dcrat | b87a60099a45285a03886378f0786131c3fa551bd84bd6134f858703d17ab74a

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
18-11-2023 02:32

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General

Target

NEAS.93db67acc5572ee4096c1d1962766430.exe
Size

783KB
MD5

93db67acc5572ee4096c1d1962766430
SHA1

811ef2712a3b2a757b0efcd7fdb95cdea777111d
SHA256

b87a60099a45285a03886378f0786131c3fa551bd84bd6134f858703d17ab74a
SHA512

cc30b4df6ed1142b4344081f1ab19abc82f3556556871e540cac9149ab70465a35cc4d9224d9664b87bc4063d5b2f9b9fdb2c493b89c400a76bd25fb0dbaf6e8
SSDEEP

12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:G+OQbpbgsFdAyQvzSqaq8q

Score

10^/10

dcrat evasion infostealer persistence rat trojan

Malware Config

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 5 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	2516	2300	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2652	2300	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2504	2300	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2920	2300	schtasks.exe	28
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2932	2300	schtasks.exe	28

UAC bypass 3 TTPs 6 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	NEAS.93db67acc5572ee4096c1d1962766430.exe

DCRat payload 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2152-0-0x0000000000AB0000-0x0000000000B7A000-memory.dmp	dcrat
behavioral1/files/0x00050000000193c3-32.dat	dcrat
behavioral1/files/0x00070000000194a3-81.dat	dcrat
behavioral1/files/0x00070000000194a3-82.dat	dcrat
behavioral1/memory/2084-83-0x0000000001040000-0x000000000110A000-memory.dmp	dcrat
behavioral1/memory/2084-85-0x000000001B140000-0x000000001B1C0000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2084	csrss.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\ticrf\\lsm.exe\""	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\System32\\WMPhoto\\csrss.exe\""	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\ProgramData\\Microsoft Help\\wininit.exe\""	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\PerfLogs\\Admin\\services.exe\""	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Windows\\System32\\vccorlib140\\services.exe\""	NEAS.93db67acc5572ee4096c1d1962766430.exe

Checks whether UAC is enabled 1 TTPs 4 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	NEAS.93db67acc5572ee4096c1d1962766430.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	csrss.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\System32\WMPhoto\886983d96e3d3e31032c679b2d4ea91b6c05afef	NEAS.93db67acc5572ee4096c1d1962766430.exe
File created	C:\Windows\System32\vccorlib140\services.exe	NEAS.93db67acc5572ee4096c1d1962766430.exe
File created	C:\Windows\System32\vccorlib140\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	NEAS.93db67acc5572ee4096c1d1962766430.exe
File opened for modification	C:\Windows\System32\ticrf\RCX7D1D.tmp	NEAS.93db67acc5572ee4096c1d1962766430.exe
File opened for modification	C:\Windows\System32\WMPhoto\RCX7F21.tmp	NEAS.93db67acc5572ee4096c1d1962766430.exe
File opened for modification	C:\Windows\System32\WMPhoto\csrss.exe	NEAS.93db67acc5572ee4096c1d1962766430.exe
File opened for modification	C:\Windows\System32\ticrf\lsm.exe	NEAS.93db67acc5572ee4096c1d1962766430.exe
File created	C:\Windows\System32\ticrf\101b941d020240259ca4912829b53995ad543df6	NEAS.93db67acc5572ee4096c1d1962766430.exe
File opened for modification	C:\Windows\System32\vccorlib140\RCX8599.tmp	NEAS.93db67acc5572ee4096c1d1962766430.exe
File opened for modification	C:\Windows\System32\vccorlib140\services.exe	NEAS.93db67acc5572ee4096c1d1962766430.exe
File created	C:\Windows\System32\ticrf\lsm.exe	NEAS.93db67acc5572ee4096c1d1962766430.exe
File created	C:\Windows\System32\WMPhoto\csrss.exe	NEAS.93db67acc5572ee4096c1d1962766430.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 5 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2516	schtasks.exe
2652	schtasks.exe
2504	schtasks.exe
2920	schtasks.exe
2932	schtasks.exe

