systembc | 17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55

General

Target

17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe
Size

90KB
MD5

50b7c39b62eed16c581f6f2d8b7f65fe
SHA1

462a4116dacd8e41e07a97c2e034653deba7eaba
SHA256

17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55
SHA512

b4e5f2ae8bae802fb9b0c1dd1ca5f1e62516927a28d5bf7921b9e7e2f0e91a1605b5cd359a51226a166f6df5caddb04f2cc155a2b7751411e5740e14fcefe7d9

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

23hfdne.com:4035

23hfdne.xyz:4035

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Executes dropped EXE 1 IoCs

Processes:

rnrj.exe

pid process

1004 rnrj.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

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

Connection Proxy
T1090

pid	process
1004	rnrj.exe

flow	ioc
10	api.ipify.org
9	api.ipify.org

Drops file in Windows directory 2 IoCs

Processes:

17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe

description	ioc	process
File created	C:\Windows\Tasks\rnrj.job	17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe
File opened for modification	C:\Windows\Tasks\rnrj.job	17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2484 1476 WerFault.exe 17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe

pid	pid_target	process	target process
2484	1476	WerFault.exe	17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe

pid	process
1476	17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe
1476	17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe

C:\Users\Admin\AppData\Local\Temp\17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe
"C:\Users\Admin\AppData\Local\Temp\17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 932
  2⤵
  - Program crash
  PID:2484

C:\ProgramData\iwfdrv\rnrj.exe
C:\ProgramData\iwfdrv\rnrj.exe start
1⤵
- Executes dropped EXE
PID:1004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 200 -p 1476 -ip 1476
1⤵
PID:1280

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

Loading Replay Monitor...

Downloads

C:\ProgramData\iwfdrv\rnrj.exe

Filesize
90KB

MD5
50b7c39b62eed16c581f6f2d8b7f65fe

SHA1
462a4116dacd8e41e07a97c2e034653deba7eaba

SHA256
17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55

SHA512
b4e5f2ae8bae802fb9b0c1dd1ca5f1e62516927a28d5bf7921b9e7e2f0e91a1605b5cd359a51226a166f6df5caddb04f2cc155a2b7751411e5740e14fcefe7d9

Download Submit
C:\ProgramData\iwfdrv\rnrj.exe

Filesize
90KB

MD5
50b7c39b62eed16c581f6f2d8b7f65fe

SHA1
462a4116dacd8e41e07a97c2e034653deba7eaba

SHA256
17afe1971ecfe1ba3fb63253a5aa773106ce132395d70e92f9f2227d85cd9c55

SHA512
b4e5f2ae8bae802fb9b0c1dd1ca5f1e62516927a28d5bf7921b9e7e2f0e91a1605b5cd359a51226a166f6df5caddb04f2cc155a2b7751411e5740e14fcefe7d9

Download Submit
memory/1004-137-0x00000000004E0000-0x00000000005E0000-memory.dmp

Filesize
1024KB

Download
memory/1004-138-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/1476-130-0x0000000000868000-0x000000000086F000-memory.dmp

Filesize
28KB

Download
memory/1476-131-0x0000000000868000-0x000000000086F000-memory.dmp

Filesize
28KB

Download
memory/1476-132-0x0000000000660000-0x0000000000669000-memory.dmp

Filesize
36KB

Download
memory/1476-133-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download

Analysis

Sharing