socks5systemz | fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861

General

Target

fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe
Size

4.7MB
MD5

f9cfd8f9afb7ee87e7ad049b7a92423f
SHA1

cf336b758b82d17f8be83a5d93c7d5aebd0e4638
SHA256

fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861
SHA512

388ca19270ca8addf4e93d4ab9c3225cdefba6afaf0061d11030f09c57fc0372e5b1bb86f9d5cb902354a4d13d8afffec3e073ac6027fdc4ea6d15e2d8f9fcac
SSDEEP

98304:mMX40drbC2Z+oMvtyIGM1ONsQNaMZE8Q0jEy0mKPrM/cqPFyvH66:5/Fn0FJzONfeNy9Y80x

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

C2

aavqusd.ru

http://aavqusd.ru/search/?q=67e28dd83e5cfa2f440afa1d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a471ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ff819c7ed939f3b

http://aavqusd.ru/search/?q=67e28dd83e5cfa2f440afa1d7c27d78406abdd88be4b12eab517aa5c96bd86ef928248875a8bbc896c58e713bc90c91936b5281fc235a925ed3e07d6bd974a95129070b616e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7ee92923ccf699316

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral1/memory/4172-87-0x00000000008C0000-0x0000000000962000-memory.dmp	family_socks5systemz
behavioral1/memory/4172-110-0x00000000008C0000-0x0000000000962000-memory.dmp	family_socks5systemz
behavioral1/memory/4172-111-0x00000000008C0000-0x0000000000962000-memory.dmp	family_socks5systemz

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

Executes dropped EXE 3 IoCs

pid	Process
4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp
2080	lesserextent32.exe
4172	lesserextent32.exe

Loads dropped DLL 1 IoCs

pid	Process
4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.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 FindShellTrayWindow 1 IoCs

pid	Process
4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2576 wrote to memory of 4648	2576	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe	81
PID 2576 wrote to memory of 4648	2576	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe	81
PID 2576 wrote to memory of 4648	2576	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe	81
PID 4648 wrote to memory of 2080	4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp	84
PID 4648 wrote to memory of 2080	4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp	84
PID 4648 wrote to memory of 2080	4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp	84
PID 4648 wrote to memory of 4172	4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp	86
PID 4648 wrote to memory of 4172	4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp	86
PID 4648 wrote to memory of 4172	4648	fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp	86

C:\Users\Admin\AppData\Local\Temp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe
"C:\Users\Admin\AppData\Local\Temp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2576
- C:\Users\Admin\AppData\Local\Temp\is-JREVL.tmp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-JREVL.tmp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp" /SL5="$601EA,4696942,54272,C:\Users\Admin\AppData\Local\Temp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:4648
- - C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
    "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i
    3⤵
    - Executes dropped EXE
    PID:2080
- - C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
    "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s
    3⤵
    - Executes dropped EXE
    PID:4172

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\Lesser Extent\lesserextent32.exe

Filesize
2.8MB

MD5
194d5f3439c81fec196f54abd9c2073a

SHA1
6afb33b612e1ae4b21d78809e6c8ca0ab32624f0

SHA256
6822f5450afe2c2622ebd989deb746a6f5f7a8f8278ddf7889d584700031d6e1

SHA512
99598bda27e248e304472490e70a146c83a515258844948c847df1b26e1efbbf894e38299cade6e5bd64909252ade9ca16101b30cbb3b1ce716a4b20c5fcf9c8

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-0E32Q.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-JREVL.tmp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp

Filesize
680KB

MD5
dff4f58a01a8e88e4a2f821ca761d901

SHA1
e67e24669220213f895b68c0d662b02b03469b4a

SHA256
91b049634c65dbe18368e1f2ead4ae48f62b92fdfcd119ccea0919b68bf56e76

SHA512
049cebaa8bc30f2b7b90a49f6022271247fab2a3bc0fd2e9f36d1f27e0c37926f00deedd92b5d85a8b34f2f6e9b59ee3b7e12510cfa720935a86ba820132817a

Download Submit
memory/2080-59-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/2080-60-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/2080-64-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/2576-68-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2576-3-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/2576-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4172-74-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-94-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-118-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-70-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-73-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-115-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-77-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-80-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-83-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-87-0x00000000008C0000-0x0000000000962000-memory.dmp

Filesize
648KB

Download
memory/4172-88-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-67-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-97-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-100-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-103-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-106-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-109-0x0000000000400000-0x00000000006C5000-memory.dmp

Filesize
2.8MB

Download
memory/4172-110-0x00000000008C0000-0x0000000000962000-memory.dmp

Filesize
648KB

Download
memory/4172-111-0x00000000008C0000-0x0000000000962000-memory.dmp

Filesize
648KB

Download
memory/4648-10-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/4648-69-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download

Analysis

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