systembc | 4246b1740af95e953c8010a6d99c0ab72622b892bc1dbb955eec4067d90d7763 | Triage

Analysis

max time kernel
142s
max time network
116s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
15-04-2023 08:51

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General

Target

tmp.exe
Size

283KB
MD5

373949447dfd88ce94f0d04cba6ea505
SHA1

b30b0268fa57ca3117957f99fa7372b244153306
SHA256

4246b1740af95e953c8010a6d99c0ab72622b892bc1dbb955eec4067d90d7763
SHA512

dfcdbf640ac89ae4c9efba10fe8260a4fa8354d1fd6d62f6625d0bec192dd21bb238d770d00c35a2b62d46d84f8445ffb415dd48a93023d70bac453bc50c8c88
SSDEEP

6144:J/y8+suv+onz8G+pqHxq8FNyMRn7HRGcdfMtVqgo:J/yZsvoz8G+QRq8fhN7y78

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

185.215.113.105:4001

Signatures

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

Processes:

tmp.exe

description ioc process

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

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1500 wrote to memory of 1088	1500	taskeng.exe	tmp.exe
PID 1500 wrote to memory of 1088	1500	taskeng.exe	tmp.exe
PID 1500 wrote to memory of 1088	1500	taskeng.exe	tmp.exe
PID 1500 wrote to memory of 1088	1500	taskeng.exe	tmp.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Drops file in Windows directory
PID:820

C:\Windows\system32\taskeng.exe
taskeng.exe {B8EEA0DA-3866-47D1-AD3F-000910D46EB6} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1500

C:\Users\Admin\AppData\Local\Temp\tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp.exe start
2⤵
PID:1088

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/820-57-0x00000000003A0000-0x00000000003A5000-memory.dmp

Filesize
20KB

Download
memory/820-58-0x0000000000400000-0x0000000000B3A000-memory.dmp

Filesize
7.2MB

Download
memory/1088-66-0x0000000000400000-0x0000000000B3A000-memory.dmp

Filesize
7.2MB

Download