dcrat | 77c5f17e97ac13be2f3b9f632d2a1cea5a17b598b533840d2996985d218445fe

General

Target

AnyDesk.exe.exe
Size

1.1MB
MD5

3f3906f8ced4518fe1f773cc8539c00a
SHA1

5910cb6fac241a38403053e54091c1260ac99b76
SHA256

77c5f17e97ac13be2f3b9f632d2a1cea5a17b598b533840d2996985d218445fe
SHA512

4e5e3750cf93f3f46b2916b8aa9ddd9cc5c1098d003875f48a5fa20cc963a6ffb4a297c008679b38cc8d2512009bf34c9f802fc0ace22dc0d32dd2abd5bdc2ec
SSDEEP

12288:aRZ+IoG/n9IQxW3OBsee2X+t4RbG8xAWZvo/WmZmzoCALJRWNutN4C99ZxzNxiTd:U2G/nvxW3Ww0tzZvo/EzouCRxq55R

Score

10^/10

dcrat 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

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	3156	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3188	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3300	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4420	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	556	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3272	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4484	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1504	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1244	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2880	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	716	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2496	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4176	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3228	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4380	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5004	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1320	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	372	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1236	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1072	2140	schtasks.exe	93
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	612	2140	schtasks.exe	93

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x0007000000023411-10.dat	dcrat
behavioral2/memory/2016-12-0x0000000000610000-0x00000000006E6000-memory.dmp	dcrat

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	AnyDesk.exe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	Perfdhcp.exe

Executes dropped EXE 2 IoCs

pid	Process
2016	Perfdhcp.exe
4460	WaaSMedicAgent.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows NT\Accessories\en-US\c82b8037eab33d	Perfdhcp.exe
File created	C:\Program Files (x86)\Microsoft\RuntimeBroker.exe	Perfdhcp.exe
File opened for modification	C:\Program Files (x86)\Microsoft\RuntimeBroker.exe	Perfdhcp.exe
File created	C:\Program Files (x86)\Microsoft\9e8d7a4ca61bd9	Perfdhcp.exe
File created	C:\Program Files (x86)\Microsoft.NET\RedistList\SppExtComObj.exe	Perfdhcp.exe
File created	C:\Program Files (x86)\Microsoft.NET\RedistList\e1ef82546f0b02	Perfdhcp.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\en-US\WaaSMedicAgent.exe	Perfdhcp.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 21 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2880	schtasks.exe
5004	schtasks.exe
612	schtasks.exe
3156	schtasks.exe
3300	schtasks.exe
556	schtasks.exe
4484	schtasks.exe
1244	schtasks.exe
2496	schtasks.exe
3228	schtasks.exe
372	schtasks.exe
1320	schtasks.exe
1072	schtasks.exe
3188	schtasks.exe
3272	schtasks.exe
1504	schtasks.exe
716	schtasks.exe
4176	schtasks.exe
4420	schtasks.exe
4380	schtasks.exe
1236	schtasks.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings	AnyDesk.exe.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings	Perfdhcp.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2016	Perfdhcp.exe
4460	WaaSMedicAgent.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2016	Perfdhcp.exe
Token: SeDebugPrivilege	4460	WaaSMedicAgent.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2948 wrote to memory of 2056	2948	AnyDesk.exe.exe	82
PID 2948 wrote to memory of 2056	2948	AnyDesk.exe.exe	82
PID 2948 wrote to memory of 2056	2948	AnyDesk.exe.exe	82
PID 2056 wrote to memory of 1012	2056	WScript.exe	95
PID 2056 wrote to memory of 1012	2056	WScript.exe	95
PID 2056 wrote to memory of 1012	2056	WScript.exe	95
PID 1012 wrote to memory of 2016	1012	cmd.exe	97
PID 1012 wrote to memory of 2016	1012	cmd.exe	97
PID 2016 wrote to memory of 4896	2016	Perfdhcp.exe	121
PID 2016 wrote to memory of 4896	2016	Perfdhcp.exe	121
PID 4896 wrote to memory of 3968	4896	cmd.exe	123
PID 4896 wrote to memory of 3968	4896	cmd.exe	123
PID 4896 wrote to memory of 4460	4896	cmd.exe	124
PID 4896 wrote to memory of 4460	4896	cmd.exe	124

