systembc | 9ab42dd0edbb92405904350c550525878312858405e737c7414025dab5981c80

Resubmissions

15/04/2024, 11:19

240415-nfa1nada96 10

10/04/2024, 03:13

10/04/2024, 03:12

10/04/2024, 03:12

10/04/2024, 03:12

22/12/2023, 00:59

Analysis

max time kernel
142s
max time network
146s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
15/04/2024, 11:19

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General

Target

3e58382005322606bd6ae12da2f209b1.exe
Size

209KB
MD5

3e58382005322606bd6ae12da2f209b1
SHA1

0afab0c2514061f3d341f720705e54aad4a4f36e
SHA256

9ab42dd0edbb92405904350c550525878312858405e737c7414025dab5981c80
SHA512

13c8df1f07d1584cc827fcc78b691cac78e7cd95ad0e2578974acb9bd8b0c2770d410d743fdc84ffa4c1a431ebe05772715d6bd57489abb7dc249b43b241c1ee
SSDEEP

6144:YDnLgI91y1UkT57iJz/DpURWPSvHuUiYphu1UR:cnLh9yn52rpUR5vHuRYpM+R

Score

10^/10

systembc trojan upx

Malware Config

Extracted

Family

systembc

yan0212.com:4039

yan0212.net:4039

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc

Executes dropped EXE 1 IoCs

pid	Process
2660	wxwt.exe

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x000d00000001231c-6.dat	upx

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

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\wxwt.job	3e58382005322606bd6ae12da2f209b1.exe
File opened for modification	C:\Windows\Tasks\wxwt.job	3e58382005322606bd6ae12da2f209b1.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2744	3e58382005322606bd6ae12da2f209b1.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2920 wrote to memory of 2660	2920	taskeng.exe	29
PID 2920 wrote to memory of 2660	2920	taskeng.exe	29
PID 2920 wrote to memory of 2660	2920	taskeng.exe	29
PID 2920 wrote to memory of 2660	2920	taskeng.exe	29

C:\Users\Admin\AppData\Local\Temp\3e58382005322606bd6ae12da2f209b1.exe
"C:\Users\Admin\AppData\Local\Temp\3e58382005322606bd6ae12da2f209b1.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:2744

C:\Windows\system32\taskeng.exe
taskeng.exe {242EC31B-0357-4FF0-A364-0FE80B0386D5} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2920
- C:\ProgramData\bpdpqf\wxwt.exe
  C:\ProgramData\bpdpqf\wxwt.exe start
  2⤵
  - Executes dropped EXE
  PID:2660

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\bpdpqf\wxwt.exe

Filesize
209KB

MD5
3e58382005322606bd6ae12da2f209b1

SHA1
0afab0c2514061f3d341f720705e54aad4a4f36e

SHA256
9ab42dd0edbb92405904350c550525878312858405e737c7414025dab5981c80

SHA512
13c8df1f07d1584cc827fcc78b691cac78e7cd95ad0e2578974acb9bd8b0c2770d410d743fdc84ffa4c1a431ebe05772715d6bd57489abb7dc249b43b241c1ee

Download Submit
memory/2660-10-0x0000000004710000-0x0000000004810000-memory.dmp

Filesize
1024KB

Download
memory/2660-11-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/2660-13-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/2660-17-0x0000000004710000-0x0000000004810000-memory.dmp

Filesize
1024KB

Download
memory/2744-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

Filesize
1024KB

Download
memory/2744-2-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/2744-9-0x0000000000400000-0x00000000045F0000-memory.dmp

Filesize
65.9MB

Download
memory/2744-14-0x00000000002F0000-0x00000000003F0000-memory.dmp

Filesize
1024KB

Download