dcrat | fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b

General

Target

fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
Size

1.2MB
MD5

383cad8eb4744a1be8c2b17c74b97b0a
SHA1

23ccdd08ba293d56ac66b682b57585a85e1742a1
SHA256

fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b
SHA512

713896072fd43a6566c895ff96f47fb13442864004e1977a79632818537fdf42401fe0659b2ffe21cdf30a097c5d1576b8856046629822cede88f5f77c0a275d
SSDEEP

24576:MATnwO965z/roRbcJEV2oLI2gDMwifE+O3jV5kF9BrK:XuaKEEgTBr

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
Dcrat family
dcrat

Process spawned unexpected child process 12 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	1480	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4484	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2068	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1700	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4068	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1280	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3648	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1220	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3948	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3296	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1800	4852	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2156	4852	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/2228-1-0x00000000008A0000-0x00000000009DE000-memory.dmp	dcrat
behavioral2/files/0x000a000000023b78-24.dat	dcrat

Checks computer location settings 2 TTPs 1 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe

Executes dropped EXE 1 IoCs

pid	Process
2104	dllhost.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\es-ES\fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
File opened for modification	C:\Windows\es-ES\fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
File created	C:\Windows\es-ES\5aeef0fbe1d9cb	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
File created	C:\Windows\Downloaded Program Files\Registry.exe	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
File created	C:\Windows\Downloaded Program Files\ee2ad38f3d4382	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2068	schtasks.exe
4068	schtasks.exe
3948	schtasks.exe
3296	schtasks.exe
1800	schtasks.exe
2156	schtasks.exe
1480	schtasks.exe
4484	schtasks.exe
1700	schtasks.exe
1280	schtasks.exe
3648	schtasks.exe
1220	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2228	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
2228	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
2228	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
2104	dllhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2228	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
Token: SeDebugPrivilege	2104	dllhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 4992	2228	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe	95
PID 2228 wrote to memory of 4992	2228	fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe	95
PID 4992 wrote to memory of 3544	4992	cmd.exe	97
PID 4992 wrote to memory of 3544	4992	cmd.exe	97
PID 4992 wrote to memory of 2104	4992	cmd.exe	98
PID 4992 wrote to memory of 2104	4992	cmd.exe	98

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\fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe
"C:\Users\Admin\AppData\Local\Temp\fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\7wq2rIMbk4.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4992
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:3544
- - C:\Users\Admin\dllhost.exe
    "C:\Users\Admin\dllhost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254bf" /sc MINUTE /mo 7 /tr "'C:\Windows\es-ES\fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1480

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b" /sc ONLOGON /tr "'C:\Windows\es-ES\fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254bf" /sc MINUTE /mo 8 /tr "'C:\Windows\es-ES\fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2068

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 9 /tr "'C:\Windows\Downloaded Program Files\Registry.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Windows\Downloaded Program Files\Registry.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4068

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 5 /tr "'C:\Windows\Downloaded Program Files\Registry.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1280

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1220

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3296

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Admin\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1800

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2156

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\7wq2rIMbk4.bat

Filesize
191B

MD5
680e67975d0bbbffef32b4d7fb5c4b82

SHA1
d3e79b226e0944c94ca4d0cec02d635134cae970

SHA256
1748449c87a73f613eb37a3c23dcd833ba6f0fdb374efafd8229954ee45fdfc9

SHA512
c980eac0d1fed06429db1ebf5cc495174ca20432a2b727b3f879b86bf16ecf1d4994010ddf925c9041a6610cb405167ad904c09927f05ad167f7c83f9d05101a

Download Submit
C:\Users\Admin\dllhost.exe

Filesize
1.2MB

MD5
383cad8eb4744a1be8c2b17c74b97b0a

SHA1
23ccdd08ba293d56ac66b682b57585a85e1742a1

SHA256
fcf5d6647e4d2e13f8083d42fd2f354735453e847d5e5c2f4ae78c78a6b4254b

SHA512
713896072fd43a6566c895ff96f47fb13442864004e1977a79632818537fdf42401fe0659b2ffe21cdf30a097c5d1576b8856046629822cede88f5f77c0a275d

Download Submit
memory/2104-26-0x00000000017D0000-0x00000000017E2000-memory.dmp

Filesize
72KB

Download
memory/2228-0-0x00007FFC7EB33000-0x00007FFC7EB35000-memory.dmp

Filesize
8KB

Download
memory/2228-1-0x00000000008A0000-0x00000000009DE000-memory.dmp

Filesize
1.2MB

Download
memory/2228-2-0x00007FFC7EB30000-0x00007FFC7F5F1000-memory.dmp

Filesize
10.8MB

Download
memory/2228-3-0x0000000002B80000-0x0000000002B9C000-memory.dmp

Filesize
112KB

Download
memory/2228-4-0x000000001BCB0000-0x000000001BD00000-memory.dmp

Filesize
320KB

Download
memory/2228-5-0x000000001B5D0000-0x000000001B5E6000-memory.dmp

Filesize
88KB

Download
memory/2228-6-0x0000000002A50000-0x0000000002A62000-memory.dmp

Filesize
72KB

Download
memory/2228-7-0x000000001C230000-0x000000001C758000-memory.dmp

Filesize
5.2MB

Download
memory/2228-22-0x00007FFC7EB30000-0x00007FFC7F5F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads