socks5systemz | 6185fdacf0b903ea8bb2eee380a0c60e314ad7da93c7833b188c796f3f97b5be

General

Target

crt.exe
Size

5.1MB
MD5

101f00585e773ec198e3e0721f0d582d
SHA1

c1ca25c1f6e709f61596d2be1843a629b171dd59
SHA256

6185fdacf0b903ea8bb2eee380a0c60e314ad7da93c7833b188c796f3f97b5be
SHA512

15c06517403fd1d492b40f3c8a60c392dc6a6087e8b9610e022906b977dc45b9087ed3e7b2091ff8522b766c9f441da2797bb70fb7942400f699a9717402c556
SSDEEP

98304:mkwXtlj7PeddJb7xJvyRgG6P7rTpc91us3KLCZTf9X8oK878t:2Laddz1ymG6P7rtcCSKLCZD93C

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

bfuzipi.com

http://bfuzipi.com/search/?q=67e28dd8685af379125bfd4e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa49e8889b5e4fa9281ae978f271ea771795af8e05c645db22f31dfe339426fa11a366c350adb719a9577e55b8603e983a608ff612c2eb909939

http://bfuzipi.com/search/?q=67e28dd8685af379125bfd4e7c27d78406abdd88be4b12eab517aa5c96bd86ee92824e865a8bbc896c58e713bc90c91c36b5281fc235a925ed3e51d6bd974a95129070b616e96cc92be510b866db52bee348ee4c2b14a82966836f23d7f210c7ee9c9939c96a9514

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral2/memory/4136-85-0x00000000009B0000-0x0000000000A52000-memory.dmp	family_socks5systemz
behavioral2/memory/4136-109-0x00000000009B0000-0x0000000000A52000-memory.dmp	family_socks5systemz
behavioral2/memory/4136-108-0x00000000009B0000-0x0000000000A52000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
524	crt.tmp
1712	mp3ripfreeedition32.exe
4136	mp3ripfreeedition32.exe

Loads dropped DLL 1 IoCs

pid	Process
524	crt.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
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
524	crt.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1448 wrote to memory of 524	1448	crt.exe	74
PID 1448 wrote to memory of 524	1448	crt.exe	74
PID 1448 wrote to memory of 524	1448	crt.exe	74
PID 524 wrote to memory of 1712	524	crt.tmp	75
PID 524 wrote to memory of 1712	524	crt.tmp	75
PID 524 wrote to memory of 1712	524	crt.tmp	75
PID 524 wrote to memory of 4136	524	crt.tmp	76
PID 524 wrote to memory of 4136	524	crt.tmp	76
PID 524 wrote to memory of 4136	524	crt.tmp	76

C:\Users\Admin\AppData\Local\Temp\crt.exe
"C:\Users\Admin\AppData\Local\Temp\crt.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1448
- C:\Users\Admin\AppData\Local\Temp\is-0BO17.tmp\crt.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-0BO17.tmp\crt.tmp" /SL5="$70214,5052624,54272,C:\Users\Admin\AppData\Local\Temp\crt.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:524
- - C:\Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe
    "C:\Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe" -i
    3⤵
    - Executes dropped EXE
    PID:1712
- - C:\Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe
    "C:\Users\Admin\AppData\Local\MP3 RIP Free Edition\mp3ripfreeedition32.exe" -s
    3⤵
    - Executes dropped EXE
    PID:4136

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\MP3 RIP Free Edition\mp3ripfreeedition32.exe

Filesize
3.2MB

MD5
9e75cd003585ff2f172a841d41ed6d75

SHA1
9d551f43cfeb84d1a585d53d2bdde8e17be436bc

SHA256
c576f2f3581928de1e62be3e4efff1b5c5415e89c3bdc0cd5536ce41a781c370

SHA512
817c32c8943325d27723274425c4fa5c3fb7f36c52a2c85f8038e956033edf96b5d9340df3238865b706fffd8094b1ba3e940bcc17e2feae24d1b15fe2fac67c

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-0BO17.tmp\crt.tmp

Filesize
680KB

MD5
9a46eeaa9fb1370478ba7108b30aab2b

SHA1
045f0a44dd0f4710013a390da2865a2fac04389e

SHA256
71693251b98a555e6e01fcabf559218ad137f5de772218631147c3d87fc31820

SHA512
89ee61a63303ee11d77596e80e0abec6ede6c1fbba1b6bc6ee50991da335426b4fb0cc7d7a90c3c33d56dda222592a3090e771b9fcaef2f6e5951b78467fef66

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

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
memory/524-69-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/524-16-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1448-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1448-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/1448-68-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1712-59-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/1712-60-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/1712-64-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-76-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-95-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-73-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-67-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-79-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-82-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-85-0x00000000009B0000-0x0000000000A52000-memory.dmp

Filesize
648KB

Download
memory/4136-87-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-92-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-70-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-98-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-101-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-104-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-107-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-109-0x00000000009B0000-0x0000000000A52000-memory.dmp

Filesize
648KB

Download
memory/4136-108-0x00000000009B0000-0x0000000000A52000-memory.dmp

Filesize
648KB

Download
memory/4136-113-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download
memory/4136-116-0x0000000000400000-0x0000000000738000-memory.dmp

Filesize
3.2MB

Download

Analysis

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