systembc | dc23e92b35cd9ceb3e8adc91a4492facfd66d65f72967ba69c57f17470f9b66f

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
06-02-2023 08:54

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General

Target

4b8b7e4c7b2aed6c3c67b3d5678f6440.exe
Size

106KB
MD5

4b8b7e4c7b2aed6c3c67b3d5678f6440
SHA1

33097d2c883f7e8248c70876cfd6c77b36a1622a
SHA256

dc23e92b35cd9ceb3e8adc91a4492facfd66d65f72967ba69c57f17470f9b66f
SHA512

51d09f79f1d3fbff711bcb99df119f625bbe2d28be99de2555dc374074b64218be8b536da96047b60449a0a7f67932e27894fa1b3ce0fb6efeadd0234e7203e6
SSDEEP

1536:8++5Uk52zLQTDgoYjylkKKPv9AmIBIZigwp6OGWVVpOJV1U5uHk0UgYc5:8zqk5ELAD4yuK52ZEp6OGA+bU5DJc5

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

sdadvert197.com:4044

mexstat128.com:4044

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Executes dropped EXE 1 IoCs

Processes:

uemfnj.exe

pid process

2344 uemfnj.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

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

Connection Proxy
T1090

pid	process
2344	uemfnj.exe

flow	ioc
32	api.ipify.org
33	api.ipify.org

Drops file in Windows directory 2 IoCs

Processes:

4b8b7e4c7b2aed6c3c67b3d5678f6440.exe

description	ioc	process
File created	C:\Windows\Tasks\uemfnj.job	4b8b7e4c7b2aed6c3c67b3d5678f6440.exe
File opened for modification	C:\Windows\Tasks\uemfnj.job	4b8b7e4c7b2aed6c3c67b3d5678f6440.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3172 1620 WerFault.exe 4b8b7e4c7b2aed6c3c67b3d5678f6440.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

4b8b7e4c7b2aed6c3c67b3d5678f6440.exe

pid process

1620 4b8b7e4c7b2aed6c3c67b3d5678f6440.exe
1620 4b8b7e4c7b2aed6c3c67b3d5678f6440.exe

pid	pid_target	process	target process
3172	1620	WerFault.exe	4b8b7e4c7b2aed6c3c67b3d5678f6440.exe

pid	process
1620	4b8b7e4c7b2aed6c3c67b3d5678f6440.exe
1620	4b8b7e4c7b2aed6c3c67b3d5678f6440.exe

C:\Users\Admin\AppData\Local\Temp\4b8b7e4c7b2aed6c3c67b3d5678f6440.exe
"C:\Users\Admin\AppData\Local\Temp\4b8b7e4c7b2aed6c3c67b3d5678f6440.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1620

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1620 -s 936
2⤵
- Program crash
PID:3172

C:\ProgramData\jvji\uemfnj.exe
C:\ProgramData\jvji\uemfnj.exe start
1⤵
- Executes dropped EXE
PID:2344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1620 -ip 1620
1⤵
PID:3184

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

T1090

Impact

Replay Monitor

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Downloads

C:\ProgramData\jvji\uemfnj.exe
Filesize
106KB

MD5
4b8b7e4c7b2aed6c3c67b3d5678f6440

SHA1
33097d2c883f7e8248c70876cfd6c77b36a1622a

SHA256
dc23e92b35cd9ceb3e8adc91a4492facfd66d65f72967ba69c57f17470f9b66f

SHA512
51d09f79f1d3fbff711bcb99df119f625bbe2d28be99de2555dc374074b64218be8b536da96047b60449a0a7f67932e27894fa1b3ce0fb6efeadd0234e7203e6

Download Submit
C:\ProgramData\jvji\uemfnj.exe
Filesize
106KB

MD5
4b8b7e4c7b2aed6c3c67b3d5678f6440

SHA1
33097d2c883f7e8248c70876cfd6c77b36a1622a

SHA256
dc23e92b35cd9ceb3e8adc91a4492facfd66d65f72967ba69c57f17470f9b66f

SHA512
51d09f79f1d3fbff711bcb99df119f625bbe2d28be99de2555dc374074b64218be8b536da96047b60449a0a7f67932e27894fa1b3ce0fb6efeadd0234e7203e6

Download Submit
memory/1620-133-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/1620-134-0x0000000002100000-0x0000000002109000-memory.dmp

Filesize
36KB

Download
memory/1620-135-0x0000000000400000-0x000000000050F000-memory.dmp

Filesize
1.1MB

Download
memory/1620-136-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/1620-137-0x0000000002100000-0x0000000002109000-memory.dmp

Filesize
36KB

Download
memory/1620-142-0x0000000000400000-0x000000000050F000-memory.dmp

Filesize
1.1MB

Download
memory/2344-140-0x0000000000633000-0x0000000000639000-memory.dmp

Filesize
24KB

Download
memory/2344-141-0x0000000000400000-0x000000000050F000-memory.dmp

Filesize
1.1MB

Download