systembc | a0a5ebd512b7685798ac966c0b05415df9eff585a79af11c9ff99d7aa17e2101

max time kernel
137s
max time network
139s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
08-02-2023 19:06

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General

Target

2579be109c1035cb96942951710020a8.exe
Size

147KB
MD5

2579be109c1035cb96942951710020a8
SHA1

6987472967c8ce5e3d5fd6730a9da2964afacd10
SHA256

a0a5ebd512b7685798ac966c0b05415df9eff585a79af11c9ff99d7aa17e2101
SHA512

191ea3d7edc69f1cb9d1ec4967074667c5e1c6b02fdaa8bbc5a4414bf5ca00ccafadc49670c5b3065133915d78e482572545f1d0c8c3382e6a767c1f08a33a21
SSDEEP

3072:9NuSXw/c4JHdNX8PAzCABaxg0r27f8EjQspDNJJAksa:9oSXw/hfNXmAzbYg02Ok

Score

10^/10

systembc trojan upx

Malware Config

Extracted

Family

systembc

advertspace10.club:4044

logstat17.club:4044

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
568	mbshmbh.exe
1284	mbshmbh.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1748-55-0x0000000000400000-0x000000000044D000-memory.dmp	upx
behavioral1/memory/1748-56-0x0000000000400000-0x000000000044D000-memory.dmp	upx
behavioral1/files/0x00080000000126d1-59.dat	upx
behavioral1/files/0x00080000000126d1-61.dat	upx
behavioral1/memory/568-63-0x0000000000400000-0x000000000044D000-memory.dmp	upx
behavioral1/memory/568-65-0x0000000000400000-0x000000000044D000-memory.dmp	upx
behavioral1/files/0x00080000000126d1-69.dat	upx
behavioral1/memory/1284-71-0x0000000000400000-0x000000000044D000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\mbshmbh.job	2579be109c1035cb96942951710020a8.exe
File opened for modification	C:\Windows\Tasks\mbshmbh.job	2579be109c1035cb96942951710020a8.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1748	2579be109c1035cb96942951710020a8.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 816 wrote to memory of 568	816	taskeng.exe	29
PID 816 wrote to memory of 568	816	taskeng.exe	29
PID 816 wrote to memory of 568	816	taskeng.exe	29
PID 816 wrote to memory of 568	816	taskeng.exe	29
PID 816 wrote to memory of 1284	816	taskeng.exe	30
PID 816 wrote to memory of 1284	816	taskeng.exe	30
PID 816 wrote to memory of 1284	816	taskeng.exe	30
PID 816 wrote to memory of 1284	816	taskeng.exe	30

C:\Users\Admin\AppData\Local\Temp\2579be109c1035cb96942951710020a8.exe
"C:\Users\Admin\AppData\Local\Temp\2579be109c1035cb96942951710020a8.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1748

C:\Windows\system32\taskeng.exe
taskeng.exe {89D64EE3-5F28-4323-A461-536C6AAB0D6B} S-1-5-21-3406023954-474543476-3319432036-1000:VUIIVLGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:816
- C:\ProgramData\rweon\mbshmbh.exe
  C:\ProgramData\rweon\mbshmbh.exe start2
  2⤵
  - Executes dropped EXE
  PID:568
- C:\ProgramData\rweon\mbshmbh.exe
  C:\ProgramData\rweon\mbshmbh.exe start2
  2⤵
  - Executes dropped EXE
  PID:1284

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\ProgramData\rweon\mbshmbh.exe

Filesize
147KB

MD5
2579be109c1035cb96942951710020a8

SHA1
6987472967c8ce5e3d5fd6730a9da2964afacd10

SHA256
a0a5ebd512b7685798ac966c0b05415df9eff585a79af11c9ff99d7aa17e2101

SHA512
191ea3d7edc69f1cb9d1ec4967074667c5e1c6b02fdaa8bbc5a4414bf5ca00ccafadc49670c5b3065133915d78e482572545f1d0c8c3382e6a767c1f08a33a21

Download Submit
C:\ProgramData\rweon\mbshmbh.exe

Filesize
147KB

MD5
2579be109c1035cb96942951710020a8

SHA1
6987472967c8ce5e3d5fd6730a9da2964afacd10

SHA256
a0a5ebd512b7685798ac966c0b05415df9eff585a79af11c9ff99d7aa17e2101

SHA512
191ea3d7edc69f1cb9d1ec4967074667c5e1c6b02fdaa8bbc5a4414bf5ca00ccafadc49670c5b3065133915d78e482572545f1d0c8c3382e6a767c1f08a33a21

Download Submit
C:\ProgramData\rweon\mbshmbh.exe

Filesize
147KB

MD5
2579be109c1035cb96942951710020a8

SHA1
6987472967c8ce5e3d5fd6730a9da2964afacd10

SHA256
a0a5ebd512b7685798ac966c0b05415df9eff585a79af11c9ff99d7aa17e2101

SHA512
191ea3d7edc69f1cb9d1ec4967074667c5e1c6b02fdaa8bbc5a4414bf5ca00ccafadc49670c5b3065133915d78e482572545f1d0c8c3382e6a767c1f08a33a21

Download Submit
memory/568-67-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/568-63-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/568-65-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/568-64-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1284-71-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1284-72-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1284-73-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1748-56-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1748-57-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1748-66-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1748-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

Download
memory/1748-58-0x0000000001C10000-0x0000000001C44000-memory.dmp

Filesize
208KB

Download
memory/1748-55-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download