Analysis
- max time kernel
46s - max time network
130s - platform
ubuntu-18.04_amd64 - resource
ubuntu1804-amd64-20260513-en - resource tags
arch:amd64arch:i386image:ubuntu1804-amd64-20260513-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system - submitted
19/08/2026, 00:12
Behavioral task
behavioral1
Sample
pty3
Resource
ubuntu1804-amd64-20260513-en
10 signatures
150 seconds
General
- Target pty3
- Size 47KB
- Sample260819-ahcelstbpd
- SHA256 0d762c8cbba56cd827c0dc710688d7410840940b9994020b8e365b63d3ff316c
- MD5 b24c8affd984bc47b7a6c5bd11e58b16
- SHA1 cf93381bb17a8e4d82f9184efd10cf1da60986ca
- SHA512 9f31b32ca7da165a99353aee51378d2c1ba0122f47fd0ad09ebaabd1a8477815d99fdc3ff7d6bc0ed2c423be56b217f0695d8744a89ec21e99b59b35b84f1364
- SSDEEP 768:m3QPPFqEChAfmWegsbs6NBFRmU779+AMaE0ygNWthDpXDGsHBUlJvsRDEsdSvnZt:v1COips6bFRmU7Z4aE0ygNWtJNasHMOs
- TLSH T1C723F23B68B656D1D3B5D6FDE97E0AA0F9A1E00925A333415AE03CDC2139CB4055BFB2
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Detects Kaiten/Tsunami Payload 1 IoCs
resource yara_rule behavioral1/memory/1538-1-0x0000000000400000-0x000000000051add0-memory.dmp family_kaiten_v3 - Creates/modifies Cron job 1 TTPs 5 IoCs
Cron allows running tasks on a schedule, and is commonly used for malware persistence.
description ioc Process File opened for modification /var/spool/cron/crontabs/tmp.6SZ0lo crontab File opened for modification /var/spool/cron/crontabs/tmp.AJ524w crontab File opened for modification /var/spool/cron/crontabs/tmp.avbfXB crontab File opened for modification /var/spool/cron/crontabs/tmp.286I7F crontab File opened for modification /var/spool/cron/crontabs/tmp.Os7wFh crontab - Enumerates running processes
Discovers information about currently running processes on the system
- Indicator Removal: Timestomp 1 TTPs 10 IoCs
Adversaries may remove indicators of compromise from the host to evade detection.
pid Process 1567 touch 1613 sh 1634 touch 1653 sh 1654 touch 1566 sh 1593 sh 1594 touch 1614 touch 1633 sh -
resource yara_rule behavioral1/files/fstream-8.dat upx - Changes its process name 1 IoCs
description ioc pid Process Changes the process name, possibly in an attempt to hide itself nikj4mmj6shab2625toa3imj 1538 pty3 -
description ioc Process File opened for reading /proc/1068/cmdline pidof File opened for reading /proc/11/stat pidof File opened for reading /proc/950/cmdline pidof File opened for reading /proc/1181/cmdline pidof File opened for reading /proc/1309/cmdline pidof File opened for reading /proc/115/stat pidof File opened for reading /proc/1025/stat pidof File opened for reading /proc/1544/cmdline pidof File opened for reading /proc/83/cmdline pidof File opened for reading /proc/86/stat pidof File opened for reading /proc/560/stat pidof File opened for reading /proc/1021/cmdline pidof File opened for reading /proc/6/cmdline pidof File opened for reading /proc/12/stat pidof File opened for reading /proc/488/stat pidof File opened for reading /proc/98/stat pidof File opened for reading /proc/445/cmdline pidof File opened for reading /proc/1134/stat pidof File opened for reading /proc/1198/stat pidof File opened for reading /proc/721/cmdline pidof File opened for reading /proc/177/stat pidof File opened for reading /proc/1094/stat pidof File opened for reading /proc/35/cmdline pidof File opened for reading /proc/203/stat pidof File opened for reading /proc/1073/stat pidof File opened for reading /proc/1198/cmdline pidof File opened for reading /proc/269/stat pidof File opened for reading /proc/30/stat pidof File opened for reading /proc/660/stat pidof File opened for reading /proc/1538/cmdline pidof File opened for reading /proc/494/stat pidof File opened for reading /proc/660/stat pidof File opened for reading /proc/1037/stat pidof File opened for reading /proc/2/cmdline pidof File opened for reading /proc/1055/stat pidof File opened for reading /proc/18/stat pidof File opened for reading /proc/158/stat pidof File opened for reading /proc/1355/cmdline pidof File opened for reading /proc/83/stat pidof File opened for reading /proc/1033/cmdline pidof File opened for reading /proc/22/stat pidof File opened for reading /proc/161/cmdline pidof File opened for reading /proc/169/stat pidof File opened for reading /proc/541/cmdline pidof File opened for reading /proc/488/stat pidof File opened for reading /proc/1001/stat pidof File opened for reading /proc/303/cmdline pidof File opened for reading /proc/639/cmdline pidof File opened for reading /proc/165/stat pidof File opened for reading /proc/1101/cmdline pidof File opened for reading /proc/1538/stat pidof File opened for reading /proc/5/stat pidof File opened for reading /proc/25/cmdline pidof File opened for reading /proc/1055/cmdline pidof File opened for reading /proc/1168/stat pidof File opened for reading /proc/721/stat pidof File opened for reading /proc/903/cmdline pidof File opened for reading /proc/159/stat pidof File opened for reading /proc/448/stat pidof File opened for reading /proc/911/stat pidof File opened for reading /proc/98/cmdline pidof File opened for reading /proc/168/cmdline pidof File opened for reading /proc/423/cmdline pidof File opened for reading /proc/1055/stat pidof - Writes file to shm directory 1 IoCs
Malware can drop malicious files in the shm directory which will run directly from RAM.
description ioc Process File opened for modification /dev/shm/pty3 cp - Writes file to tmp directory 1 IoCs
Malware often drops required files in the /tmp directory.
description ioc Process File opened for modification /tmp/.bawtz pty3
Processes
-
/tmp/pty3/tmp/pty31⤵
- Changes its process name
- Writes file to tmp directory
PID:1538 -
/bin/shsh -c "pidof -x strace > /dev/null"2⤵PID:1539
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/bin/pidofpidof -x strace3⤵
- Reads runtime system information
PID:1540
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/bin/shsh -c "pidof -x tcpdump > /dev/null"2⤵PID:1544
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/bin/pidofpidof -x tcpdump3⤵
- Reads runtime system information
PID:1545
-
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/bin/shsh -c "cat /etc/inittab | grep -v \"/tmp/pty3\" > /etc/inittab2"2⤵PID:1549
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/bin/catcat /etc/inittab3⤵PID:1552
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/bin/grepgrep -v /tmp/pty33⤵PID:1553
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-
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/bin/shsh -c "crontab -l | grep /tmp/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /tmp/pty3 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1550
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/bin/grepgrep -v "no cron"3⤵PID:1557
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/bin/grepgrep /tmp/pty33⤵PID:1555
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/usr/bin/crontabcrontab -l3⤵PID:1554
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1560
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/usr/bin/crontabcrontab -l3⤵PID:1562
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-
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/bin/shsh -c "crontab -r"2⤵PID:1551
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/usr/bin/crontabcrontab -r3⤵PID:1556
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/bin/shsh -c "echo \"0:2345:respawn:/tmp/pty3\" >> /etc/inittab2"2⤵PID:1558
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1561
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/bin/catcat /etc/inittab23⤵PID:1563
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1564
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/bin/rmrm -rf /etc/inittab23⤵PID:1565
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1566 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1567
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/bin/shsh -c "/bin/uname -n"2⤵PID:1571
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/bin/uname/bin/uname -n3⤵PID:1573