Modifies system certificate store 2 TTPs 6 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	csrss.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	csrss.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 040000000100000010000000410352dc0ff7501b16f0028eba6f45c50f00000001000000140000005bcaa1c2780f0bcb5a90770451d96f38963f012d0b000000010000001e000000440053005400200052006f006f0074002000430041002000580033000000090000000100000016000000301406082b0601050507030406082b06010505070301140000000100000014000000c4a7b1a47b2c71fadbe14b9075ffc415608589101d00000001000000100000004558d512eecb27464920897de7b66053030000000100000014000000dac9024f54d8f6df94935fb1732638ca6ad77c131900000001000000100000006cf252fec3e8f20996de5d4dd9aef42420000000010000004e0300003082034a30820232a003020102021044afb080d6a327ba893039862ef8406b300d06092a864886f70d0101050500303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f74204341205833301e170d3030303933303231313231395a170d3231303933303134303131355a303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f7420434120583330820122300d06092a864886f70d01010105000382010f003082010a0282010100dfafe99750088357b4cc6265f69082ecc7d32c6b30ca5becd9c37dc740c118148be0e83376492ae33f214993ac4e0eaf3e48cb65eefcd3210f65d22ad9328f8ce5f777b0127bb595c089a3a9baed732e7a0c063283a27e8a1430cd11a0e12a38b9790a31fd50bd8065dfb7516383c8e28861ea4b6181ec526bb9a2e24b1a289f48a39e0cda098e3e172e1edd20df5bc62a8aab2ebd70adc50b1a25907472c57b6aab34d63089ffe568137b540bc8d6aeec5a9c921e3d64b38cc6dfbfc94170ec1672d526ec38553943d0fcfd185c40f197ebd59a9b8d1dbada25b9c6d8dfc115023aabda6ef13e2ef55c089c3cd68369e4109b192ab62957e3e53d9b9ff0025d0203010001a3423040300f0603551d130101ff040530030101ff300e0603551d0f0101ff040403020106301d0603551d0e04160414c4a7b1a47b2c71fadbe14b9075ffc41560858910300d06092a864886f70d01010505000382010100a31a2c9b17005ca91eee2866373abf83c73f4bc309a095205de3d95944d23e0d3ebd8a4ba0741fce10829c741a1d7e981addcb134bb32044e491e9ccfc7da5db6ae5fee6fde04eddb7003ab57049aff2e5eb02f1d1028b19cb943a5e48c4181e58195f1e025af00cf1b1ada9dc59868b6ee991f586cafab96633aa595bcee2a7167347cb2bcc99b03748cfe3564bf5cf0f0c723287c6f044bb53726d43f526489a5267b758abfe67767178db0da256141339243185a2a8025a3047e1dd5007bc02099000eb6463609b16bc88c912e6d27d918bf93d328d65b4e97cb15776eac5b62839bf15651cc8f677966a0a8d770bd8910b048e07db29b60aee9d82353510	csrss.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe
2084	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2152	NEAS.93db67acc5572ee4096c1d1962766430.exe
Token: SeDebugPrivilege	2084	csrss.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 788	2152	NEAS.93db67acc5572ee4096c1d1962766430.exe	34
PID 2152 wrote to memory of 788	2152	NEAS.93db67acc5572ee4096c1d1962766430.exe	34
PID 2152 wrote to memory of 788	2152	NEAS.93db67acc5572ee4096c1d1962766430.exe	34
PID 788 wrote to memory of 2444	788	cmd.exe	36
PID 788 wrote to memory of 2444	788	cmd.exe	36
PID 788 wrote to memory of 2444	788	cmd.exe	36
PID 788 wrote to memory of 2084	788	cmd.exe	37
PID 788 wrote to memory of 2084	788	cmd.exe	37
PID 788 wrote to memory of 2084	788	cmd.exe	37

