systembc | 90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d

General

Target

90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe
Size

85KB
MD5

281ab6111ab22e0e725a98e5496e7ce5
SHA1

d9f0476d385901285953b8ed0a8fbcbcdfba7da3
SHA256

90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d
SHA512

35c4f4b605476ee96270cc75897bc666c78d11f68107c25d1f3803bcd66ff2fff11388b51ff8cb1ffb12834ac3ed338ce2b3a0c911b67642cc77515eab6c300f

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

advertrex20.xyz:4044

gentexman37.xyz:4044

Signatures

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

Processes:

thfm.exe

pid process

1600 thfm.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

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

Connection Proxy
T1090

pid	process
1600	thfm.exe

flow	ioc
10	api.ipify.org
11	api.ipify.org

Drops file in Windows directory 2 IoCs

Processes:

90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe

description	ioc	process
File created	C:\Windows\Tasks\thfm.job	90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe
File opened for modification	C:\Windows\Tasks\thfm.job	90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

812 1804 WerFault.exe 90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe

pid	pid_target	process	target process
812	1804	WerFault.exe	90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe

pid	process
1804	90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe
1804	90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe

C:\Users\Admin\AppData\Local\Temp\90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe
"C:\Users\Admin\AppData\Local\Temp\90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1804 -s 952
2⤵
- Program crash
PID:812

C:\ProgramData\fdmb\thfm.exe
C:\ProgramData\fdmb\thfm.exe start
1⤵
- Executes dropped EXE
PID:1600

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 1804 -ip 1804
1⤵
PID:3200

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\fdmb\thfm.exe
Filesize
85KB

MD5
281ab6111ab22e0e725a98e5496e7ce5

SHA1
d9f0476d385901285953b8ed0a8fbcbcdfba7da3

SHA256
90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d

SHA512
35c4f4b605476ee96270cc75897bc666c78d11f68107c25d1f3803bcd66ff2fff11388b51ff8cb1ffb12834ac3ed338ce2b3a0c911b67642cc77515eab6c300f

Download Submit
C:\ProgramData\fdmb\thfm.exe
Filesize
85KB

MD5
281ab6111ab22e0e725a98e5496e7ce5

SHA1
d9f0476d385901285953b8ed0a8fbcbcdfba7da3

SHA256
90e911af297498fdfd40e24a9b33e106b082c9e4a00caf2a7f341da9b044b43d

SHA512
35c4f4b605476ee96270cc75897bc666c78d11f68107c25d1f3803bcd66ff2fff11388b51ff8cb1ffb12834ac3ed338ce2b3a0c911b67642cc77515eab6c300f

Download Submit
memory/1600-136-0x00000000007B3000-0x00000000007B9000-memory.dmp

Filesize
24KB

Download
memory/1600-137-0x00000000007B3000-0x00000000007B9000-memory.dmp

Filesize
24KB

Download
memory/1600-138-0x00000000005B0000-0x00000000005B9000-memory.dmp

Filesize
36KB

Download
memory/1600-139-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/1804-130-0x00000000005D8000-0x00000000005DF000-memory.dmp

Filesize
28KB

Download
memory/1804-131-0x00000000005D8000-0x00000000005DF000-memory.dmp

Filesize
28KB

Download
memory/1804-132-0x0000000002060000-0x0000000002069000-memory.dmp

Filesize
36KB

Download
memory/1804-133-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download

Analysis

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