socks5systemz | 7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791

General

Target

7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.exe
Size

4.2MB
MD5

5a0091e55a8dde139614c4fe106a6ce1
SHA1

cf965423ca85bb3862c62bd0712d2ead032208fd
SHA256

7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791
SHA512

e78dece9d1a75ee5f2767b2739e1ed24c85fa775615393b51e14c39012fa86b7472b185ded1a740604f5d970ed3fb01cfb3cd4a8a3c36f5f2b1af282976003a0
SSDEEP

98304:sy3FP4P0AHs4AKN4tAT7xdfFG1acTWRYch5fye0xcxLdsV8vSt:syKP0t4AKNwAT1DGnWi8wpxArv6

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

http://dtucboz.info/search/?q=67e28dd83e5cfa2f440afa1d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a471ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ffa14c0ea949833

Signatures

Detect Socks5Systemz Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1052-85-0x0000000002470000-0x0000000002512000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
4368	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp
2664	mixerfreeedition.exe
1052	mixerfreeedition.exe

Loads dropped DLL 1 IoCs

pid	Process
4368	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.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 use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3568 wrote to memory of 4368	3568	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.exe	83
PID 3568 wrote to memory of 4368	3568	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.exe	83
PID 3568 wrote to memory of 4368	3568	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.exe	83
PID 4368 wrote to memory of 2664	4368	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp	87
PID 4368 wrote to memory of 2664	4368	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp	87
PID 4368 wrote to memory of 2664	4368	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp	87
PID 4368 wrote to memory of 1052	4368	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp	88
PID 4368 wrote to memory of 1052	4368	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp	88
PID 4368 wrote to memory of 1052	4368	7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp	88

C:\Users\Admin\AppData\Local\Temp\7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.exe
"C:\Users\Admin\AppData\Local\Temp\7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3568
- C:\Users\Admin\AppData\Local\Temp\is-PR8DT.tmp\7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-PR8DT.tmp\7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp" /SL5="$120032,4101844,54272,C:\Users\Admin\AppData\Local\Temp\7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:4368
- - C:\Users\Admin\AppData\Local\Mixer Free Edition\mixerfreeedition.exe
    "C:\Users\Admin\AppData\Local\Mixer Free Edition\mixerfreeedition.exe" -i
    3⤵
    - Executes dropped EXE
    PID:2664
- - C:\Users\Admin\AppData\Local\Mixer Free Edition\mixerfreeedition.exe
    "C:\Users\Admin\AppData\Local\Mixer Free Edition\mixerfreeedition.exe" -s
    3⤵
    - Executes dropped EXE
    PID:1052

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\Mixer Free Edition\libeay32.dll

Filesize
1.9MB

MD5
5fbd844a6ce26deb5337e8e6dd7c7b70

SHA1
5302e49b2027a07c7bb8f95d45510efc0d954cf8

SHA256
f0d640c4e07c81c29f0ec2b603ec3017bdd4db0d0e26c3fa364a6bbf45826058

SHA512
c383b5ec9fb9efd53cdf00c2b0940fe60a35a857f8be40ae0763647c3523712553910aca8504768cc86895b2168525fa6043d567e66e0ed5696e2c8e5e7b992d

Download Submit
C:\Users\Admin\AppData\Local\Mixer Free Edition\mixerfreeedition.exe

Filesize
1.7MB

MD5
a8114231cdb1fa3459a12f7f95b73993

SHA1
c6f060c139b46da8e51e1143433abc4c2f4c453f

SHA256
71551da3bacea0190f4be447bd00cc91d59cb7f62ea02f67e3541924588411fe

SHA512
88a7ed2a5c770f178bfde5836698f3b5055415c6b2bf7daf17f892a2c669bc3cde56d0f10fe8417c5093dc6fd5197792d280f39d4d7deceabf52ae863734bc5a

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6I4P4.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-PR8DT.tmp\7fcf9da4f0365c791ee2e24a2cdf92f2a42c130ea851380096c267a98e77d791.tmp

Filesize
696KB

MD5
c6061f804038f66af0cbf28c43abf849

SHA1
0473fc63f6514857bba850ce50206fbe8c992b64

SHA256
6261d17d1ab1744496c0f2988954989398d6829f2417df5420ffdf6d64f8678e

SHA512
edf27bfeec82752b6d52a8eb68853dde5d5effd9c3a8c1c93e181167d8bc5ae2c6d7b19ac74955c91aa4e90913fb7dcc8439d33a5e0c8aac5fe71c914596e0ae

Download Submit
memory/1052-95-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-101-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-117-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-114-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-110-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-107-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-69-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-104-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-98-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-89-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-72-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-75-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-78-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-81-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-84-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/1052-85-0x0000000002470000-0x0000000002512000-memory.dmp

Filesize
648KB

Download
memory/2664-63-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/2664-65-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/2664-60-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/2664-59-0x0000000000400000-0x00000000005C3000-memory.dmp

Filesize
1.8MB

Download
memory/3568-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/3568-70-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3568-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4368-71-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/4368-16-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download

Analysis

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