System policy modification 1 TTPs 6 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	csrss.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	NEAS.93db67acc5572ee4096c1d1962766430.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	NEAS.93db67acc5572ee4096c1d1962766430.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\NEAS.93db67acc5572ee4096c1d1962766430.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.93db67acc5572ee4096c1d1962766430.exe"
1⤵
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2152
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\SUoFbHmupk.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:788
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2444
- - C:\Windows\System32\WMPhoto\csrss.exe
    "C:\Windows\System32\WMPhoto\csrss.exe"
    3⤵
    - UAC bypass
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - Modifies system certificate store
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - System policy modification
    PID:2084

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\ticrf\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2516

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\WMPhoto\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2652

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\ProgramData\Microsoft Help\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2504

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\PerfLogs\Admin\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2920

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\vccorlib140\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
80fea5c2cbc8d93390441c81ddc5abe8

SHA1
f3a52805a26aaef15f812538efba1c2e822f5527

SHA256
ccd2a34713305c2f5c153dc1f1aad4d9b9c0fa856c57f54985e06bbb9181af4e

SHA512
d1b63cdbc95553da7691b9b3825515fe912483315ea2e3e7847a9cf167141d26309d286c524ef4f43ffce711f74f7aa9db2d105911d956561f7c2306dd047b3d

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabB35A.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

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

Filesize
201B

MD5
ecc6148435d6efce8eae415ee9f6554b

SHA1
07a97427f65b296efb3b58721b2ef853c7d59bd0

SHA256
0338fec493b4b5fb10ae260ab6877732e9690e21976351a09f527d628d4dcbe3

SHA512
486491b8cda691842537188be2701dc6476452d977b5b75d4846b4cb3c5b18b28ef3d2e57066f10c056825e39e6d366cbebab30ce7b8e1646f242a19de9b05d5

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarB408.tmp

Filesize
163KB

MD5
9441737383d21192400eca82fda910ec

SHA1
725e0d606a4fc9ba44aa8ffde65bed15e65367e4

SHA256
bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

SHA512
7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

Download Submit
C:\Windows\System32\WMPhoto\csrss.exe

Filesize
783KB

MD5
09dbadf467b9943775ca41371aadd8b5

SHA1
a742211d3663d4c66b8f50819c5fe7995f6b65f4

SHA256
4bdd3970202d52d6130bd4ef801d0c4c3393e07c2ffae29772a7a154e0a5adc7

SHA512
edeb9abfc6c23d3dad0ff44f561b6bac9ac0210bc57700eb3c4801c93b33d0cece1448bee8e74d5118b67733292c4fac117f7aaaf6bf4b93756c3ae82e61a5c6

Download Submit
C:\Windows\System32\WMPhoto\csrss.exe

Filesize
783KB

MD5
09dbadf467b9943775ca41371aadd8b5

SHA1
a742211d3663d4c66b8f50819c5fe7995f6b65f4

SHA256
4bdd3970202d52d6130bd4ef801d0c4c3393e07c2ffae29772a7a154e0a5adc7

SHA512
edeb9abfc6c23d3dad0ff44f561b6bac9ac0210bc57700eb3c4801c93b33d0cece1448bee8e74d5118b67733292c4fac117f7aaaf6bf4b93756c3ae82e61a5c6

Download Submit
C:\Windows\System32\vccorlib140\services.exe

Filesize
783KB

MD5
93db67acc5572ee4096c1d1962766430

SHA1
811ef2712a3b2a757b0efcd7fdb95cdea777111d

SHA256
b87a60099a45285a03886378f0786131c3fa551bd84bd6134f858703d17ab74a

SHA512
cc30b4df6ed1142b4344081f1ab19abc82f3556556871e540cac9149ab70465a35cc4d9224d9664b87bc4063d5b2f9b9fdb2c493b89c400a76bd25fb0dbaf6e8

