socks5systemz | 7f2e61445c1de7e7f873e136d65e79c54aef5c91fc9239286d198162779312d0

General

Target

4fa524896f7acb979cb8900b03479272.exe
Size

5.0MB
MD5

4fa524896f7acb979cb8900b03479272
SHA1

d051e47915937d64fb6fcd4a3640c345ad892a18
SHA256

7f2e61445c1de7e7f873e136d65e79c54aef5c91fc9239286d198162779312d0
SHA512

8ff818f1a2a3f149bc93d1ba6998a32e3985f1c0bc5ef9f60b2b19ee346982c85ec895db0e9195dd00635d5ce61d9de33e6b896d4ca7e0eab02be6e23b39743d
SSDEEP

98304:m+29v/40m11zG86IPCx1aB1XGLIxbPvEeQ2bwRwgJbwqaHoyMf3j3RDRe:bSv/4l1pz6laBYIJnPsag+qaHoFRD0

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

bdllgev.com

http://bdllgev.com/search/?q=67e28dd86f5ff42d4509ac187c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978f771ea771795af8e05c645db22f31df92d8b38e316a667d307eca743ec4c2b07b52966923a6f8dff10c7eb97

Signatures

Detect Socks5Systemz Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2680-93-0x0000000002680000-0x0000000002722000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
2732	4fa524896f7acb979cb8900b03479272.tmp
2724	moonvoiceassist32_64.exe
2680	moonvoiceassist32_64.exe

Loads dropped DLL 5 IoCs

pid	Process
1560	4fa524896f7acb979cb8900b03479272.exe
2732	4fa524896f7acb979cb8900b03479272.tmp
2732	4fa524896f7acb979cb8900b03479272.tmp
2732	4fa524896f7acb979cb8900b03479272.tmp
2732	4fa524896f7acb979cb8900b03479272.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
2732	4fa524896f7acb979cb8900b03479272.tmp

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1560 wrote to memory of 2732	1560	4fa524896f7acb979cb8900b03479272.exe	28
PID 1560 wrote to memory of 2732	1560	4fa524896f7acb979cb8900b03479272.exe	28
PID 1560 wrote to memory of 2732	1560	4fa524896f7acb979cb8900b03479272.exe	28
PID 1560 wrote to memory of 2732	1560	4fa524896f7acb979cb8900b03479272.exe	28
PID 1560 wrote to memory of 2732	1560	4fa524896f7acb979cb8900b03479272.exe	28
PID 1560 wrote to memory of 2732	1560	4fa524896f7acb979cb8900b03479272.exe	28
PID 1560 wrote to memory of 2732	1560	4fa524896f7acb979cb8900b03479272.exe	28
PID 2732 wrote to memory of 2724	2732	4fa524896f7acb979cb8900b03479272.tmp	29
PID 2732 wrote to memory of 2724	2732	4fa524896f7acb979cb8900b03479272.tmp	29
PID 2732 wrote to memory of 2724	2732	4fa524896f7acb979cb8900b03479272.tmp	29
PID 2732 wrote to memory of 2724	2732	4fa524896f7acb979cb8900b03479272.tmp	29
PID 2732 wrote to memory of 2680	2732	4fa524896f7acb979cb8900b03479272.tmp	30
PID 2732 wrote to memory of 2680	2732	4fa524896f7acb979cb8900b03479272.tmp	30
PID 2732 wrote to memory of 2680	2732	4fa524896f7acb979cb8900b03479272.tmp	30
PID 2732 wrote to memory of 2680	2732	4fa524896f7acb979cb8900b03479272.tmp	30

C:\Users\Admin\AppData\Local\Temp\4fa524896f7acb979cb8900b03479272.exe
"C:\Users\Admin\AppData\Local\Temp\4fa524896f7acb979cb8900b03479272.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1560
- C:\Users\Admin\AppData\Local\Temp\is-25B2N.tmp\4fa524896f7acb979cb8900b03479272.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-25B2N.tmp\4fa524896f7acb979cb8900b03479272.tmp" /SL5="$5014C,4971959,54272,C:\Users\Admin\AppData\Local\Temp\4fa524896f7acb979cb8900b03479272.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Users\Admin\AppData\Local\Moon Voice Assist\moonvoiceassist32_64.exe
    "C:\Users\Admin\AppData\Local\Moon Voice Assist\moonvoiceassist32_64.exe" -i
    3⤵
    - Executes dropped EXE
    PID:2724
- - C:\Users\Admin\AppData\Local\Moon Voice Assist\moonvoiceassist32_64.exe
    "C:\Users\Admin\AppData\Local\Moon Voice Assist\moonvoiceassist32_64.exe" -s
    3⤵
    - Executes dropped EXE
    PID:2680

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

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Downloads

\Users\Admin\AppData\Local\Moon Voice Assist\moonvoiceassist32_64.exe

Filesize
3.1MB

MD5
162b05f5a6cb1ba1635307f8025f89d1

SHA1
7c6c563214236b3deb4d91727fad77d78dfd4a31

SHA256
500214d4ab1b337d579fe97da371ca3857684f096655db6b9409c4be8d3e61c6

SHA512
6ab7a6733dc341efc29afd2b300b60973747a2c98be324edeaa3a62bc6a9a68f8525fd58e99e0c6bec410ee57ac4384283a7ce108a2dd147b8f3db764b2a0529

Download Submit
\Users\Admin\AppData\Local\Temp\is-25B2N.tmp\4fa524896f7acb979cb8900b03479272.tmp

Filesize
680KB

MD5
895d982b558dbe81e0d8d31e818f766e

SHA1
27d9e61b8edaf48db4c519be05f0f4ea33900a7a

SHA256
3c0328c6c8c37a3e81cb28c46eeb4c98f033eaf28326903ac6e7204d23928cfb

SHA512
4ab3f51fe1f4b7ce5bd6e21518de1ebae7b631bb4a968a424efff6db1a53755853478db108547492a2784c55f1d934f776388232f556880f682e401c45b7db97

Download Submit
\Users\Admin\AppData\Local\Temp\is-OEEOB.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-OEEOB.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
memory/1560-74-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1560-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1560-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/2680-93-0x0000000002680000-0x0000000002722000-memory.dmp

Filesize
648KB

Download
memory/2680-102-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-121-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-118-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-72-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-114-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-111-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-76-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-108-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-80-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-83-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-86-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-89-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-92-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-105-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2680-99-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2724-65-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2724-70-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2724-66-0x0000000000400000-0x0000000000721000-memory.dmp

Filesize
3.1MB

Download
memory/2732-16-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2732-79-0x0000000003B70000-0x0000000003E91000-memory.dmp

Filesize
3.1MB

Download
memory/2732-75-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2732-64-0x0000000003B70000-0x0000000003E91000-memory.dmp

Filesize
3.1MB

Download

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