socks5systemz | 42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164

General

Target

42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.exe
Size

5.1MB
MD5

61c7109a0bf03ebb161b4e3eddba5a82
SHA1

c8b5b7871f85a9b79a6d0d5b3787613eaa1baaa7
SHA256

42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164
SHA512

27c4f041359f325a456b48d316a74a51a6f499141e28cff65d8070935c351161414e5ba7d320a6af7d9eb7903ac9079aad86e071b9a71f16429b70f3639d84ea
SSDEEP

98304:Cg0iRwL9Hvp2cNFeRHQ2Ss6jPlnhNqE2t7V6JlS9rTSw/mga5R+6H525akOHQxY4:fZRqxvp1NFSw86jPlnxg6JAUw/mga50L

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

aiufsom.ru

http://aiufsom.ru/search/?q=67e28dd83f5aa4794209ff1c7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa48e8889b5e4fa9281ae978a271ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ff615c9ee929e3c

http://aiufsom.ru/search/?q=67e28dd83f5aa4794209ff1c7c27d78406abdd88be4b12eab517aa5c96bd86ef9c804c895a8bbc896c58e713bc90c91d36b5281fc235a925ed3e01d6bd974a95129070b616e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7ee9c9e32cc689211

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral1/memory/540-86-0x00000000009A0000-0x0000000000A42000-memory.dmp	family_socks5systemz
behavioral1/memory/540-109-0x00000000009A0000-0x0000000000A42000-memory.dmp	family_socks5systemz
behavioral1/memory/540-110-0x00000000009A0000-0x0000000000A42000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp
1852	wavmp3splitter.exe
540	wavmp3splitter.exe

Loads dropped DLL 1 IoCs

pid	Process
1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.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	152.89.198.214

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
1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4312 wrote to memory of 1832	4312	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.exe	80
PID 4312 wrote to memory of 1832	4312	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.exe	80
PID 4312 wrote to memory of 1832	4312	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.exe	80
PID 1832 wrote to memory of 1852	1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp	81
PID 1832 wrote to memory of 1852	1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp	81
PID 1832 wrote to memory of 1852	1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp	81
PID 1832 wrote to memory of 540	1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp	82
PID 1832 wrote to memory of 540	1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp	82
PID 1832 wrote to memory of 540	1832	42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp	82

C:\Users\Admin\AppData\Local\Temp\42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.exe
"C:\Users\Admin\AppData\Local\Temp\42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4312
- C:\Users\Admin\AppData\Local\Temp\is-GU8HE.tmp\42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-GU8HE.tmp\42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp" /SL5="$60212,5072493,54272,C:\Users\Admin\AppData\Local\Temp\42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:1832
- - C:\Users\Admin\AppData\Local\Direct WAV MP3 Splitter\wavmp3splitter.exe
    "C:\Users\Admin\AppData\Local\Direct WAV MP3 Splitter\wavmp3splitter.exe" -i
    3⤵
    - Executes dropped EXE
    PID:1852
- - C:\Users\Admin\AppData\Local\Direct WAV MP3 Splitter\wavmp3splitter.exe
    "C:\Users\Admin\AppData\Local\Direct WAV MP3 Splitter\wavmp3splitter.exe" -s
    3⤵
    - Executes dropped EXE
    PID:540

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Direct WAV MP3 Splitter\wavmp3splitter.exe

Filesize
3.3MB

MD5
899fe185b3bd22efa6f0655b8bda57eb

SHA1
e16511d3704bd268211bf40cd68732bd5c3ba662

SHA256
2e87e88efba878bcc1ef9f5eee95cfb8975a523ef957b02efd55d16edf00a9a4

SHA512
f84b41d04bbc7e35f496452d9df26f4e3849a8ca5cab38ccefe4251ff3f2dc1b02e0ab46e9fcd1ee12e0994423770039bbe3c5db965d6c728f19c0d9d32f1b87

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-BR8O7.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GU8HE.tmp\42d99fbd9cd6141249a718e19374e415b92e900aac020cf9bcc2daae4194d164.tmp

Filesize
680KB

MD5
29507bceeed9430e1545cb4fe0e44e1e

SHA1
bef64c7acada5408513b18b5e5c0aa6b3616b2d3

SHA256
77cf85243df8b3373ac4b3b4d5eeb883e3c9224ceda7bb27197cf134d06a9d9b

SHA512
dc6667817a978989093cc0f409629fe13addccaee6ce7e9a010c595050e79eb2d43aad73c747c87ee93cba523fb0c297ced7824cfccb90e26695a0d17f951863

Download Submit
memory/540-96-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-80-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-117-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-114-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-110-0x00000000009A0000-0x0000000000A42000-memory.dmp

Filesize
648KB

Download
memory/540-109-0x00000000009A0000-0x0000000000A42000-memory.dmp

Filesize
648KB

Download
memory/540-108-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-68-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-105-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-102-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-71-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-74-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-77-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-99-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-83-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-86-0x00000000009A0000-0x0000000000A42000-memory.dmp

Filesize
648KB

Download
memory/540-88-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/540-93-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/1832-10-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1832-70-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1852-65-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/1852-63-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/1852-60-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/1852-59-0x0000000000400000-0x0000000000754000-memory.dmp

Filesize
3.3MB

Download
memory/4312-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4312-69-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4312-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing