systembc | c27741b9e50da0c369b848179c9a4f9b0362b6d5e384055c6c72fc9667a270ec | Triage

Analysis

max time kernel
131s
max time network
182s
platform
windows7_x64
resource
win7v20210408
submitted
28-09-2021 20:47

Sharing

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General

Target

1d29d6cd39010976adcb9fcba517f3bc.exe
Size

117KB
MD5

1d29d6cd39010976adcb9fcba517f3bc
SHA1

86d13d8593d4eea9e5b8c9dca9a1d30c7c03f67c
SHA256

c27741b9e50da0c369b848179c9a4f9b0362b6d5e384055c6c72fc9667a270ec
SHA512

fb332b210b5c8549097d55740d09ff06c9beabe40c2c020013e59f429df29c3b0cb7925de4eafb536b299361ea2b533c65a133ee6784e594574441ed04b09c48

Score

10^/10

systembc trojan

Malware Config

Extracted

Family

systembc

C2

195.2.76.80:4001

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc

Drops file in Windows directory 2 IoCs

Processes:

1d29d6cd39010976adcb9fcba517f3bc.exe

description	ioc	process
File created	C:\Windows\Tasks\wow64.job	1d29d6cd39010976adcb9fcba517f3bc.exe
File opened for modification	C:\Windows\Tasks\wow64.job	1d29d6cd39010976adcb9fcba517f3bc.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1456 wrote to memory of 816	1456	taskeng.exe	1d29d6cd39010976adcb9fcba517f3bc.exe
PID 1456 wrote to memory of 816	1456	taskeng.exe	1d29d6cd39010976adcb9fcba517f3bc.exe
PID 1456 wrote to memory of 816	1456	taskeng.exe	1d29d6cd39010976adcb9fcba517f3bc.exe
PID 1456 wrote to memory of 816	1456	taskeng.exe	1d29d6cd39010976adcb9fcba517f3bc.exe

C:\Users\Admin\AppData\Local\Temp\1d29d6cd39010976adcb9fcba517f3bc.exe
"C:\Users\Admin\AppData\Local\Temp\1d29d6cd39010976adcb9fcba517f3bc.exe"
1⤵
- Drops file in Windows directory
PID:628

C:\Windows\system32\taskeng.exe
taskeng.exe {BDC519F3-F310-48CF-8E7B-4AAEFB4DF301} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1456

C:\Users\Admin\AppData\Local\Temp\1d29d6cd39010976adcb9fcba517f3bc.exe
C:\Users\Admin\AppData\Local\Temp\1d29d6cd39010976adcb9fcba517f3bc.exe start
2⤵
PID:816

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/628-59-0x00000000757C1000-0x00000000757C3000-memory.dmp

Filesize
8KB

Download
memory/628-60-0x00000000001B0000-0x00000000001B5000-memory.dmp

Filesize
20KB

Download
memory/628-61-0x0000000000400000-0x00000000004A4000-memory.dmp

Filesize
656KB

Download
memory/816-62-0x0000000000000000-mapping.dmp

Download
memory/816-64-0x0000000000400000-0x00000000004A4000-memory.dmp

Filesize
656KB

Download