systembc | 055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8

Analysis

max time kernel
144s
max time network
149s
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 14:28

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General

Target

055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe
Size

246KB
MD5

97a3d3bbbf620a1eead18626beef0932
SHA1

52a1b750a8bb5b64e153179e090f95c69bd340b8
SHA256

055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8
SHA512

cf5b5a215c7e2ac16306a3f3737d9c7a57c87e8cbe92299e947cf734a8379a23f18b8a43058d359b10e1aa7597f141e54862d6980186d1614902b803c233385d
SSDEEP

3072:1+m9ZYH0gOSr9fM9pXF57/VQ9LZjfnGCH:sSSOj99/GLpe

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/0x000e000000023467-3.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-1-5-21-2650514177-1034912467-4025611726-1000\Control Panel\International\Geo\Nation	FYGAKz.exe

Executes dropped EXE 3 IoCs

pid	Process
740	FYGAKz.exe
1720	sulbh.exe
3580	FYGAKz.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\klist.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\servertool.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\officeappguardwin32.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.1906.55.0_x64__8wekyb3d8bbwe\Calculator.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.11629.20316.0_x64__8wekyb3d8bbwe\HxOutlook.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\wsimport.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Integration\Addons\OneDriveSetup.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\excelcnv.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\MSOHTMED.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\orbd.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\SkypeSrv\SKYPESERVER.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSOUC.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\Common.ShowHelp.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Office\Office16\DCF\DATABASECOMPARE.EXE	FYGAKz.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\FullTrustNotifier.exe	FYGAKz.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.371\GoogleUpdate.exe	FYGAKz.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\wabmig.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\wsgen.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\EXCEL.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DWTRIG20.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\Smart Tag\SmartTagInstall.exe	FYGAKz.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vlc-cache-gen.exe	FYGAKz.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrServicesUpdater.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\ktab.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\GRAPH.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Windows Mail\wab.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.StorePurchaseApp_11811.1001.18.0_x64__8wekyb3d8bbwe\StoreExperienceHost.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.19071.19011.0_x64__8wekyb3d8bbwe\Music.UI.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jcmd.exe	FYGAKz.exe
File opened for modification	C:\Program Files (x86)\Google\Update\DisabledGoogleUpdate.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\javaws.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSOHTMED.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\NAMECONTROLSERVER.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.GetHelp_10.1706.13331.0_x64__8wekyb3d8bbwe\GetHelp.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jabswitch.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\CLVIEW.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\PPTICO.EXE	FYGAKz.exe
File opened for modification	C:\Program Files\Mozilla Firefox\updater.exe	FYGAKz.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\pi_brokers\32BitMAPIBroker.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\PerfBoost.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jps.exe	FYGAKz.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vlc.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MSPaint_6.1907.29027.0_x64__8wekyb3d8bbwe\PaintStudio.View.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxGamingOverlay_2.34.28001.0_x64__8wekyb3d8bbwe\GameBar.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.19071.19011.0_x64__8wekyb3d8bbwe\Video.UI.exe	FYGAKz.exe
File opened for modification	C:\Program Files\7-Zip\7zFM.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\native2ascii.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX86\Microsoft Shared\EQUATION\eqnedt32.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Mozilla Firefox\pingsender.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\SkypeBridge\SkypeBridge.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.20875.0_x64__8wekyb3d8bbwe\Microsoft.WebMediaExtensions.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxIdentityProvider_12.50.6001.0_x64__8wekyb3d8bbwe\XboxIdp.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\pack200.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.People_10.1902.633.0_x64__8wekyb3d8bbwe\PeopleApp.exe	FYGAKz.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\plug_ins\pi_brokers\64BitMAPIBroker.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jrunscript.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\javaw.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.NetFX45.exe	FYGAKz.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.YourPhone_0.19051.7.0_x64__8wekyb3d8bbwe\YourPhone.exe	FYGAKz.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\createdump.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\policytool.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\bin\tnameserv.exe	FYGAKz.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\java-rmi.exe	FYGAKz.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Browser\WCChromeExtn\WCChromeNativeMessagingHost.exe	FYGAKz.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\sulbh.job	055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe
File opened for modification	C:\Windows\Tasks\sulbh.job	055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.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
4100	3900	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	sulbh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FYGAKz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FYGAKz.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"	FYGAKz.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	FYGAKz.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	FYGAKz.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	FYGAKz.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	FYGAKz.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3900	055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe
3900	055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3900 wrote to memory of 740	3900	055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe	84
PID 3900 wrote to memory of 740	3900	055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe	84
PID 3900 wrote to memory of 740	3900	055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe	84
PID 740 wrote to memory of 3084	740	FYGAKz.exe	85
PID 740 wrote to memory of 3084	740	FYGAKz.exe	85
PID 740 wrote to memory of 3084	740	FYGAKz.exe	85
PID 1720 wrote to memory of 3580	1720	sulbh.exe	99
PID 1720 wrote to memory of 3580	1720	sulbh.exe	99
PID 1720 wrote to memory of 3580	1720	sulbh.exe	99
PID 3580 wrote to memory of 3964	3580	FYGAKz.exe	100
PID 3580 wrote to memory of 3964	3580	FYGAKz.exe	100
PID 3580 wrote to memory of 3964	3580	FYGAKz.exe	100

