systembc | d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045

General

Target

d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe
Size

178KB
MD5

8a53ca14784db0d61dee57dbd1c38e54
SHA1

a60f41f04529432ae8e4577ba9f13bca904ab4e9
SHA256

d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045
SHA512

3947f8df002b02e7d5ee9df07d1fd93e7f8bf322d91f99a4069480498d61b3f42718790d7ec93100a29257339d1f9e2d61e0a98740b5a05fa5e994c280b868d8

Score

10^/10

systembc suricata trojan

Malware Config

Extracted

Family

systembc

C2

sdadvert197.com:4044

mexstat128.com:4044

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query
suricata: ET MALWARE Observed SystemBC CnC Domain in DNS Query
suricata
Executes dropped EXE 1 IoCs

Processes:

tjxwqlc.exe

pid process

1968 tjxwqlc.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.

Processes:

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.

Connection Proxy
T1090

pid	process
1968	tjxwqlc.exe

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

Drops file in Windows directory 2 IoCs

Processes:

d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe

description	ioc	process
File opened for modification	C:\Windows\Tasks\tjxwqlc.job	d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe
File created	C:\Windows\Tasks\tjxwqlc.job	d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe

pid process

2028 d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe

pid	process
2028	d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 2024 wrote to memory of 1968	2024	taskeng.exe	tjxwqlc.exe
PID 2024 wrote to memory of 1968	2024	taskeng.exe	tjxwqlc.exe
PID 2024 wrote to memory of 1968	2024	taskeng.exe	tjxwqlc.exe
PID 2024 wrote to memory of 1968	2024	taskeng.exe	tjxwqlc.exe

C:\Users\Admin\AppData\Local\Temp\d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe
"C:\Users\Admin\AppData\Local\Temp\d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:2028

C:\Windows\system32\taskeng.exe
taskeng.exe {52F86EB3-8051-4938-9171-6A4FB54AE957} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2024

C:\ProgramData\wpsdq\tjxwqlc.exe
C:\ProgramData\wpsdq\tjxwqlc.exe start
2⤵
- Executes dropped EXE
PID:1968

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Connection Proxy

1

T1090

Impact

Replay Monitor

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Downloads

C:\ProgramData\wpsdq\tjxwqlc.exe
Filesize
178KB

MD5
8a53ca14784db0d61dee57dbd1c38e54

SHA1
a60f41f04529432ae8e4577ba9f13bca904ab4e9

SHA256
d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045

SHA512
3947f8df002b02e7d5ee9df07d1fd93e7f8bf322d91f99a4069480498d61b3f42718790d7ec93100a29257339d1f9e2d61e0a98740b5a05fa5e994c280b868d8

Download Submit
C:\ProgramData\wpsdq\tjxwqlc.exe
Filesize
178KB

MD5
8a53ca14784db0d61dee57dbd1c38e54

SHA1
a60f41f04529432ae8e4577ba9f13bca904ab4e9

SHA256
d7588ed746eb3b1ef4b5ac9507d8e432174eba3b4638df6e1497ed45caecd045

SHA512
3947f8df002b02e7d5ee9df07d1fd93e7f8bf322d91f99a4069480498d61b3f42718790d7ec93100a29257339d1f9e2d61e0a98740b5a05fa5e994c280b868d8

Download Submit
memory/1968-59-0x0000000000000000-mapping.dmp

Download
memory/1968-62-0x0000000004E5B000-0x0000000004E61000-memory.dmp

Filesize
24KB

Download
memory/1968-63-0x0000000000400000-0x0000000004DA8000-memory.dmp

Filesize
73.7MB

Download
memory/2028-54-0x0000000076C81000-0x0000000076C83000-memory.dmp

Filesize
8KB

Download
memory/2028-56-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/2028-55-0x0000000004F5B000-0x0000000004F62000-memory.dmp

Filesize
28KB

Download
memory/2028-57-0x0000000000400000-0x0000000004DA8000-memory.dmp

Filesize
73.7MB

Download

Analysis

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