystem.exedescription pid process target process PID 3128 wrote to memory of 580 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe svchost.exe PID 3128 wrote to memory of 580 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe svchost.exe PID 3128 wrote to memory of 580 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe svchost.exe PID 3128 wrote to memory of 580 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe svchost.exe PID 3128 wrote to memory of 644 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe LaunchWinApp.exe PID 3128 wrote to memory of 644 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe LaunchWinApp.exe PID 3128 wrote to memory of 644 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe LaunchWinApp.exe PID 3128 wrote to memory of 644 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe LaunchWinApp.exe PID 3128 wrote to memory of 2104 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe 562Server.exe PID 3128 wrote to memory of 2104 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe 562Server.exe PID 3128 wrote to memory of 2104 3128 f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe 562Server.exe PID 2104 wrote to memory of 1924 2104 562Server.exe System.exe PID 2104 wrote to memory of 1924 2104 562Server.exe System.exe PID 2104 wrote to memory of 1924 2104 562Server.exe System.exe PID 1924 wrote to memory of 404 1924 System.exe netsh.exe PID 1924 wrote to memory of 404 1924 System.exe netsh.exe PID 1924 wrote to memory of 404 1924 System.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe"C:\Users\Admin\AppData\Local\Temp\f32fb1af5db650065e6e1d02ade5506e6c0903e4bbc9ff6ff2fbf94bef6ffba4.exe"1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\svchost.exesvchost.exe2⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 580 -s 5323⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 580 -s 5243⤵
- Program crash
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C:\Windows\SysWOW64\LaunchWinApp.exeC:\Windows\system32\LaunchWinApp.exe2⤵
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 8643⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 644 -s 8443⤵
- Program crash
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C:\Windows\SysWOW64\562Server.exe"C:\Windows\system32\562Server.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\System.exe"C:\Users\Admin\AppData\Local\Temp\System.exe"3⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\System.exe" "System.exe" ENABLE4⤵
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\System.exeMD5
b207157c9f171556bf4d240c14aaba0e
SHA1958f8d31b526ee0db15f40cee2963a6e0f84d627
SHA2560b642220d2d6a965c347c2dc4b5fde794194c072a8621455ec3dcf68cba7f610
SHA5125fe7d96ef9d8619ad180e76de3400d201614bf733f40095610bc0f24ea9c4747a4b05f398a046823a7e20a9410c11ff3cc177313999d53d236b98d5874805296
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C:\Users\Admin\AppData\Local\Temp\System.exeMD5
b207157c9f171556bf4d240c14aaba0e
SHA1958f8d31b526ee0db15f40cee2963a6e0f84d627
SHA2560b642220d2d6a965c347c2dc4b5fde794194c072a8621455ec3dcf68cba7f610
SHA5125fe7d96ef9d8619ad180e76de3400d201614bf733f40095610bc0f24ea9c4747a4b05f398a046823a7e20a9410c11ff3cc177313999d53d236b98d5874805296
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C:\Windows\SysWOW64\562Server.exeMD5
b207157c9f171556bf4d240c14aaba0e
SHA1958f8d31b526ee0db15f40cee2963a6e0f84d627
SHA2560b642220d2d6a965c347c2dc4b5fde794194c072a8621455ec3dcf68cba7f610
SHA5125fe7d96ef9d8619ad180e76de3400d201614bf733f40095610bc0f24ea9c4747a4b05f398a046823a7e20a9410c11ff3cc177313999d53d236b98d5874805296
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C:\Windows\SysWOW64\562Server.exeMD5
b207157c9f171556bf4d240c14aaba0e
SHA1958f8d31b526ee0db15f40cee2963a6e0f84d627
SHA2560b642220d2d6a965c347c2dc4b5fde794194c072a8621455ec3dcf68cba7f610
SHA5125fe7d96ef9d8619ad180e76de3400d201614bf733f40095610bc0f24ea9c4747a4b05f398a046823a7e20a9410c11ff3cc177313999d53d236b98d5874805296
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memory/404-125-0x0000000000000000-mapping.dmp
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memory/580-118-0x0000000010000000-0x0000000010059000-memory.dmpFilesize
356KB
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memory/580-114-0x0000000000000000-mapping.dmp
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memory/644-119-0x0000000010000000-0x0000000010059000-memory.dmpFilesize
356KB
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memory/644-115-0x0000000000000000-mapping.dmp
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memory/1924-122-0x0000000000000000-mapping.dmp
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memory/1924-126-0x0000000002D40000-0x0000000002D41000-memory.dmpFilesize
4KB
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memory/1924-127-0x0000000002D43000-0x0000000002D45000-memory.dmpFilesize
8KB
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memory/2104-121-0x0000000003310000-0x0000000003311000-memory.dmpFilesize
4KB
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memory/2104-116-0x0000000000000000-mapping.dmp