C:\Users\Admin\AppData\Local\Temp\055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe
"C:\Users\Admin\AppData\Local\Temp\055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3900
- C:\Users\Admin\AppData\Local\Temp\FYGAKz.exe
  C:\Users\Admin\AppData\Local\Temp\FYGAKz.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:740
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\19624df0.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3084
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3900 -s 804
  2⤵
  - Program crash
  PID:4100

C:\ProgramData\vxcfwik\sulbh.exe
C:\ProgramData\vxcfwik\sulbh.exe start
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Windows\TEMP\FYGAKz.exe
  C:\Windows\TEMP\FYGAKz.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies data under HKEY_USERS
  - Suspicious use of WriteProcessMemory
  PID:3580
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Windows\TEMP\1e8b3e3d.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3964

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3900 -ip 3900
1⤵
PID:2456

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\vxcfwik\sulbh.exe

Filesize
246KB

MD5
97a3d3bbbf620a1eead18626beef0932

SHA1
52a1b750a8bb5b64e153179e090f95c69bd340b8

SHA256
055bb90b6b1355dfbd03fc77826720e14b37934a078fa1caa1ef0e47e04a99e8

SHA512
cf5b5a215c7e2ac16306a3f3737d9c7a57c87e8cbe92299e947cf734a8379a23f18b8a43058d359b10e1aa7597f141e54862d6980186d1614902b803c233385d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\WZ04RUV6\k2[1].rar

Filesize
4B

MD5
d3b07384d113edec49eaa6238ad5ff00

SHA1
f1d2d2f924e986ac86fdf7b36c94bcdf32beec15

SHA256
b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c

SHA512
0cf9180a764aba863a67b6d72f0918bc131c6772642cb2dce5a34f0a702f9470ddc2bf125c12198b1995c233c34b4afd346c54a2334c350a948a51b6e8b4e6b6

Download Submit
C:\Users\Admin\AppData\Local\Temp\19624df0.bat

Filesize
187B

MD5
358d3a16b433d4e21ccfcbf8cdf95509

SHA1
fea7566c67ed16773be28e1a05f1d1bf0825c8df

SHA256
a88611a17c744bd48f94e16effb2a865e4e685440c3d0dd7cfc49f280b412160

SHA512
8027762ed143e146396741d773b3dd9909c1fa96c5a4565c6bf2659793a90c758ee3b97f643ffad72bbd74b2952088c9fdaaabba7628777b743e6afeef3dd600

Download Submit
C:\Users\Admin\AppData\Local\Temp\2D2A278E.exe

Filesize
4B

MD5
20879c987e2f9a916e578386d499f629

SHA1
c7b33ddcc42361fdb847036fc07e880b81935d5d

SHA256
9f2981a7cc4d40a2a409dc895de64253acd819d7c0011c8e80b86fe899464e31

SHA512
bcdde1625364dd6dd143b45bdcec8d59cf8982aff33790d390b839f3869e0e815684568b14b555a596d616252aeeaa98dac2e6e551c9095ea11a575ff25ff84f

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

Filesize
15KB

MD5
f7d21de5c4e81341eccd280c11ddcc9a

SHA1
d4e9ef10d7685d491583c6fa93ae5d9105d815bd

SHA256
4485df22c627fa0bb899d79aa6ff29bc5be1dbc3caa2b7a490809338d54b7794

SHA512
e4553b86b083996038bacfb979ad0b86f578f95185d8efac34a77f6cc73e491d4f70e1449bbc9eb1d62f430800c1574101b270e1cb0eeed43a83049a79b636a3

Download Submit
C:\Windows\TEMP\1e8b3e3d.bat

Filesize
133B

MD5
a6a5af27718f8493dd2eb1632f32c088

SHA1
c78a56b0310dd82b43c206226f3433ad4ce3d23e

SHA256
6f84b0a4367e67ce6de51b64cce5d2bce8f6f820325fca94e0011d7a39fa3b0f

SHA512
2e7b9a57d5abf5b3d9dcd4a03bc8d2045f693f154abad111fd81422569875fc9c7b4fde037cb820a330aa4c8c9a85554b4c782a5264be3a04b45c20bf4c79183

Download Submit
memory/740-5-0x0000000000100000-0x0000000000109000-memory.dmp

Filesize
36KB

Download
memory/740-46-0x0000000000100000-0x0000000000109000-memory.dmp

Filesize
36KB

Download
memory/1720-70-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/3580-63-0x00000000005A0000-0x00000000005A9000-memory.dmp

Filesize
36KB

Download
memory/3900-52-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/3900-50-0x0000000000520000-0x0000000000529000-memory.dmp

Filesize
36KB

Download
memory/3900-0-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/3900-51-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3900-68-0x0000000000530000-0x0000000000630000-memory.dmp

Filesize
1024KB

Download
memory/3900-49-0x0000000000530000-0x0000000000630000-memory.dmp

Filesize
1024KB

Download