systembc | a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6

Analysis

max time kernel
145s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
25-07-2024 04:57

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General

Target

a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe
Size

240KB
MD5

9cc2a0c88851f241b01efa7e9372f32b
SHA1

fc455d1c0ab2653c146a277e4e246a4e3e5ba0c2
SHA256

a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6
SHA512

b1bb3fd5efc660d3831b773e710aaeb7723106e50de3ea3a5822348d255588c87cb900d5bcb094ae535b7cdddaddf3aa12180d660d389be0066c68897aad81d0
SSDEEP

3072:spKr2asc3+9yYO1jkLp8x5IiCx//9IiGCH:YxQnyLeWVA

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

resource	yara_rule
behavioral2/files/0x00090000000233e2-3.dat	aspack_v212_v242

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	rrkVgz.exe

Executes dropped EXE 3 IoCs

pid	Process
2540	rrkVgz.exe
4584	vqxwl.exe
3848	rrkVgz.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Google\Chrome\Application\123.0.6312.106\elevation_service.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSQRY32.EXE	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Smart Tag\SmartTagInstall.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.549981C3F5F10_1.1911.21713.0_x64__8wekyb3d8bbwe\Cortana.exe	rrkVgz.exe
File opened for modification	C:\Program Files (x86)\Google\Update\Download\{8A69D345-D564-463C-AFF1-A69D9E530F96}\123.0.6312.106\chrome_installer.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jp2launcher.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Windows Photo Viewer\ImagingDevices.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Xbox.TCUI_1.23.28002.0_x64__8wekyb3d8bbwe\TCUI-App.exe	rrkVgz.exe
File opened for modification	C:\Program Files (x86)\Google\Update\DisabledGoogleUpdate.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\javaws.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\NAMECONTROLSERVER.EXE	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\XLICONS.EXE	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.People_10.1902.633.0_x64__8wekyb3d8bbwe\PeopleApp.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Mozilla Firefox\plugin-container.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_3.6.73.0_x64__8wekyb3d8bbwe\Microsoft.Notes.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.19071.19011.0_x64__8wekyb3d8bbwe\Music.UI.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jinfo.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\rmid.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jjs.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Integration\Integrator.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\AppSharingHookController.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\rmiregistry.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Wallet_2.4.18324.0_x64__8wekyb3d8bbwe\Microsoft.Wallet.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1906.1972.0_x64__8wekyb3d8bbwe\Maps.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\chrome.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\Office16\OSPPREARM.EXE	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX86\Microsoft Shared\EQUATION\eqnedt32.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxGameOverlay_1.46.11001.0_x64__8wekyb3d8bbwe\GameBar.exe	rrkVgz.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.371\GoogleCrashHandler64.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\rmiregistry.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\wsimport.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\MSOXMLED.EXE	rrkVgz.exe
File opened for modification	C:\Program Files\Mozilla Firefox\private_browsing.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Windows Mail\wabmig.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jdeps.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\javaw.exe	rrkVgz.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vlc-cache-gen.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Getstarted_8.2.22942.0_x64__8wekyb3d8bbwe\WhatsNew.Store.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxSpeechToTextOverlay_1.17.29001.0_x64__8wekyb3d8bbwe\SpeechToTextOverlay64-Retail.exe	rrkVgz.exe
File opened for modification	C:\Program Files\7-Zip\Uninstall.exe	rrkVgz.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\createdump.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jar.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jabswitch.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxGamingOverlay_2.34.28001.0_x64__8wekyb3d8bbwe\GameBar.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\javacpl.exe	rrkVgz.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.371\GoogleUpdateCore.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\appletviewer.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javah.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\ktab.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\pack200.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\orbd.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\PerfBoost.exe	rrkVgz.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\pi_brokers\64BitMAPIBroker.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_10.1906.1972.0_x64__8wekyb3d8bbwe\SoundRec.exe	rrkVgz.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.371\GoogleCrashHandler.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\extcheck.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\policytool.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\ktab.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Client\AppVDllSurrogate64.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSOSREC.EXE	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_4.4.8204.0_x64__8wekyb3d8bbwe\Solitaire.exe	rrkVgz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\policytool.exe	rrkVgz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_x64__8wekyb3d8bbwe\Time.exe	rrkVgz.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\vqxwl.job	a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe
File opened for modification	C:\Windows\Tasks\vqxwl.job	a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1108	1168	WerFault.exe	83

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rrkVgz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vqxwl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rrkVgz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies data under HKEY_USERS 5 IoCs

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1168	a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe
1168	a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1168 wrote to memory of 2540	1168	a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe	84
PID 1168 wrote to memory of 2540	1168	a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe	84
PID 1168 wrote to memory of 2540	1168	a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe	84
PID 2540 wrote to memory of 1584	2540	rrkVgz.exe	88
PID 2540 wrote to memory of 1584	2540	rrkVgz.exe	88
PID 2540 wrote to memory of 1584	2540	rrkVgz.exe	88
PID 4584 wrote to memory of 3848	4584	vqxwl.exe	98
PID 4584 wrote to memory of 3848	4584	vqxwl.exe	98
PID 4584 wrote to memory of 3848	4584	vqxwl.exe	98
PID 3848 wrote to memory of 4856	3848	rrkVgz.exe	99
PID 3848 wrote to memory of 4856	3848	rrkVgz.exe	99
PID 3848 wrote to memory of 4856	3848	rrkVgz.exe	99

