systembc | 67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4

General

Target

67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe
Size

90KB
MD5

92dbe3d237c0b38a6feaece08bf7a1f6
SHA1

5eeda1c31858de743f8afa7ce6c24c8c0e816c7d
SHA256

67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4
SHA512

fe5f35f485dc2a675374c2581ea8a0bb92f88ef43d225e0f53d57bed6587fd73a8554cd946af252f1557e3e8573c00c43929c31e9e32258aae2b49e538c6494d

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:

phveh.exe

pid process

2028 phveh.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
2028	phveh.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:

67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe

description	ioc	process
File created	C:\Windows\Tasks\phveh.job	67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe
File opened for modification	C:\Windows\Tasks\phveh.job	67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe

pid process

1832 67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe

pid	process
1832	67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1424 wrote to memory of 2028	1424	taskeng.exe	phveh.exe
PID 1424 wrote to memory of 2028	1424	taskeng.exe	phveh.exe
PID 1424 wrote to memory of 2028	1424	taskeng.exe	phveh.exe
PID 1424 wrote to memory of 2028	1424	taskeng.exe	phveh.exe

C:\Users\Admin\AppData\Local\Temp\67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe
"C:\Users\Admin\AppData\Local\Temp\67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1832

C:\Windows\system32\taskeng.exe
taskeng.exe {B4AA296E-686F-4C7F-9D8F-93C3BA6E7EB4} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1424

C:\ProgramData\umsci\phveh.exe
C:\ProgramData\umsci\phveh.exe start
2⤵
- Executes dropped EXE
PID:2028

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\umsci\phveh.exe
Filesize
90KB

MD5
92dbe3d237c0b38a6feaece08bf7a1f6

SHA1
5eeda1c31858de743f8afa7ce6c24c8c0e816c7d

SHA256
67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4

SHA512
fe5f35f485dc2a675374c2581ea8a0bb92f88ef43d225e0f53d57bed6587fd73a8554cd946af252f1557e3e8573c00c43929c31e9e32258aae2b49e538c6494d

Download Submit
C:\ProgramData\umsci\phveh.exe
Filesize
90KB

MD5
92dbe3d237c0b38a6feaece08bf7a1f6

SHA1
5eeda1c31858de743f8afa7ce6c24c8c0e816c7d

SHA256
67713ae5aac48a69c97bcb8dbc6db59518a3b7c60ce57ab48c1883bd995bf7d4

SHA512
fe5f35f485dc2a675374c2581ea8a0bb92f88ef43d225e0f53d57bed6587fd73a8554cd946af252f1557e3e8573c00c43929c31e9e32258aae2b49e538c6494d

Download Submit
memory/1832-54-0x00000000002E8000-0x00000000002EF000-memory.dmp

Filesize
28KB

Download
memory/1832-55-0x00000000002E8000-0x00000000002EF000-memory.dmp

Filesize
28KB

Download
memory/1832-56-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/1832-57-0x0000000074F91000-0x0000000074F93000-memory.dmp

Filesize
8KB

Download
memory/1832-58-0x0000000000400000-0x0000000000F74000-memory.dmp

Filesize
11.5MB

Download
memory/2028-60-0x0000000000000000-mapping.dmp

Download
memory/2028-62-0x0000000001008000-0x000000000100F000-memory.dmp

Filesize
28KB

Download
memory/2028-65-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/2028-64-0x0000000001008000-0x000000000100F000-memory.dmp

Filesize
28KB

Download
memory/2028-66-0x0000000000400000-0x0000000000F74000-memory.dmp

Filesize
11.5MB

Download

Analysis

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