Download Submit
memory/2084-87-0x000000001B140000-0x000000001B1C0000-memory.dmp

Filesize
512KB

Download
memory/2084-88-0x000000001B140000-0x000000001B1C0000-memory.dmp

Filesize
512KB

Download
memory/2084-86-0x000000001B140000-0x000000001B1C0000-memory.dmp

Filesize
512KB

Download
memory/2084-85-0x000000001B140000-0x000000001B1C0000-memory.dmp

Filesize
512KB

Download
memory/2084-84-0x000007FEF4E40000-0x000007FEF582C000-memory.dmp

Filesize
9.9MB

Download
memory/2084-83-0x0000000001040000-0x000000000110A000-memory.dmp

Filesize
808KB

Download
memory/2084-89-0x000000001B140000-0x000000001B1C0000-memory.dmp

Filesize
512KB

Download
memory/2084-99-0x000000001B140000-0x000000001B1C0000-memory.dmp

Filesize
512KB

Download
memory/2084-170-0x000007FEF4E40000-0x000007FEF582C000-memory.dmp

Filesize
9.9MB

Download
memory/2152-11-0x0000000000490000-0x0000000000498000-memory.dmp

Filesize
32KB

Download
memory/2152-80-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

Download
memory/2152-18-0x0000000001F90000-0x0000000001F98000-memory.dmp

Filesize
32KB

Download
memory/2152-20-0x0000000000A90000-0x0000000000A98000-memory.dmp

Filesize
32KB

Download
memory/2152-19-0x0000000000A80000-0x0000000000A88000-memory.dmp

Filesize
32KB

Download
memory/2152-21-0x0000000000A30000-0x0000000000A3C000-memory.dmp

Filesize
48KB

Download
memory/2152-22-0x000000001AFE0000-0x000000001B060000-memory.dmp

Filesize
512KB

Download
memory/2152-23-0x0000000000A70000-0x0000000000A78000-memory.dmp

Filesize
32KB

Download
memory/2152-15-0x0000000000A50000-0x0000000000A58000-memory.dmp

Filesize
32KB

Download
memory/2152-34-0x000000001AFE0000-0x000000001B060000-memory.dmp

Filesize
512KB

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memory/2152-38-0x000000001AFE0000-0x000000001B060000-memory.dmp

Filesize
512KB

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memory/2152-51-0x000000001AFE0000-0x000000001B060000-memory.dmp

Filesize
512KB

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memory/2152-66-0x000000001AFE0000-0x000000001B060000-memory.dmp

Filesize
512KB

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memory/2152-73-0x000000001AFE0000-0x000000001B060000-memory.dmp

Filesize
512KB

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memory/2152-16-0x0000000000A60000-0x0000000000A68000-memory.dmp

Filesize
32KB

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memory/2152-17-0x0000000001F80000-0x0000000001F88000-memory.dmp

Filesize
32KB

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memory/2152-14-0x0000000000A40000-0x0000000000A48000-memory.dmp

Filesize
32KB

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memory/2152-13-0x0000000000A20000-0x0000000000A28000-memory.dmp

Filesize
32KB

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memory/2152-12-0x0000000000A10000-0x0000000000A18000-memory.dmp

Filesize
32KB

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memory/2152-0-0x0000000000AB0000-0x0000000000B7A000-memory.dmp

Filesize
808KB

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memory/2152-10-0x00000000004C0000-0x00000000004C8000-memory.dmp

Filesize
32KB

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memory/2152-9-0x00000000004B0000-0x00000000004BA000-memory.dmp

Filesize
40KB

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memory/2152-8-0x00000000004A0000-0x00000000004AA000-memory.dmp

Filesize
40KB

Download
memory/2152-7-0x0000000000A00000-0x0000000000A0C000-memory.dmp

Filesize
48KB

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memory/2152-6-0x0000000000480000-0x0000000000488000-memory.dmp

Filesize
32KB

Download
memory/2152-4-0x0000000000460000-0x0000000000468000-memory.dmp

Filesize
32KB

Download
memory/2152-5-0x0000000000470000-0x0000000000480000-memory.dmp

Filesize
64KB

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memory/2152-3-0x0000000000450000-0x0000000000458000-memory.dmp

Filesize
32KB

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memory/2152-2-0x000000001AFE0000-0x000000001B060000-memory.dmp

Filesize
512KB

Download
memory/2152-1-0x000007FEF5830000-0x000007FEF621C000-memory.dmp

Filesize
9.9MB

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