C:\Users\Admin\AppData\Local\Temp\a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe
"C:\Users\Admin\AppData\Local\Temp\a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1168
- C:\Users\Admin\AppData\Local\Temp\rrkVgz.exe
  C:\Users\Admin\AppData\Local\Temp\rrkVgz.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\17041241.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1584
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1168 -s 956
  2⤵
  - Program crash
  PID:1108

C:\ProgramData\dccb\vqxwl.exe
C:\ProgramData\dccb\vqxwl.exe start
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Windows\TEMP\rrkVgz.exe
  C:\Windows\TEMP\rrkVgz.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of WriteProcessMemory
  PID:3848
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Windows\TEMP\40755d4c.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1168 -ip 1168
1⤵
PID:2148

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\dccb\vqxwl.exe

Filesize
240KB

MD5
9cc2a0c88851f241b01efa7e9372f32b

SHA1
fc455d1c0ab2653c146a277e4e246a4e3e5ba0c2

SHA256
a35480f93ad4d0de19c119b903f6317cc8e59e779b654ec8f4bd5df4535267c6

SHA512
b1bb3fd5efc660d3831b773e710aaeb7723106e50de3ea3a5822348d255588c87cb900d5bcb094ae535b7cdddaddf3aa12180d660d389be0066c68897aad81d0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\A4F1OTIC\k2[1].rar

Filesize
4B

MD5
d3b07384d113edec49eaa6238ad5ff00

SHA1
f1d2d2f924e986ac86fdf7b36c94bcdf32beec15

SHA256
b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c

SHA512
0cf9180a764aba863a67b6d72f0918bc131c6772642cb2dce5a34f0a702f9470ddc2bf125c12198b1995c233c34b4afd346c54a2334c350a948a51b6e8b4e6b6

Download Submit
C:\Users\Admin\AppData\Local\Temp\05827E13.exe

Filesize
4B

MD5
20879c987e2f9a916e578386d499f629

SHA1
c7b33ddcc42361fdb847036fc07e880b81935d5d

SHA256
9f2981a7cc4d40a2a409dc895de64253acd819d7c0011c8e80b86fe899464e31

SHA512
bcdde1625364dd6dd143b45bdcec8d59cf8982aff33790d390b839f3869e0e815684568b14b555a596d616252aeeaa98dac2e6e551c9095ea11a575ff25ff84f

Download Submit
C:\Users\Admin\AppData\Local\Temp\17041241.bat

Filesize
187B

MD5
de185c7a32a51351f12173a5b9c4d65f

SHA1
8bfa38c9605e43587051e6f1bd885f36ec30dfc7

SHA256
8ec4109c70027a4b6dff7cca24ae50707ce9e8a779aeb05052153e1aefa11b41

SHA512
56e89d3b47cbb5f9335728130e793ef6d3f0d98d0f24ef30448d9835efdfed49f48c67c983e2f455a11b607981a3e2640e51118d439f3cfa77ac25a43744e48a

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

Filesize
15KB

MD5
f7d21de5c4e81341eccd280c11ddcc9a

SHA1
d4e9ef10d7685d491583c6fa93ae5d9105d815bd

SHA256
4485df22c627fa0bb899d79aa6ff29bc5be1dbc3caa2b7a490809338d54b7794

SHA512
e4553b86b083996038bacfb979ad0b86f578f95185d8efac34a77f6cc73e491d4f70e1449bbc9eb1d62f430800c1574101b270e1cb0eeed43a83049a79b636a3

Download Submit
C:\Windows\TEMP\40755d4c.bat

Filesize
133B

MD5
7080d2a6af545532f17757fa21e3c711

SHA1
9a7d9e41fe408fb4c7e51331bf3c5307bf389698

SHA256
efa611eca00f803f40ce37676ea407f1dbaee6c7d264c11102f3a195be74251b

SHA512
b21b1ec3d3f194cbcde9aff3f594e3d90caab64ee874e382d5eff80d30adbdb300dd292c0b516aae4ef990787dd3f5af447f193cd37669f8b119206d584d8894

Download Submit
memory/1168-16-0x0000000000500000-0x0000000000509000-memory.dmp

Filesize
36KB

Download
memory/1168-17-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1168-15-0x0000000000600000-0x0000000000700000-memory.dmp

Filesize
1024KB

Download
memory/1168-69-0x0000000000500000-0x0000000000509000-memory.dmp

Filesize
36KB

Download
memory/1168-0-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1168-51-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1168-68-0x0000000000600000-0x0000000000700000-memory.dmp

Filesize
1024KB

Download
memory/2540-49-0x0000000000520000-0x0000000000529000-memory.dmp

Filesize
36KB

Download
memory/2540-5-0x0000000000520000-0x0000000000529000-memory.dmp

Filesize
36KB

Download
memory/3848-63-0x00000000002D0000-0x00000000002D9000-memory.dmp

Filesize
36KB

Download
memory/4584-59-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/4584-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download