systembc | 95abec2205afec737577b8d5f592bffa3965e4ca18922e87190866a0843aaefa | Triage

Analysis

max time kernel
150s
max time network
152s
platform
windows7_x64
resource
win7v20210408
submitted
16-06-2021 08:43

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General

Target

S5.exe
Size

191KB
MD5

691c98b8cefece16707c7b0bd354691c
SHA1

c73c7e26cfa54781676583a8cca4f670a60f4db2
SHA256

2cbcf10a8ddfd7fd306fa0440eb9dac70b9ca39770222b62af5d372446f194a7
SHA512

dcf882286ce5e2edd2b9b3faa179bad920257566d4e907e6039b4db111ead36e7b02ae8ae3213118870d2b7e24d84f0fce158f3e3e9871e958b9a4ac8b067275

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

62.113.114.79:4001

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Drops file in Windows directory 2 IoCs

Processes:

S5.exe

description ioc process

File created C:\Windows\Tasks\wow64.job S5.exe
File opened for modification C:\Windows\Tasks\wow64.job S5.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1728 wrote to memory of 1696	1728	taskeng.exe	S5.exe
PID 1728 wrote to memory of 1696	1728	taskeng.exe	S5.exe
PID 1728 wrote to memory of 1696	1728	taskeng.exe	S5.exe
PID 1728 wrote to memory of 1696	1728	taskeng.exe	S5.exe

C:\Users\Admin\AppData\Local\Temp\S5.exe
"C:\Users\Admin\AppData\Local\Temp\S5.exe"
1⤵
- Drops file in Windows directory
PID:1776

C:\Windows\system32\taskeng.exe
taskeng.exe {10D44A0E-0651-48FE-A6DF-4D81F8CD76D7} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1728

C:\Users\Admin\AppData\Local\Temp\S5.exe
C:\Users\Admin\AppData\Local\Temp\S5.exe start
2⤵
PID:1696

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/1696-62-0x0000000000000000-mapping.dmp

Download
memory/1696-65-0x0000000000400000-0x000000000049C000-memory.dmp

Filesize
624KB

Download
memory/1776-59-0x00000000001B0000-0x00000000001B5000-memory.dmp

Filesize
20KB

Download
memory/1776-60-0x0000000075C31000-0x0000000075C33000-memory.dmp

Filesize
8KB

Download
memory/1776-61-0x0000000000400000-0x000000000049C000-memory.dmp

Filesize
624KB

Download