systembc | c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a

General

Target

c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe
Size

173KB
MD5

b116459b4baffd9c1efd7153884f9d35
SHA1

673fd7eb331a1c5645fa4264f85bbd722531f318
SHA256

c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a
SHA512

6f09a7b7be8a3f4519492d387e2c1441e70cc411eafb2e463ce0f0b802e9b672a60895b778a27adaa5a55d9fd35c3285a342658ca77cd1240c026efb10eea1aa

Score

10^/10

systembc trojan upx

Malware Config

Extracted

Family

systembc

C2

dec15coma.com:4039

dec15coma.xyz:4039

Signatures

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

Processes:

vtan.exe

pid process

728 vtan.exe

pid	process
728	vtan.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\ProgramData\mgnu\vtan.exe	upx
C:\ProgramData\mgnu\vtan.exe	upx

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

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:

c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe

description	ioc	process
File created	C:\Windows\Tasks\vtan.job	c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe
File opened for modification	C:\Windows\Tasks\vtan.job	c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe

pid process

1152 c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe

pid	process
1152	c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 840 wrote to memory of 728	840	taskeng.exe	vtan.exe
PID 840 wrote to memory of 728	840	taskeng.exe	vtan.exe
PID 840 wrote to memory of 728	840	taskeng.exe	vtan.exe
PID 840 wrote to memory of 728	840	taskeng.exe	vtan.exe

C:\Users\Admin\AppData\Local\Temp\c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe
"C:\Users\Admin\AppData\Local\Temp\c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1152

C:\Windows\system32\taskeng.exe
taskeng.exe {D6550A4C-C31C-47D0-BA87-1B73086FCD12} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:840

C:\ProgramData\mgnu\vtan.exe
C:\ProgramData\mgnu\vtan.exe start
2⤵
- Executes dropped EXE
PID:728

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

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Downloads

C:\ProgramData\mgnu\vtan.exe
MD5
b116459b4baffd9c1efd7153884f9d35

SHA1
673fd7eb331a1c5645fa4264f85bbd722531f318

SHA256
c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a

SHA512
6f09a7b7be8a3f4519492d387e2c1441e70cc411eafb2e463ce0f0b802e9b672a60895b778a27adaa5a55d9fd35c3285a342658ca77cd1240c026efb10eea1aa

Download Submit
C:\ProgramData\mgnu\vtan.exe
MD5
b116459b4baffd9c1efd7153884f9d35

SHA1
673fd7eb331a1c5645fa4264f85bbd722531f318

SHA256
c37e79057ccdd18492554cfb1d86d77a69667ce2a8b0841d560f12eb479f356a

SHA512
6f09a7b7be8a3f4519492d387e2c1441e70cc411eafb2e463ce0f0b802e9b672a60895b778a27adaa5a55d9fd35c3285a342658ca77cd1240c026efb10eea1aa

Download Submit
memory/728-61-0x0000000000400000-0x00000000047B7000-memory.dmp

Filesize
67.7MB

Download
memory/1152-54-0x0000000076AC1000-0x0000000076AC3000-memory.dmp

Filesize
8KB

Download
memory/1152-56-0x0000000000030000-0x0000000000039000-memory.dmp

Filesize
36KB

Download
memory/1152-55-0x0000000000020000-0x0000000000026000-memory.dmp

Filesize
24KB

Download
memory/1152-57-0x0000000000400000-0x00000000047B7000-memory.dmp

Filesize
67.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads