Analysis
- max time kernel
103s - max time network
129s - 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
11/08/2026, 00:16
Behavioral task
behavioral1
Sample
pty4
Resource
ubuntu1804-amd64-20260513-en
10 signatures
150 seconds
General
- Target pty4
- Size 43KB
- Sample260811-akyevsbd78
- SHA256 8d411d1ec4327e5a10b8ffddaacdac17a0a6acab43db81202119604b35c7317b
- MD5 e0c0873263eb23d5092363f938ea9ca2
- SHA1 0ccd5083fa4a223b8b4cb2305c34e98c13accb92
- SHA512 2c814069c9ee07dca10adec30774b4c5e1fea06e58007fdebe3214aa0a4f20b56e333df201318e336a6b773a63603eb7f2f91a78856665bbdcd71c4a370fd01d
- SSDEEP 768:+dFzMBVZYHMJjNN5/hb1dziL2ts+hL7+BoPLJN1bTZCwWkx1ASMCijh:QzyZYkjrb1duL+nRX13ZCdkx1ASXi1
- TLSH T17713029051801BBBFA9A763A68C10D5CB677F0C18C4FA78F27A46CAD24B253E8534CD6
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Detects Kaiten/Tsunami Payload 1 IoCs
resource yara_rule behavioral1/memory/1516-1-0x0000000008048000-0x0000000008061884-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.X9BKJf crontab File opened for modification /var/spool/cron/crontabs/tmp.wt4QAl crontab File opened for modification /var/spool/cron/crontabs/tmp.LkK6yr crontab File opened for modification /var/spool/cron/crontabs/tmp.RmG7Vw crontab File opened for modification /var/spool/cron/crontabs/tmp.xy818x 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 1574 touch 1633 sh 1634 touch 1545 sh 1572 sh 1593 sh 1594 touch 1613 sh 1614 touch 1546 touch -
resource yara_rule behavioral1/files/fstream-8.dat upx - Changes its process name 1 IoCs
description pid Process Changes the process name, possibly in an attempt to hide itself 1516 pty4 -
description ioc Process File opened for reading /proc/1516/stat pidof File opened for reading /proc/493/cmdline pidof File opened for reading /proc/1085/cmdline pidof File opened for reading /proc/26/stat pidof File opened for reading /proc/941/cmdline pidof File opened for reading /proc/1124/cmdline pidof File opened for reading /proc/1336/cmdline pidof File opened for reading /proc/690/stat pidof File opened for reading /proc/955/stat pidof File opened for reading /proc/960/cmdline pidof File opened for reading /proc/1127/stat pidof File opened for reading /proc/18/stat pidof File opened for reading /proc/177/cmdline pidof File opened for reading /proc/1057/cmdline pidof File opened for reading /proc/3/stat pidof File opened for reading /proc/510/cmdline pidof File opened for reading /proc/941/stat pidof File opened for reading /proc/1508/cmdline pidof File opened for reading /proc/35/stat pidof File opened for reading /proc/86/cmdline pidof File opened for reading /proc/182/cmdline pidof File opened for reading /proc/452/stat pidof File opened for reading /proc/181/stat pidof File opened for reading /proc/169/stat pidof File opened for reading /proc/170/stat pidof File opened for reading /proc/173/stat pidof File opened for reading /proc/994/stat pidof File opened for reading /proc/1022/cmdline pidof File opened for reading /proc/1362/cmdline pidof File opened for reading /proc/12/cmdline pidof File opened for reading /proc/481/cmdline pidof File opened for reading /proc/1065/stat pidof File opened for reading /proc/1514/stat pidof File opened for reading /proc/18/cmdline pidof File opened for reading /proc/115/stat pidof File opened for reading /proc/173/cmdline pidof File opened for reading /proc/481/cmdline pidof File opened for reading /proc/329/stat pidof File opened for reading /proc/938/cmdline pidof File opened for reading /proc/1069/stat pidof File opened for reading /proc/1079/stat pidof File opened for reading /proc/10/stat pidof File opened for reading /proc/15/stat pidof File opened for reading /proc/180/cmdline pidof File opened for reading /proc/744/stat pidof File opened for reading /proc/681/cmdline pidof File opened for reading /proc/1031/cmdline pidof File opened for reading /proc/1098/cmdline pidof File opened for reading /proc/1183/cmdline pidof File opened for reading /proc/1018/stat pidof File opened for reading /proc/1190/stat pidof File opened for reading /proc/25/cmdline pidof File opened for reading /proc/581/cmdline pidof File opened for reading /proc/1190/stat pidof File opened for reading /proc/1287/cmdline pidof File opened for reading /proc/175/stat pidof File opened for reading /proc/1008/cmdline pidof File opened for reading /proc/1109/stat pidof File opened for reading /proc/82/cmdline pidof File opened for reading /proc/1053/cmdline pidof File opened for reading /proc/78/cmdline pidof File opened for reading /proc/513/stat pidof File opened for reading /proc/1074/stat pidof File opened for reading /proc/1518/cmdline 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/pty4 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 pty4
