dcrat | a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409

General

Target

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
Size

3.9MB
MD5

84c119baf2964e44d504f6172d89f593
SHA1

d74042f52d0a2d5cd4543b6c4a8e31b8a4c5bee4
SHA256

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409
SHA512

3dcac82230c278b8a1c4e063d79bd308c8e8ee65e71d8e0b371ac8520049fd2a863bc0b9b910989a5e310534aea6fe1274c2774e755ca701b977f8bc983bef6b

Score

10^/10

dcrat evasion infostealer rat themida trojan

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

DCRat payload 7 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral2/memory/4648-135-0x00000000005A0000-0x0000000001012000-memory.dmp	dcrat
behavioral2/memory/4648-136-0x00000000005A0000-0x0000000001012000-memory.dmp	dcrat
behavioral2/memory/4648-148-0x00000000005A0000-0x0000000001012000-memory.dmp	dcrat
behavioral2/memory/3876-150-0x0000000000BE0000-0x0000000001652000-memory.dmp	dcrat
behavioral2/memory/3876-155-0x0000000000BE0000-0x0000000001652000-memory.dmp	dcrat
behavioral2/memory/3876-156-0x0000000000BE0000-0x0000000001652000-memory.dmp	dcrat
behavioral2/memory/3876-159-0x0000000000BE0000-0x0000000001652000-memory.dmp	dcrat

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

Processes:

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exeexplorer.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	explorer.exe

Executes dropped EXE 1 IoCs

Processes:

explorer.exe

pid process

3876 explorer.exe

pid	process
3876	explorer.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

Processes:

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exeexplorer.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe

Themida packer 8 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral2/memory/4648-135-0x00000000005A0000-0x0000000001012000-memory.dmp	themida
behavioral2/memory/4648-136-0x00000000005A0000-0x0000000001012000-memory.dmp	themida
C:\Users\explorer.exe	themida
C:\Documents and Settings\explorer.exe	themida
behavioral2/memory/4648-148-0x00000000005A0000-0x0000000001012000-memory.dmp	themida
behavioral2/memory/3876-155-0x0000000000BE0000-0x0000000001652000-memory.dmp	themida
behavioral2/memory/3876-156-0x0000000000BE0000-0x0000000001652000-memory.dmp	themida
behavioral2/memory/3876-159-0x0000000000BE0000-0x0000000001652000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exeexplorer.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	explorer.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exeexplorer.exe

pid process

4648 a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
3876 explorer.exe
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid process

4720 schtasks.exe
4120 schtasks.exe
4480 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exeexplorer.exe

pid process

4648 a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
3876 explorer.exe

pid	process
4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
3876	explorer.exe

pid	process
4720	schtasks.exe
4120	schtasks.exe
4480	schtasks.exe

pid	process
4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
3876	explorer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exeexplorer.exe

description	pid	process
Token: SeDebugPrivilege	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
Token: SeDebugPrivilege	3876	explorer.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe

description	pid	process	target process
PID 4648 wrote to memory of 4120	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 4120	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 4120	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 4480	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 4480	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 4480	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 4720	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 4720	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 4720	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	schtasks.exe
PID 4648 wrote to memory of 3876	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	explorer.exe
PID 4648 wrote to memory of 3876	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	explorer.exe
PID 4648 wrote to memory of 3876	4648	a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe	explorer.exe

C:\Users\Admin\AppData\Local\Temp\a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe
"C:\Users\Admin\AppData\Local\Temp\a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4648

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default User\services.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4120

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Documents and Settings\OfficeClickToRun.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4480

C:\Windows\SysWOW64\schtasks.exe
"schtasks" /create /tn "explorer" /sc ONLOGON /tr "'C:\Documents and Settings\explorer.exe'" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4720

C:\Documents and Settings\explorer.exe
"C:\Documents and Settings\explorer.exe"
2⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Executes dropped EXE
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3876

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

Virtualization/Sandbox Evasion

1

T1497

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Documents and Settings\explorer.exe
Filesize
3.9MB

MD5
84c119baf2964e44d504f6172d89f593

SHA1
d74042f52d0a2d5cd4543b6c4a8e31b8a4c5bee4

SHA256
a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409

SHA512
3dcac82230c278b8a1c4e063d79bd308c8e8ee65e71d8e0b371ac8520049fd2a863bc0b9b910989a5e310534aea6fe1274c2774e755ca701b977f8bc983bef6b

Download Submit
C:\Users\explorer.exe
Filesize
3.9MB

MD5
84c119baf2964e44d504f6172d89f593

SHA1
d74042f52d0a2d5cd4543b6c4a8e31b8a4c5bee4

SHA256
a753520f6e10b07283488893315f3c5e03fbed7e27b303e95934d62f1acaa409

SHA512
3dcac82230c278b8a1c4e063d79bd308c8e8ee65e71d8e0b371ac8520049fd2a863bc0b9b910989a5e310534aea6fe1274c2774e755ca701b977f8bc983bef6b

Download Submit
memory/3876-157-0x0000000077C90000-0x0000000077E33000-memory.dmp

Filesize
1.6MB

Download
memory/3876-145-0x0000000000000000-mapping.dmp

Download
memory/3876-156-0x0000000000BE0000-0x0000000001652000-memory.dmp

Filesize
10.4MB

Download
memory/3876-155-0x0000000000BE0000-0x0000000001652000-memory.dmp

Filesize
10.4MB

Download
memory/3876-152-0x0000000077C90000-0x0000000077E33000-memory.dmp

Filesize
1.6MB

Download
memory/3876-151-0x0000000000BE0000-0x0000000001652000-memory.dmp

Filesize
10.4MB

Download
memory/3876-150-0x0000000000BE0000-0x0000000001652000-memory.dmp

Filesize
10.4MB

Download
memory/3876-158-0x0000000077C90000-0x0000000077E33000-memory.dmp

Filesize
1.6MB

Download
memory/3876-159-0x0000000000BE0000-0x0000000001652000-memory.dmp

Filesize
10.4MB

Download
memory/4120-142-0x0000000000000000-mapping.dmp

Download
memory/4480-143-0x0000000000000000-mapping.dmp

Download
memory/4648-138-0x0000000005B10000-0x0000000005B76000-memory.dmp

Filesize
408KB

Download
memory/4648-141-0x0000000077C90000-0x0000000077E33000-memory.dmp

Filesize
1.6MB

Download
memory/4648-148-0x00000000005A0000-0x0000000001012000-memory.dmp

Filesize
10.4MB

Download
memory/4648-149-0x0000000077C90000-0x0000000077E33000-memory.dmp

Filesize
1.6MB

Download
memory/4648-140-0x0000000006920000-0x00000000069BC000-memory.dmp

Filesize
624KB

Download
memory/4648-139-0x0000000006880000-0x0000000006912000-memory.dmp

Filesize
584KB

Download
memory/4648-130-0x00000000005A0000-0x0000000001012000-memory.dmp

Filesize
10.4MB

Download
memory/4648-137-0x0000000006030000-0x00000000065D4000-memory.dmp

Filesize
5.6MB

Download
memory/4648-136-0x00000000005A0000-0x0000000001012000-memory.dmp

Filesize
10.4MB

Download
memory/4648-135-0x00000000005A0000-0x0000000001012000-memory.dmp

Filesize
10.4MB

Download
memory/4648-132-0x0000000077C90000-0x0000000077E33000-memory.dmp

Filesize
1.6MB

Download
memory/4648-131-0x00000000005A0000-0x0000000001012000-memory.dmp

Filesize
10.4MB

Download
memory/4720-144-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads