systembc | 8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a

General

Target

8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe
Size

203KB
MD5

40bd21b534a875137016dd1c93407366
SHA1

941dcff9464e407c060051475758f84e80998417
SHA256

8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a
SHA512

e5466a0c3b4e1c74192ee2db85bf3809904687934b6e2ffb2a1469b8f6510d03d80c948b364a67ed43fd4f753b29355dcb3252ecc073bca21e2880b4254ab31e

Score

10^/10

systembc suricata trojan

Malware Config

Extracted

Family

systembc

C2

sdadvert197.com:4044

mexstat128.com:4044

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query
suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query
suricata
Executes dropped EXE 1 IoCs

Processes:

bhuqb.exe

pid process

620 bhuqb.exe
Looks up external IP address via web service 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

5 api.ipify.org
6 ip4.seeip.org
7 ip4.seeip.org
4 api.ipify.org
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Connection Proxy
T1090

pid	process
620	bhuqb.exe

flow	ioc
5	api.ipify.org
6	ip4.seeip.org
7	ip4.seeip.org
4	api.ipify.org

Drops file in Windows directory 2 IoCs

Processes:

8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe

description	ioc	process
File opened for modification	C:\Windows\Tasks\bhuqb.job	8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe
File created	C:\Windows\Tasks\bhuqb.job	8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe

pid process

2024 8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe

pid	process
2024	8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1672 wrote to memory of 620	1672	taskeng.exe	bhuqb.exe
PID 1672 wrote to memory of 620	1672	taskeng.exe	bhuqb.exe
PID 1672 wrote to memory of 620	1672	taskeng.exe	bhuqb.exe
PID 1672 wrote to memory of 620	1672	taskeng.exe	bhuqb.exe

C:\Users\Admin\AppData\Local\Temp\8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe
"C:\Users\Admin\AppData\Local\Temp\8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:2024

C:\Windows\system32\taskeng.exe
taskeng.exe {46AACDE0-CFB8-45EA-A84F-8D22EC209F49} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1672

C:\ProgramData\owtpcf\bhuqb.exe
C:\ProgramData\owtpcf\bhuqb.exe start
2⤵
- Executes dropped EXE
PID:620

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Connection Proxy

1

T1090

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Connection Proxy

1

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\owtpcf\bhuqb.exe
Filesize
203KB

MD5
40bd21b534a875137016dd1c93407366

SHA1
941dcff9464e407c060051475758f84e80998417

SHA256
8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a

SHA512
e5466a0c3b4e1c74192ee2db85bf3809904687934b6e2ffb2a1469b8f6510d03d80c948b364a67ed43fd4f753b29355dcb3252ecc073bca21e2880b4254ab31e

Download Submit
C:\ProgramData\owtpcf\bhuqb.exe
Filesize
203KB

MD5
40bd21b534a875137016dd1c93407366

SHA1
941dcff9464e407c060051475758f84e80998417

SHA256
8e19fd66ec247a6ef30b5596bcf5ab7d615a12f0a79739117c1c88112c43968a

SHA512
e5466a0c3b4e1c74192ee2db85bf3809904687934b6e2ffb2a1469b8f6510d03d80c948b364a67ed43fd4f753b29355dcb3252ecc073bca21e2880b4254ab31e

Download Submit
memory/620-60-0x0000000000000000-mapping.dmp

Download
memory/620-62-0x000000000030A000-0x0000000000310000-memory.dmp

Filesize
24KB

Download
memory/620-64-0x000000000030A000-0x0000000000310000-memory.dmp

Filesize
24KB

Download
memory/620-65-0x0000000000400000-0x00000000022EF000-memory.dmp

Filesize
30.9MB

Download
memory/2024-54-0x000000000242A000-0x0000000002430000-memory.dmp

Filesize
24KB

Download
memory/2024-55-0x0000000076011000-0x0000000076013000-memory.dmp

Filesize
8KB

Download
memory/2024-57-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/2024-56-0x000000000242A000-0x0000000002430000-memory.dmp

Filesize
24KB

Download
memory/2024-58-0x0000000000400000-0x00000000022EF000-memory.dmp

Filesize
30.9MB

Download

Analysis

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