socks5systemz | 9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72

General

Target

9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.exe
Size

4.6MB
MD5

5582a52514665170d3db11c81a384c1b
SHA1

3a06dda16ea0ae4173bad13887af60e9b2129ce6
SHA256

9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72
SHA512

e0b9bc61bb9cfc82d6531109e75a337dd3131c706c99e006d6bfd4c3a3258fd259e6b1292fb8d1f2257ce0ff274c899cddaecd6019c0411ced11e7a7116d76d4
SSDEEP

98304:mg+xeHxB9bXs6+ZmXY3dWb1cic6+OcS+xWPIkfbj4fWo4ndjV0oIJrC0lyS:QUHPlgmodW2i1I/9kzdtVX+CUF

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

bwkeasr.com

http://bwkeasr.com/search/?q=67e28dd83e5cfa2f440afa1d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a471ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ff818c1e99d9932

http://bwkeasr.com/search/?q=67e28dd83e5cfa2f440afa1d7c27d78406abdd88be4b12eab517aa5c96bd86ef928248875a8bbc896c58e713bc90c91936b5281fc235a925ed3e07d6bd974a95129070b616e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7ee92933acb67951f

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1048-86-0x00000000028F0000-0x0000000002992000-memory.dmp	family_socks5systemz
behavioral1/memory/1048-110-0x00000000028F0000-0x0000000002992000-memory.dmp	family_socks5systemz
behavioral1/memory/1048-111-0x00000000028F0000-0x0000000002992000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp
3668	virtualsoundcard.exe
1048	virtualsoundcard.exe

Loads dropped DLL 1 IoCs

pid	Process
4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.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	141.98.234.31

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
4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 4988	3048	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.exe	82
PID 3048 wrote to memory of 4988	3048	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.exe	82
PID 3048 wrote to memory of 4988	3048	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.exe	82
PID 4988 wrote to memory of 3668	4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp	86
PID 4988 wrote to memory of 3668	4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp	86
PID 4988 wrote to memory of 3668	4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp	86
PID 4988 wrote to memory of 1048	4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp	87
PID 4988 wrote to memory of 1048	4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp	87
PID 4988 wrote to memory of 1048	4988	9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp	87

C:\Users\Admin\AppData\Local\Temp\9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.exe
"C:\Users\Admin\AppData\Local\Temp\9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3048
- C:\Users\Admin\AppData\Local\Temp\is-G5DEI.tmp\9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-G5DEI.tmp\9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp" /SL5="$A00A2,4592859,54272,C:\Users\Admin\AppData\Local\Temp\9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:4988
- - C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
    "C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe" -i
    3⤵
    - Executes dropped EXE
    PID:3668
- - C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
    "C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe" -s
    3⤵
    - Executes dropped EXE
    PID:1048

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\Temp\is-G5DEI.tmp\9c39d61a7daea8eda91dc21808377ba47f575443ba7593f298545388aa142e72.tmp

Filesize
680KB

MD5
94ebd7c7c5adcf2267929fba503116d5

SHA1
e7bd7046fc47d6d80e6817580fcd5aff9e198828

SHA256
f9af6cca41dec59fbcd3a34f5b5f896d426d8aa174398bfd6be6020e10c8f7ed

SHA512
de6874a3a0ab12aad2713c6363b561e4a709766ce4e139bba91fd420b6151254c8b1451a8d368f3dba076d639f53cd7e7860ede9c192a2e71c11c310afc6daad

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-USIA9.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe

Filesize
2.6MB

MD5
ac1696fc666d2c09cce023776647f6d5

SHA1
c2f515f2229899232e315cadc596dace68f61969

SHA256
fed82d1c4e53f16ee8936aa53e0cf317539bfb627799c59cb62d89357da6018f

SHA512
6a45b8fedae6b82fbffee1cba1aad99818e0d9fd32f4eca1c85777aeee0854bc70bafbc279f3754418a80f36cf0f9bf9390a2ded0a570e07f323f7caf79e4300

Download Submit
memory/1048-97-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-80-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-118-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-115-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-111-0x00000000028F0000-0x0000000002992000-memory.dmp

Filesize
648KB

Download
memory/1048-110-0x00000000028F0000-0x0000000002992000-memory.dmp

Filesize
648KB

Download
memory/1048-109-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-68-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-106-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-103-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-71-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-74-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-77-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-100-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-83-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-86-0x00000000028F0000-0x0000000002992000-memory.dmp

Filesize
648KB

Download
memory/1048-89-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/1048-94-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/3048-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3048-69-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3048-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/3668-64-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/3668-65-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/3668-60-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/3668-59-0x0000000000400000-0x00000000006A6000-memory.dmp

Filesize
2.6MB

Download
memory/4988-16-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/4988-70-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download

Analysis

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