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://beuckeo.com/search/?q=67e28dd86c09f220490efa1c7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ae8889b5e4fa9281ae978fe71ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ef611c9e794993f

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral2/memory/2980-66-0x0000000000AF0000-0x0000000000B92000-memory.dmp	family_socks5systemz
behavioral2/memory/2980-69-0x0000000000AF0000-0x0000000000B92000-memory.dmp	family_socks5systemz
behavioral2/memory/2980-78-0x0000000000AF0000-0x0000000000B92000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
3492	2f79a7faaa1e8d04086b4090f141697c.tmp
3308	cdshrink.exe
2980	cdshrink.exe

Loads dropped DLL 1 IoCs

pid	Process
3492	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
3492	2f79a7faaa1e8d04086b4090f141697c.tmp
3492	2f79a7faaa1e8d04086b4090f141697c.tmp

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3492	2f79a7faaa1e8d04086b4090f141697c.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1892 wrote to memory of 3492	1892	2f79a7faaa1e8d04086b4090f141697c.exe	88
PID 1892 wrote to memory of 3492	1892	2f79a7faaa1e8d04086b4090f141697c.exe	88
PID 1892 wrote to memory of 3492	1892	2f79a7faaa1e8d04086b4090f141697c.exe	88
PID 3492 wrote to memory of 3308	3492	2f79a7faaa1e8d04086b4090f141697c.tmp	92
PID 3492 wrote to memory of 3308	3492	2f79a7faaa1e8d04086b4090f141697c.tmp	92
PID 3492 wrote to memory of 3308	3492	2f79a7faaa1e8d04086b4090f141697c.tmp	92
PID 3492 wrote to memory of 2980	3492	2f79a7faaa1e8d04086b4090f141697c.tmp	93
PID 3492 wrote to memory of 2980	3492	2f79a7faaa1e8d04086b4090f141697c.tmp	93
PID 3492 wrote to memory of 2980	3492	2f79a7faaa1e8d04086b4090f141697c.tmp	93

C:\Users\Admin\AppData\Local\Temp\2f79a7faaa1e8d04086b4090f141697c.exe
"C:\Users\Admin\AppData\Local\Temp\2f79a7faaa1e8d04086b4090f141697c.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1892
- C:\Users\Admin\AppData\Local\Temp\is-IUC15.tmp\2f79a7faaa1e8d04086b4090f141697c.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-IUC15.tmp\2f79a7faaa1e8d04086b4090f141697c.tmp" /SL5="$60056,2507591,56832,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:3492
- - C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe
    "C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe" -i
    3⤵
    - Executes dropped EXE
    PID:3308
- - C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe
    "C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe" -s
    3⤵
    - Executes dropped EXE
    PID:2980

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

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

Filesize
3.2MB

MD5
a945a6da059ef1c2363aa3547dfb7ab2

SHA1
2ba5cbdad15907960b888dd5f2c14f21ac52e337

SHA256
57e22a462e68d92b597c28654d7e058c52138884fac8b1f33480ee8912a6ccb7

SHA512
46da031da97d04371f622a74b97a099a2846949048ff4df905e3f35a799c43163c8908c3af7f7f0a4fa5ef75d9409f64ffa29c9078c2f70f3d3cb908d24458ef

Download Submit
C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe

Filesize
2.9MB

MD5
5de65afc7ae7c73a77c52ed3e8d9d69e

SHA1
28730206bf567d0a9ceda4acc015f997db4a948b

SHA256
4ece3734faec18630fc0f6cc7fab234f6e88b2e6cc193595542bad982f252eed

SHA512
ed1bc05e04715f10bd0b023ae83722834b19e7a7bf0c8dda9799b602b16d27c443e9036bdf6fba97e881a4688822385f9be0ec8c59e89a12562efadd1ff561f9

Download Submit
C:\Users\Admin\AppData\Local\CD Shrink\cdshrink.exe

Filesize
2.4MB

MD5
2c361beed58bd92967d1f93784f034c1

SHA1
132b002909251d1b0aa23a3f9ec299ada0eb436c

SHA256
0aa23d522a3bd8583e07125ed07b4ba19c66dd16a787d5250289b23c71592a46

SHA512
e35155faa35004f167eb74c3bb3ed7ef1316d5259a3735e55d30484039b1cd6e042c0b0fc80d75a82b0d95af0b2c0af74fb84de65320931272a29af2f61a3ec8

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-EN885.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-IUC15.tmp\2f79a7faaa1e8d04086b4090f141697c.tmp

Filesize
690KB

MD5
227526be87fbf4b4932a4f1ed146f82d

SHA1
8c5e96d4d6a517d1f94d14f2f13095022345ee8a

SHA256
7b157795b93dd287cbb24a23220ef262268430bfb657ecd3325c8e4c2d948953

SHA512
7d47234899e71db7cc3d2c516baaf820599654b22d82cb11eb3b5c199230021188406717405694c13c676a06e08eae865e81627108c8333c9ced94671d776fb4

Download Submit
memory/1892-2-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1892-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1892-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2980-67-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-77-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-97-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-94-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-44-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-46-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-90-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-87-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-49-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-84-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-53-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-54-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-57-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-60-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-63-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-66-0x0000000000AF0000-0x0000000000B92000-memory.dmp

Filesize
648KB

Download
memory/2980-81-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-69-0x0000000000AF0000-0x0000000000B92000-memory.dmp

Filesize
648KB

Download
memory/2980-74-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/2980-78-0x0000000000AF0000-0x0000000000B92000-memory.dmp

Filesize
648KB

Download
memory/3308-42-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/3308-37-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/3308-41-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/3308-38-0x0000000000400000-0x0000000000742000-memory.dmp

Filesize
3.3MB

Download
memory/3492-7-0x0000000002340000-0x0000000002341000-memory.dmp

Filesize
4KB

Download
memory/3492-50-0x0000000002340000-0x0000000002341000-memory.dmp

Filesize
4KB

Download
memory/3492-48-0x0000000000400000-0x00000000004BC000-memory.dmp

Filesize
752KB

Download

Analysis

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