socks5systemz | 7d69e0d82e74059115486fae5dd5ac6463c7fccd91dbbcaa9587117c7d201ddb

Resubmissions

22-04-2024 22:02

240422-1xtwbagh68 10

22-04-2024 19:25

240422-x42b7afa68 10

19-04-2024 03:02

240419-djmthsfh8w 10

Analysis

max time kernel
1792s
max time network
1782s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
22-04-2024 19:25

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General

Target

320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.exe
Size

2.0MB
MD5

7c75ba2571e91dca0ebb1319aa20da5f
SHA1

ccef5b75906891ca1e3870ee25b04b1217fab8d7
SHA256

320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d
SHA512

88231259a4f6ad9502c6ade78d8c6c6f53653b6c122894c1217fe67baf2c880522ffd855c4f5478a0b104f4ef3d00ee39cf209abb749f9ea40026179dab37a4c
SSDEEP

49152:32lHrEP4oHhGa6yGE4jz7WCp4VpO5STuxDNtS9W1Cf:mlLoHhzxGEGX2DWBxD/S9nf

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

http://erzwnet.ua/search/?q=67e28dd8395df37a1507f81b7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978ff71ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ffc19c1eb9c9e3f

http://erzwnet.ua/search/?q=67e28dd8395df37a1507f81b7c27d78406abdd88be4b12eab517aa5c96bd86ec908e44885a8bbc896c58e713bc90c91936b5281fc235a925ed3e5cd6bd974a95129070b616e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee96923ac9669212

Signatures

Detect Socks5Systemz Payload 5 IoCs

Processes:

resource	yara_rule
behavioral27/memory/4520-66-0x0000000000990000-0x0000000000A32000-memory.dmp	family_socks5systemz
behavioral27/memory/4520-70-0x0000000000990000-0x0000000000A32000-memory.dmp	family_socks5systemz
behavioral27/memory/4520-79-0x0000000000990000-0x0000000000A32000-memory.dmp	family_socks5systemz
behavioral27/memory/4520-92-0x0000000000990000-0x0000000000A32000-memory.dmp	family_socks5systemz
behavioral27/memory/4520-93-0x0000000000990000-0x0000000000A32000-memory.dmp	family_socks5systemz

Socks5Systemz
Socks5Systemz is a botnet written in C++.
botnet socks5systemz
Executes dropped EXE 3 IoCs

Processes:

320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmpfsound32.exefsound32.exe

pid process

1016 320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp
4488 fsound32.exe
4520 fsound32.exe
Loads dropped DLL 1 IoCs

Processes:

320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp

pid process

1016 320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp
Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.

Processes:

description ioc

Destination IP 91.211.247.248
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

pid	process
1016	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp
4488	fsound32.exe
4520	fsound32.exe

pid	process
1016	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp

description	ioc
Destination IP	91.211.247.248

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.exe320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp

description	pid	process	target process
PID 440 wrote to memory of 1016	440	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.exe	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp
PID 440 wrote to memory of 1016	440	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.exe	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp
PID 440 wrote to memory of 1016	440	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.exe	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp
PID 1016 wrote to memory of 4488	1016	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp	fsound32.exe
PID 1016 wrote to memory of 4488	1016	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp	fsound32.exe
PID 1016 wrote to memory of 4488	1016	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp	fsound32.exe
PID 1016 wrote to memory of 4520	1016	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp	fsound32.exe
PID 1016 wrote to memory of 4520	1016	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp	fsound32.exe
PID 1016 wrote to memory of 4520	1016	320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp	fsound32.exe

C:\Users\Admin\AppData\Local\Temp\320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.exe
"C:\Users\Admin\AppData\Local\Temp\320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:440
- C:\Users\Admin\AppData\Local\Temp\is-8OLLF.tmp\320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8OLLF.tmp\320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp" /SL5="$A0064,1725873,54272,C:\Users\Admin\AppData\Local\Temp\320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1016
- - C:\Users\Admin\AppData\Local\Focus Sound\fsound32.exe
    "C:\Users\Admin\AppData\Local\Focus Sound\fsound32.exe" -i
    3⤵
    - Executes dropped EXE
    PID:4488
- - C:\Users\Admin\AppData\Local\Focus Sound\fsound32.exe
    "C:\Users\Admin\AppData\Local\Focus Sound\fsound32.exe" -s
    3⤵
    - Executes dropped EXE
    PID:4520

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Focus Sound\fsound32.exe

Filesize
2.1MB

MD5
aa46c30ea175016297fd9c134db7c69e

SHA1
1512b9287dfe11f525c305ed76e1b70fec06ece3

SHA256
58ea457a93b5638ece48151ab1d7dac75bf15ba3be90b27fe2b0d1eb489e4854

SHA512
5afd62eab0f4f89d8865d3dbdc03999c99386fe35259a0116f2e451f4879cbf49ad0f74b0a3b558dcefdcf4cf18178626bc872847af3843cb731f26168911f58

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8OLLF.tmp\320ccae2e9ae546c56193c24cb12cc54f29a872c08856cc143294dd2cf8a170d.tmp

Filesize
677KB

MD5
2d1bfe3d315b8ea8191a690428416698

SHA1
8150716622169b6945e1420649716dc70fce50c7

SHA256
9b13f7be0e6d0cdf794650a7caaf1b516f2748d3d05a351a5f366210fcff8048

SHA512
8963da6dfa9a7fbb146c323e0fb993a618b0a57254c71c7e4a5257d7c4335dde90ee4d31c1b6f38c1b62eb22c2bf8595b1e48132686787584b2d1269c2ae44c8

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LFI0M.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
memory/440-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/440-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/440-48-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1016-49-0x0000000000400000-0x00000000004B8000-memory.dmp

Filesize
736KB

Download
memory/1016-7-0x0000000000650000-0x0000000000651000-memory.dmp

Filesize
4KB

Download
memory/1016-51-0x0000000000650000-0x0000000000651000-memory.dmp

Filesize
4KB

Download
memory/4488-38-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4488-42-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4488-39-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-61-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-79-0x0000000000990000-0x0000000000A32000-memory.dmp

Filesize
648KB

Download
memory/4520-47-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-53-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-55-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-58-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-46-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-64-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-66-0x0000000000990000-0x0000000000A32000-memory.dmp

Filesize
648KB

Download
memory/4520-69-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-70-0x0000000000990000-0x0000000000A32000-memory.dmp

Filesize
648KB

Download
memory/4520-75-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-78-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-50-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-82-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-85-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-88-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-91-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-92-0x0000000000990000-0x0000000000A32000-memory.dmp

Filesize
648KB

Download
memory/4520-93-0x0000000000990000-0x0000000000A32000-memory.dmp

Filesize
648KB

Download
memory/4520-97-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-100-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-103-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-106-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-109-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/4520-112-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download