socks5systemz | 1bda055af670cb8e8f37d4860197b58cea1464c16dfaa31fadf42a9eedee8b25

General

Target

stail.exe
Size

4.0MB
MD5

882f0efe9d2215736da375b3542e1575
SHA1

b8f47bc05c2a0d7d336f7c201fc09e6af3b93a41
SHA256

1bda055af670cb8e8f37d4860197b58cea1464c16dfaa31fadf42a9eedee8b25
SHA512

e385accd0c6300c38abe7f8f55ef9fcb5938cbc5baf69f858a43eb36b36d892888ba6a388643dda1bc09cefffcdbda55549d95edf62dcd35b4b0420da109e888
SSDEEP

98304:xdFkdsb9FbCaPoEyB+U9j5bAANbIN8LwjleZvbpmBe:DOSBFpotj5XbW8eqvbpmBe

Score

10^/10

Malware Config

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2856-108-0x00000000029E0000-0x0000000002A82000-memory.dmp	family_socks5systemz
behavioral1/memory/2856-131-0x00000000029E0000-0x0000000002A82000-memory.dmp	family_socks5systemz
behavioral1/memory/2856-132-0x00000000029E0000-0x0000000002A82000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 2 IoCs

pid	Process
2112	is-0NJ88.tmp
2856	middlemediaplayer.exe

Loads dropped DLL 5 IoCs

pid	Process
2560	stail.exe
2112	is-0NJ88.tmp
2112	is-0NJ88.tmp
2112	is-0NJ88.tmp
2112	is-0NJ88.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	45.155.250.90

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

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	stail.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	is-0NJ88.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	middlemediaplayer.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 2112	2560	stail.exe	30
PID 2560 wrote to memory of 2112	2560	stail.exe	30
PID 2560 wrote to memory of 2112	2560	stail.exe	30
PID 2560 wrote to memory of 2112	2560	stail.exe	30
PID 2560 wrote to memory of 2112	2560	stail.exe	30
PID 2560 wrote to memory of 2112	2560	stail.exe	30
PID 2560 wrote to memory of 2112	2560	stail.exe	30
PID 2112 wrote to memory of 2856	2112	is-0NJ88.tmp	31
PID 2112 wrote to memory of 2856	2112	is-0NJ88.tmp	31
PID 2112 wrote to memory of 2856	2112	is-0NJ88.tmp	31
PID 2112 wrote to memory of 2856	2112	is-0NJ88.tmp	31

C:\Users\Admin\AppData\Local\Temp\stail.exe
"C:\Users\Admin\AppData\Local\Temp\stail.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2560
- C:\Users\Admin\AppData\Local\Temp\is-D16O2.tmp\is-0NJ88.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-D16O2.tmp\is-0NJ88.tmp" /SL4 $400E0 "C:\Users\Admin\AppData\Local\Temp\stail.exe" 3960739 52224
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2112
- - C:\Users\Admin\AppData\Local\Middle Media Player\middlemediaplayer.exe
    "C:\Users\Admin\AppData\Local\Middle Media Player\middlemediaplayer.exe" -i
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2856

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Middle Media Player\middlemediaplayer.exe

Filesize
3.8MB

MD5
b18bc890142dafafa5b2d6bd9f578af4

SHA1
2001995e693cedcf7c6ddbed64fcea2eec2bd6bc

SHA256
87d1a53293dd226a27620cf479bc41d457f8bbc7da775a69c4426de7e22eead6

SHA512
e398b96d6b1315dfa823f90ad6eb4fcaab825c83e0ea0c0c94974eedf235b0bd53bb1fd36b0e5f62a858313d30e0da62c306728d3a7c793692f450fe951cf106

Download Submit
\Users\Admin\AppData\Local\Temp\is-D16O2.tmp\is-0NJ88.tmp

Filesize
647KB

MD5
321dc40b1028537e9da09d6cad16b524

SHA1
419dc3963cfe7cdf66a1e23718c52d4dc1623d51

SHA256
95acf4477c6c852bc972eb835ce3d99356c7c1298d9533bc7ab005566d89996f

SHA512
d11dd58068937d67bb0cfca5ed3ab952c796d7579462a9090ec7c8fa7f5da66c30a9ed42d620b4e7be29eb1654a68aadb9a741e1542a6555297d537f7ee4d177

Download Submit
\Users\Admin\AppData\Local\Temp\is-HA895.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-HA895.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
memory/2112-16-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2112-84-0x0000000005A20000-0x0000000005DEC000-memory.dmp

Filesize
3.8MB

Download
memory/2112-115-0x0000000005A20000-0x0000000005DEC000-memory.dmp

Filesize
3.8MB

Download
memory/2112-89-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2560-90-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/2560-2-0x0000000000401000-0x000000000040A000-memory.dmp

Filesize
36KB

Download
memory/2560-0-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/2856-98-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-85-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-95-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-86-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-101-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-104-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-107-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-108-0x00000000029E0000-0x0000000002A82000-memory.dmp

Filesize
648KB

Download
memory/2856-114-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-92-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-118-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-121-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-124-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-127-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-130-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-131-0x00000000029E0000-0x0000000002A82000-memory.dmp

Filesize
648KB

Download
memory/2856-132-0x00000000029E0000-0x0000000002A82000-memory.dmp

Filesize
648KB

Download
memory/2856-136-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download
memory/2856-139-0x0000000000400000-0x00000000007CC000-memory.dmp

Filesize
3.8MB

Download

Analysis

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