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/bin/shsh -c "cp -f /tmp/pty3 /dev/shm/pty3"2⤵PID:1572
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/bin/cpcp -f /tmp/pty3 /dev/shm/pty33⤵
- Writes file to shm directory
PID:1574
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-
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/bin/shsh -c "cat /etc/inittab | grep -v \"/dev/shm/pty3\" > /etc/inittab2"2⤵PID:1578
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/bin/catcat /etc/inittab3⤵PID:1580
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/bin/grepgrep -v /dev/shm/pty33⤵PID:1581
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-
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/bin/shsh -c "crontab -l | grep /dev/shm/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /dev/shm/pty3 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1579
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/usr/bin/crontabcrontab -l3⤵PID:1582
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/bin/grepgrep /dev/shm/pty33⤵PID:1583
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/bin/grepgrep -v "no cron"3⤵PID:1584
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1588
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/usr/bin/crontabcrontab -l3⤵PID:1589
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-
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/bin/shsh -c "echo \"0:2345:respawn:/dev/shm/pty3\" >> /etc/inittab2"2⤵PID:1585
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1586
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/bin/catcat /etc/inittab23⤵PID:1590
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-
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1591
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/bin/rmrm -rf /etc/inittab23⤵PID:1592
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1593 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1594
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/bin/shsh -c "cp -f /tmp/pty3 /var/tmp/pty3"2⤵PID:1595
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/bin/cpcp -f /tmp/pty3 /var/tmp/pty33⤵PID:1596
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/tmp/pty3\" > /etc/inittab2"2⤵PID:1598
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/bin/catcat /etc/inittab3⤵PID:1600
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/bin/grepgrep -v /var/tmp/pty33⤵PID:1601
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/bin/shsh -c "crontab -l | grep /var/tmp/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/tmp/pty3 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1599
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/usr/bin/crontabcrontab -l3⤵PID:1602
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/bin/grepgrep -v "no cron"3⤵PID:1604
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/bin/grepgrep /var/tmp/pty33⤵PID:1603
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1608
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/usr/bin/crontabcrontab -l3⤵PID:1610
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/bin/shsh -c "echo \"0:2345:respawn:/var/tmp/pty3\" >> /etc/inittab2"2⤵PID:1605
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1606
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/bin/catcat /etc/inittab23⤵PID:1609
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1611
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/bin/rmrm -rf /etc/inittab23⤵PID:1612
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1613 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1614
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/bin/shsh -c "cp -f /tmp/pty3 /var/lock/pty3"2⤵PID:1615
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/bin/cpcp -f /tmp/pty3 /var/lock/pty33⤵PID:1616
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/lock/pty3\" > /etc/inittab2"2⤵PID:1618
