systembc | 3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9

Analysis

max time kernel
164s
max time network
43s
platform
windows7_x64
resource
win7-20220414-en
submitted
19-04-2022 06:09

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General

Target

3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe
Size

264KB
MD5

05206e5eda097f54b8b1bcf23891ad80
SHA1

2325f3f2a146432526208e733718dff80a65e86e
SHA256

3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9
SHA512

df1a8558357d4b7aa9b812f5f078fa6dc00584c3b5413ea13087cb5d156f3b5d202d56a50925860dd00ebb7d4c6108d100384f68638b07415e5e569282e32879

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

172.104.63.157:4001

Signatures

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

Processes:

cvxn.exe

pid process

2032 cvxn.exe

pid	process
2032	cvxn.exe

Drops file in Windows directory 2 IoCs

Processes:

3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe

description	ioc	process
File created	C:\Windows\Tasks\cvxn.job	3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe
File opened for modification	C:\Windows\Tasks\cvxn.job	3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe

pid process

964 3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe

pid	process
964	3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1224 wrote to memory of 2032	1224	taskeng.exe	cvxn.exe
PID 1224 wrote to memory of 2032	1224	taskeng.exe	cvxn.exe
PID 1224 wrote to memory of 2032	1224	taskeng.exe	cvxn.exe
PID 1224 wrote to memory of 2032	1224	taskeng.exe	cvxn.exe

C:\Users\Admin\AppData\Local\Temp\3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe
"C:\Users\Admin\AppData\Local\Temp\3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:964

C:\Windows\system32\taskeng.exe
taskeng.exe {76699236-F41B-471E-AEE6-27221BE7FFA3} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1224

C:\ProgramData\bnjoqmx\cvxn.exe
C:\ProgramData\bnjoqmx\cvxn.exe start
2⤵
- Executes dropped EXE
PID:2032

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\ProgramData\bnjoqmx\cvxn.exe
Filesize
264KB

MD5
05206e5eda097f54b8b1bcf23891ad80

SHA1
2325f3f2a146432526208e733718dff80a65e86e

SHA256
3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9

SHA512
df1a8558357d4b7aa9b812f5f078fa6dc00584c3b5413ea13087cb5d156f3b5d202d56a50925860dd00ebb7d4c6108d100384f68638b07415e5e569282e32879

Download Submit
C:\ProgramData\bnjoqmx\cvxn.exe
Filesize
264KB

MD5
05206e5eda097f54b8b1bcf23891ad80

SHA1
2325f3f2a146432526208e733718dff80a65e86e

SHA256
3ef8f893bfba60ce3d400e7437856b813fcf69b24a1c37848963d052ecd0d9f9

SHA512
df1a8558357d4b7aa9b812f5f078fa6dc00584c3b5413ea13087cb5d156f3b5d202d56a50925860dd00ebb7d4c6108d100384f68638b07415e5e569282e32879

Download Submit
memory/964-54-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/964-55-0x0000000076451000-0x0000000076453000-memory.dmp

Filesize
8KB

Download
memory/964-57-0x0000000000400000-0x0000000000461000-memory.dmp

Filesize
388KB

Download
memory/964-56-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2032-59-0x0000000000000000-mapping.dmp

Download