dcrat | 1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459

General

Target

1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
Size

2.1MB
MD5

96affeab8e13743e57269977f1805472
SHA1

8935028d2abde57185acd3e1f59d831cc6ac5bc0
SHA256

1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459
SHA512

a8a1c5c302f6d51a7d390bf47ee0b4e2513498fec1081ffd2ec819133149c59c6b6bac7f6c8e7d7bd0e557c4f77f2789324cae8ccda90e1d60b3906b5d448fea
SSDEEP

49152:Cx55PUIP9xbGEfCErDBBDNvlbslAIETt1TIo3sa:klP9hAqXN6EHTj3sa

Score

10^/10

dcrat infostealer persistence 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 family
dcrat

Process spawned unexpected child process 7 IoCs

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

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2696	2824	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2552	2824	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2580	2824	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2688	2824	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2556	2824	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2148	2824	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2088	2824	schtasks.exe

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
behavioral1/memory/2392-1-0x0000000000AD0000-0x0000000000CFC000-memory.dmp	dcrat
C:\Windows\Panther\setup.exe\WMIADAP.exe	dcrat
behavioral1/memory/1684-25-0x0000000001350000-0x000000000157C000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

Processes:

dllhost.exe

pid process

1684 dllhost.exe

pid	process
1684	dllhost.exe

Adds Run key to start application 2 TTPs 7 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Recovery\\1f276ee2-69f6-11ef-8b31-62cb582c238c\\wininit.exe\""	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\MSOCache\\All Users\\{90140000-0011-0000-0000-0000000FF1CE}-C\\dllhost.exe\""	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\api-ms-win-core-sysinfo-l1-1-0\\spoolsv.exe\""	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Windows\\System32\\wbem\\mswmdm\\WmiPrvSE.exe\""	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\C_1026\\lsm.exe\""	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WMIADAP = "\"C:\\Windows\\Panther\\setup.exe\\WMIADAP.exe\""	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\MSOCache\\All Users\\{90140000-001A-0409-0000-0000000FF1CE}-C\\OSPPSVC.exe\""	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe

Drops file in System32 directory 6 IoCs

Processes:

1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe

description	ioc	process
File created	C:\Windows\System32\api-ms-win-core-sysinfo-l1-1-0\spoolsv.exe	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
File created	C:\Windows\System32\api-ms-win-core-sysinfo-l1-1-0\f3b6ecef712a24f33798f5d2fb3790c3d9b894c4	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
File created	C:\Windows\System32\wbem\mswmdm\WmiPrvSE.exe	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
File created	C:\Windows\System32\wbem\mswmdm\24dbde2999530ef5fd907494bc374d663924116c	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
File created	C:\Windows\System32\C_1026\lsm.exe	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
File created	C:\Windows\System32\C_1026\101b941d020240259ca4912829b53995ad543df6	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe

Drops file in Windows directory 2 IoCs

Processes:

1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe

description	ioc	process
File created	C:\Windows\Panther\setup.exe\WMIADAP.exe	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
File created	C:\Windows\Panther\setup.exe\75a57c1bdf437c0c81ad56e81f43c7323ed35745	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

2556 schtasks.exe
2148 schtasks.exe
2088 schtasks.exe
2696 schtasks.exe
2552 schtasks.exe
2580 schtasks.exe
2688 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exedllhost.exe

pid process

2392 1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
1684 dllhost.exe
1684 dllhost.exe

pid	process
2556	schtasks.exe
2148	schtasks.exe
2088	schtasks.exe
2696	schtasks.exe
2552	schtasks.exe
2580	schtasks.exe
2688	schtasks.exe

pid	process
2392	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
1684	dllhost.exe
1684	dllhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exedllhost.exe

description	pid	process
Token: SeDebugPrivilege	2392	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
Token: SeDebugPrivilege	1684	dllhost.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.execmd.exe

description	pid	process	target process
PID 2392 wrote to memory of 1896	2392	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe	cmd.exe
PID 2392 wrote to memory of 1896	2392	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe	cmd.exe
PID 2392 wrote to memory of 1896	2392	1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe	cmd.exe
PID 1896 wrote to memory of 844	1896	cmd.exe	w32tm.exe
PID 1896 wrote to memory of 844	1896	cmd.exe	w32tm.exe
PID 1896 wrote to memory of 844	1896	cmd.exe	w32tm.exe
PID 1896 wrote to memory of 1684	1896	cmd.exe	dllhost.exe
PID 1896 wrote to memory of 1684	1896	cmd.exe	dllhost.exe
PID 1896 wrote to memory of 1684	1896	cmd.exe	dllhost.exe