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/bin/grepgrep -v /var/lock/pty33⤵PID:1621
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/bin/catcat /etc/inittab3⤵PID:1620
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/bin/shsh -c "crontab -l | grep /var/lock/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/lock/pty3 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1619
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/bin/grepgrep -v "no cron"3⤵PID:1624
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/usr/bin/crontabcrontab -l3⤵PID:1622
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/bin/grepgrep /var/lock/pty33⤵PID:1623
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1628
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/usr/bin/crontabcrontab -l3⤵PID:1630
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/bin/shsh -c "echo \"0:2345:respawn:/var/lock/pty3\" >> /etc/inittab2"2⤵PID:1625
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1626
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/bin/catcat /etc/inittab23⤵PID:1629
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1631
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/bin/rmrm -rf /etc/inittab23⤵PID:1632
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1633 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1634
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/bin/shsh -c "cp -f /tmp/pty3 /var/run/pty3"2⤵PID:1635
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/bin/cpcp -f /tmp/pty3 /var/run/pty33⤵PID:1636
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/run/pty3\" > /etc/inittab2"2⤵PID:1638
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/bin/grepgrep -v /var/run/pty33⤵PID:1641
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/bin/catcat /etc/inittab3⤵PID:1640
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/bin/shsh -c "crontab -l | grep /var/run/pty3 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/run/pty3 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1639
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/bin/grepgrep -v "no cron"3⤵PID:1644
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/usr/bin/crontabcrontab -l3⤵PID:1642
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/bin/grepgrep /var/run/pty33⤵PID:1643
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1648
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/usr/bin/crontabcrontab -l3⤵PID:1650
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/bin/shsh -c "echo \"0:2345:respawn:/var/run/pty3\" >> /etc/inittab2"2⤵PID:1645
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1646
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/bin/catcat /etc/inittab23⤵PID:1649
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1651
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/bin/rmrm -rf /etc/inittab23⤵PID:1652
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1653 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1654
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path /dev/shm/pty3
- Size 47KB
- SHA256 0d762c8cbba56cd827c0dc710688d7410840940b9994020b8e365b63d3ff316c
- MD5 b24c8affd984bc47b7a6c5bd11e58b16
- SHA1 cf93381bb17a8e4d82f9184efd10cf1da60986ca
- SHA512 9f31b32ca7da165a99353aee51378d2c1ba0122f47fd0ad09ebaabd1a8477815d99fdc3ff7d6bc0ed2c423be56b217f0695d8744a89ec21e99b59b35b84f1364
- SSDEEP 768:m3QPPFqEChAfmWegsbs6NBFRmU779+AMaE0ygNWthDpXDGsHBUlJvsRDEsdSvnZt:v1COips6bFRmU7Z4aE0ygNWtJNasHMOs
- TLSH T1C723F23B68B656D1D3B5D6FDE97E0AA0F9A1E00925A333415AE03CDC2139CB4055BFB2
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path /etc/inittab
- Size 83B
- SHA256 0a4eb5870807ef4406d093845baf96e7f8cc59effda08f32a4d73d489264d11a
- MD5 6665b7449ec290b0dd8d4d18c402d000
- SHA1 35f738f53b07e9a2a67ffc577888d42a180a48f0
- SHA512 ac4ad3cb5a7643a0c6f3efa942b31fe6d8f1527550d3e4992d1392f833c888fd3965ea71301e790943143ebaf7870ac623232253c85bb99b3e10c6163cd03a9f
