Indicator Removal on Host: Timestomp

3PARA RAT has a command to set certain attributes such as creation/modification timestamps on files.^[13]

APT28 has performed timestomping on victim files.^[26]

APT32 has used scheduled task raw XML with a backdated timestamp of June 2, 2016. The group has also set the creation time of the files dropped by the second stage of the exploit to match the creation time of kernel32.dll. Additionally, APT32 has used a random value to modify the timestamp of the file storing the clientID.^[27][28][29]

Attor has manipulated the time of last access to files and registry keys after they have been created or modified.^[24]

Bankshot modifies the time of a file as specified by the control server.^[8]

China Chopper's server component can change the timestamp of files.^[19][20][21]

Cobalt Strike will timestomp any files or payloads placed on a target machine to help them blend in.^[2]

The Derusbi malware supports timestomping.^[4][5]

Elise performs timestomping of a CAB file it creates.^[12]

Empire can timestomp any files or payloads placed on a target machine to help them blend in.^[3]

FALLCHILL can modify file or directory timestamps.^[14]

For early Gazer versions, the compilation timestamp was faked.^[9]

InvisiMole samples were timestomped by the authors by setting the PE timestamps to all zero values. InvisiMole also has a built-in command to modify file times.^[17]

KeyBoy time-stomped its DLL in order to evade detection.^[22]

Several Lazarus Group malware families use timestomping, including modifying the last write timestamp of a specified Registry key to a random date, as well as copying the timestamp for legitimate .exe files (such as calc.exe or mspaint.exe) to its dropped files.^{[30][31][32][33]}

Many Misdat samples were programmed using Borland Delphi, which will mangle the default PE compile timestamp of a file.^[10]

OwaAuth has a command to timestop a file or directory.^[11]

POSHSPY modifies timestamps of all downloaded executables to match a randomly selected file created prior to 2013.^[7]

PowerStallion modifies the MAC times of its local log files to match that of the victim's desktop.ini file.^[23]

Psylo has a command to conduct timestomping by setting a specified file’s timestamps to match those of a system file in the System32 directory.^[18]

Rocke has changed the time stamp of certain files.^[35]

SEASHARPEE can timestomp files on victims using a Web shell.^[15]

Shamoon can change the modified time for files to evade forensic detection.^[25]

After creating a new service for persistence, TDTESS sets the file creation time for the service to the creation time of the victim's legitimate svchost.exe file.^[6]

TEMP.Veles used timestomping to modify the $STANDARD_INFORMATION attribute on tools.^[34]

USBStealer sets the timestamps of its dropper files to the last-access and last-write timestamps of a standard Windows library chosen on the system.^[16]