Processes
-
/tmp/pty4/tmp/pty41⤵
- Changes its process name
- Writes file to tmp directory
PID:1516 -
/bin/shsh -c "pidof -x strace > /dev/null"2⤵PID:1517
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/bin/pidofpidof -x strace3⤵
- Reads runtime system information
PID:1518
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-
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/bin/shsh -c "pidof -x tcpdump > /dev/null"2⤵PID:1521
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/bin/pidofpidof -x tcpdump3⤵
- Reads runtime system information
PID:1522
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/bin/shsh -c "cat /etc/inittab | grep -v \"/tmp/pty4\" > /etc/inittab2"2⤵PID:1527
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/bin/catcat /etc/inittab3⤵PID:1530
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/bin/grepgrep -v /tmp/pty43⤵PID:1531
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-
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/bin/shsh -c "crontab -l | grep /tmp/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /tmp/pty4 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1528
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/bin/grepgrep -v "no cron"3⤵PID:1535
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/usr/bin/crontabcrontab -l3⤵PID:1532
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/bin/grepgrep /tmp/pty43⤵PID:1534
-
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1538
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/usr/bin/crontabcrontab -l3⤵PID:1540
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-
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/bin/shsh -c "crontab -r"2⤵PID:1529
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/usr/bin/crontabcrontab -r3⤵PID:1533
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-
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/bin/shsh -c "echo \"0:2345:respawn:/tmp/pty4\" >> /etc/inittab2"2⤵PID:1536
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1539
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/bin/catcat /etc/inittab23⤵PID:1541
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-
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1542
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/bin/rmrm -rf /etc/inittab23⤵PID:1543
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1545 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1546
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-
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/bin/shsh -c "/bin/uname -n"2⤵PID:1549
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/bin/uname/bin/uname -n3⤵PID:1551
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/bin/shsh -c "cp -f /tmp/pty4 /dev/shm/pty4"2⤵PID:1550
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/bin/cpcp -f /tmp/pty4 /dev/shm/pty43⤵
- Writes file to shm directory
PID:1552
-
-
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/bin/shsh -c "cat /etc/inittab | grep -v \"/dev/shm/pty4\" > /etc/inittab2"2⤵PID:1556
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/bin/catcat /etc/inittab3⤵PID:1558
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/bin/grepgrep -v /dev/shm/pty43⤵PID:1559
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-
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/bin/shsh -c "crontab -l | grep /dev/shm/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /dev/shm/pty4 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1557
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/bin/grepgrep -v "no cron"3⤵PID:1563
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/bin/grepgrep /dev/shm/pty43⤵PID:1562
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/usr/bin/crontabcrontab -l3⤵PID:1561
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-
/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1567
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/usr/bin/crontabcrontab -l3⤵PID:1569
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-
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/bin/shsh -c "echo \"0:2345:respawn:/dev/shm/pty4\" >> /etc/inittab2"2⤵PID:1564
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1565
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/bin/catcat /etc/inittab23⤵PID:1568
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-
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1570
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/bin/rmrm -rf /etc/inittab23⤵PID:1571
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1572 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1574