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\1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe
"C:\Users\Admin\AppData\Local\Temp\1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\HKxy6Fqr82.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1896
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:844
- - C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\dllhost.exe
    "C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\dllhost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2696

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\api-ms-win-core-sysinfo-l1-1-0\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2552

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\mswmdm\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2580

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\C_1026\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Windows\Panther\setup.exe\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\1f276ee2-69f6-11ef-8b31-62cb582c238c\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2088

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\HKxy6Fqr82.bat

Filesize
238B

MD5
215f5d0e02df9f0937900ebb8d83391f

SHA1
40f51025bed6395bcba6b02d42509d808a996dbe

SHA256
196911071750c58ed0326a1c02304e9038fea006baf1f787e5ad2fdd1c6b3d65

SHA512
cc82b05be5357047dc2bae67e97f1926993467ef1cac20c9eb88073edbad74ee3f905c0daf97d784f42fad3ba1e34ef4d71f0b32675f9c4372f2ab3d04513b24

Download Submit
C:\Windows\Panther\setup.exe\WMIADAP.exe

Filesize
2.1MB

MD5
96affeab8e13743e57269977f1805472

SHA1
8935028d2abde57185acd3e1f59d831cc6ac5bc0

SHA256
1a23b06a1a5708eb5557d8ba9c15d4c4608875a9d128d358a75f2c4344081459

SHA512
a8a1c5c302f6d51a7d390bf47ee0b4e2513498fec1081ffd2ec819133149c59c6b6bac7f6c8e7d7bd0e557c4f77f2789324cae8ccda90e1d60b3906b5d448fea

Download Submit
memory/1684-31-0x0000000000520000-0x000000000052A000-memory.dmp

Filesize
40KB

Download
memory/1684-30-0x0000000000D00000-0x0000000000D56000-memory.dmp

Filesize
344KB

Download
memory/1684-35-0x0000000000710000-0x0000000000718000-memory.dmp

Filesize
32KB

Download
memory/1684-36-0x0000000000720000-0x0000000000728000-memory.dmp

Filesize
32KB

Download
memory/1684-25-0x0000000001350000-0x000000000157C000-memory.dmp

Filesize
2.2MB

Download
memory/1684-26-0x0000000000250000-0x000000000025C000-memory.dmp

Filesize
48KB

Download
memory/1684-27-0x0000000000260000-0x0000000000268000-memory.dmp

Filesize
32KB

Download
memory/1684-29-0x0000000000500000-0x000000000050E000-memory.dmp

Filesize
56KB

Download
memory/1684-28-0x00000000004F0000-0x00000000004F8000-memory.dmp

Filesize
32KB

Download
memory/1684-37-0x0000000000730000-0x000000000073A000-memory.dmp

Filesize
40KB

Download
memory/1684-34-0x0000000000700000-0x0000000000708000-memory.dmp

Filesize
32KB

Download
memory/1684-32-0x00000000006E0000-0x00000000006E8000-memory.dmp

Filesize
32KB

Download
memory/1684-33-0x00000000006F0000-0x00000000006FC000-memory.dmp

Filesize
48KB

Download
memory/2392-0-0x000007FEF4E53000-0x000007FEF4E54000-memory.dmp

Filesize
4KB

Download
memory/2392-2-0x000007FEF4E50000-0x000007FEF583C000-memory.dmp

Filesize
9.9MB

Download
memory/2392-1-0x0000000000AD0000-0x0000000000CFC000-memory.dmp

Filesize
2.2MB

Download
memory/2392-21-0x000007FEF4E50000-0x000007FEF583C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads