systembc | 318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd

Resubmissions

18-04-2024 11:20

240418-nfk6macg3w 10

18-04-2024 11:20

18-04-2024 11:20

18-04-2024 11:20

18-04-2024 11:20

18-04-2024 09:59

Analysis

max time kernel
1800s
max time network
1806s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
18-04-2024 11:20

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General

Target

318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
Size

350KB
MD5

0dc61438b79668900bd081bac6109760
SHA1

2ee66fd972c2d28ad30775971ba95056951910f0
SHA256

318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd
SHA512

467b352ce6188e6126050c229cd47b526e83ef3535449c3f02b70491e159523d7cc8ebb28caab4e8d98627a22a0af1faf13b134072309dfe56ad175d18177ca7
SSDEEP

6144:RoX0oZ+rm/OV6ZH7XYuB4xpuMadbr2X3f+gOkXdhFr:Ry0xrm/h7XYuWCMaV2XWgO8hFr

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

knock0909.monster:4035

knock0909.xyz:4035

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Executes dropped EXE 4 IoCs

Processes:

doncbk.exedoncbk.exedoncbk.exedoncbk.exe

pid process

2212 doncbk.exe
2116 doncbk.exe
4308 doncbk.exe
3392 doncbk.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

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

Proxy
T1090

pid	process
2212	doncbk.exe
2116	doncbk.exe
4308	doncbk.exe
3392	doncbk.exe

flow	ioc
4	api.ipify.org
5	api.ipify.org

Suspicious use of SetThreadContext 3 IoCs

Processes:

318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exedoncbk.exedoncbk.exe

description	pid	process	target process
PID 4192 set thread context of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 2212 set thread context of 2116	2212	doncbk.exe	doncbk.exe
PID 4308 set thread context of 3392	4308	doncbk.exe	doncbk.exe

Drops file in Windows directory 2 IoCs

Processes:

318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe

description	ioc	process
File created	C:\Windows\Tasks\doncbk.job	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
File opened for modification	C:\Windows\Tasks\doncbk.job	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe

pid	process
3652	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
3652	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exedoncbk.exedoncbk.exe

description	pid	process	target process
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 4192 wrote to memory of 3652	4192	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 2212 wrote to memory of 2116	2212	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe
PID 4308 wrote to memory of 3392	4308	doncbk.exe	doncbk.exe

C:\Users\Admin\AppData\Local\Temp\318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
"C:\Users\Admin\AppData\Local\Temp\318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4192

C:\Users\Admin\AppData\Local\Temp\318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe
"C:\Users\Admin\AppData\Local\Temp\318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe"
2⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:3652

C:\ProgramData\gckr\doncbk.exe
C:\ProgramData\gckr\doncbk.exe start
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2212

C:\ProgramData\gckr\doncbk.exe
C:\ProgramData\gckr\doncbk.exe start
2⤵
- Executes dropped EXE
PID:2116

C:\ProgramData\gckr\doncbk.exe
C:\ProgramData\gckr\doncbk.exe start
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4308

C:\ProgramData\gckr\doncbk.exe
C:\ProgramData\gckr\doncbk.exe start
2⤵
- Executes dropped EXE
PID:3392

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Proxy

T1090

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\ProgramData\gckr\doncbk.exe
Filesize
350KB

MD5
0dc61438b79668900bd081bac6109760

SHA1
2ee66fd972c2d28ad30775971ba95056951910f0

SHA256
318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd

SHA512
467b352ce6188e6126050c229cd47b526e83ef3535449c3f02b70491e159523d7cc8ebb28caab4e8d98627a22a0af1faf13b134072309dfe56ad175d18177ca7

Download Submit
memory/2212-16-0x0000000000EA0000-0x0000000000FA0000-memory.dmp

Filesize
1024KB

Download
memory/3652-3-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3652-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3652-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4192-1-0x0000000000EE0000-0x0000000000FE0000-memory.dmp

Filesize
1024KB

Download
memory/4192-2-0x0000000000D50000-0x0000000000D5A000-memory.dmp

Filesize
40KB

Download
memory/4308-38-0x0000000000E60000-0x0000000000F60000-memory.dmp

Filesize
1024KB

Download