socks5systemz | a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4

General

Target

a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.exe
Size

5.2MB
MD5

c1cc6000c6eaf1fe6347124647ab3ab5
SHA1

9925f96090c97b327bd3a63524545ed030e465d4
SHA256

a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4
SHA512

faa0c38cbcb742b89355c12a313e9a733beb2c18eca644283370444f708f1cceec2bf645fd7b48daad8f338121bbd1801294ddfb303d87dc8fc04239005983eb
SSDEEP

98304:C82GBZjmMpd1bTRYeUY4h4JydTLhr7lQShe2NXSAZ+2gcspFc7W5io6wG5f4:gqtd1HRYeU2JETtr7lW2NXSmngcUO7qD

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

bobcgdl.com

http://bobcgdl.com/search/?q=67e28dd86b5bf57d470baa197c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa49e8889b5e4fa9281ae978ff71ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608afd13c8ef9c9c39

http://bobcgdl.com/search/?q=67e28dd86b5bf57d470baa197c27d78406abdd88be4b12eab517aa5c96bd86ec9c8145825a8bbc896c58e713bc90c91c36b5281fc235a925ed3e5cd6bd974a95129070b616e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7eb979833cd669014

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral2/memory/5468-74-0x0000000000A20000-0x0000000000AC2000-memory.dmp	family_socks5systemz
behavioral2/memory/5468-97-0x0000000000A20000-0x0000000000AC2000-memory.dmp	family_socks5systemz
behavioral2/memory/5468-98-0x0000000000A20000-0x0000000000AC2000-memory.dmp	family_socks5systemz

Socks5Systemz
Socks5Systemz is a botnet written in C++.
botnet socks5systemz
Socks5systemz family
socks5systemz

Executes dropped EXE 3 IoCs

pid	Process
2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp
2136	pmediaserver.exe
5468	pmediaserver.exe

Loads dropped DLL 3 IoCs

pid	Process
2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp
2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp
2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.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	flow	ioc	pid	Process
Destination IP	45	45.155.250.90	5468	pmediaserver.exe

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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pmediaserver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pmediaserver.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4248 wrote to memory of 2752	4248	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.exe	86
PID 4248 wrote to memory of 2752	4248	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.exe	86
PID 4248 wrote to memory of 2752	4248	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.exe	86
PID 2752 wrote to memory of 2136	2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp	89
PID 2752 wrote to memory of 2136	2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp	89
PID 2752 wrote to memory of 2136	2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp	89
PID 2752 wrote to memory of 5468	2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp	90
PID 2752 wrote to memory of 5468	2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp	90
PID 2752 wrote to memory of 5468	2752	a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp	90

C:\Users\Admin\AppData\Local\Temp\a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.exe
"C:\Users\Admin\AppData\Local\Temp\a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4248
- C:\Users\Admin\AppData\Local\Temp\is-UD3NA.tmp\a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-UD3NA.tmp\a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp" /SL5="$70274,5099094,54272,C:\Users\Admin\AppData\Local\Temp\a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\Users\Admin\AppData\Local\Pleenator Media Server\pmediaserver.exe
    "C:\Users\Admin\AppData\Local\Pleenator Media Server\pmediaserver.exe" -i
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2136
- - C:\Users\Admin\AppData\Local\Pleenator Media Server\pmediaserver.exe
    "C:\Users\Admin\AppData\Local\Pleenator Media Server\pmediaserver.exe" -s
    3⤵
    - Executes dropped EXE
    - Unexpected DNS network traffic destination
    - System Location Discovery: System Language Discovery
    PID:5468

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 Information Discovery

1

T1082

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\Pleenator Media Server\pmediaserver.exe

Filesize
5.2MB

MD5
f4c7470503c8f46c5054e32053428214

SHA1
6cc6f0cf72efc1926b515b3deb515e557afe299c

SHA256
072a1edd6ea32e0e76b0c712f1fd2f10656bb2a6c3764299105dfcb8928ffd40

SHA512
215d56071826070d1ff4e3d8c3ae73893df5d691bb35c5301869bce91e3dc6ed64e7e25a1798d0ce170664a15f2a1663ddc1efa6f0efa11844a425f3f3d45c3d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-A8429.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-A8429.tmp\_isetup\_isdecmp.dll

Filesize
13KB

MD5
a813d18268affd4763dde940246dc7e5

SHA1
c7366e1fd925c17cc6068001bd38eaef5b42852f

SHA256
e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

SHA512
b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-UD3NA.tmp\a3f5cc3d35bc13597d7d7b9776e0f0e597f00dac3e6cc4c6512cd180019294e4.tmp

Filesize
680KB

MD5
78276d2aa5e45234705be62759f5d189

SHA1
ab59864f65055560ba43944e193fab202ca55290

SHA256
929d99810dc5edc5cc6e73ad47b15a58d1cff38baf96dda5a5f0975dd3db55af

SHA512
f3c03a032325a7b4263f7e27846347baf7d3ee3f2eccbfe68580d82f933e9c8ad3a1135d1a63bb09a33cbffeff53826030593092fe688b7907818b997a83b6f9

Download Submit
memory/2136-51-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2136-45-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2136-46-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2136-50-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/2752-7-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2752-55-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/4248-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/4248-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4248-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5468-68-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-87-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-59-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-62-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-65-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-54-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-71-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-74-0x0000000000A20000-0x0000000000AC2000-memory.dmp

Filesize
648KB

Download
memory/5468-76-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-81-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-84-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-58-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-90-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-93-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-96-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-97-0x0000000000A20000-0x0000000000AC2000-memory.dmp

Filesize
648KB

Download
memory/5468-98-0x0000000000A20000-0x0000000000AC2000-memory.dmp

Filesize
648KB

Download
memory/5468-102-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-105-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-108-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-111-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-114-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download
memory/5468-117-0x0000000000400000-0x0000000000930000-memory.dmp

Filesize
5.2MB

Download

Analysis

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