dcrat | 0f90a3fb2e4ac65e616b0fa6be1ebb35702004daca90715e5a49c90966e32b7f

General

Target

AntiHacks.exe
Size

3.2MB
MD5

51f3f8f434490126a3de0a6e798b7bc7
SHA1

6cb3884386c2a9c59f26cf233346c63b99f29609
SHA256

0f90a3fb2e4ac65e616b0fa6be1ebb35702004daca90715e5a49c90966e32b7f
SHA512

961bc68028ac11d10ceef123b2eacee3f30b78846b0edd127e8c55375cc2ef3e6db4113b40f1aa59310a7e6e7980a826307e6b08279de616d32667e5ab448bd2
SSDEEP

98304:Gb48Bs73qkzcQ9TRxouOJDBjcQI258AXn:GLs51oJ5ZcQIPAXn

Score

10^/10

dcrat discovery evasion infostealer rat

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 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe	dcrat
\SurrogatewinDrivernetsvc\portproviderperf.exe	dcrat
behavioral1/memory/2488-33-0x00000000012B0000-0x0000000001566000-memory.dmp	dcrat

Disables Task Manager via registry modification
evasion
Executes dropped EXE 3 IoCs

Processes:

shellbag.exeDCRatBuild.exeportproviderperf.exe

pid process

2920 shellbag.exe
2620 DCRatBuild.exe
2488 portproviderperf.exe
Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid process

2544 cmd.exe
2544 cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2920	shellbag.exe
2620	DCRatBuild.exe
2488	portproviderperf.exe

pid	process
2544	cmd.exe
2544	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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

Processes:

cmd.exereg.exeshellbag.exeDCRatBuild.exeWScript.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	shellbag.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DCRatBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

2936 reg.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

portproviderperf.exe

description pid process

Token: SeDebugPrivilege 2488 portproviderperf.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

shellbag.exe

pid process

2920 shellbag.exe
2920 shellbag.exe

pid	process
2936	reg.exe

description	pid	process
Token: SeDebugPrivilege	2488	portproviderperf.exe

pid	process
2920	shellbag.exe
2920	shellbag.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

AntiHacks.exeDCRatBuild.exeWScript.execmd.exe

description	pid	process	target process
PID 1188 wrote to memory of 2920	1188	AntiHacks.exe	shellbag.exe
PID 1188 wrote to memory of 2920	1188	AntiHacks.exe	shellbag.exe
PID 1188 wrote to memory of 2920	1188	AntiHacks.exe	shellbag.exe
PID 1188 wrote to memory of 2920	1188	AntiHacks.exe	shellbag.exe
PID 1188 wrote to memory of 2620	1188	AntiHacks.exe	DCRatBuild.exe
PID 1188 wrote to memory of 2620	1188	AntiHacks.exe	DCRatBuild.exe
PID 1188 wrote to memory of 2620	1188	AntiHacks.exe	DCRatBuild.exe
PID 1188 wrote to memory of 2620	1188	AntiHacks.exe	DCRatBuild.exe
PID 2620 wrote to memory of 2600	2620	DCRatBuild.exe	WScript.exe
PID 2620 wrote to memory of 2600	2620	DCRatBuild.exe	WScript.exe
PID 2620 wrote to memory of 2600	2620	DCRatBuild.exe	WScript.exe
PID 2620 wrote to memory of 2600	2620	DCRatBuild.exe	WScript.exe
PID 2600 wrote to memory of 2544	2600	WScript.exe	cmd.exe
PID 2600 wrote to memory of 2544	2600	WScript.exe	cmd.exe
PID 2600 wrote to memory of 2544	2600	WScript.exe	cmd.exe
PID 2600 wrote to memory of 2544	2600	WScript.exe	cmd.exe
PID 2544 wrote to memory of 2488	2544	cmd.exe	portproviderperf.exe
PID 2544 wrote to memory of 2488	2544	cmd.exe	portproviderperf.exe
PID 2544 wrote to memory of 2488	2544	cmd.exe	portproviderperf.exe
PID 2544 wrote to memory of 2488	2544	cmd.exe	portproviderperf.exe
PID 2544 wrote to memory of 2936	2544	cmd.exe	reg.exe
PID 2544 wrote to memory of 2936	2544	cmd.exe	reg.exe
PID 2544 wrote to memory of 2936	2544	cmd.exe	reg.exe
PID 2544 wrote to memory of 2936	2544	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\AntiHacks.exe
"C:\Users\Admin\AppData\Local\Temp\AntiHacks.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1188

C:\Users\Admin\AppData\Local\Temp\shellbag.exe
"C:\Users\Admin\AppData\Local\Temp\shellbag.exe"
2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:2920

C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe
"C:\Users\Admin\AppData\Local\Temp\DCRatBuild.exe"
2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2620

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\SurrogatewinDrivernetsvc\hZpCHdrrkYqoUKjGmjoCABdT0Mwga.vbe"
3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2600

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\SurrogatewinDrivernetsvc\kRWKyWxgyfXKFYDJbe5lkOMuBgOX.bat" "
4⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2544

C:\SurrogatewinDrivernetsvc\portproviderperf.exe
"C:\SurrogatewinDrivernetsvc\portproviderperf.exe"
5⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2488

C:\Windows\SysWOW64\reg.exe
reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
5⤵
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\SurrogatewinDrivernetsvc\hZpCHdrrkYqoUKjGmjoCABdT0Mwga.vbe

Filesize
229B

MD5
70c4f7a48cc54536765cbe30c9e47c6e

SHA1
f63921139417cff273730cd18dc9176e667945b4

SHA256
ed2cfa0c8ae5bc530785c560182072e1b15e4fcae1c436bacf4d4e57f2b0bdae

SHA512
e011926a03a6d8b53a67047304af3f15a5f15fe1f2815c9d4072a78fe726516c56815b3c292848472176d4a45c5acb91134b19c8e2e9bd714ce912649f19985a

Download Submit
C:\SurrogatewinDrivernetsvc\kRWKyWxgyfXKFYDJbe5lkOMuBgOX.bat

Filesize
162B

MD5
e01ef91219b266b14d1ae415d30256d5

SHA1
cad006a2efee48fcad1166e7ce3bc118ff139808

SHA256
db58b3dde8508ecbe59d938545246355b52d9cdec29f76657b66638c4d7aeeb2

SHA512
7826ca4bda02431bff87c7c72bd1ea53bc769b8574302a37445318360326e5a89e309c35dbc8f9981ec35c5067b4a459195b78d0289f5d93f6ec54be4c3f1e7b

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

Filesize
3.0MB

MD5
394e0a2c7324c2f5cf8e53858c767f15

SHA1
c3bcd6fb8519d59b997389acd25350e92b6d31b3

SHA256
b8debcd7180cabc4285659089162f4a776c11e11545aeaa4505dc93c38c24c2a

SHA512
64c1daaf37ae3f43fbc92fad10969106cce6acdecfb6319e089b7b3b9596efe7924d2bd3e30eb250ac3e36a01604522eb902e059985b9af50572395f79bfb212

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

Filesize
1.6MB

MD5
463058236a0d84f8f8982d946eed0e07

SHA1
800ab71ed3b3bf4fb67fc9e1628e59d0aab8b124

SHA256
c93a0f4c6b5f24ee31cddb92b0ea3337021b5fb91faae8a381d3bd2c9b6add54

SHA512
18bd9aea8489c5e873a679da92c83d2739de9532f5751bd23aea9eda226b9a95909f8fd525b0ce47859492997002aee32ecf37bb79e07f24b512287b8fd58a53

Download Submit
\SurrogatewinDrivernetsvc\portproviderperf.exe

Filesize
2.7MB

MD5
af8f3f95d9d2ef99d8df68cfead7aa05

SHA1
5096ae4648920f3378b83aae70990b0b4029e0b7

SHA256
3dc2710353e09dc4d910204932a19fe38787bf0a04d5de421816f0bdc6946d3c

SHA512
c4ef1523b373f9c7c8a30a9c7eb32c79928dbdb8744ef4c75d2ecb1dd27ee626f1a25ca30e82084928507f8abab0f9f02e127bb06c0ec195be9c74299cdb70c7

Download Submit
memory/1188-17-0x000007FEF4C20000-0x000007FEF560C000-memory.dmp

Filesize
9.9MB

Download
memory/1188-0-0x000007FEF4C23000-0x000007FEF4C24000-memory.dmp

Filesize
4KB

Download
memory/1188-4-0x000007FEF4C20000-0x000007FEF560C000-memory.dmp

Filesize
9.9MB

Download
memory/1188-1-0x000000013F1A0000-0x000000013F4D0000-memory.dmp

Filesize
3.2MB

Download
memory/2488-33-0x00000000012B0000-0x0000000001566000-memory.dmp

Filesize
2.7MB

Download
memory/2488-34-0x00000000004C0000-0x00000000004CE000-memory.dmp

Filesize
56KB

Download
memory/2920-11-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2920-16-0x0000000000400000-0x0000000000572000-memory.dmp

Filesize
1.4MB

Download
memory/2920-18-0x0000000000400000-0x0000000000572000-memory.dmp

Filesize
1.4MB

Download
memory/2920-12-0x0000000000409000-0x000000000040A000-memory.dmp

Filesize
4KB

Download
memory/2920-35-0x0000000000400000-0x0000000000572000-memory.dmp

Filesize
1.4MB

Download
memory/2920-37-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads