systembc | 69b22d283fd4a6ce1c9f69f610449b016fdbb7ac1f8c23e199b3c72d7f75c61d

Analysis

max time kernel
144s
max time network
148s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
24-07-2024 11:57

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General

Target

1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe
Size

240KB
MD5

9ad0e9c3ba18150e9bb1176cd3cc5cfb
SHA1

ca69a444c9bdb2b80411cd9ba8a3be06a87053c2
SHA256

69b22d283fd4a6ce1c9f69f610449b016fdbb7ac1f8c23e199b3c72d7f75c61d
SHA512

78af683bfb37d139a1cb3e3050b1a7075443197fec209d376aafdaa0694590de1a9103dd82725649dd4b35d7485e5b7a92f74d59a531ebe06fef513e15f3650b
SSDEEP

1536:YzlKjIgWITA+dAGkDEQqrj0OzgFx3wyU0SyvmQm3ZH459VSypXoDzjD7GCq2iW7z:OlKjIbAUFzU0Scm13259VSypXAv/GCH

Score

10^/10

systembc aspackv2 discovery trojan

Malware Config

Extracted

Family

systembc

31.44.185.6:4001

31.44.185.11:4001

Signatures

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

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

Processes:

resource	yara_rule
behavioral1/files/0x000a0000000122f6-8.dat	aspack_v212_v242

Executes dropped EXE 3 IoCs

Processes:

CaEsb.exeunhsmqk.exeCaEsb.exe

pid	Process
1720	CaEsb.exe
2680	unhsmqk.exe
1740	CaEsb.exe

Loads dropped DLL 4 IoCs

Processes:

1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exeunhsmqk.exe

pid	Process
2520	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe
2520	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe
2680	unhsmqk.exe
2680	unhsmqk.exe

Drops file in Program Files directory 64 IoCs

Processes:

CaEsb.exe

description	ioc	Process
File opened for modification	C:\Program Files\Mozilla Firefox\crashreporter.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroBroker.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\Eula.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jmc.exe	CaEsb.exe
File opened for modification	C:\Program Files\Microsoft Games\Multiplayer\Spades\shvlzm.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\kinit.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jre7\bin\kinit.exe	CaEsb.exe
File opened for modification	C:\Program Files\Microsoft Games\Multiplayer\Checkers\chkrzm.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\ACCICONS.EXE	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\wabmig.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\javaw.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\ktab.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\tnameserv.exe	CaEsb.exe
File opened for modification	C:\Program Files\Microsoft Games\Mahjong\Mahjong.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\excelcnv.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\MSTORDB.EXE	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\POWERPNT.EXE	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jinfo.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\rmic.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\rmiregistry.exe	CaEsb.exe
File opened for modification	C:\Program Files\Microsoft Games\Minesweeper\MineSweeper.exe	CaEsb.exe
File opened for modification	C:\Program Files\Microsoft Games\Purble Place\PurblePlace.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\javadoc.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jhat.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.151\GoogleUpdateSetup.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\ONELEV.EXE	CaEsb.exe
File opened for modification	C:\Program Files\Windows Mail\WinMail.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jre7\bin\javaws.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\sidebar.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jdb.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\keytool.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\unpack200.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jre7\bin\keytool.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jre7\bin\javacpl.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jre7\bin\rmid.exe	CaEsb.exe
File opened for modification	C:\Program Files\Microsoft Office\Office14\MSOHTMED.EXE	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Resource\Icons\SC_Reader.exe	CaEsb.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\javafxpackager.exe	CaEsb.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe	CaEsb.exe
File opened for modification	C:\Program Files\Windows Journal\PDIALOG.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jabswitch.exe	CaEsb.exe
File opened for modification	C:\Program Files\Mozilla Firefox\maintenanceservice.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jre7\bin\orbd.exe	CaEsb.exe
File opened for modification	C:\Program Files\Mozilla Firefox\updater.exe	CaEsb.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\106.0.5249.119\notification_helper.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jsadebugd.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\INFOPATH.EXE	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\xjc.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jre7\bin\unpack200.exe	CaEsb.exe
File opened for modification	C:\Program Files\Mozilla Firefox\pingsender.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jre7\bin\java.exe	CaEsb.exe
File opened for modification	C:\Program Files\Microsoft Games\FreeCell\FreeCell.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\MSOSYNC.EXE	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\wab.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\javah.exe	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\servertool.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\MSOUC.EXE	CaEsb.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vlc-cache-gen.exe	CaEsb.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vlc.exe	CaEsb.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\CLVIEW.EXE	CaEsb.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\javaws.exe	CaEsb.exe

Drops file in Windows directory 2 IoCs

Processes:

1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe

description	ioc	Process
File created	C:\Windows\Tasks\unhsmqk.job	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe
File opened for modification	C:\Windows\Tasks\unhsmqk.job	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

unhsmqk.exeCaEsb.execmd.exe1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exeCaEsb.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	unhsmqk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CaEsb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CaEsb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies data under HKEY_USERS 3 IoCs

Processes:

