dcrat | 36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496

General

Target

36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe
Size

1.1MB
MD5

150550df367f8d6334843deee8de66a3
SHA1

8edcd7ff34e8c4a6cbc74fe57c831e5c400783f4
SHA256

36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496
SHA512

427afc1255c109d47c1b879ba84c98225becd644cea03a4b926679381a73aeb6760bd974af558f667fd2588077ba701e8193a20c788bfd5a601dfa5f4712438c
SSDEEP

24576:U2G/nvxW3Ww0tWumqZzVuY4G+bGGnHkUeaC6qEKKH8:UbA30iyuY4GEHkZ2KF

Score

10^/10

dcrat discovery infostealer rat

Malware Config

Signatures

DcRat 23 IoCs

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

rat infostealer dcrat

description	ioc	pid	Process
		884	schtasks.exe
		2888	schtasks.exe
		2892	schtasks.exe
		2056	schtasks.exe
		1808	schtasks.exe
		2760	schtasks.exe
		2356	schtasks.exe
		1092	schtasks.exe
		2700	schtasks.exe
		1196	schtasks.exe
		2180	schtasks.exe
		2116	schtasks.exe
		2676	schtasks.exe
		2664	schtasks.exe
		1292	schtasks.exe
		1296	schtasks.exe
		2620	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language		36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe
File created	C:\Program Files\Windows Photo Viewer\de-DE\ebf1f9fa8afd6d		blockport.exe
		3052	schtasks.exe
		2632	schtasks.exe
		1940	schtasks.exe
		1988	schtasks.exe

Dcrat family
dcrat

Process spawned unexpected child process 21 IoCs

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

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2760	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2632	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2356	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1808	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2620	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2676	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1092	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	884	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1940	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2888	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2892	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2664	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1292	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1296	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1196	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2056	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3052	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1988	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2180	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2700	2732	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2116	2732	schtasks.exe	35

DCRat payload 4 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0006000000018634-11.dat	dcrat
behavioral1/memory/796-13-0x0000000001020000-0x00000000010F6000-memory.dmp	dcrat
behavioral1/memory/768-24-0x0000000001380000-0x0000000001456000-memory.dmp	dcrat
behavioral1/memory/1856-41-0x00000000012A0000-0x0000000001376000-memory.dmp	dcrat

Executes dropped EXE 3 IoCs

pid	Process
796	blockport.exe
768	blockport.exe
1856	WmiPrvSE.exe

Loads dropped DLL 2 IoCs

pid	Process
2840	cmd.exe
2840	cmd.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Photo Viewer\de-DE\cmd.exe	blockport.exe
File created	C:\Program Files\Windows Photo Viewer\de-DE\ebf1f9fa8afd6d	blockport.exe
File created	C:\Program Files\Windows Sidebar\it-IT\explorer.exe	blockport.exe
File created	C:\Program Files\Windows Sidebar\it-IT\7a0fd90576e088	blockport.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Globalization\OSPPSVC.exe	blockport.exe
File created	C:\Windows\Globalization\1610b97d3ab4a7	blockport.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 21 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2632	schtasks.exe
1940	schtasks.exe
1296	schtasks.exe
3052	schtasks.exe
2116	schtasks.exe
2760	schtasks.exe
2620	schtasks.exe
2676	schtasks.exe
884	schtasks.exe
2664	schtasks.exe
2180	schtasks.exe
2356	schtasks.exe
1808	schtasks.exe
1092	schtasks.exe
2888	schtasks.exe
2892	schtasks.exe
1196	schtasks.exe
1292	schtasks.exe
2056	schtasks.exe
1988	schtasks.exe
2700	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
796	blockport.exe
768	blockport.exe
1856	WmiPrvSE.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	796	blockport.exe
Token: SeDebugPrivilege	768	blockport.exe
Token: SeDebugPrivilege	1856	WmiPrvSE.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 2540	1728	36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe	30
PID 1728 wrote to memory of 2540	1728	36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe	30
PID 1728 wrote to memory of 2540	1728	36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe	30
PID 1728 wrote to memory of 2540	1728	36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe	30
PID 2540 wrote to memory of 2840	2540	WScript.exe	31
PID 2540 wrote to memory of 2840	2540	WScript.exe	31
PID 2540 wrote to memory of 2840	2540	WScript.exe	31
PID 2540 wrote to memory of 2840	2540	WScript.exe	31
PID 2840 wrote to memory of 796	2840	cmd.exe	34
PID 2840 wrote to memory of 796	2840	cmd.exe	34
PID 2840 wrote to memory of 796	2840	cmd.exe	34
PID 2840 wrote to memory of 796	2840	cmd.exe	34
PID 796 wrote to memory of 2172	796	blockport.exe	42
PID 796 wrote to memory of 2172	796	blockport.exe	42
PID 796 wrote to memory of 2172	796	blockport.exe	42
PID 2172 wrote to memory of 1320	2172	cmd.exe	44
PID 2172 wrote to memory of 1320	2172	cmd.exe	44
PID 2172 wrote to memory of 1320	2172	cmd.exe	44
PID 2172 wrote to memory of 768	2172	cmd.exe	45
PID 2172 wrote to memory of 768	2172	cmd.exe	45
PID 2172 wrote to memory of 768	2172	cmd.exe	45
PID 768 wrote to memory of 1856	768	blockport.exe	61
PID 768 wrote to memory of 1856	768	blockport.exe	61
PID 768 wrote to memory of 1856	768	blockport.exe	61

