Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
11-06-2024 13:33
Static task
static1
Behavioral task
behavioral1
Sample
3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe
Resource
win10v2004-20240426-en
General
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Target
3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe
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Size
407KB
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MD5
c4a1fb9ad37a19f01a4736ff89bf0043
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SHA1
0e8cee769e085598da36bd734dff41ec30725122
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SHA256
3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e
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SHA512
b75229d18e4f5ac326fe7f687ca6f3dd1838056ae17126d84e5112b3df7e9ce2702903162e5447f0c0605cbd393bb5e29b865685617e7d1de801358f1900cef7
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SSDEEP
6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4C:gtRfJcNYFNm8UhlZGseC
Malware Config
Signatures
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Blocklisted process makes network request 8 IoCs
Processes:
rundll32.exeflow pid process 16 3056 rundll32.exe 23 3056 rundll32.exe 24 3056 rundll32.exe 25 3056 rundll32.exe 36 3056 rundll32.exe 40 3056 rundll32.exe 47 3056 rundll32.exe 54 3056 rundll32.exe -
Deletes itself 1 IoCs
Processes:
ldkny.exepid process 4604 ldkny.exe -
Executes dropped EXE 1 IoCs
Processes:
ldkny.exepid process 4604 ldkny.exe -
Loads dropped DLL 1 IoCs
Processes:
rundll32.exepid process 3056 rundll32.exe -
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:
rundll32.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\ktdld\\fqoyvvkjh.dll\",Verify" rundll32.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
rundll32.exedescription ioc process File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\v: rundll32.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
rundll32.exedescription ioc process File opened for modification \??\PHYSICALDRIVE0 rundll32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
rundll32.exepid process 3056 rundll32.exe -
Drops file in Program Files directory 2 IoCs
Processes:
ldkny.exedescription ioc process File opened for modification \??\c:\Program Files\ktdld ldkny.exe File created \??\c:\Program Files\ktdld\fqoyvvkjh.dll ldkny.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
rundll32.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
rundll32.exepid process 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe 3056 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
rundll32.exedescription pid process Token: SeDebugPrivilege 3056 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exeldkny.exepid process 2828 3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe 4604 ldkny.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.execmd.exeldkny.exedescription pid process target process PID 2828 wrote to memory of 4680 2828 3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe cmd.exe PID 2828 wrote to memory of 4680 2828 3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe cmd.exe PID 2828 wrote to memory of 4680 2828 3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe cmd.exe PID 4680 wrote to memory of 5028 4680 cmd.exe PING.EXE PID 4680 wrote to memory of 5028 4680 cmd.exe PING.EXE PID 4680 wrote to memory of 5028 4680 cmd.exe PING.EXE PID 4680 wrote to memory of 4604 4680 cmd.exe ldkny.exe PID 4680 wrote to memory of 4604 4680 cmd.exe ldkny.exe PID 4680 wrote to memory of 4604 4680 cmd.exe ldkny.exe PID 4604 wrote to memory of 3056 4604 ldkny.exe rundll32.exe PID 4604 wrote to memory of 3056 4604 ldkny.exe rundll32.exe PID 4604 wrote to memory of 3056 4604 ldkny.exe rundll32.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe"C:\Users\Admin\AppData\Local\Temp\3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2828 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ldkny.exe "C:\Users\Admin\AppData\Local\Temp\3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:4680 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:5028 -
C:\Users\Admin\AppData\Local\Temp\ldkny.exeC:\Users\Admin\AppData\Local\Temp\\ldkny.exe "C:\Users\Admin\AppData\Local\Temp\3f77bf57e73ac007bf7d0f0795b250f902a3d4575309b8b7f6949e689809a03e.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4604 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\ktdld\fqoyvvkjh.dll",Verify C:\Users\Admin\AppData\Local\Temp\ldkny.exe4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3056
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
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Filesize
407KB
MD5d4d8f3c14503b2fd1dd4cdf1a364144e
SHA1dc85ca47f137ddb1ed0a1a3adc12530968527962
SHA25609893e1d01c39d1ea0aefc8234191d36fb0dcc2ba34b1e7b308198bf6cbca61e
SHA51221fbbd22cb4ab9c20917c70ab5d37bd1c63803f1a4d6172cdd3cea82d87bcc323ccb0369fffec788b2d05db8f9ce2e501a2703d08064aaf48157975585900a3e
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Filesize
228KB
MD557ac4d364a5436a806eae740f1e0df97
SHA1b31a74fb245c04da38f55ea7ce23ac97610f3401
SHA25612aabe683943662cefa082b31dd43584599ca707b5f405c661c8c60f8e838393
SHA512e5176b0e9f43852fe3f027ee708c06561be1583c611bcbeb1d88f7ad9e0d86c339dbb92108ca8f3bd232391a7e77e6999b4d08b5fa1ecfc49a0c0a070d4af707