systembc | af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd

General

Target

af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe
Size

253KB
MD5

9cd154556bc65d6fe2007074790248f7
SHA1

7340996d675919b7212134457b425923eb42563e
SHA256

af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd
SHA512

e2d55fcd373b5768023638a1e0ad3229710a75034c7acfd0896279ad716a72c1d51bd01710c4baba6be7b6919eb93c251de7632e7d258e95648a878099dd2c3a

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:

eaoftk.exe

pid process

1172 eaoftk.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

7 ip4.seeip.org
8 ip4.seeip.org
5 api.ipify.org
6 api.ipify.org
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Connection Proxy
T1090

pid	process
1172	eaoftk.exe

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

Drops file in Windows directory 2 IoCs

Processes:

af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe

description	ioc	process
File created	C:\Windows\Tasks\eaoftk.job	af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe
File opened for modification	C:\Windows\Tasks\eaoftk.job	af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe

pid process

1492 af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe

pid	process
1492	af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1348 wrote to memory of 1172	1348	taskeng.exe	eaoftk.exe
PID 1348 wrote to memory of 1172	1348	taskeng.exe	eaoftk.exe
PID 1348 wrote to memory of 1172	1348	taskeng.exe	eaoftk.exe
PID 1348 wrote to memory of 1172	1348	taskeng.exe	eaoftk.exe

C:\Users\Admin\AppData\Local\Temp\af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe
"C:\Users\Admin\AppData\Local\Temp\af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1492

C:\Windows\system32\taskeng.exe
taskeng.exe {E54A6AA1-FDEA-4BAC-912C-6C5B11D8A382} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1348

C:\ProgramData\uicxtj\eaoftk.exe
C:\ProgramData\uicxtj\eaoftk.exe start
2⤵
- Executes dropped EXE
PID:1172

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Connection Proxy

1

T1090

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Connection Proxy

1

T1090

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\uicxtj\eaoftk.exe
Filesize
253KB

MD5
9cd154556bc65d6fe2007074790248f7

SHA1
7340996d675919b7212134457b425923eb42563e

SHA256
af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd

SHA512
e2d55fcd373b5768023638a1e0ad3229710a75034c7acfd0896279ad716a72c1d51bd01710c4baba6be7b6919eb93c251de7632e7d258e95648a878099dd2c3a

Download Submit
C:\ProgramData\uicxtj\eaoftk.exe
Filesize
253KB

MD5
9cd154556bc65d6fe2007074790248f7

SHA1
7340996d675919b7212134457b425923eb42563e

SHA256
af35b29f584f06fefbdb9f25bf0dd3679661e449bd3a9e7f282906b27ea517dd

SHA512
e2d55fcd373b5768023638a1e0ad3229710a75034c7acfd0896279ad716a72c1d51bd01710c4baba6be7b6919eb93c251de7632e7d258e95648a878099dd2c3a

Download Submit
memory/1172-60-0x0000000000000000-mapping.dmp

Download
memory/1172-62-0x00000000023D4000-0x00000000023DA000-memory.dmp

Filesize
24KB

Download
memory/1172-65-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/1172-64-0x00000000023D4000-0x00000000023DA000-memory.dmp

Filesize
24KB

Download
memory/1172-66-0x0000000000400000-0x00000000022FC000-memory.dmp

Filesize
31.0MB

Download
memory/1492-54-0x0000000002404000-0x000000000240B000-memory.dmp

Filesize
28KB

Download
memory/1492-55-0x00000000762C1000-0x00000000762C3000-memory.dmp

Filesize
8KB

Download
memory/1492-56-0x0000000002404000-0x000000000240B000-memory.dmp

Filesize
28KB

Download
memory/1492-57-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/1492-58-0x0000000000400000-0x00000000022FC000-memory.dmp

Filesize
31.0MB

Download

Analysis

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