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe
"C:\Users\Admin\AppData\Local\Temp\36fce76e89c0c4e4798956b61abad0e5e28e0732763699ce3c5003518b643496.exe"
1⤵
- DcRat
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\FontrefPerfmonitor\C7WmfIuC8zQxx.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\FontrefPerfmonitor\6xajXYt4OYp.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2840
  - - C:\FontrefPerfmonitor\blockport.exe
      "C:\FontrefPerfmonitor\blockport.exe"
      4⤵
      DcRat
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:796
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\yDWQnRz0r7.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2172
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:1320
      - C:\FontrefPerfmonitor\blockport.exe
        
        "C:\FontrefPerfmonitor\blockport.exe"
        6⤵
        Executes dropped EXE
        Drops file in Program Files directory
        Drops file in Windows directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:768
        
        C:\Users\Admin\Application Data\WmiPrvSE.exe
        
        "C:\Users\Admin\Application Data\WmiPrvSE.exe"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Users\Default\Recent\csrss.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Default\Recent\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2632

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Users\Default\Recent\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2356

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Photo Viewer\de-DE\cmd.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1808

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\de-DE\cmd.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2620

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Photo Viewer\de-DE\cmd.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "blockportb" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.fr\blockport.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:884

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "blockport" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.fr\blockport.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1092

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "blockportb" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.fr\blockport.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1940

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 8 /tr "'C:\Users\Admin\Application Data\WmiPrvSE.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2888

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Users\Admin\Application Data\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2892

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Application Data\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Sidebar\it-IT\explorer.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1292

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\it-IT\explorer.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorere" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Sidebar\it-IT\explorer.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1196

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 6 /tr "'C:\Windows\Globalization\OSPPSVC.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2056

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Windows\Globalization\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3052

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 9 /tr "'C:\Windows\Globalization\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1988

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\lsass.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2180

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\lsass.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\lsass.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\FontrefPerfmonitor\6xajXYt4OYp.bat

Filesize
37B

MD5
ce8d79d29a7f61ae455fbd0c51c15979

SHA1
bf8b31f3c60f4476bd8d4a332349fa44d207cfcd

SHA256
0282418c33a1d8ffd54f1bfd91c9ba3a5a9dcd94f8010cdb4ac6288b8b6e40a3

SHA512
f6b6ee7b1a1b6cebcce206195e90914022bb4c462c670e8f86f282df639b30dd75dec2e10e450162f20a58460fa19da9397c577ec108f7cca3bcb09137964f07

Download Submit
C:\FontrefPerfmonitor\C7WmfIuC8zQxx.vbe

Filesize
206B

MD5
3db2d6374a93b64353f37f61b091fa26

SHA1
94bf44c5b3687ada88a193b97ecbf9ff50350f65

SHA256
3b1c7f9549b2d3a4c9053f5d17b85388828351633b827849a12056bfdc4db0b7

SHA512
10edee575fb1c8c3b7769c66898b2164eb9c4bcda85ffdac55bc674b1692bffd4537eb336dc1d599dae50b16efe0382a568175f2c2a88eebd676a3bd55642e6d

Download Submit
C:\Users\Admin\AppData\Local\Temp\yDWQnRz0r7.bat

Filesize
200B

MD5
a1f108f653ee598669d38f0a381ffc76

SHA1
d41283df8798886f264b5ebd0343138777ab6da8

SHA256
53a8768fad277ddc5941de89e7f1e9f3917b4ff72f0b84bb62a247c4c8d7f57d

SHA512
0416196ca297cea4aaed5f0fcdb07649243de6d04f7ecd136ddda77255ebcdc7fdb228f2ab853fbc34bedb464b294e6f841992e550ad58b6df686202708b5206

Download Submit
\FontrefPerfmonitor\blockport.exe

Filesize
829KB

MD5
78a0654a256451e953d47049aaa60200

SHA1
85eba2ba3f585a889380841c991937448ba61066

SHA256
271009f132fc388837832a08962ff48c1e76372e047b31cce3db4ad047746855

SHA512
71cd1ddf7defc16a65db41aa0f93c55690e7c0dbbee04df8bc7efcffa251c9bbbeb6a471e02c621fc1767c19861d787d53bddfdab36d57d081cf875348b636b3

Download Submit
memory/768-24-0x0000000001380000-0x0000000001456000-memory.dmp

Filesize
856KB

Download
memory/796-13-0x0000000001020000-0x00000000010F6000-memory.dmp

Filesize
856KB

Download
memory/1856-41-0x00000000012A0000-0x0000000001376000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads