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
298s
max time network
302s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 6 IoCs

pid	Process
2620	cxuk.exe
2684	cxuk.exe
2324	cxuk.exe
1472	cxuk.exe
396	cxuk.exe
1776	cxuk.exe

Looks up external IP address via web service 4 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
5	api.ipify.org
6	api.ipify.org
7	ip4.seeip.org
8	ip4.seeip.org

Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Proxy
T1090

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1048 set thread context of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 2620 set thread context of 2684	2620	cxuk.exe	31
PID 2324 set thread context of 1472	2324	cxuk.exe	35
PID 396 set thread context of 1776	396	cxuk.exe	37

Drops file in Windows directory 2 IoCs

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

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2200	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 1048 wrote to memory of 2200	1048	318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd.exe	28
PID 2628 wrote to memory of 2620	2628	taskeng.exe	30
PID 2628 wrote to memory of 2620	2628	taskeng.exe	30
PID 2628 wrote to memory of 2620	2628	taskeng.exe	30
PID 2628 wrote to memory of 2620	2628	taskeng.exe	30
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2620 wrote to memory of 2684	2620	cxuk.exe	31
PID 2628 wrote to memory of 2324	2628	taskeng.exe	34
PID 2628 wrote to memory of 2324	2628	taskeng.exe	34
PID 2628 wrote to memory of 2324	2628	taskeng.exe	34
PID 2628 wrote to memory of 2324	2628	taskeng.exe	34
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2324 wrote to memory of 1472	2324	cxuk.exe	35
PID 2628 wrote to memory of 396	2628	taskeng.exe	36
PID 2628 wrote to memory of 396	2628	taskeng.exe	36
PID 2628 wrote to memory of 396	2628	taskeng.exe	36
PID 2628 wrote to memory of 396	2628	taskeng.exe	36
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37
PID 396 wrote to memory of 1776	396	cxuk.exe	37

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:1048
- 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:2200

C:\Windows\system32\taskeng.exe
taskeng.exe {9C0A0746-DDC5-48FD-B833-704DFB99C239} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2628
- C:\ProgramData\xlbucd\cxuk.exe
  C:\ProgramData\xlbucd\cxuk.exe start
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2620
- - C:\ProgramData\xlbucd\cxuk.exe
    C:\ProgramData\xlbucd\cxuk.exe start
    3⤵
    - Executes dropped EXE
    PID:2684
- C:\ProgramData\xlbucd\cxuk.exe
  C:\ProgramData\xlbucd\cxuk.exe start
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\ProgramData\xlbucd\cxuk.exe
    C:\ProgramData\xlbucd\cxuk.exe start
    3⤵
    - Executes dropped EXE
    PID:1472
- C:\ProgramData\xlbucd\cxuk.exe
  C:\ProgramData\xlbucd\cxuk.exe start
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:396
- - C:\ProgramData\xlbucd\cxuk.exe
    C:\ProgramData\xlbucd\cxuk.exe start
    3⤵
    - Executes dropped EXE
    PID:1776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Proxy

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\xlbucd\cxuk.exe

Filesize
350KB

MD5
0dc61438b79668900bd081bac6109760

SHA1
2ee66fd972c2d28ad30775971ba95056951910f0

SHA256
318e0bd67ccbf40f50b848831fb2885b161e68acdfaaa0c619c79b3912af2ecd

SHA512
467b352ce6188e6126050c229cd47b526e83ef3535449c3f02b70491e159523d7cc8ebb28caab4e8d98627a22a0af1faf13b134072309dfe56ad175d18177ca7

Download Submit
memory/396-70-0x0000000000DC0000-0x0000000000EC0000-memory.dmp

Filesize
1024KB

Download
memory/1048-2-0x0000000000D50000-0x0000000000E50000-memory.dmp

Filesize
1024KB

Download
memory/1048-4-0x0000000000020000-0x000000000002A000-memory.dmp

Filesize
40KB

Download
memory/2200-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2200-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2200-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2200-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2324-41-0x0000000000D40000-0x0000000000E40000-memory.dmp

Filesize
1024KB

Download
memory/2620-21-0x0000000000D71000-0x0000000000D77000-memory.dmp

Filesize
24KB

Download
memory/2684-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download