systembc | b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69

General

Target

b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe
Size

331KB
MD5

5141357dda4fab9146a6724f8793f634
SHA1

05ff08362df5e50e457cfa10c4c6b730ca722ea9
SHA256

b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69
SHA512

1a4d16fb1d0633909f8551d9095dd708966b4cba47ce8c3504fda3456c290ba685cd0e234a9fe98a78913eb19193877f014ca74c22090592ddccdba1d92f43be

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

26asdcgd.com:4039

26asdcgd.xyz:4039

Signatures

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

Processes:

lnasq.exe

pid process

2044 lnasq.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
2044	lnasq.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:

b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe

description	ioc	process
File created	C:\Windows\Tasks\lnasq.job	b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe
File opened for modification	C:\Windows\Tasks\lnasq.job	b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe

pid process

1652 b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe

pid	process
1652	b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1192 wrote to memory of 2044	1192	taskeng.exe	lnasq.exe
PID 1192 wrote to memory of 2044	1192	taskeng.exe	lnasq.exe
PID 1192 wrote to memory of 2044	1192	taskeng.exe	lnasq.exe
PID 1192 wrote to memory of 2044	1192	taskeng.exe	lnasq.exe

C:\Users\Admin\AppData\Local\Temp\b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe
"C:\Users\Admin\AppData\Local\Temp\b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1652

C:\Windows\system32\taskeng.exe
taskeng.exe {5BE5D619-6E45-4C1A-A49D-486A249DB7D4} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1192

C:\ProgramData\gmsedx\lnasq.exe
C:\ProgramData\gmsedx\lnasq.exe start
2⤵
- Executes dropped EXE
PID:2044

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\gmsedx\lnasq.exe
Filesize
331KB

MD5
5141357dda4fab9146a6724f8793f634

SHA1
05ff08362df5e50e457cfa10c4c6b730ca722ea9

SHA256
b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69

SHA512
1a4d16fb1d0633909f8551d9095dd708966b4cba47ce8c3504fda3456c290ba685cd0e234a9fe98a78913eb19193877f014ca74c22090592ddccdba1d92f43be

Download Submit
C:\ProgramData\gmsedx\lnasq.exe
Filesize
331KB

MD5
5141357dda4fab9146a6724f8793f634

SHA1
05ff08362df5e50e457cfa10c4c6b730ca722ea9

SHA256
b1dd18e76c03df66c80e63806ab5e7117232c22dfbd5c275d4aea13da9a3bf69

SHA512
1a4d16fb1d0633909f8551d9095dd708966b4cba47ce8c3504fda3456c290ba685cd0e234a9fe98a78913eb19193877f014ca74c22090592ddccdba1d92f43be

Download Submit
memory/1652-54-0x0000000000CC5000-0x0000000000CCC000-memory.dmp

Filesize
28KB

Download
memory/1652-55-0x0000000075781000-0x0000000075783000-memory.dmp

Filesize
8KB

Download
memory/1652-56-0x0000000000CC5000-0x0000000000CCC000-memory.dmp

Filesize
28KB

Download
memory/1652-57-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/1652-58-0x0000000000400000-0x0000000000C2C000-memory.dmp

Filesize
8.2MB

Download
memory/2044-60-0x0000000000000000-mapping.dmp

Download
memory/2044-62-0x0000000000DE5000-0x0000000000DEC000-memory.dmp

Filesize
28KB

Download
memory/2044-64-0x0000000000DE5000-0x0000000000DEC000-memory.dmp

Filesize
28KB

Download
memory/2044-65-0x0000000000400000-0x0000000000C2C000-memory.dmp

Filesize
8.2MB

Download

Analysis

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