Analysis Overview
SHA256
dae7c68a3605b6df65e83e1e53f7ac0a85b85220e8ebb075e5a25a7ca8ebcc22
Threat Level: Known bad
The file 6dbfddc3991121ab2232a0d6f775f453 was found to be: Known bad.
Malicious Activity Summary
MrBlack trojan
Mrblack family
MrBlack Trojan
Executes dropped EXE
Reads system routing table
Write file to user bin folder
Checks CPU configuration
Modifies init.d
Writes file to system bin folder
Reads system network configuration
Reads runtime system information
Writes file to tmp directory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-22 05:03
Signatures
MrBlack trojan
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Mrblack family
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-22 05:03
Reported
2023-12-23 10:14
Platform
ubuntu1804-amd64-20231215-en
Max time kernel
150s
Max time network
153s
Command Line
Signatures
MrBlack Trojan
MrBlack trojan
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | /usr/bin/bsd-port/getty | /usr/bin/bsd-port/getty | N/A |
| N/A | /usr/bin/.sshd | /usr/bin/.sshd | N/A |
Checks CPU configuration
| Description | Indicator | Process | Target |
| File opened for reading | /proc/cpuinfo | N/A | N/A |
Modifies init.d
| Description | Indicator | Process | Target |
| File opened for modification | /etc/init.d/DbSecuritySpt | N/A | N/A |
| File opened for modification | /etc/init.d/selinux | N/A | N/A |
Reads system routing table
| Description | Indicator | Process | Target |
| File opened for reading | /proc/net/route | N/A | N/A |
Write file to user bin folder
| Description | Indicator | Process | Target |
| File opened for modification | /usr/bin/dpkgd/ss | /bin/cp | N/A |
| File opened for modification | /usr/bin/dpkgd/lsof | /bin/cp | N/A |
| File opened for modification | /usr/bin/lsof | /bin/cp | N/A |
| File opened for modification | /usr/bin/bsd-port/getty.lock | N/A | N/A |
| File opened for modification | /usr/bin/bsd-port/udevd.lock | N/A | N/A |
| File opened for modification | /usr/bin/bsd-port/getty | /bin/cp | N/A |
| File opened for modification | /usr/bin/.sshd | /bin/cp | N/A |
| File opened for modification | /usr/bin/dpkgd/ps | /bin/cp | N/A |
Writes file to system bin folder
| Description | Indicator | Process | Target |
| File opened for modification | /bin/ps | /bin/cp | N/A |
| File opened for modification | /bin/ss | /bin/cp | N/A |
Reads system network configuration
| Description | Indicator | Process | Target |
| File opened for reading | /proc/net/dev | N/A | N/A |
| File opened for reading | /proc/net/route | N/A | N/A |
| File opened for reading | /proc/net/arp | N/A | N/A |
Reads runtime system information
| Description | Indicator | Process | Target |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/cp | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/cmdline | /sbin/insmod | N/A |
| File opened for reading | /proc/filesystems | /bin/cp | N/A |
| File opened for reading | /proc/filesystems | /bin/cp | N/A |
| File opened for reading | /proc/filesystems | /bin/cp | N/A |
| File opened for reading | /proc/filesystems | /bin/cp | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/cp | N/A |
| File opened for reading | /proc/stat | N/A | N/A |
| File opened for reading | /proc/meminfo | N/A | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/cp | N/A |
| File opened for reading | /proc/cmdline | /sbin/insmod | N/A |
| File opened for reading | /proc/filesystems | /bin/cp | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
| File opened for reading | /proc/filesystems | /bin/mkdir | N/A |
Writes file to tmp directory
| Description | Indicator | Process | Target |
| File opened for modification | /tmp/notify.file | N/A | N/A |
| File opened for modification | /tmp/conf.n | N/A | N/A |
| File opened for modification | /tmp/moni.lod | N/A | N/A |
| File opened for modification | /tmp/bill.lock | N/A | N/A |
| File opened for modification | /tmp/gates.lod | N/A | N/A |
Processes
/tmp/6dbfddc3991121ab2232a0d6f775f453
[/tmp/6dbfddc3991121ab2232a0d6f775f453]
/bin/sh
[sh -c ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt]
/bin/ln
[ln -s /etc/init.d/DbSecuritySpt /etc/rc1.d/S97DbSecuritySpt]
/bin/sh
[sh -c ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt]
/bin/ln
[ln -s /etc/init.d/DbSecuritySpt /etc/rc2.d/S97DbSecuritySpt]
/bin/sh
[sh -c ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt]
/bin/ln
[ln -s /etc/init.d/DbSecuritySpt /etc/rc3.d/S97DbSecuritySpt]
/bin/sh
[sh -c ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt]
/bin/ln
[ln -s /etc/init.d/DbSecuritySpt /etc/rc4.d/S97DbSecuritySpt]
/bin/sh
[sh -c ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt]
/bin/ln
[ln -s /etc/init.d/DbSecuritySpt /etc/rc5.d/S97DbSecuritySpt]
/bin/sh
[sh -c mkdir -p /usr/bin/bsd-port]
/bin/mkdir
[mkdir -p /usr/bin/bsd-port]
/bin/sh
[sh -c mkdir -p /usr/bin/bsd-port]
/bin/mkdir
[mkdir -p /usr/bin/bsd-port]
/bin/sh
[sh -c cp -f /tmp/6dbfddc3991121ab2232a0d6f775f453 /usr/bin/bsd-port/getty]
/bin/cp
[cp -f /tmp/6dbfddc3991121ab2232a0d6f775f453 /usr/bin/bsd-port/getty]
/bin/sh
[sh -c /usr/bin/bsd-port/getty]
/usr/bin/bsd-port/getty
[/usr/bin/bsd-port/getty]
/bin/sh
[sh -c mkdir -p /usr/bin]
/bin/mkdir
[mkdir -p /usr/bin]
/bin/sh
[sh -c mkdir -p /usr/bin]
/bin/mkdir
[mkdir -p /usr/bin]
/bin/sh
[sh -c cp -f /tmp/6dbfddc3991121ab2232a0d6f775f453 /usr/bin/.sshd]
/bin/cp
[cp -f /tmp/6dbfddc3991121ab2232a0d6f775f453 /usr/bin/.sshd]
/bin/sh
[sh -c ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux]
/bin/ln
[ln -s /etc/init.d/selinux /etc/rc1.d/S99selinux]
/bin/sh
[sh -c ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux]
/bin/ln
[ln -s /etc/init.d/selinux /etc/rc2.d/S99selinux]
/bin/sh
[sh -c ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux]
/bin/ln
[ln -s /etc/init.d/selinux /etc/rc3.d/S99selinux]
/bin/sh
[sh -c ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux]
/bin/ln
[ln -s /etc/init.d/selinux /etc/rc4.d/S99selinux]
/bin/sh
[sh -c ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux]
/bin/ln
[ln -s /etc/init.d/selinux /etc/rc5.d/S99selinux]
/bin/sh
[sh -c mkdir -p /usr/bin/dpkgd]
/bin/mkdir
[mkdir -p /usr/bin/dpkgd]
/bin/sh
[sh -c cp -f /bin/ps /usr/bin/dpkgd/ps]
/bin/cp
[cp -f /bin/ps /usr/bin/dpkgd/ps]
/bin/sh
[sh -c mkdir -p /bin]
/bin/mkdir
[mkdir -p /bin]
/bin/sh
[sh -c mkdir -p /bin]
/bin/mkdir
[mkdir -p /bin]
/bin/sh
[sh -c cp -f /usr/bin/bsd-port/getty /bin/ps]
/bin/cp
[cp -f /usr/bin/bsd-port/getty /bin/ps]
/bin/sh
[sh -c chmod 0755 /bin/ps]
/bin/chmod
[chmod 0755 /bin/ps]
/bin/sh
[sh -c cp -f /bin/ss /usr/bin/dpkgd/ss]
/bin/cp
[cp -f /bin/ss /usr/bin/dpkgd/ss]
/bin/sh
[sh -c mkdir -p /bin]
/bin/mkdir
[mkdir -p /bin]
/bin/sh
[sh -c mkdir -p /bin]
/bin/mkdir
[mkdir -p /bin]
/bin/sh
[sh -c cp -f /usr/bin/bsd-port/getty /bin/ss]
/bin/cp
[cp -f /usr/bin/bsd-port/getty /bin/ss]
/bin/sh
[sh -c chmod 0755 /bin/ss]
/bin/chmod
[chmod 0755 /bin/ss]
/bin/sh
[sh -c cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof]
/bin/cp
[cp -f /usr/bin/lsof /usr/bin/dpkgd/lsof]
/bin/sh
[sh -c mkdir -p /usr/bin]
/bin/mkdir
[mkdir -p /usr/bin]
/bin/sh
[sh -c mkdir -p /usr/bin]
/bin/mkdir
[mkdir -p /usr/bin]
/bin/sh
[sh -c cp -f /usr/bin/bsd-port/getty /usr/bin/lsof]
/bin/cp
[cp -f /usr/bin/bsd-port/getty /usr/bin/lsof]
/bin/sh
[sh -c chmod 0755 /usr/bin/lsof]
/bin/chmod
