systembc | dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d

General

Target

dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
Size

1.6MB
MD5

8c767708c9a9554c0afb504629e75ffd
SHA1

c65394806c0f77af880c7ff8a021bd4222ca3f11
SHA256

dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d
SHA512

f9531159b45f92db319f351ebf4dadf9ba3c413e87da401a0af81d25a446084ed30dee670462292b989e1c9b0074a3c2ae76bb8a1d992e4407f72360303b4e16
SSDEEP

49152:R1aqCQ3KKia9icS8P80nPIIXQocVHmir6QmEGmNyRzs3Xn:R1aA37ia9iJ800QIXQocVHoEGV0

Score

10^/10

systembc defense_evasion discovery trojan

Malware Config

Extracted

Family

systembc

C2

towerbingobongoboom.com

62.60.226.86

Signatures

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

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	rlge.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	rlge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	rlge.exe

Executes dropped EXE 1 IoCs

pid	Process
4448	rlge.exe

Identifies Wine through registry keys 2 TTPs 2 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1161330783-2912525651-1278508834-1000\Software\Wine	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
Key opened	\REGISTRY\USER\S-1-5-21-1161330783-2912525651-1278508834-1000\Software\Wine	rlge.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4924	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
4448	rlge.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\Test Task17.job	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rlge.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4924	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
4924	dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
4448	rlge.exe
4448	rlge.exe

C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe
"C:\Users\Admin\AppData\Local\Temp\dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:4924

C:\ProgramData\ptbio\rlge.exe
C:\ProgramData\ptbio\rlge.exe
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Executes dropped EXE
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:4448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\ptbio\rlge.exe

Filesize
1.6MB

MD5
8c767708c9a9554c0afb504629e75ffd

SHA1
c65394806c0f77af880c7ff8a021bd4222ca3f11

SHA256
dcb373f73cc5e29881b6c97f753da1db91becee01b5eade03b0fd217d10b4e7d

SHA512
f9531159b45f92db319f351ebf4dadf9ba3c413e87da401a0af81d25a446084ed30dee670462292b989e1c9b0074a3c2ae76bb8a1d992e4407f72360303b4e16

Download Submit
C:\Windows\Tasks\Test Task17.job

Filesize
232B

MD5
93df97b842844b855e1c147825f7d38d

SHA1
057a6d8b9637914f94d88a5efcf3f2cd14cd8e22

SHA256
75ba40d20879a9b233a9b9ba34f108609f78522e402932db1466d8dc31ef3c5e

SHA512
e0d6918aac6e2a5e4254dc849d5a8086c7ff90d2d8671ba72b5093edabbfd009e803d1a6228771be28aff16fe9caa50885cff32c60d20ace79269113b0d8a1f2

Download Submit
memory/4448-24-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-20-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-32-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-31-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-19-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-30-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-29-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-17-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-27-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-26-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-15-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-25-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-21-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4448-28-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-11-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-2-0x0000000000401000-0x0000000000403000-memory.dmp

Filesize
8KB

Download
memory/4924-3-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-22-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-23-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-0-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-1-0x0000000077264000-0x0000000077266000-memory.dmp

Filesize
8KB

Download
memory/4924-8-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-12-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-18-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-10-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-9-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-7-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download
memory/4924-6-0x0000000000400000-0x0000000000823000-memory.dmp

Filesize
4.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads