socks5systemz | dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f

General

Target

dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.exe
Size

5.7MB
MD5

da702a3afe8c859d6b6a6e375d50443d
SHA1

4636460e13df41c1d19a16bbbcbe402b426bc843
SHA256

dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f
SHA512

e2d090e0d2e97c98020f97dd1085923f31f7da7807d57be2ba170792002cc9f57876466e7b2c562739492c2a6f92c13e196674dfcac8414af215b5fc2756cebb
SSDEEP

98304:CWzGKJdcrlEdywyyT0X7RpUIIbxi+xfYmEsbbKRC03/ToLOBuHwbDrx2O817vCRM:XdcrlEdywNU2/bxlYxGKRC03/5kHwPEB

Score

10^/10

Malware Config

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral1/memory/3000-86-0x0000000000990000-0x0000000000A32000-memory.dmp	family_socks5systemz
behavioral1/memory/3000-109-0x0000000000990000-0x0000000000A32000-memory.dmp	family_socks5systemz
behavioral1/memory/3000-110-0x0000000000990000-0x0000000000A32000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp
2148	bcodecpack.exe
3000	bcodecpack.exe

Loads dropped DLL 1 IoCs

pid	Process
4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.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	141.98.234.31

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

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 4740	4844	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.exe	84
PID 4844 wrote to memory of 4740	4844	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.exe	84
PID 4844 wrote to memory of 4740	4844	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.exe	84
PID 4740 wrote to memory of 2148	4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp	88
PID 4740 wrote to memory of 2148	4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp	88
PID 4740 wrote to memory of 2148	4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp	88
PID 4740 wrote to memory of 3000	4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp	89
PID 4740 wrote to memory of 3000	4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp	89
PID 4740 wrote to memory of 3000	4740	dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp	89

C:\Users\Admin\AppData\Local\Temp\dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.exe
"C:\Users\Admin\AppData\Local\Temp\dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Users\Admin\AppData\Local\Temp\is-G3VG7.tmp\dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-G3VG7.tmp\dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp" /SL5="$12015C,5769847,54272,C:\Users\Admin\AppData\Local\Temp\dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:4740
- - C:\Users\Admin\AppData\Local\B-Codec Pack\bcodecpack.exe
    "C:\Users\Admin\AppData\Local\B-Codec Pack\bcodecpack.exe" -i
    3⤵
    - Executes dropped EXE
    PID:2148
- - C:\Users\Admin\AppData\Local\B-Codec Pack\bcodecpack.exe
    "C:\Users\Admin\AppData\Local\B-Codec Pack\bcodecpack.exe" -s
    3⤵
    - Executes dropped EXE
    PID:3000

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\B-Codec Pack\bcodecpack.exe

Filesize
4.0MB

MD5
6b9f6d74b46a81b1b42cc1d607db91b4

SHA1
8b467470e032a8604b8ac471679e725bd06d267a

SHA256
8c164f8a908f49b5652670065f724806ab9f5dd9ef35313effaadd1ac553b278

SHA512
8249ce72350c4e68329765672eded5678e981d7c403eac5e0ce8a063ce16e6f926ce589c696233c001458cac445e3df212e1e26900d6c856ff223305e6609194

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-BSRN7.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-G3VG7.tmp\dda275edb8ba59a8dfdb94fa81d0e2562876704dd0949ad4505f313f053bf98f.tmp

Filesize
680KB

MD5
74d464fd164a96aa5180f9873d40d566

SHA1
41cc8d1cadb030f7efcfb70b9adb0d9aa887cd25

SHA256
dc60e2be71cbcfd3ee4595ebfb63e0639029b8b744ebee925e63ecb0aa189a14

SHA512
3c4b52df5835a6ae7b8d8cc2aa005fb28a76afb54e5d2480d9eb80931e929e5fb9dc6ca16f5efc7ab04cfd003e6f54356d848b7288c0a5cf64854f3be0d6eb4d

Download Submit
memory/2148-60-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/2148-65-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/2148-63-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/2148-61-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-74-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-86-0x0000000000990000-0x0000000000A32000-memory.dmp

Filesize
648KB

Download
memory/3000-117-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-68-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-114-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-110-0x0000000000990000-0x0000000000A32000-memory.dmp

Filesize
648KB

Download
memory/3000-71-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-109-0x0000000000990000-0x0000000000A32000-memory.dmp

Filesize
648KB

Download
memory/3000-77-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-80-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-83-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-108-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-88-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-93-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-96-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-99-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-102-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/3000-105-0x0000000000400000-0x0000000000808000-memory.dmp

Filesize
4.0MB

Download
memory/4740-10-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/4740-70-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/4844-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4844-69-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4844-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing