socks5systemz | 83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8

General

Target

83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.exe
Size

5.2MB
MD5

55db085a5e2ae74fba99159dd4c7d159
SHA1

fd7fc239dc4355c3a15268958c21708f214d1cf2
SHA256

83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8
SHA512

689d4811f650ed1bd424851b5a730b91bf8104c75719901f053ea4f7c021538baa05b88a7325a29a6b2ed3bfa405767e30a1b9ca2a8e001b8df5dc646305f1c3
SSDEEP

98304:CACzFqEtInZjnKwc3s+HO3J2cxQal2ANiSx7TWJoDfiQx9W:pkl6y3i3J2cmm2CByobiQa

Score

10^/10

Malware Config

Signatures

Detect Socks5Systemz Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1328-84-0x00000000008E0000-0x0000000000982000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp
3688	vkfreeaudiosaver32_64.exe
1328	vkfreeaudiosaver32_64.exe

Loads dropped DLL 1 IoCs

pid	Process
4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp

Unexpected DNS network traffic destination 2 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
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
4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 4688	2196	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.exe	74
PID 2196 wrote to memory of 4688	2196	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.exe	74
PID 2196 wrote to memory of 4688	2196	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.exe	74
PID 4688 wrote to memory of 3688	4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp	75
PID 4688 wrote to memory of 3688	4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp	75
PID 4688 wrote to memory of 3688	4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp	75
PID 4688 wrote to memory of 1328	4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp	76
PID 4688 wrote to memory of 1328	4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp	76
PID 4688 wrote to memory of 1328	4688	83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp	76

C:\Users\Admin\AppData\Local\Temp\83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.exe
"C:\Users\Admin\AppData\Local\Temp\83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Local\Temp\is-R6G8J.tmp\83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-R6G8J.tmp\83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp" /SL5="$50206,5154567,54272,C:\Users\Admin\AppData\Local\Temp\83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:4688
- - C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver32_64.exe
    "C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver32_64.exe" -i
    3⤵
    - Executes dropped EXE
    PID:3688
- - C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver32_64.exe
    "C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver32_64.exe" -s
    3⤵
    - Executes dropped EXE
    PID:1328

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\Temp\is-R6G8J.tmp\83a475e89ba47df9bc3b5e27bb3af2928da01fc25a2de4d672db2e61b22d95e8.tmp

Filesize
680KB

MD5
70295416713c0ce535665d806e3d54ac

SHA1
fe13c334ec67412f41fe190f93da7d45a57eccbd

SHA256
958c5f807a8268b09828e0f02a6c75a92f3a87dbd1853eb62e5996db990ba2ba

SHA512
2336597fb6ffe697ba62cd931479108556fee44319176989f961ae43aea62b111df6870a169202c6d960aface42779a2f82db48a69fe2072b711a512812f925c

Download Submit
C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver32_64.exe

Filesize
3.7MB

MD5
a4314810759c9456741ee5422dec7d40

SHA1
134e37ab440160748bf18f7b4118bfa9e8462089

SHA256
f6e0869136b1793e3381ad5f47edfd2de8846688891958b691348a09d0e4a00f

SHA512
9b12747794263a5c5fda629ad4f8a7b858aa371aae9a8ca3917f13f9a4f2cdb7bfba1d4b4c1099bcd63da7c077f6bc95f27bdf2afb299c1e2e2a1d799526980c

Download Submit
\Users\Admin\AppData\Local\Temp\is-75ORK.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
memory/1328-106-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-100-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-128-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-125-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-122-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-118-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-115-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-112-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-68-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-109-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-72-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-75-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-78-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-81-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-103-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-91-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-84-0x00000000008E0000-0x0000000000982000-memory.dmp

Filesize
648KB

Download
memory/1328-94-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-97-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/1328-86-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/2196-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2196-66-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2196-3-0x00007FFB82DA0000-0x00007FFB82F7B000-memory.dmp

Filesize
1.9MB

Download
memory/3688-63-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/3688-60-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/3688-59-0x0000000000400000-0x00000000007AE000-memory.dmp

Filesize
3.7MB

Download
memory/4688-16-0x00007FFB82DA0000-0x00007FFB82F7B000-memory.dmp

Filesize
1.9MB

Download
memory/4688-71-0x00007FFB82DA0000-0x00007FFB82F7B000-memory.dmp

Filesize
1.9MB

Download
memory/4688-67-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download

Analysis

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