systembc | b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816

General

Target

b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe
Size

89KB
MD5

ef794afbd770b7ee3c8a9ccffb9810fe
SHA1

1bc62eeef9f672fbde7df2de77b15b25dbc87610
SHA256

b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816
SHA512

bc2539be88630e38ebbf27ee603c666815be68f3a45a0b8c04e2df59c77fba094f71f5e1f40789ac558201e7a183b63a379526848cfb35ea724464ee3436d47d

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

23hfdne.com:4035

23hfdne.xyz:4035

Signatures

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

Processes:

sdixqkl.exe

pid process

1636 sdixqkl.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

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

Connection Proxy
T1090

pid	process
1636	sdixqkl.exe

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

Drops file in Windows directory 2 IoCs

Processes:

b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe

description	ioc	process
File created	C:\Windows\Tasks\sdixqkl.job	b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe
File opened for modification	C:\Windows\Tasks\sdixqkl.job	b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe

pid process

1720 b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe

pid	process
1720	b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 956 wrote to memory of 1636	956	taskeng.exe	sdixqkl.exe
PID 956 wrote to memory of 1636	956	taskeng.exe	sdixqkl.exe
PID 956 wrote to memory of 1636	956	taskeng.exe	sdixqkl.exe
PID 956 wrote to memory of 1636	956	taskeng.exe	sdixqkl.exe

C:\Users\Admin\AppData\Local\Temp\b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe
"C:\Users\Admin\AppData\Local\Temp\b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1720

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:956

C:\ProgramData\nndor\sdixqkl.exe
C:\ProgramData\nndor\sdixqkl.exe start
2⤵
- Executes dropped EXE
PID:1636

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

Loading Replay Monitor...

Downloads

C:\ProgramData\nndor\sdixqkl.exe
Filesize
89KB

MD5
ef794afbd770b7ee3c8a9ccffb9810fe

SHA1
1bc62eeef9f672fbde7df2de77b15b25dbc87610

SHA256
b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816

SHA512
bc2539be88630e38ebbf27ee603c666815be68f3a45a0b8c04e2df59c77fba094f71f5e1f40789ac558201e7a183b63a379526848cfb35ea724464ee3436d47d

Download Submit
C:\ProgramData\nndor\sdixqkl.exe
Filesize
89KB

MD5
ef794afbd770b7ee3c8a9ccffb9810fe

SHA1
1bc62eeef9f672fbde7df2de77b15b25dbc87610

SHA256
b2fddc79dd5fbe683e9b8737304494e5b5ebf993382714f3a27c045cb3d7f816

SHA512
bc2539be88630e38ebbf27ee603c666815be68f3a45a0b8c04e2df59c77fba094f71f5e1f40789ac558201e7a183b63a379526848cfb35ea724464ee3436d47d

Download Submit
memory/1636-60-0x0000000000000000-mapping.dmp

Download
memory/1636-62-0x00000000005CB000-0x00000000005D2000-memory.dmp

Filesize
28KB

Download
memory/1636-64-0x00000000005CB000-0x00000000005D2000-memory.dmp

Filesize
28KB

Download
memory/1636-65-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download
memory/1720-54-0x00000000006CB000-0x00000000006D2000-memory.dmp

Filesize
28KB

Download
memory/1720-55-0x0000000075711000-0x0000000075713000-memory.dmp

Filesize
8KB

Download
memory/1720-56-0x00000000006CB000-0x00000000006D2000-memory.dmp

Filesize
28KB

Download
memory/1720-57-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1720-58-0x0000000000400000-0x00000000004D1000-memory.dmp

Filesize
836KB

Download

Analysis

Sharing