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\AnyDesk.exe.exe
"C:\Users\Admin\AppData\Local\Temp\AnyDesk.exe.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\ServerSaves\xEkSKuT.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:2056
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\ServerSaves\9utlu4N9jMYY.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1012
  - - C:\ServerSaves\Perfdhcp.exe
      "C:\ServerSaves\Perfdhcp.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Drops file in Program Files directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2016
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\aTs8TvT32m.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4896
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:3968
      - C:\Program Files (x86)\Windows NT\Accessories\en-US\WaaSMedicAgent.exe
        
        "C:\Program Files (x86)\Windows NT\Accessories\en-US\WaaSMedicAgent.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3156

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3188

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Microsoft\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3300

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\SppExtComObj.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4420

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Microsoft.NET\RedistList\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3272

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WaaSMedicAgentW" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\WaaSMedicAgent.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WaaSMedicAgent" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\WaaSMedicAgent.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1504

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WaaSMedicAgentW" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows NT\Accessories\en-US\WaaSMedicAgent.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1244

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2880

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:716

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2496

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4176

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3228

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4380

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:5004

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1320

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:372

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Users\Default User\fontdrvhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1236

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Users\Default User\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1072

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ServerSaves\9utlu4N9jMYY.bat

Filesize
29B

MD5
e7df233b682d7f6e42b14eb701f9a9e7

SHA1
37b15dd8d912859ad04fb2b211b61aedb8467a96

SHA256
c1d207f5f0ae71cf9842d7ed133a6ecde862459423a20d525a75e1745050b51f

SHA512
0b3151e241a8718e649c50a6c5f13c403689ea048a98d4f369e9db49f5a96576fdf3a1d80a9cbc4cafef217416bea71d3130adb707f204f32eef229da9362d7b

Download Submit
C:\ServerSaves\Perfdhcp.exe

Filesize
827KB

MD5
af544acc9123c753c94da56296c6a1fc

SHA1
416f6f28bd3c92a9a9d78973104c203667896f3e

SHA256
7503e7b46f9c46b16c8598f647b1a9bb75e8d7b8e534fc7042c72693b1cbdc7f

SHA512
90db52192ad0b6e736f544754e07fea5f4836e70785949547929772a75a5d00ba686c0dc0db263948a9f79b5611c9d9202090ff44df78bd023931546d8a3e288

Download Submit
C:\ServerSaves\xEkSKuT.vbe

Filesize
200B

MD5
3f3e10474645632811ac1e556e32c820

SHA1
afd8bcc7639a38454334c8b4a7cde9969205211e

SHA256
15fd3d8f2a1e798de4d2ee0aa77c91ff7bf63444e94cfbda07fca0b0636e3d4a

SHA512
e435ddd64862b10746c1a07d9658f6173f23cf92c573732731617112653395c647138cf75631739bc4050a421908863caceb8b547054ef9dfb4cb98b5ad4a7b6

Download Submit
C:\Users\Admin\AppData\Local\Temp\aTs8TvT32m.bat

Filesize
235B

MD5
fb3560c8eed824ead0adf5453ab5270f

SHA1
c550e1069d706c46d6f84bed8f4a44b0bd868e25

SHA256
9b0de1cc6ad2004c6fbccc5992564c29df50710255dc08699f6bbcf1ff88334e

SHA512
f82062b5281e279b0a7b3164f5b6029483bdde1c45767fb962f56a7c9b0321cf6a3017855187918097ee0e25e1f89de80017342590e3797eec37e2e767dc7f8c

Download Submit
memory/2016-13-0x00007FFE55CD3000-0x00007FFE55CD5000-memory.dmp

Filesize
8KB

Download
memory/2016-12-0x0000000000610000-0x00000000006E6000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads