socks5systemz | d06a3ee9fa7d2e183950a405ef20020bf4184e98efd7535bd0229de00d2b2d4e

General

Target

2f79a7faaa1e8d04086b4090f141697c.exe
Size

2.7MB
MD5

2f79a7faaa1e8d04086b4090f141697c
SHA1

7bd91b3155571b764c5f64e7a00c31f866f1d83f
SHA256

d06a3ee9fa7d2e183950a405ef20020bf4184e98efd7535bd0229de00d2b2d4e
SHA512

80cee58a4928f6a020b05bb120e36604ebb66c1f692248be5da188b4553530405b6f1cd9b663fa8a146a10a71a50bc0466f10b3094a5bfd00357bb0403ad442a
SSDEEP

49152:C9/cn2d8HF9ybHXQiQvECr6/U05dNiQdnEiezQwWwqV8tB:M/cLnybHXQiivun5dNzdnEiMQwWdVUB

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

http://csedzxn.net/search/?q=67e28dd83f0bf1291606a9177c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978f171ea771795af8e05c645db22f31df92d8b38e316a667d307eca743ec4c2b07b52966923b6e8ef619c1ec93

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2524-72-0x0000000002780000-0x0000000002822000-memory.dmp	family_socks5systemz
behavioral1/memory/2524-75-0x0000000002780000-0x0000000002822000-memory.dmp	family_socks5systemz
behavioral1/memory/2524-84-0x0000000002780000-0x0000000002822000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
2504	2f79a7faaa1e8d04086b4090f141697c.tmp
2644	cdshrink.exe
2524	cdshrink.exe

Loads dropped DLL 5 IoCs

pid	Process
1876	2f79a7faaa1e8d04086b4090f141697c.exe
2504	2f79a7faaa1e8d04086b4090f141697c.tmp
2504	2f79a7faaa1e8d04086b4090f141697c.tmp
2504	2f79a7faaa1e8d04086b4090f141697c.tmp
2504	2f79a7faaa1e8d04086b4090f141697c.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	91.211.247.248

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2504	2f79a7faaa1e8d04086b4090f141697c.tmp
2504	2f79a7faaa1e8d04086b4090f141697c.tmp

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2504	2f79a7faaa1e8d04086b4090f141697c.tmp

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 2504	1876	2f79a7faaa1e8d04086b4090f141697c.exe	28
PID 1876 wrote to memory of 2504	1876	2f79a7faaa1e8d04086b4090f141697c.exe	28
PID 1876 wrote to memory of 2504	1876	2f79a7faaa1e8d04086b4090f141697c.exe	28
PID 1876 wrote to memory of 2504	1876	2f79a7faaa1e8d04086b4090f141697c.exe	28
PID 1876 wrote to memory of 2504	1876	2f79a7faaa1e8d04086b4090f141697c.exe	28
PID 1876 wrote to memory of 2504	1876	2f79a7faaa1e8d04086b4090f141697c.exe	28
PID 1876 wrote to memory of 2504	1876	2f79a7faaa1e8d04086b4090f141697c.exe	28
PID 2504 wrote to memory of 2644	2504	2f79a7faaa1e8d04086b4090f141697c.tmp	29
PID 2504 wrote to memory of 2644	2504	2f79a7faaa1e8d04086b4090f141697c.tmp	29
PID 2504 wrote to memory of 2644	2504	2f79a7faaa1e8d04086b4090f141697c.tmp	29
PID 2504 wrote to memory of 2644	2504	2f79a7faaa1e8d04086b4090f141697c.tmp	29
PID 2504 wrote to memory of 2524	2504	2f79a7faaa1e8d04086b4090f141697c.tmp	30
PID 2504 wrote to memory of 2524	2504	2f79a7faaa1e8d04086b4090f141697c.tmp	30
PID 2504 wrote to memory of 2524	2504	2f79a7faaa1e8d04086b4090f141697c.tmp	30
PID 2504 wrote to memory of 2524	2504	2f79a7faaa1e8d04086b4090f141697c.tmp	30

C:\Users\Admin\AppData\Local\Temp\2f79a7faaa1e8d04086b4090f141697c.exe
"C:\Users\Admin\AppData\Local\Temp\2f79a7faaa1e8d04086b4090f141697c.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Users\Admin\AppData\Local\Temp\is-OQTAK.tmp\2f79a7faaa1e8d04086b4090f141697c.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-OQTAK.tmp\2f79a7faaa1e8d04086b4090f141697c.tmp" /SL5="$4010A,2507591,56832,C:\Users\Admin\AppData\Local\Temp\2f79a7faaa1e8d04086b4090f141697c.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:2504
- - C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe
    "C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe" -i
    3⤵
    - Executes dropped EXE
    PID:2644
- - C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe
    "C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe" -s
    3⤵
    - Executes dropped EXE
    PID:2524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe

Filesize
3.2MB

MD5
a945a6da059ef1c2363aa3547dfb7ab2

SHA1
2ba5cbdad15907960b888dd5f2c14f21ac52e337

SHA256
57e22a462e68d92b597c28654d7e058c52138884fac8b1f33480ee8912a6ccb7

SHA512
46da031da97d04371f622a74b97a099a2846949048ff4df905e3f35a799c43163c8908c3af7f7f0a4fa5ef75d9409f64ffa29c9078c2f70f3d3cb908d24458ef

Download Submit
\Users\Admin\AppData\Local\Temp\is-N7DI8.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-N7DI8.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-OQTAK.tmp\2f79a7faaa1e8d04086b4090f141697c.tmp

Filesize
690KB

MD5
227526be87fbf4b4932a4f1ed146f82d

SHA1
8c5e96d4d6a517d1f94d14f2f13095022345ee8a

SHA256
7b157795b93dd287cbb24a23220ef262268430bfb657ecd3325c8e4c2d948953

SHA512
7d47234899e71db7cc3d2c516baaf820599654b22d82cb11eb3b5c199230021188406717405694c13c676a06e08eae865e81627108c8333c9ced94671d776fb4

Download Submit
memory/1876-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1876-1-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2504-8-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2504-40-0x0000000003560000-0x00000000038A2000-memory.dmp

Filesize
3.3MB

Download
memory/2504-56-0x0000000003560000-0x00000000038A2000-memory.dmp

Filesize
3.3MB

Download
memory/2504-55-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/2504-53-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download
memory/2524-75-0x0000000002780000-0x0000000002822000-memory.dmp

Filesize
648KB

Download
memory/2524-72-0x0000000002780000-0x0000000002822000-memory.dmp

Filesize
648KB

Download
memory/2524-103-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-54-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-100-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-96-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-59-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-60-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-63-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-66-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-69-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-51-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-74-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-93-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-80-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-83-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-84-0x0000000002780000-0x0000000002822000-memory.dmp

Filesize
648KB

Download
memory/2524-87-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2524-90-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2644-43-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2644-44-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2644-47-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2644-48-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download

Analysis

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