socks5systemz | 85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1

General

Target

85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.exe
Size

5.4MB
MD5

2ad5f8bc67541add3ccc07121ec13beb
SHA1

56a71adb6608a5c56e50ca40f0341e9f1e107bdd
SHA256

85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1
SHA512

b6005474db80e4d4da9b75a02f8439c3023ee7c1e6611eda449441a05ac93226893b5d2ef734bf6ac0b4c0dca016a0943e16634c173638c0ddc98c6fe1d5f7d2
SSDEEP

98304:Czy3Xpae/yZS09c+3Gkqmdt15oEuFKo9DUGfuO1vBlkGfnJOdlQZ5QxAN:ewaeIS0e+1vXEKcuCjkkJOfy5Qy

Score

10^/10

Malware Config

Signatures

Detect Socks5Systemz Payload 3 IoCs

resource	yara_rule
behavioral2/memory/3744-189-0x0000000000970000-0x0000000000A12000-memory.dmp	family_socks5systemz
behavioral2/memory/3744-213-0x0000000000970000-0x0000000000A12000-memory.dmp	family_socks5systemz
behavioral2/memory/3744-214-0x0000000000970000-0x0000000000A12000-memory.dmp	family_socks5systemz

Socks5Systemz
Socks5Systemz is a botnet written in C++.
botnet socks5systemz
Socks5systemz family
socks5systemz

Executes dropped EXE 2 IoCs

pid	Process
1380	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp
3744	avitb32.exe

Loads dropped DLL 1 IoCs

pid	Process
1380	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.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

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	avitb32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1380	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 1380	5000	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.exe	86
PID 5000 wrote to memory of 1380	5000	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.exe	86
PID 5000 wrote to memory of 1380	5000	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.exe	86
PID 1380 wrote to memory of 3744	1380	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp	88
PID 1380 wrote to memory of 3744	1380	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp	88
PID 1380 wrote to memory of 3744	1380	85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp	88

C:\Users\Admin\AppData\Local\Temp\85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.exe
"C:\Users\Admin\AppData\Local\Temp\85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Users\Admin\AppData\Local\Temp\is-UV5EU.tmp\85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-UV5EU.tmp\85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp" /SL5="$6020E,5400761,54272,C:\Users\Admin\AppData\Local\Temp\85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:1380
- - C:\Users\Admin\AppData\Local\AVIToolbox 4.20\avitb32.exe
    "C:\Users\Admin\AppData\Local\AVIToolbox 4.20\avitb32.exe" -i
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3744

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\AVIToolbox 4.20\avitb32.exe

Filesize
2.6MB

MD5
3b14b1011e9b71fc4fd920a35b850962

SHA1
040082c79ce0b7c949bf14c519164c04f222bbf7

SHA256
25746ef23ed159ff271912673151a290248f70387c66c87744c7c70aadcf277c

SHA512
ac97d7d0c32ddf335b654f4a4d8bb10cefa42020f18781b58a168fccf99ae104a1abb2f52f937dc0236eb3ba303d913fd07ce55011af3fef0b6d14ef46340b17

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-PS5LN.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-UV5EU.tmp\85227b47c15407d24e6b8498c604f1cc74f26e6eb9461fc41532551842cd4fa1.tmp

Filesize
680KB

MD5
39d9ebbb199d483238fa2c3816153961

SHA1
1533da2bb5d1ef294d894b86857e2179c201bf8e

SHA256
029aa6da02d2f755b2ae8d32dad7c892763ffb65f239968158559aa43888a687

SHA512
7d02f76f4cede4077ea70ace697cd03e4686c14d45b8613b9326df7fe5ea54c5c0a18aa24a4ebf3968296a688686c619a6cd856a3d89eea9fab3ebf9802a5119

Download Submit
memory/1380-169-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1380-10-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/3744-179-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-190-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-165-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-168-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-221-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-218-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-172-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-173-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-176-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-214-0x0000000000970000-0x0000000000A12000-memory.dmp

Filesize
648KB

Download
memory/3744-182-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-185-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-189-0x0000000000970000-0x0000000000A12000-memory.dmp

Filesize
648KB

Download
memory/3744-164-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-196-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-199-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-200-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-203-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-206-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-209-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-212-0x0000000000400000-0x00000000006AD000-memory.dmp

Filesize
2.7MB

Download
memory/3744-213-0x0000000000970000-0x0000000000A12000-memory.dmp

Filesize
648KB

Download
memory/5000-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5000-170-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5000-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download

Analysis

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