socks5systemz | 3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4

General

Target

3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.exe
Size

4.9MB
MD5

dfb176122ad4f536187cb8ce0ad60ad3
SHA1

5b2d9e9f8aaf507cacc66eaadab7adb9343052aa
SHA256

3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4
SHA512

b341728feac15b6941c387b1f8b3ff3e9fccb580727a128f0f910d10ed0a8c508c3cad8dbbbb299d5591987ebabaf888b26a4a5fcecdab7c49b52a568fa0a177
SSDEEP

98304:CiL1eZyaXe3fxNWMg1RcKRXCwQZ/7CEm6SUpSUUMHFOF7W4h2bcC1Qxr:h1QX4DhgHcKEZjeoSw0ytbpQB

Score

10^/10

Malware Config

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral2/memory/960-86-0x0000000000AD0000-0x0000000000B71000-memory.dmp	family_socks5systemz
behavioral2/memory/960-109-0x0000000000AD0000-0x0000000000B71000-memory.dmp	family_socks5systemz
behavioral2/memory/960-108-0x0000000000AD0000-0x0000000000B71000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp
1372	vkfreeaudiosaver.exe
960	vkfreeaudiosaver.exe

Loads dropped DLL 1 IoCs

pid	Process
3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.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	152.89.198.214

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
3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4260 wrote to memory of 3896	4260	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.exe	81
PID 4260 wrote to memory of 3896	4260	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.exe	81
PID 4260 wrote to memory of 3896	4260	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.exe	81
PID 3896 wrote to memory of 1372	3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp	82
PID 3896 wrote to memory of 1372	3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp	82
PID 3896 wrote to memory of 1372	3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp	82
PID 3896 wrote to memory of 960	3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp	83
PID 3896 wrote to memory of 960	3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp	83
PID 3896 wrote to memory of 960	3896	3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp	83

C:\Users\Admin\AppData\Local\Temp\3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.exe
"C:\Users\Admin\AppData\Local\Temp\3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4260
- C:\Users\Admin\AppData\Local\Temp\is-96O0Q.tmp\3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-96O0Q.tmp\3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp" /SL5="$C0266,4933346,54272,C:\Users\Admin\AppData\Local\Temp\3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:3896
- - C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exe
    "C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exe" -i
    3⤵
    - Executes dropped EXE
    PID:1372
- - C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exe
    "C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exe" -s
    3⤵
    - Executes dropped EXE
    PID:960

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

C:\Users\Admin\AppData\Local\Temp\is-96O0Q.tmp\3a9ac13cb6255e6c8e46096de49681d9c82a35e5128ae22b6dcfd6366f7315b4.tmp

Filesize
680KB

MD5
2063e43e6fbdcae73e5424ca0d9dc199

SHA1
ee17088154fe281ee6b2b07f7ad8b490abe78dbf

SHA256
8a16636dc95ffac9f6e7dc17a178b87b4d3df80c905bdb7d43cb0d98718afa37

SHA512
5c26096b16e0230f462738939198026bd84fb8b2eab80258df7766a3be995802aea002e76fcb42f1e82470059bf4422abb0aeac7fe49a79a1204f9a69ab3ef87

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-MPGC8.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

Filesize
3.2MB

MD5
b340f37cb03b2e7ddeda53aa2a997db2

SHA1
1c050eadc50e65954ee0b83b90d11001ac62bedf

SHA256
30e6f3223dac4397683d95ab113d4909a1068706032f338240a1000f8c088cc0

SHA512
07479d8c40e98935fbd9ccaa0aa0b38a803ed13dfc8bfe183c430b70692fb35ad07b4075b5cd8fc91fe1a762a7d1e832640e8b88438b8fc5f85fe635a5c66139

Download Submit
memory/960-98-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-101-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-116-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-113-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-108-0x0000000000AD0000-0x0000000000B71000-memory.dmp

Filesize
644KB

Download
memory/960-109-0x0000000000AD0000-0x0000000000B71000-memory.dmp

Filesize
644KB

Download
memory/960-67-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-107-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-104-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-70-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-73-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-76-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-79-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-82-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-86-0x0000000000AD0000-0x0000000000B71000-memory.dmp

Filesize
644KB

Download
memory/960-85-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-92-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/960-95-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/1372-63-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/1372-60-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/1372-59-0x0000000000400000-0x0000000000740000-memory.dmp

Filesize
3.2MB

Download
memory/3896-10-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/3896-69-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/4260-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4260-68-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4260-3-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download

Analysis

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