systembc | a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1

General

Target

a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1.exe
Size

190KB
MD5

18bf71b4b6017218464aa69ece567f98
SHA1

5eab7974b0636568d2b96cf9eef6b6bacb8adb1b
SHA256

a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1
SHA512

5efff60513e55b0961602b2ecdadd04fb8e524e5e4f5dac34bde6a6504a94c6cc8b326a7b947022a9bfea334b67a32aed6282ea4d698da598bc54cf6635a8f74

Score

10^/10

Family

systembc

C2

sdadvert197.com:4044

mexstat128.com:4044

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:

ajxto.exe

pid process

1308 ajxto.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

pid	process
1308	ajxto.exe

Drops file in Windows directory 2 IoCs

Processes:

a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1.exe

description	ioc	process
File opened for modification	C:\Windows\Tasks\ajxto.job	a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1.exe
File created	C:\Windows\Tasks\ajxto.job	a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1.exe

pid process

916 a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1.exe

pid	process
916	a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1304 wrote to memory of 1308	1304	taskeng.exe	ajxto.exe
PID 1304 wrote to memory of 1308	1304	taskeng.exe	ajxto.exe
PID 1304 wrote to memory of 1308	1304	taskeng.exe	ajxto.exe
PID 1304 wrote to memory of 1308	1304	taskeng.exe	ajxto.exe

C:\Windows\system32\taskeng.exe
taskeng.exe {BF5D225C-087D-4604-851F-43FDAC6B4977} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1304

C:\ProgramData\cadjeb\ajxto.exe
C:\ProgramData\cadjeb\ajxto.exe start
2⤵
- Executes dropped EXE
PID:1308

C:\ProgramData\cadjeb\ajxto.exe
Filesize
190KB

MD5
18bf71b4b6017218464aa69ece567f98

SHA1
5eab7974b0636568d2b96cf9eef6b6bacb8adb1b

SHA256
a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1

SHA512
5efff60513e55b0961602b2ecdadd04fb8e524e5e4f5dac34bde6a6504a94c6cc8b326a7b947022a9bfea334b67a32aed6282ea4d698da598bc54cf6635a8f74

Download Submit
C:\ProgramData\cadjeb\ajxto.exe
Filesize
190KB

MD5
18bf71b4b6017218464aa69ece567f98

SHA1
5eab7974b0636568d2b96cf9eef6b6bacb8adb1b

SHA256
a1d22e1aff7b55b24228a8da8851a8a0ee40449941123cccc59b50d8c58215a1

SHA512
5efff60513e55b0961602b2ecdadd04fb8e524e5e4f5dac34bde6a6504a94c6cc8b326a7b947022a9bfea334b67a32aed6282ea4d698da598bc54cf6635a8f74

Download Submit
memory/916-54-0x0000000075711000-0x0000000075713000-memory.dmp

Filesize
8KB

Download
memory/916-56-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/916-55-0x0000000004E8B000-0x0000000004E92000-memory.dmp

Filesize
28KB

Download
memory/916-57-0x0000000000400000-0x0000000004DAC000-memory.dmp

Filesize
73.7MB

Download
memory/1308-59-0x0000000000000000-mapping.dmp

Download
memory/1308-62-0x0000000004EAB000-0x0000000004EB2000-memory.dmp

Filesize
28KB

Download
memory/1308-63-0x0000000000400000-0x0000000004DAC000-memory.dmp

Filesize
73.7MB

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