Analysis
- max time kernel
149s - max time network
149s - 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
29/07/2026, 12:20
Behavioral task
behavioral1
Sample
pty4
Resource
ubuntu1804-amd64-20260513-en
10 signatures
150 seconds
General
- Target pty4
- Size 43KB
- Sample260729-phtffstfkc
- SHA256 7d22fabcc98916294775e10101526492c105b583ccc9cf3e2edad9187dab4f14
- MD5 7a037c0a072ef513fbf06b9e319ec708
- SHA1 cc8b716db51426ad7c85c4fc349fb0191603be7e
- SHA512 63e7f736b548e73a6f6809c4542aa38bbcf073f2e15093838fb32287fbcdd1dc5864b48736c76f8be2fc67b30e4bab559b521576a9b48f6d04b9fad86341d344
- SSDEEP 768:OIkvhd+xT8f2HeAr5+BrnMFLu/WoIvkCnutEJ2OKf8RE79A+tKjgVtCHmVXljx:XGy58ULujgutEqr7qljQtCHm5lF
- TLSH T1451302828674D477F58BB8F664C059DBF372B4940FEDBAC522212C9BA5361B046BCCE4
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Detects Kaiten/Tsunami Payload 1 IoCs
resource yara_rule behavioral1/memory/1500-1-0x0000000008048000-0x0000000008061864-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.osRRR1 crontab File opened for modification /var/spool/cron/crontabs/tmp.l6fOo3 crontab File opened for modification /var/spool/cron/crontabs/tmp.sfW8p5 crontab File opened for modification /var/spool/cron/crontabs/tmp.CeQes8 crontab File opened for modification /var/spool/cron/crontabs/tmp.QBFKxa 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 1528 sh 1529 touch 1552 sh 1572 sh 1573 touch 1592 sh 1593 touch 1612 sh 1553 touch 1613 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 1500 pty4 -
description ioc Process File opened for reading /proc/171/stat pidof File opened for reading /proc/710/stat pidof File opened for reading /proc/977/stat pidof File opened for reading /proc/1353/cmdline pidof File opened for reading /proc/filesystems cp File opened for reading /proc/16/stat pidof File opened for reading /proc/474/cmdline pidof File opened for reading /proc/1010/stat pidof File opened for reading /proc/1101/stat pidof File opened for reading /proc/913/stat pidof File opened for reading /proc/160/cmdline pidof File opened for reading /proc/476/stat pidof File opened for reading /proc/911/stat pidof File opened for reading /proc/1497/cmdline pidof File opened for reading /proc/1393/cmdline pidof File opened for reading /proc/79/cmdline pidof File opened for reading /proc/474/stat pidof File opened for reading /proc/1332/stat pidof File opened for reading /proc/1353/stat pidof File opened for reading /proc/665/cmdline pidof File opened for reading /proc/1041/cmdline pidof File opened for reading /proc/23/stat pidof File opened for reading /proc/23/cmdline pidof File opened for reading /proc/32/cmdline pidof File opened for reading /proc/35/stat pidof File opened for reading /proc/457/stat pidof File opened for reading /proc/82/stat pidof File opened for reading /proc/1010/cmdline pidof File opened for reading /proc/159/cmdline pidof File opened for reading /proc/170/stat pidof File opened for reading /proc/673/cmdline pidof File opened for reading /proc/1059/cmdline pidof File opened for reading /proc/1188/cmdline pidof File opened for reading /proc/1267/cmdline pidof File opened for reading /proc/1504/stat pidof File opened for reading /proc/26/stat pidof File opened for reading /proc/26/cmdline pidof File opened for reading /proc/1045/stat pidof File opened for reading /proc/1267/stat pidof File opened for reading /proc/1107/stat pidof File opened for reading /proc/1498/cmdline pidof File opened for reading /proc/82/cmdline pidof File opened for reading /proc/164/cmdline pidof File opened for reading /proc/1001/cmdline pidof File opened for reading /proc/1315/stat pidof File opened for reading /proc/30/cmdline pidof File opened for reading /proc/462/stat pidof File opened for reading /proc/465/cmdline pidof File opened for reading /proc/549/cmdline pidof File opened for reading /proc/935/cmdline pidof File opened for reading /proc/1068/stat pidof File opened for reading /proc/10/cmdline pidof File opened for reading /proc/16/cmdline pidof File opened for reading /proc/11/cmdline pidof File opened for reading /proc/513/stat pidof File opened for reading /proc/162/stat pidof File opened for reading /proc/982/stat pidof File opened for reading /proc/24/cmdline pidof File opened for reading /proc/21/cmdline pidof File opened for reading /proc/80/stat pidof File opened for reading /proc/98/cmdline pidof File opened for reading /proc/684/stat pidof File opened for reading /proc/98/cmdline pidof File opened for reading /proc/689/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/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
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/tmp/pty4/tmp/pty41⤵
- Changes its process name
- Writes file to tmp directory
PID:1500 -
/bin/shsh -c "pidof -x strace > /dev/null"2⤵PID:1501
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/bin/pidofpidof -x strace3⤵
- Reads runtime system information
PID:1502
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-
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/bin/shsh -c "pidof -x tcpdump > /dev/null"2⤵PID:1503
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/bin/pidofpidof -x tcpdump3⤵
- Reads runtime system information
PID:1504
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-
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/bin/shsh -c "cat /etc/inittab | grep -v \"/tmp/pty4\" > /etc/inittab2"2⤵PID:1509
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/bin/catcat /etc/inittab3⤵PID:1511
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/bin/grepgrep -v /tmp/pty43⤵PID:1512
