socks5systemz | 0b0bbb98c9fab6db2e8c2e3a09f2f6ee998b73894c77fd17cdce2757024e0455

General

Target

crt.exe
Size

4.0MB
MD5

d84d2af260f9d7114fa67cda49af1d27
SHA1

7077ad2e5b59f20978ac6fa9f6c561cc6275ceec
SHA256

0b0bbb98c9fab6db2e8c2e3a09f2f6ee998b73894c77fd17cdce2757024e0455
SHA512

a5b831f4e669b88d8ea8426581442a7c2bf8f9e1da8f9745015905569f258afc1370b8f17007003df381e7200c9779c32ab032b2b72cc10f1708747b9bc4213d
SSDEEP

49152:1vMdC1TH2IIGt6oPwe0tYYE1B1eoFlYDlGdNT696uvwBVqkzE/inX8rsnf7vGYM+:NsCtHPIQosrYDl2NT6suqS4CYNZA/QdX

Score

10^/10

Malware Config

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral3/memory/2916-83-0x0000000000A10000-0x0000000000AB2000-memory.dmp	family_socks5systemz
behavioral3/memory/2916-113-0x0000000000A10000-0x0000000000AB2000-memory.dmp	family_socks5systemz
behavioral3/memory/2916-112-0x0000000000A10000-0x0000000000AB2000-memory.dmp	family_socks5systemz

Socks5Systemz
Socks5Systemz is a botnet written in C++.
botnet socks5systemz

Executes dropped EXE 3 IoCs

pid	Process
100	crt.tmp
2920	xulplayer32_64.exe
2916	xulplayer32_64.exe

Loads dropped DLL 3 IoCs

pid	Process
100	crt.tmp
100	crt.tmp
100	crt.tmp

Unexpected DNS network traffic destination 1 IoCs

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

description	ioc
Destination IP	152.89.198.214

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	crt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	crt.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xulplayer32_64.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xulplayer32_64.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
100	crt.tmp
100	crt.tmp

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
100	crt.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1436 wrote to memory of 100	1436	crt.exe	85
PID 1436 wrote to memory of 100	1436	crt.exe	85
PID 1436 wrote to memory of 100	1436	crt.exe	85
PID 100 wrote to memory of 2920	100	crt.tmp	88
PID 100 wrote to memory of 2920	100	crt.tmp	88
PID 100 wrote to memory of 2920	100	crt.tmp	88
PID 100 wrote to memory of 2916	100	crt.tmp	89
PID 100 wrote to memory of 2916	100	crt.tmp	89
PID 100 wrote to memory of 2916	100	crt.tmp	89

C:\Users\Admin\AppData\Local\Temp\crt.exe
"C:\Users\Admin\AppData\Local\Temp\crt.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1436
- C:\Users\Admin\AppData\Local\Temp\is-LKCN2.tmp\crt.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-LKCN2.tmp\crt.tmp" /SL5="$50274,3880008,54272,C:\Users\Admin\AppData\Local\Temp\crt.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:100
- - C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe
    "C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe" -i
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2920
- - C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe
    "C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe" -s
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\is-HHH63.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-HHH63.tmp\_isetup\_isdecmp.dll

Filesize
13KB

MD5
a813d18268affd4763dde940246dc7e5

SHA1
c7366e1fd925c17cc6068001bd38eaef5b42852f

SHA256
e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

SHA512
b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LKCN2.tmp\crt.tmp

Filesize
692KB

MD5
00f15ee57af82fc40ac1ec609d1810a4

SHA1
6abfae4f73ade5af54d267c02389daf49abd6a51

SHA256
20fea1e5fc629afb3a4f3aa818e7c00c66b692e2d6180c7ba64a246fd9d5d847

SHA512
f9ab66c722b37cdb96f1a547a2c2d1c870b4966f27fee269bf65d47a506c2fcb0eab1ac168d0b4246ec336b23694d3c675d5be48f3338b79b76407c31cdad24c

Download Submit
C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe

Filesize
3.3MB

MD5
0ce21a5f4358ff7d673e423c229b6ef5

SHA1
4244e89af3f2aa98dd5ea6fd70d8704b29f9b1c5

SHA256
950eb214c8aaa1aef01266126441cb55ab8216bf0989778f2f1973af02ead85b

SHA512
af2665c210c9b0e11dc25cd4c05c4255e9f2195756bdb060e9ed3ea0065600114cdf09f165127bc9d52ee489b2eea2c52a67d8c0679eb9eb4e36fa359e467f95

Download Submit
memory/100-19-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/100-67-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/1436-66-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1436-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/1436-1-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2916-93-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-90-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-112-0x0000000000A10000-0x0000000000AB2000-memory.dmp

Filesize
648KB

Download
memory/2916-113-0x0000000000A10000-0x0000000000AB2000-memory.dmp

Filesize
648KB

Download
memory/2916-68-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-71-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-74-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-77-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-80-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-83-0x0000000000A10000-0x0000000000AB2000-memory.dmp

Filesize
648KB

Download
memory/2916-85-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-111-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-108-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-96-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-99-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-102-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2916-105-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2920-59-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2920-62-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2920-58-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download
memory/2920-63-0x0000000000400000-0x000000000074A000-memory.dmp

Filesize
3.3MB

Download

Analysis

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