[chmod 0755 /usr/bin/lsof]
/bin/sh
[sh -c /usr/bin/.sshd]
/usr/bin/.sshd
[/usr/bin/.sshd]
/bin/sh
[sh -c insmod /usr/bin/bsd-port/xpacket.ko]
/sbin/insmod
[insmod /usr/bin/bsd-port/xpacket.ko]
/bin/sh
[sh -c insmod /tmp/xpacket.ko]
/sbin/insmod
[insmod /tmp/xpacket.ko]
Network
| Country | Destination | Domain | Proto |
| N/A | 224.0.0.251:5353 | udp | |
| US | 151.101.130.49:443 | tcp | |
| US | 151.101.193.91:443 | tcp | |
| GB | 89.187.167.4:443 | tcp | |
| US | 1.1.1.1:53 | cdn.fwupd.org | udp |
| US | 1.1.1.1:53 | cdn.fwupd.org | udp |
| US | 151.101.194.49:443 | cdn.fwupd.org | tcp |
| GB | 185.125.188.61:443 | tcp | |
| GB | 185.125.188.61:443 | tcp | |
| US | 151.101.193.91:443 | tcp | |
| US | 1.1.1.1:53 | www.2xpk.com | udp |
| US | 1.1.1.1:53 | 1527653184.rsc.cdn77.org | udp |
| US | 1.1.1.1:53 | 1527653184.rsc.cdn77.org | udp |
| GB | 195.181.164.16:443 | 1527653184.rsc.cdn77.org | tcp |
| CN | 58.221.42.45:26000 | tcp | |
| CN | 58.221.42.45:26000 | tcp |
Files
/tmp/gates.lod
| MD5 | 3a20f62a0af1aa152670bab3c602feed |
| SHA1 | 062dd0f773cd5999a09714a371e1f8017163e2a1 |
| SHA256 | c649b15e769148e6b199b7a671140d60c77847fce6fe17277723dc91f0b27d4c |
| SHA512 | 419f66b1afde60779300c3cb662c238c1bfad252c9db934512fa5af99f598c27dffdb1b3514fc254dc947a0080a0484a84ff12ed9aae5ca491091fec39989b86 |
/etc/init.d/DbSecuritySpt
| MD5 | 7bc3e375a8c71dd59894cdddb91e2c50 |
| SHA1 | 185d8ae77f03be110a694e6cfa57b35402552db3 |
| SHA256 | 75e723379f40e0072bb8e3da0cd4cb46d225751ea8028a818e34c78c44903b2e |
| SHA512 | 08f8015b103692be600971eef1ea4036aaf121abdf9801620904784f0b2364104a7fd48e3fff2ae2972d81ceeaba781a435bef777722d94f309b4f6229e987fc |
/usr/bin/bsd-port/getty
| MD5 | 6dbfddc3991121ab2232a0d6f775f453 |
| SHA1 | 6833bbfa03d75146f1a5182212c2674157796679 |
| SHA256 | dae7c68a3605b6df65e83e1e53f7ac0a85b85220e8ebb075e5a25a7ca8ebcc22 |
| SHA512 | 288a6d22e441ceda288ff0391cd87244b313ac2df68f0b76290147fdb54e31a78704a25745e1de05265b16932df79e276fac719b0300f68684da6a90bd78be6c |
/tmp/notify.file
| MD5 | 6af73f576e49c754a91a2a4c81fdfe28 |
| SHA1 | 0dc9cfbe14f6e089146f43d70dc229f1142b3eae |
| SHA256 | c97d3ddf7400caebf246e8b99af802d8b90f5331ff6460416efb3ab0248e7a0b |
| SHA512 | 0f9939e017202de5e265daf8292bdaf75fbca30ea9bbce1de7b90819039bfda85a44d81895c07dbec34d994c50738cd9f2e25d50fb47dd2e4f00bbde5df5d680 |
/usr/bin/dpkgd/ps
| MD5 | 558edc26f8a38fa9788220b9af8a73e7 |
| SHA1 | 3024d44e580e9c67f32f6c585d50e2a6cc9a7cac |
| SHA256 | b76435c80333d2c1fd18e0e7682f1c9dfb5da8d507e93e3c416f54b481c428d5 |
| SHA512 | edaa425b441044f015e8f68fffa1664e42372d00dd0e7b0924d24ce947aa8e5f96b3bdc326fa2f8b978e3fcf638a1ceca45a223735db73f1607df66990feb56f |
/usr/bin/dpkgd/ss
| MD5 | 1dc929b5f2cd12fe6a2fe71140d2a9e3 |
| SHA1 | f9995a92bb201b1b7738a39a38570ef0c40b52d2 |
| SHA256 | 418aae1da62554afe9f260866267af328fd761b3fd6f90f0ea53d543e2fefc38 |
| SHA512 | fbed011c595084548db440dfbe485b7d27032a44a6ae9e141fe43f31c8c524ff9347135ab035deb441fca99e5a3794f7bb9194f148aa2f60f1547a7c67d47373 |
/usr/bin/dpkgd/lsof
| MD5 | e093dc78225e2a0a25e3b137c1c1e442 |
| SHA1 | c29497cfaae729eb576875e4fdfa400640ab16be |
| SHA256 | 1190f4dbc7be174de8fd4096c9bf7a28eebfac937d308b7cc533be4a1240d26e |
| SHA512 | fe1cc7a65327732eaaee89f427c10239ba822430e34177842f4681068d78d404b1830d808a2a71b1efcc5f126c6d8c053512237421173aaa150e215a672da6f0 |
/tmp/moni.lod
| MD5 | c1fea270c48e8079d8ddf7d06d26ab52 |
| SHA1 | 637250c78dd38a4e6c7e05c62f9ff2e960a977a0 |
| SHA256 | 7e5cb8429dce239403fec15b8930529f51efdf34ce3e28548977ea97e152f303 |
| SHA512 | 30b6282fe8e42efd00e6b26bf7233375015a9051553b1f0c5e465910de8683680615675a3e24f43ce349baf54564c70b385bb70ea9546150f2fc675a19f0f33a |