socks5systemz | 08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b

General

Target

08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.exe
Size

3.7MB
MD5

6b5899041652efc13c1990b074cd7fc9
SHA1

ec1902e8b3008c363632f0a91aeebd67f3d2501a
SHA256

08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b
SHA512

cc0b882e45fe8f21295712e0345fd14c3f77414cfe821c3ea8cc3a8e3486753a7fca991c2a54dba6915ad853b15ac832e7ff0c732eaea8daf0d7aad5be3d11e7
SSDEEP

98304:CuzzeZnWkxTw2d2OrnxfErBoXNw0RLPV9:dzYnP1rxEAzPV9

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

http://aitvzei.ru/search/?q=67e28dd86f5af1211209a81b7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa48e8889b5e4fa9281ae978f071ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ffd16c5e7939e38

http://aitvzei.ru/search/?q=67e28dd86f5af1211209a81b7c27d78406abdd88be4b12eab517aa5c96bd86e890844f835a8bbc896c58e713bc90c91d36b5281fc235a925ed3e53d6bd974a95129070b616e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7ee979d3ec5699215

Signatures

Detect Socks5Systemz Payload 4 IoCs

resource	yara_rule
behavioral1/memory/5048-68-0x0000000000980000-0x0000000000A22000-memory.dmp	family_socks5systemz
behavioral1/memory/5048-78-0x0000000000980000-0x0000000000A22000-memory.dmp	family_socks5systemz
behavioral1/memory/5048-91-0x0000000000980000-0x0000000000A22000-memory.dmp	family_socks5systemz
behavioral1/memory/5048-92-0x0000000000980000-0x0000000000A22000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
268	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp
4188	modernbestaudio.exe
5048	modernbestaudio.exe

Loads dropped DLL 1 IoCs

pid	Process
268	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.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

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1664 wrote to memory of 268	1664	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.exe	86
PID 1664 wrote to memory of 268	1664	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.exe	86
PID 1664 wrote to memory of 268	1664	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.exe	86
PID 268 wrote to memory of 4188	268	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp	89
PID 268 wrote to memory of 4188	268	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp	89
PID 268 wrote to memory of 4188	268	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp	89
PID 268 wrote to memory of 5048	268	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp	90
PID 268 wrote to memory of 5048	268	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp	90
PID 268 wrote to memory of 5048	268	08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp	90

C:\Users\Admin\AppData\Local\Temp\08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.exe
"C:\Users\Admin\AppData\Local\Temp\08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1664
- C:\Users\Admin\AppData\Local\Temp\is-IOL23.tmp\08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-IOL23.tmp\08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp" /SL5="$8011E,3484214,54272,C:\Users\Admin\AppData\Local\Temp\08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:268
- - C:\Users\Admin\AppData\Local\Modern Best Audio\modernbestaudio.exe
    "C:\Users\Admin\AppData\Local\Modern Best Audio\modernbestaudio.exe" -i
    3⤵
    - Executes dropped EXE
    PID:4188
- - C:\Users\Admin\AppData\Local\Modern Best Audio\modernbestaudio.exe
    "C:\Users\Admin\AppData\Local\Modern Best Audio\modernbestaudio.exe" -s
    3⤵
    - Executes dropped EXE
    PID:5048

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\Modern Best Audio\modernbestaudio.exe

Filesize
3.1MB

MD5
06c365186ff613c4d474647950401d69

SHA1
9c83fe6f80f1280111e01ddb40db6fdbdd77b219

SHA256
806d3e81a0bb8d0c336bb8f52ee8429fb56a9aed761d3e839b508eecb02ef669

SHA512
95361ed856ed4dc759b61f40d33c64928c5eac6659516bf346d9ae244a41500e6840f3ae72b6c0327be0015b72ce62ac783d93f0f7e12e4bd1413f5828f794ab

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-IOL23.tmp\08fc98ff08fe889ef2be12ecc56e16aac795a4874b9c1c37b1b7d0d8fb207f8b.tmp

Filesize
680KB

MD5
ff426cdf1da8c8b32b5d94ca05fd36be

SHA1
275b2a1f6101d112814ddd3bcbfa3bda6810854f

SHA256
2e9b5d3eb2521d06130c7ed6084e6d17da1fe0b4e1e7b5284af44779c64cb834

SHA512
3d078f497c50a356775006508e2b34bae095a094289e9ef603e09ed0912b6f086c26d23a8657a630f639d17831a8870680baa7927901b597fb1e511d6ece0f17

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

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
memory/268-49-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/268-6-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download
memory/268-51-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download
memory/1664-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1664-48-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4188-38-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/4188-39-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/4188-42-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/4188-43-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-55-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-77-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-47-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-54-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-45-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-58-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-61-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-64-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-67-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-68-0x0000000000980000-0x0000000000A22000-memory.dmp

Filesize
648KB

Download
memory/5048-74-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-50-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-78-0x0000000000980000-0x0000000000A22000-memory.dmp

Filesize
648KB

Download
memory/5048-81-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-84-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-87-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-90-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-91-0x0000000000980000-0x0000000000A22000-memory.dmp

Filesize
648KB

Download
memory/5048-92-0x0000000000980000-0x0000000000A22000-memory.dmp

Filesize
648KB

Download
memory/5048-96-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download
memory/5048-99-0x0000000000400000-0x0000000000715000-memory.dmp

Filesize
3.1MB

Download

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