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-
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/bin/shsh -c "cp -f /tmp/pty4 /var/tmp/pty4"2⤵PID:1575
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/bin/cpcp -f /tmp/pty4 /var/tmp/pty43⤵PID:1576
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/tmp/pty4\" > /etc/inittab2"2⤵PID:1578
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/bin/grepgrep -v /var/tmp/pty43⤵PID:1581
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/bin/catcat /etc/inittab3⤵PID:1580
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-
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/bin/shsh -c "crontab -l | grep /var/tmp/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/tmp/pty4 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1579
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/bin/grepgrep -v "no cron"3⤵PID:1584
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/usr/bin/crontabcrontab -l3⤵PID:1582
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/bin/grepgrep /var/tmp/pty43⤵PID:1583
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1588
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/usr/bin/crontabcrontab -l3⤵PID:1590
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/bin/shsh -c "echo \"0:2345:respawn:/var/tmp/pty4\" >> /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:1589
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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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-
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/bin/shsh -c "cp -f /tmp/pty4 /var/lock/pty4"2⤵PID:1595
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/bin/cpcp -f /tmp/pty4 /var/lock/pty43⤵PID:1596
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/lock/pty4\" > /etc/inittab2"2⤵PID:1598
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/bin/grepgrep -v /var/lock/pty43⤵PID:1600
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/bin/catcat /etc/inittab3⤵PID:1599
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/bin/shsh -c "crontab -l | grep /var/lock/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/lock/pty4 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1601
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/bin/grepgrep -v "no cron"3⤵PID:1604
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/bin/grepgrep /var/lock/pty43⤵PID:1603
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/usr/bin/crontabcrontab -l3⤵PID:1602
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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/lock/pty4\" >> /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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-
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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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-
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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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-
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/bin/shsh -c "cp -f /tmp/pty4 /var/run/pty4"2⤵PID:1615
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/bin/cpcp -f /tmp/pty4 /var/run/pty43⤵PID:1616
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/run/pty4\" > /etc/inittab2"2⤵PID:1618
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/bin/catcat /etc/inittab3⤵PID:1620
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/bin/grepgrep -v /var/run/pty43⤵PID:1621
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-
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/bin/shsh -c "crontab -l | grep /var/run/pty4 | grep -v \"no cron\" || (crontab -l ; echo \"* * * * * /var/run/pty4 > /dev/null 2>&1 &\") | crontab -"2⤵PID:1619
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/bin/grepgrep -v "no cron"3⤵PID:1624
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/bin/grepgrep /var/run/pty43⤵PID:1623
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/usr/bin/crontabcrontab -l3⤵PID:1622
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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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-
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/bin/shsh -c "echo \"0:2345:respawn:/var/run/pty4\" >> /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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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path /dev/shm/pty4
- Size 43KB
- SHA256 8d411d1ec4327e5a10b8ffddaacdac17a0a6acab43db81202119604b35c7317b
- MD5 e0c0873263eb23d5092363f938ea9ca2
- SHA1 0ccd5083fa4a223b8b4cb2305c34e98c13accb92