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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:1510
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/bin/grepgrep /tmp/pty43⤵PID:1515
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/bin/grepgrep -v "no cron"3⤵PID:1516
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/usr/bin/crontabcrontab -l3⤵PID:1514
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1520
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/usr/bin/crontabcrontab -l3⤵PID:1523
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-
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/bin/shsh -c "crontab -r"2⤵PID:1513
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/usr/bin/crontabcrontab -r3⤵PID:1517
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-
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/bin/shsh -c "echo \"0:2345:respawn:/tmp/pty4\" >> /etc/inittab2"2⤵PID:1518
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1521
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/bin/catcat /etc/inittab23⤵PID:1524
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-
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1526
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/bin/rmrm -rf /etc/inittab23⤵PID:1527
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1528 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1529
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-
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/bin/shsh -c "/bin/uname -n"2⤵PID:1532
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/bin/uname/bin/uname -n3⤵PID:1534
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/bin/shsh -c "cp -f /tmp/pty4 /dev/shm/pty4"2⤵PID:1533
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/bin/cpcp -f /tmp/pty4 /dev/shm/pty43⤵
- Writes file to shm directory
PID:1535
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-
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/bin/shsh -c "cat /etc/inittab | grep -v \"/dev/shm/pty4\" > /etc/inittab2"2⤵PID:1537
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/bin/grepgrep -v /dev/shm/pty43⤵PID:1540
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/bin/catcat /etc/inittab3⤵PID:1538
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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:1539
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/bin/grepgrep -v "no cron"3⤵PID:1543
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/bin/grepgrep /dev/shm/pty43⤵PID:1542
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/usr/bin/crontabcrontab -l3⤵PID:1541
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1547
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/usr/bin/crontabcrontab -l3⤵PID:1549
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-
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/bin/shsh -c "echo \"0:2345:respawn:/dev/shm/pty4\" >> /etc/inittab2"2⤵PID:1544
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1545
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/bin/catcat /etc/inittab23⤵PID:1548
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-
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1550
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/bin/rmrm -rf /etc/inittab23⤵PID:1551
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1552 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1553
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-
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/bin/shsh -c "cp -f /tmp/pty4 /var/tmp/pty4"2⤵PID:1554
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/bin/cpcp -f /tmp/pty4 /var/tmp/pty43⤵PID:1555
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-
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/tmp/pty4\" > /etc/inittab2"2⤵PID:1557
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/bin/grepgrep -v /var/tmp/pty43⤵PID:1559
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/bin/catcat /etc/inittab3⤵PID:1558
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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:1560
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/bin/grepgrep -v "no cron"3⤵PID:1563
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/bin/grepgrep /var/tmp/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:1566
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/usr/bin/crontabcrontab -l3⤵PID:1568
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-
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/bin/shsh -c "echo \"0:2345:respawn:/var/tmp/pty4\" >> /etc/inittab2"2⤵PID:1564
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1567
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/bin/catcat /etc/inittab23⤵PID:1569
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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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/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:1573
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/bin/shsh -c "cp -f /tmp/pty4 /var/lock/pty4"2⤵PID:1574
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/bin/cpcp -f /tmp/pty4 /var/lock/pty43⤵PID:1575
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/lock/pty4\" > /etc/inittab2"2⤵PID:1577
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/bin/grepgrep -v /var/lock/pty43⤵PID:1579
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/bin/catcat /etc/inittab3⤵PID:1578
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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:1580
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/bin/grepgrep -v "no cron"3⤵PID:1583
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/bin/grepgrep /var/lock/pty43⤵PID:1582
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/usr/bin/crontabcrontab -l3⤵PID:1581
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1586
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/usr/bin/crontabcrontab -l3⤵PID:1588
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/bin/shsh -c "echo \"0:2345:respawn:/var/lock/pty4\" >> /etc/inittab2"2⤵PID:1584
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1587
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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:1590
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/bin/rmrm -rf /etc/inittab23⤵PID:1591
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1592 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1593
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-
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/bin/shsh -c "cp -f /tmp/pty4 /var/run/pty4"2⤵PID:1594
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/bin/cpcp -f /tmp/pty4 /var/run/pty43⤵
- Reads runtime system information
PID:1595
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/run/pty4\" > /etc/inittab2"2⤵PID:1597
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/bin/grepgrep -v /var/run/pty43⤵PID:1599
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/bin/catcat /etc/inittab3⤵PID:1598
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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:1600
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/bin/grepgrep -v "no cron"3⤵PID:1603
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/bin/grepgrep /var/run/pty43⤵PID:1602
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/usr/bin/crontabcrontab -l3⤵PID:1601
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1606
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/usr/bin/crontabcrontab -l3⤵PID:1608
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/bin/shsh -c "echo \"0:2345:respawn:/var/run/pty4\" >> /etc/inittab2"2⤵PID:1604
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1607
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/bin/catcat /etc/inittab23⤵PID:1609
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1610
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/bin/rmrm -rf /etc/inittab23⤵PID:1611
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1612 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1613
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path /dev/shm/pty4
- Size 43KB
- SHA256 7d22fabcc98916294775e10101526492c105b583ccc9cf3e2edad9187dab4f14
- MD5 7a037c0a072ef513fbf06b9e319ec708
- SHA1 cc8b716db51426ad7c85c4fc349fb0191603be7e
- SHA512 63e7f736b548e73a6f6809c4542aa38bbcf073f2e15093838fb32287fbcdd1dc5864b48736c76f8be2fc67b30e4bab559b521576a9b48f6d04b9fad86341d344
- SSDEEP 768:OIkvhd+xT8f2HeAr5+BrnMFLu/WoIvkCnutEJ2OKf8RE79A+tKjgVtCHmVXljx:XGy58ULujgutEqr7qljQtCHm5lF
- TLSH T1451302828674D477F58BB8F664C059DBF372B4940FEDBAC522212C9BA5361B046BCCE4
- 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.CeQes8
- Size 344B
- SHA256 189e7a65efc8863e478e0dfb05e4569e3ed7bad04801d6b6584eb6334f60c7e0
- MD5 4ecc5a7376edeae0cd0f0caa0b972c2a
- SHA1 138e63e9fc4ad77ff95513b6f699f63afc34f772
- SHA512 5a489ee4bf8886d3db338188938fc909c8ebc19cc82741224ecf22d7b40b53e015cbf6cb329483968ab7af244a49b660f82ca7f63cc2346e3cb77cc8e2251cba
- TLSH T162E0863877B01CF53D894A781A9F70996BC37569442D6E81F1DE6434514F30BE650A30
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.QBFKxa
- Size 387B
- SHA256 4eef670b685fbc382e8d17bdd2a6d272bcea29dd8f3dba8f766536ba8058df07
- MD5 eaa3440cb44b09ebc5028b2543ebe545
- SHA1 701fe5312a799d44a02b54316b838bc5d89c87b4
- SHA512 a3ddf0f4ae071755e917dcd73b68469fbc273f4765878c1fb2ed38c6526671bbf458fc52b522e1eb26a9beb41263f9de980c3fde1b78f6f796e84dc5d7a9e7f7
- TLSH T1B1E04838B7B11CE53D894A7C1A9F70D56BC37565442D6E82F1DE6434554F30BE650A30
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.l6fOo3
- Size 257B
- SHA256 d7ddd3a53bdbd65e565433cbac24b5f3db06931f0b2503acc4b5525fdc0a2d05
- MD5 3d78d9bfd9cb511888e6b8c8a5197860
- SHA1 9066b7985eb8f952c654601e9fe30a380cc9aa9c
- SHA512 4be094feffed8e32803c6d0474e5bdd0f6057fd2871ee136693dc470992420115086ef321be7149bd58fc02a29d8394afc0fd6eb81ee6cd0ec846a5e2f311cb1
- TLSH T14CD02E3C7BA02C703D050A28069B208A6B83B469801D6E81F0DE1438520F30BA720920
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.osRRR1
- Size 214B
- SHA256 f2f85789a73d7476f0f33caecc179d92e610e82479ac1be0cfbcac07d3a08450
- MD5 ac2cfff52971b80f4e0bc678d718e709
- SHA1 ee6821b8cba3a444f0dce1ad78c792cd2f2c5662
- SHA512 9a3cd5f2e98e8225003dd25eb83f7fbedb5509ad5af88d71a1a62d2bf261ea5febd07486c70120fe777574fc2a99790482851d9b050dcba91bd40e52918fa52e
- TLSH T1CFD0223D3B702C303E050B1812AB255EAE92A0BD800DAE81F1ED2438120F34EAB60931
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.sfW8p5
- Size 300B
- SHA256 2fb0ef09b4e402c8e1699101a098640ec1b276d94c84142fec9485085f9a6a88
- MD5 ae719a4240a71e6bf3840dbe4674b43a
- SHA1 1ca0006eb80e00c7546ba8d3ec90d57eaa614d79
- SHA512 84ee407af4615242ed3ff69c503d1596a875c84aac008195132bbeae6310042b3e8b615b6be7c2ee6553ff2e07a7c47c78486a0300475ee43be99f97628382ed
- TLSH T1E7E0C23877B02CB43D454A38169B60896B83B569842D6E81F1DE2434514F30BE610930
- MD5 SHA1 SHA512 TLSH