systembc | 21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66

General

Target

21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe
Size

307KB
MD5

53818ba0882a4f72965c01517b478499
SHA1

fd50ef3f7d99b87ab1c0f1edb2c1790021b7203f
SHA256

21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66
SHA512

9634cd14457db9be6e921bec1c15b192837610286dcd4ef0f3d81d73e504358bcbcc2eaa95d1a0388482207c7d58348ccd9eeefbe3c8e746eaf516d1952b0b75

Score

10^/10

systembc suricata trojan

Malware Config

Extracted

Family

systembc

C2

sdadvert197.com:4044

mexstat128.com:4044

Signatures

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:

abwhea.exe

pid process

1968 abwhea.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

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

Connection Proxy
T1090

pid	process
1968	abwhea.exe

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

Drops file in Windows directory 2 IoCs

Processes:

21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe

description	ioc	process
File created	C:\Windows\Tasks\abwhea.job	21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe
File opened for modification	C:\Windows\Tasks\abwhea.job	21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe

pid process

1016 21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe

pid	process
1016	21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 2028 wrote to memory of 1968	2028	taskeng.exe	abwhea.exe
PID 2028 wrote to memory of 1968	2028	taskeng.exe	abwhea.exe
PID 2028 wrote to memory of 1968	2028	taskeng.exe	abwhea.exe
PID 2028 wrote to memory of 1968	2028	taskeng.exe	abwhea.exe

C:\Users\Admin\AppData\Local\Temp\21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe
"C:\Users\Admin\AppData\Local\Temp\21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1016

C:\Windows\system32\taskeng.exe
taskeng.exe {ED3AC209-0898-4730-AFCA-BAF00C816B87} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2028

C:\ProgramData\bxxxcev\abwhea.exe
C:\ProgramData\bxxxcev\abwhea.exe start
2⤵
- Executes dropped EXE
PID:1968

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

1

T1090

Impact

Replay Monitor

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Downloads

C:\ProgramData\bxxxcev\abwhea.exe
Filesize
307KB

MD5
53818ba0882a4f72965c01517b478499

SHA1
fd50ef3f7d99b87ab1c0f1edb2c1790021b7203f

SHA256
21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66

SHA512
9634cd14457db9be6e921bec1c15b192837610286dcd4ef0f3d81d73e504358bcbcc2eaa95d1a0388482207c7d58348ccd9eeefbe3c8e746eaf516d1952b0b75

Download Submit
C:\ProgramData\bxxxcev\abwhea.exe
Filesize
307KB

MD5
53818ba0882a4f72965c01517b478499

SHA1
fd50ef3f7d99b87ab1c0f1edb2c1790021b7203f

SHA256
21e36cb944c9a595bc88ab53151ab15fe280d723a8d58f7ad97e60ecde167f66

SHA512
9634cd14457db9be6e921bec1c15b192837610286dcd4ef0f3d81d73e504358bcbcc2eaa95d1a0388482207c7d58348ccd9eeefbe3c8e746eaf516d1952b0b75

Download Submit
memory/1016-54-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

Filesize
8KB

Download
memory/1016-55-0x0000000000DFB000-0x0000000000E02000-memory.dmp

Filesize
28KB

Download
memory/1016-56-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1016-57-0x0000000000400000-0x0000000000C2A000-memory.dmp

Filesize
8.2MB

Download
memory/1968-59-0x0000000000000000-mapping.dmp

Download
memory/1968-63-0x0000000000400000-0x0000000000C2A000-memory.dmp

Filesize
8.2MB

Download
memory/1968-62-0x0000000000CBB000-0x0000000000CC2000-memory.dmp

Filesize
28KB

Download

Analysis

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