- SHA512 2c814069c9ee07dca10adec30774b4c5e1fea06e58007fdebe3214aa0a4f20b56e333df201318e336a6b773a63603eb7f2f91a78856665bbdcd71c4a370fd01d
- SSDEEP 768:+dFzMBVZYHMJjNN5/hb1dziL2ts+hL7+BoPLJN1bTZCwWkx1ASMCijh:QzyZYkjrb1duL+nRX13ZCdkx1ASXi1
- TLSH T17713029051801BBBFA9A763A68C10D5CB677F0C18C4FA78F27A46CAD24B253E8534CD6
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path /etc/inittab
- Size 83B
- SHA256 7fbf43311d4796b4039c1b4336eee7ca6552be98203d1858d14cb6e37ea877e5
- MD5 c3df7eba718ab5494124e12efd721afb
- SHA1 1b42fd91a51a3a6a2a3e2baec1cd8abadd2c631f
- SHA512 f424c4d2d6f53c5c2ef64db057b52803146a17cf5492728709ecb7f2b07b8349890d8be3a689aeb68cd64333c1b527a8a39943b119a57e07c4ea97af76f1787f
- TLSH T103A00103F0712D9EA1F0A1A81B140202A2439700DE876B18C6433F72E20AF2AAD75026
- MD5 SHA1 SHA512 TLSH
- Path /etc/inittab
- Size 113B
- SHA256 7afb3d064700bcb2fec3b727de8e99eb2afebb919d4222ad3a92936b0ed714ae
- MD5 3eb623e3ff1934c48a37ba1dd32cebaf
- SHA1 42cad0982531e126bcf501cc46b41e590c5cc7fc
- SHA512 f3fc2e0504562090b2f9f42d8b90bfa074734dc9c2048e27e0f4e103dabca99a2abf471b2d61ec35001d03ce4b796a8cd140f20f74d35c83a52819dfececac3c
- TLSH T162B00207F4711DAEA1F4A5A81F540216A2435700DD476B18C5477F72E20AF2A6D75166
- MD5 SHA1 SHA512 TLSH
- Path /etc/inittab2
- Size 54B
- SHA256 031e3a9a99c03a49fea757df0d3ff52fc5dbcc07d37f2674efe21cae6529c370
- MD5 c61fe27473535c7ac532d70ed8182832
- SHA1 d5f3a809df3470eae8dd773da6727c33b46bf1dc
- SHA512 6d2e16886c925795851c4bde0aca83ef7618530756f83efda7f3102970b80d5ad300454ec2473b822c6cc058a57b63d2dd79d5d0a88852ecc184a1182ea6b3a8
- TLSH T160900203F0501D0DA1B0A0980B000201A2035700DD871B1881432E72E20AF2A6D74002
- MD5 SHA1 SHA512 TLSH
- Path /etc/inittab2
- Size 142B
- SHA256 53aca2a49a912146645bbb47d0abb1827520434abb907cadf77bc55b2572b099
- MD5 bd60346a01f1b4bde9993a6baa8183a2
- SHA1 ec6a317ad472790b18d0b662ac6992e226041c3e
- SHA512 c960e7d898096547cecee2376226203f2ef9ae88185b6ad52a4ecac742aa60c1ea699fc167a86201b9bc0102f029acc296c8a7bcd4e9f5793d5310cdb4faa098
- TLSH T1D6C04C03F0311CAEA4F061E80F180202A2434300DD436B08C5073F72E20AF2A6C70026
- MD5 SHA1 SHA512 TLSH
- Path /etc/inittab2
- Size 25B
- SHA256 a1a915c2d2d8b0997cea0c5885f31609e34ba6f5e9761f7a1fe5c292ae743dea
- MD5 6b150c167c13fb201746d5c31cb071c6
- SHA1 529600487af6ceb1f6686fea21eb40fd722ee626
- SHA512 4b62ff9c05083a4a7f603308e3c673b031eeb4813c26fd5dc130e377609558a8c07818657f96b38f7eaa2fc0a0915b90865620f230a056dc4ec8bb87ee4a9213
- MD5 SHA1 SHA512
- Path /var/spool/cron/crontabs/tmp.LkK6yr
- Size 300B
- SHA256 fa90b33987c21ba335ee65eed88e630e53a53aa2f4c3020c6093c4f35916bc40
- MD5 cba2376ecffdf7df0a46b84905d28fba
- SHA1 65b03cb099116bd8c2c26cca2d8c4c87082c5088
- SHA512 f7d13b5ab88707415a89367b2ee692c4e2a34179af7da69314618d16441d37a30d17a472ecca69455f1e5baedc08876a92cfd5f32a513bfd0cd94d1b495dcd90
- TLSH T1EBE0C234BB602CA03D954B782A5B60842B83B925842DAE41F1DE1430418E74FF610930
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.RmG7Vw
- Size 344B
- SHA256 42a6a52310ed300864dbb271fbd21f0f9e7d9e8085e5b8759ccb7e50e38a5efb
- MD5 a22adbad80db64463c846faab3a169cb
- SHA1 a08beda504bbb7fa9c76036e83a919312ea042c0
- SHA512 dfbb1440415f67dc54e23e7fe80863d5fbff5bbf472cd418453fa0f2768c4f0f2d76e4238f1f65c67d4f26c532d0eb8e97346b808ea6872d79ec4abcf1c543ac
- TLSH T168E08634BB711CE53D994B781A9F70942B837925442D6E41F1DE6430558E74FF650A30
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.X9BKJf
- Size 214B
- SHA256 e7abb4025e2acbb72d75a752708ba276e5ab13170a4c54e9fd06c9c414e41d5d
- MD5 8cf59e0b5b1f3907b9fd78b4534812f3
- SHA1 4be26006298328e492bf8134210b704c42c37004
- SHA512 e8e920a0e498ee018c7d422ddc66c42e4147452067f1458fb304c93f85fc5e5d94a19b523aa3ae61871272bf5daf1a24e97b60306d86038419e5cf3a30d3deec
- TLSH T198D022387F206C302E950B59255B21186B82A579801DFE41E2ED1424028EB9FBB50D31
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.wt4QAl
- Size 257B
- SHA256 2e4b6122505654b5520aa8711eaaab03cb337e770f584ec817ea722ff1382b9c
- MD5 571cb74854a5ec853611714151cd7f51
- SHA1 b89893fed1b92bc26702f391706619a475d1610c
- SHA512 3e55c346621bc9c60c20f1fe4b82477d64185b7ed58639a198a7f95c9678ede37262cfd8054c8134becd5415b49979cac89b2711d9baf4595b389efd5efe5238
- TLSH T164D02E38BB602C703D550B282A4B20482B83B929802DAE41F1DE0420428EB4FB610930
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.xy818x
- Size 387B
- SHA256 eb886c97d34fe0cb92f2b0a7e108c58901dc8304e7ee3286e3a6eab8fc42fbaa
- MD5 703c06b29607ca57bab9c5ea8fea3870
- SHA1 391ef80efd3b87b0594d63197e06ccf78b6930d9
- SHA512 093015d4072fca3e4710678a8ae646bc3428ae6042ff957e717f61d2b696a8154779a638f6739f9b1c9b3205c2c78a3ce880c0caa5a28fb547d820ae5d360e42
- TLSH T1D4E01234BA615CE53D994A781A9F70942B837925442D6E42F1DE6430558E74FA550A30
- MD5 SHA1 SHA512 TLSH