- TLSH T104A00103F0712DAC91F0A1AA1A14018A82439700D6874B18C6433E72D208F0BBD75026
- MD5 SHA1 SHA512 TLSH
- Path /etc/inittab
- Size 113B
- SHA256 247ae0a8c28f9e39397c45a9e586b8b2c371878cf8814f9cf41c76aa05939552
- MD5 582c739181f12796f80db1f6ea7f916a
- SHA1 7c645a1c9a0de591d0b6a5b6682aa0d7dac9786f
- SHA512 8d6c2678e3eeb34094507622578f4acd36952a18374244a109c899a30ddbc1193943941fd697a6739994326fe700d43b031b24d8114e80c7cf5698b82d26c972
- TLSH T1A6B00207F4711DBC91F4A5AA1E54019A82435700D5474B18C5477D72D208F0B7D75166
- MD5 SHA1 SHA512 TLSH
- Path /etc/inittab2
- Size 54B
- SHA256 e5018fad1758921486984b6c0d39050ec65f06908d99387dc15363ca5557c581
- MD5 ffcc9669bca82a891cd1913d74957256
- SHA1 fc608c695927cfc3b8bd3d5e6fc7a28bdc04942d
- SHA512 4510b7b1eb8727ae6ba851908ac4fce20febb42c095cbf5b29c5acef7081fe0afa21a855eebb88d40668b330c69086dc1f07ead708b23fe0747215c3677beb19
- TLSH T1C3900203F0501D1C91B0A0990A00018582035700D5870B1881432D72D208F0B7D74002
- MD5 SHA1 SHA512 TLSH
- Path /etc/inittab2
- Size 142B
- SHA256 bf7a744dcb866fe6c59f07c77d2b579c84b057f79321028b6b45320e4f6a2eed
- MD5 5ff9d0108fcfd3fe6d507a5c71471ff7
- SHA1 dc713d40f4f57f8c428c4e69d8773ce4baa39299
- SHA512 ffca8f8bac306f7910a8d62ab68083ae78206bdbb7efcd4aaeb5bbf7a0bb56841fa70e359daf3954912c649779e409284c40e5ad3c7e562fe04c359c038bb834
- TLSH T151C04803F0322CBC84F0A2EA0E28008A82834300D1438B08C9073D72C208F0B7C7002A
- MD5 SHA1 SHA512 TLSH
- Path /etc/inittab2
- Size 25B
- SHA256 bf305607b10a91ee18ceef3ca7843f016eba8e25cfaa8c4bb88ae79c2c06f561
- MD5 d2bfd916c7f8e566ced31a47803f8b64
- SHA1 03a323e7ff70c521402bca605ed8d600ebd02320
- SHA512 2ddb3235d48a0c3111f8e37faa45e2e908c9876789e429fd252fd81fad5242f2bb0c1ab1c32aac0036b9c7608d8f0431812319d6102afd60b172a343e439985b
- MD5 SHA1 SHA512
- Path /var/spool/cron/crontabs/tmp.286I7F
- Size 387B
- SHA256 dcd1b78dd5c5f072b8e8f1e17e590e6b63b85f805caf7a169f95b6f704120634
- MD5 9cd82f9df8e4096e8e2c6e59a81ae9a9
- SHA1 cfa4b3c3eb5240ab05b0f38d2ab40409ddcb6993
- SHA512 d4af6d57d51d1d62c30998e31703edfdfd0ce0c4b676d80b1d7cb6f5020a9c9c0458ccc36e9538a002033a11ab223681ead36958b9166c7dcbcb2eff45f0ec0e
- TLSH T1AEE01234A6611CE539884A78199F71D51B837929502D6E40F1DE6524558D34BB650AB0
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.6SZ0lo
- Size 257B
- SHA256 8c574d12e8b3ba42beafad0f3f4a4a874c1644df59a8c9337fd52218d4115ec5
- MD5 144eb08b5c6ab592af2a7d5cf7eb9373
- SHA1 1be7beda2bba84d3da83b4eb3e313fde4d45591b
- SHA512 8378cb94b80129cde2d33375d0b5a32a1f13f30b29615f13f8754477b7bb0c539cdccc833e66386349d1fb369c364d5cefbf6ef3b56fa221eac4edb20b19b600
- TLSH T1FAD0A738BB602C703A154B38255B31996B83B97D902DAF50F1DE0524429D79FF750971
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.AJ524w
- Size 300B
- SHA256 67bd183f5f061d30549fcc55fda6e8ccdeba5401e3d551c4ecdada5c38d21e79
- MD5 e91efe8a621967369e0346f9e3e7d6c9
- SHA1 69b6cd7f90a7ecfc649ee9c8af099302bec5bd05
- SHA512 408b23a26a142ecfa8bcc616adb75a6d1e07fe53d69cc3b2a7b3b59036fad9566ce746d8e113f28f8daa959391274181b406609c6388cb0782f4cd354c1d4611
- TLSH T1E2E0C234B7602CA039444B38255B31C92B83B92D902DAE40F1DE1524418D34BF610970
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.Os7wFh
- Size 214B
- SHA256 54133da6a6892a9ff74c153f168d02294b8b10a116665131bf1c6cd8a9faa5a0
- MD5 1f038ba4a15e4f9351d02ac3ff152dc4
- SHA1 817e60ef67ed3f9dcd33d2dd395f01c7189cb856
- SHA512 683afe74774ce8240601abaf46862be3bd55757f2c6ec6d5b0dbe8bc0b0d1a5eb4dc9b4e9fe318de0a1dec0562858a4ab3ca9ee9ce41ff95ddd3f465d056ab3f
- TLSH T161D022387B202C303A050B18216B225D6A83E57DA01DEE40F2ED0028029E39EBB50971
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.avbfXB
- Size 344B
- SHA256 dbf04e849655a8fae48b620fd32723b5deefe1441151f007e92cb3630f20c96b
- MD5 eff20fa953e413ea52ff64c963432b7a
- SHA1 d1c3dc7b33d94270a7918e1a113a29767879b578
- SHA512 2671e7442de8d72438058fea806a7254c779a3bdb327afa5c9f8312074fea141ec4fc7c4936f7654418060832bc7bc21eec81b053d149d6f127a99963d200635
- TLSH T161E08634B7711CE539884B78199F71D91B83B92D502D6E40F1DE5524558D34BF650AB0
- MD5 SHA1 SHA512 TLSH