systembc | 5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db

General

Target

5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe
Size

128KB
MD5

8b462afe450df7f333a7da76f731cb62
SHA1

73e532ebfbd033039575b5457ac7023f920741fe
SHA256

5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db
SHA512

2c4029871f2efa811b4cf17e1b55e273254716c01302de5f1489ec9ecc1342b58de929fac043f4f3b6720c1170c59e549540e626d46087bc687991b98256c3cd

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:

fisxd.exe

pid process

1952 fisxd.exe
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

49 api.ipify.org
50 api.ipify.org
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Connection Proxy
T1090

pid	process
1952	fisxd.exe

flow	ioc
49	api.ipify.org
50	api.ipify.org

Drops file in Windows directory 2 IoCs

Processes:

5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe

description	ioc	process
File created	C:\Windows\Tasks\fisxd.job	5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe
File opened for modification	C:\Windows\Tasks\fisxd.job	5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3228 4308 WerFault.exe 5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe

pid	pid_target	process	target process
3228	4308	WerFault.exe	5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe

pid	process
4308	5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe
4308	5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe

C:\Users\Admin\AppData\Local\Temp\5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe
"C:\Users\Admin\AppData\Local\Temp\5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:4308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4308 -s 484
2⤵
- Program crash
PID:3228

C:\ProgramData\anvao\fisxd.exe
C:\ProgramData\anvao\fisxd.exe start
1⤵
- Executes dropped EXE
PID:1952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4308 -ip 4308
1⤵
PID:3284

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Connection Proxy

1

T1090

Impact

Replay Monitor

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Downloads

C:\ProgramData\anvao\fisxd.exe
Filesize
128KB

MD5
8b462afe450df7f333a7da76f731cb62

SHA1
73e532ebfbd033039575b5457ac7023f920741fe

SHA256
5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db

SHA512
2c4029871f2efa811b4cf17e1b55e273254716c01302de5f1489ec9ecc1342b58de929fac043f4f3b6720c1170c59e549540e626d46087bc687991b98256c3cd

Download Submit
C:\ProgramData\anvao\fisxd.exe
Filesize
128KB

MD5
8b462afe450df7f333a7da76f731cb62

SHA1
73e532ebfbd033039575b5457ac7023f920741fe

SHA256
5e27c0fcfbf3bbabdcac743b1d948f88560cbe30ffb8f45beb062d555fd7c3db

SHA512
2c4029871f2efa811b4cf17e1b55e273254716c01302de5f1489ec9ecc1342b58de929fac043f4f3b6720c1170c59e549540e626d46087bc687991b98256c3cd

Download Submit
memory/1952-135-0x0000000003033000-0x0000000003039000-memory.dmp

Filesize
24KB

Download
memory/1952-136-0x0000000003120000-0x0000000003129000-memory.dmp

Filesize
36KB

Download
memory/1952-137-0x0000000000400000-0x0000000002FAB000-memory.dmp

Filesize
43.7MB

Download
memory/4308-130-0x0000000003028000-0x000000000302E000-memory.dmp

Filesize
24KB

Download
memory/4308-131-0x0000000004BA0000-0x0000000004BA9000-memory.dmp

Filesize
36KB

Download
memory/4308-132-0x0000000000400000-0x0000000002FAB000-memory.dmp

Filesize
43.7MB

Download

Analysis

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