CaEsb.exe

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	CaEsb.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	CaEsb.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	CaEsb.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe

pid	Process
2520	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exeCaEsb.exetaskeng.exeunhsmqk.exeCaEsb.exe

description	pid	Process	procid_target
PID 2520 wrote to memory of 1720	2520	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe	30
PID 2520 wrote to memory of 1720	2520	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe	30
PID 2520 wrote to memory of 1720	2520	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe	30
PID 2520 wrote to memory of 1720	2520	1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe	30
PID 1720 wrote to memory of 2908	1720	CaEsb.exe	32
PID 1720 wrote to memory of 2908	1720	CaEsb.exe	32
PID 1720 wrote to memory of 2908	1720	CaEsb.exe	32
PID 1720 wrote to memory of 2908	1720	CaEsb.exe	32
PID 2612 wrote to memory of 2680	2612	taskeng.exe	35
PID 2612 wrote to memory of 2680	2612	taskeng.exe	35
PID 2612 wrote to memory of 2680	2612	taskeng.exe	35
PID 2612 wrote to memory of 2680	2612	taskeng.exe	35
PID 2680 wrote to memory of 1740	2680	unhsmqk.exe	36
PID 2680 wrote to memory of 1740	2680	unhsmqk.exe	36
PID 2680 wrote to memory of 1740	2680	unhsmqk.exe	36
PID 2680 wrote to memory of 1740	2680	unhsmqk.exe	36
PID 1740 wrote to memory of 2988	1740	CaEsb.exe	37
PID 1740 wrote to memory of 2988	1740	CaEsb.exe	37
PID 1740 wrote to memory of 2988	1740	CaEsb.exe	37
PID 1740 wrote to memory of 2988	1740	CaEsb.exe	37

C:\Users\Admin\AppData\Local\Temp\1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe
"C:\Users\Admin\AppData\Local\Temp\1E31A6DE957ADB7A23E155EF8E9F80E67DC763443053E0014FBA9E91F4EEBC6F.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Users\Admin\AppData\Local\Temp\CaEsb.exe
  C:\Users\Admin\AppData\Local\Temp\CaEsb.exe
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1720
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\3b9813f2.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2908

C:\Windows\system32\taskeng.exe
taskeng.exe {3003ECD1-5AB9-401B-A1E6-90B97AC1E5AC} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:2612
- C:\ProgramData\welds\unhsmqk.exe
  C:\ProgramData\welds\unhsmqk.exe start
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2680
- - C:\Windows\TEMP\CaEsb.exe
    C:\Windows\TEMP\CaEsb.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Modifies data under HKEY_USERS
    - Suspicious use of WriteProcessMemory
    PID:1740
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Windows\TEMP\46ad45e2.bat" "
      4⤵
      System Location Discovery: System Language Discovery
      PID:2988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\welds\unhsmqk.exe

Filesize
240KB

MD5
9ad0e9c3ba18150e9bb1176cd3cc5cfb

SHA1
ca69a444c9bdb2b80411cd9ba8a3be06a87053c2

SHA256
69b22d283fd4a6ce1c9f69f610449b016fdbb7ac1f8c23e199b3c72d7f75c61d

SHA512
78af683bfb37d139a1cb3e3050b1a7075443197fec209d376aafdaa0694590de1a9103dd82725649dd4b35d7485e5b7a92f74d59a531ebe06fef513e15f3650b

Download Submit
C:\Users\Admin\AppData\Local\Temp\3b9813f2.bat

Filesize
185B

MD5
7b509a509fe267a86cc260786282308a

SHA1
d02bd3f6706b18e3114b54f6f19584f5192f1eac

SHA256
a7f6695ad88e91392af899431a56eb13984186958d1ee56739d0f6f12c2d15d4

SHA512
38810daa4b5c69492593bbeaa912daaac0e04ba36fc9811604722b1fb7bf113d07ccfe88b12d7a8ced733a517aeae04425211481e64147bf611faf4bb255bf1b

Download Submit
C:\Users\Admin\AppData\Local\Temp\CaEsb.exe

Filesize
15KB

MD5
f7d21de5c4e81341eccd280c11ddcc9a

SHA1
d4e9ef10d7685d491583c6fa93ae5d9105d815bd

SHA256
4485df22c627fa0bb899d79aa6ff29bc5be1dbc3caa2b7a490809338d54b7794

SHA512
e4553b86b083996038bacfb979ad0b86f578f95185d8efac34a77f6cc73e491d4f70e1449bbc9eb1d62f430800c1574101b270e1cb0eeed43a83049a79b636a3

Download Submit
C:\Windows\Temp\46ad45e2.bat

Filesize
131B

MD5
dc195b1b473d67af38492736ee970f4e

SHA1
faa0dc194c8c52adb995aaa2639f892f0eb600e2

SHA256
6c58f86f4a432855fab37abf47ca4a6504242c88177e5a4bdfd8ba6c780be925

SHA512
e9d3625a2ef7fceccf44bb65daa828a54e39fca50ad982477751d9fc48004207195ff784b824c4ab521451ad54f2e4577fb2f2ae6eca652335c21e4ff95de3b3

Download Submit
memory/1720-10-0x0000000000870000-0x0000000000879000-memory.dmp

Filesize
36KB

Download
memory/1720-33-0x0000000000870000-0x0000000000879000-memory.dmp

Filesize
36KB

Download
memory/1740-52-0x0000000000080000-0x0000000000089000-memory.dmp

Filesize
36KB

Download
memory/2520-15-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/2520-16-0x0000000000230000-0x0000000000239000-memory.dmp

Filesize
36KB

Download
memory/2520-35-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2520-17-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2520-1-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2520-9-0x0000000000870000-0x0000000000879000-memory.dmp

Filesize
36KB

Download
memory/2520-64-0x0000000000590000-0x0000000000690000-memory.dmp

Filesize
1024KB

Download
memory/2680-51-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/2680-44-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/2680-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download