Analysis
- max time kernel
94s - 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
28/07/2026, 18:17
Behavioral task
behavioral1
Sample
pty4
Resource
ubuntu1804-amd64-20260513-en
10 signatures
150 seconds
General
- Target pty4
- Size 43KB
- Sample260728-ww3dvasblh
- 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/1475-1-0x0000000008048000-0x0000000008061864-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.MjBKRA crontab File opened for modification /var/spool/cron/crontabs/tmp.sSWn3c crontab File opened for modification /var/spool/cron/crontabs/tmp.imVfdo crontab File opened for modification /var/spool/cron/crontabs/tmp.iHwfNp crontab File opened for modification /var/spool/cron/crontabs/tmp.wPcbvv 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 1590 sh 1504 touch 1530 sh 1531 touch 1550 sh 1551 touch 1570 sh 1571 touch 1591 touch 1503 sh -
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 1475 pty4 -
description ioc Process File opened for reading /proc/14/cmdline pidof File opened for reading /proc/167/stat pidof File opened for reading /proc/1037/stat pidof File opened for reading /proc/1054/stat pidof File opened for reading /proc/1140/cmdline pidof File opened for reading /proc/1330/cmdline pidof File opened for reading /proc/548/stat pidof File opened for reading /proc/1006/cmdline pidof File opened for reading /proc/2/cmdline pidof File opened for reading /proc/98/cmdline pidof File opened for reading /proc/1079/cmdline pidof File opened for reading /proc/170/cmdline pidof File opened for reading /proc/442/stat pidof File opened for reading /proc/1053/stat pidof File opened for reading /proc/8/stat pidof File opened for reading /proc/20/cmdline pidof File opened for reading /proc/1075/stat pidof File opened for reading /proc/170/stat pidof File opened for reading /proc/174/cmdline pidof File opened for reading /proc/988/stat pidof File opened for reading /proc/78/stat pidof File opened for reading /proc/712/cmdline pidof File opened for reading /proc/84/stat pidof File opened for reading /proc/653/stat pidof File opened for reading /proc/656/cmdline pidof File opened for reading /proc/1476/stat pidof File opened for reading /proc/202/cmdline pidof File opened for reading /proc/470/stat pidof File opened for reading /proc/979/stat pidof File opened for reading /proc/1040/cmdline pidof File opened for reading /proc/166/stat pidof File opened for reading /proc/534/cmdline pidof File opened for reading /proc/1082/stat pidof File opened for reading /proc/89/cmdline pidof File opened for reading /proc/484/cmdline pidof File opened for reading /proc/491/stat pidof File opened for reading /proc/471/cmdline pidof File opened for reading /proc/590/cmdline pidof File opened for reading /proc/913/cmdline pidof File opened for reading /proc/1181/stat pidof File opened for reading /proc/18/cmdline pidof File opened for reading /proc/35/cmdline pidof File opened for reading /proc/163/cmdline pidof File opened for reading /proc/173/stat pidof File opened for reading /proc/167/stat pidof File opened for reading /proc/511/stat pidof File opened for reading /proc/1019/cmdline pidof File opened for reading /proc/26/cmdline pidof File opened for reading /proc/83/cmdline pidof File opened for reading /proc/891/stat pidof File opened for reading /proc/1239/cmdline pidof File opened for reading /proc/19/stat pidof File opened for reading /proc/24/cmdline pidof File opened for reading /proc/159/stat pidof File opened for reading /proc/469/stat pidof File opened for reading /proc/889/cmdline pidof File opened for reading /proc/162/stat pidof File opened for reading /proc/477/cmdline pidof File opened for reading /proc/631/stat pidof File opened for reading /proc/650/stat pidof File opened for reading /proc/442/stat pidof File opened for reading /proc/951/cmdline pidof File opened for reading /proc/975/cmdline pidof File opened for reading /proc/1002/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
-
/tmp/pty4/tmp/pty41⤵
- Changes its process name
- Writes file to tmp directory
PID:1475 -
/bin/shsh -c "pidof -x strace > /dev/null"2⤵PID:1476
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/bin/pidofpidof -x strace3⤵
- Reads runtime system information
PID:1479
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-
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/bin/shsh -c "pidof -x tcpdump > /dev/null"2⤵PID:1481
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/bin/pidofpidof -x tcpdump3⤵
- Reads runtime system information
PID:1482
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/bin/shsh -c "cat /etc/inittab | grep -v \"/tmp/pty4\" > /etc/inittab2"2⤵PID:1486
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/bin/catcat /etc/inittab3⤵PID:1489
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/bin/grepgrep -v /tmp/pty43⤵PID:1490
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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:1487
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/bin/grepgrep -v "no cron"3⤵PID:1494
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/bin/grepgrep /tmp/pty43⤵PID:1492
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/usr/bin/crontabcrontab -l3⤵PID:1491
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1497
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/usr/bin/crontabcrontab -l3⤵PID:1499
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-
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/bin/shsh -c "crontab -r"2⤵PID:1488
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/usr/bin/crontabcrontab -r3⤵PID:1493
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-
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/bin/shsh -c "echo \"0:2345:respawn:/tmp/pty4\" >> /etc/inittab2"2⤵PID:1495
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1498
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/bin/catcat /etc/inittab23⤵PID:1500
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1501
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/bin/rmrm -rf /etc/inittab23⤵PID:1502
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1503 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1504
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/bin/shsh -c "/bin/uname -n"2⤵PID:1510
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/bin/uname/bin/uname -n3⤵PID:1512
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/bin/shsh -c "cp -f /tmp/pty4 /dev/shm/pty4"2⤵PID:1511
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/bin/cpcp -f /tmp/pty4 /dev/shm/pty43⤵
- Writes file to shm directory
PID:1513
-
-
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/bin/shsh -c "cat /etc/inittab | grep -v \"/dev/shm/pty4\" > /etc/inittab2"2⤵PID:1515
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/bin/catcat /etc/inittab3⤵PID:1517
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/bin/grepgrep -v /dev/shm/pty43⤵PID:1518
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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:1516
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/usr/bin/crontabcrontab -l3⤵PID:1519
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/bin/grepgrep -v "no cron"3⤵PID:1521
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/bin/grepgrep /dev/shm/pty43⤵PID:1520
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1525
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/usr/bin/crontabcrontab -l3⤵PID:1526
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-
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/bin/shsh -c "echo \"0:2345:respawn:/dev/shm/pty4\" >> /etc/inittab2"2⤵PID:1522
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1523
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/bin/catcat /etc/inittab23⤵PID:1527
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-
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1528
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/bin/rmrm -rf /etc/inittab23⤵PID:1529
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1530 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1531
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-
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/bin/shsh -c "cp -f /tmp/pty4 /var/tmp/pty4"2⤵PID:1532
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/bin/cpcp -f /tmp/pty4 /var/tmp/pty43⤵PID:1533
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/tmp/pty4\" > /etc/inittab2"2⤵PID:1535
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/bin/grepgrep -v /var/tmp/pty43⤵PID:1537
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/bin/catcat /etc/inittab3⤵PID:1536
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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:1538
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/bin/grepgrep -v "no cron"3⤵PID:1541
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/bin/grepgrep /var/tmp/pty43⤵PID:1540
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/usr/bin/crontabcrontab -l3⤵PID:1539
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1545
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/usr/bin/crontabcrontab -l3⤵PID:1547
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/bin/shsh -c "echo \"0:2345:respawn:/var/tmp/pty4\" >> /etc/inittab2"2⤵PID:1542
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1543
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/bin/catcat /etc/inittab23⤵PID:1546
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-
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1548
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/bin/rmrm -rf /etc/inittab23⤵PID:1549
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1550 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1551
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/bin/shsh -c "cp -f /tmp/pty4 /var/lock/pty4"2⤵PID:1552
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/bin/cpcp -f /tmp/pty4 /var/lock/pty43⤵PID:1553
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/lock/pty4\" > /etc/inittab2"2⤵PID:1555
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/bin/grepgrep -v /var/lock/pty43⤵PID:1557
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/bin/catcat /etc/inittab3⤵PID:1556
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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:1558
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/bin/grepgrep -v "no cron"3⤵PID:1561
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/bin/grepgrep /var/lock/pty43⤵PID:1560
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/usr/bin/crontabcrontab -l3⤵PID:1559
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1565
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/usr/bin/crontabcrontab -l3⤵PID:1567
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/bin/shsh -c "echo \"0:2345:respawn:/var/lock/pty4\" >> /etc/inittab2"2⤵PID:1562
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1563
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/bin/catcat /etc/inittab23⤵PID:1566
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-
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1568
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/bin/rmrm -rf /etc/inittab23⤵PID:1569
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-
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1570 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1571
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/bin/shsh -c "cp -f /tmp/pty4 /var/run/pty4"2⤵PID:1572
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/bin/cpcp -f /tmp/pty4 /var/run/pty43⤵PID:1573
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/bin/shsh -c "cat /etc/inittab | grep -v \"/var/run/pty4\" > /etc/inittab2"2⤵PID:1575
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/bin/catcat /etc/inittab3⤵PID:1577
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/bin/grepgrep -v /var/run/pty43⤵PID:1578
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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:1576
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/bin/grepgrep -v "no cron"3⤵PID:1581
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/usr/bin/crontabcrontab -l3⤵PID:1579
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/bin/grepgrep /var/run/pty43⤵PID:1580
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/usr/bin/crontabcrontab -3⤵
- Creates/modifies Cron job
PID:1585
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/usr/bin/crontabcrontab -l3⤵PID:1587
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/bin/shsh -c "echo \"0:2345:respawn:/var/run/pty4\" >> /etc/inittab2"2⤵PID:1582
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/bin/shsh -c "cat /etc/inittab2 > /etc/inittab"2⤵PID:1583
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/bin/catcat /etc/inittab23⤵PID:1586
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/bin/shsh -c "rm -rf /etc/inittab2"2⤵PID:1588
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/bin/rmrm -rf /etc/inittab23⤵PID:1589
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/bin/shsh -c "touch -acmr /bin/ls /etc/inittab"2⤵
- Indicator Removal: Timestomp
PID:1590 -
/usr/bin/touchtouch -acmr /bin/ls /etc/inittab3⤵
- Indicator Removal: Timestomp
PID:1591
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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.MjBKRA
- Size 387B
- SHA256 7490c8f5407f319b1a8bbb5ef4fe9571e574526f400e82010d41dbe3898ae4e9
- MD5 fcf038f4524fbce82308f7d5c08411be
- SHA1 46250ef133fec44f89429a3098349c312f08257b
- SHA512 6ee11a8699879df23fc62dd09d2e954b8467021247b218ff6016b57dc4dd060035a61433a6bdc5ab7d5c9dc81c29bae9d9478865952c9ccfb27daf882dd7039f
- TLSH T128E01238B7711CE539894A781AAF60952BC37565452D6E42F1CE6470554E30BA640A71
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.iHwfNp
- Size 300B
- SHA256 7ddf9f2e168a157954e4dadf329365fb47e2eb57a7f90add311c349849d6cf3c
- MD5 b41a7cd074bf2bd8ed1f7062791e2f1f
- SHA1 9d4fe233c814b5465a8745d0342d3a26c6b19729
- SHA512 e68fdb89aee42dcd82209558071ddfdb3ffd0e886ae3abf935347c3dbe48865ba74ec07ae99f6df0f8666b8e0e141d57f2d7ae45dddb9d84577627edbfa00d88
- TLSH T1B8E0C238BB702CE039854A3816AB60852B83B579852DAE42F1CE1430514E30FF700A31
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.imVfdo
- Size 257B
- SHA256 2a54bcca14f7bf9ef25f0cee0d28207947261c122bc1a3001f946d1760ed48e6
- MD5 11f5dc1ba578c776673eeb3b6acd3079
- SHA1 35613937172394754d517077d91c3ef69396b6fa
- SHA512 627cc16b1a0e606ef582c160ec64b654b708c7a9a6adfc001d1dbe4cb06e853f054c0420a2689cf1db2c3ad542e34a1696f7c751b1e9259824e42fc7f6223086
- TLSH T1DED0973CBB702CB039450B3806AB20893B83B4B9812DAF42F0CE0430410E30FF700A31
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.sSWn3c
- Size 214B
- SHA256 8734e510f129fdab0468192c8373d07dc15ef6e91a233b46c71ed03d2a8b4a82
- MD5 4661cd7b6a18540573f46ec2df92ba65
- SHA1 6d4305d1f73372c4519022595db8587668bf88af
- SHA512 2e7014f260a7305675f611291fbebfaf93ea2f0da59c7b21e9f2d98682d864876542f8455e966eb04d84dae7a12b99fd432c5790be49ecc1ca530b09019c285c
- TLSH T108D0223C7F302C707A850B1812AB11596A82A0BD821DEE42E1DE0424020E34EBB40A72
- MD5 SHA1 SHA512 TLSH
- Path /var/spool/cron/crontabs/tmp.wPcbvv
- Size 344B
- SHA256 93989a058d377d680a2ee2fe3432f8e4913ba24e0da6bb2a72ad3f2be68ee9ff
- MD5 f2364884e44913becafb72c34e9b2974
- SHA1 e08f3c35171ef76062da840f4bebd178f9475aee
- SHA512 070688ab4b813bf496d6a276837124c8abeb782585522a1ea3c7441452b875fd320269eb7bece07a4df39b53b45c4f46197924911554e0fd120fc1a22624b5ba
- TLSH T143E08638BB701CE539894A781AAF60952BC37575452D6E42F1CE5470514E30FF640A71
- MD5 SHA1 SHA512 TLSH