dcrat | 69846f46913239164023e3ccb5da768a51dd68e8865ff90695f1ab54ff2f50dd

General

Target

861245da497c3a338b6df43fc75d90a4.exe
Size

2.3MB
MD5

861245da497c3a338b6df43fc75d90a4
SHA1

8acba2114d70f4482cda428b9c336c331af7340d
SHA256

69846f46913239164023e3ccb5da768a51dd68e8865ff90695f1ab54ff2f50dd
SHA512

a438151c7a4daada0905a0ba8aaf9c04e610e5196ede9c1caaaeced49d410cc99afbc65ed6aa804e3e5f414a8e605a7d2a0b73faf029ba7442af058277e5cd09
SSDEEP

49152:vXBdiJZutsBAIJYCRqtFaDVTNOQwwqngiklt7D12OqulqAlOdLH:niJZFOIJHRqyNOQwLdkltfIeqtdLH

Score

10^/10

dcrat infostealer rat

Malware Config

Signatures

DcRat 20 IoCs

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

rat infostealer dcrat

description	ioc	pid	Process
		3388	schtasks.exe
		5000	schtasks.exe
		2952	schtasks.exe
		4968	schtasks.exe
		916	schtasks.exe
		2636	schtasks.exe
		2720	schtasks.exe
File created	C:\Windows\security\logs\cc11b995f2a76d		861245da497c3a338b6df43fc75d90a4.exe
		4864	schtasks.exe
File created	C:\Program Files\Windows Multimedia Platform\6ccacd8608530f		861245da497c3a338b6df43fc75d90a4.exe
		4464	schtasks.exe
		1844	schtasks.exe
		3924	schtasks.exe
		3824	schtasks.exe
		4164	schtasks.exe
		3968	schtasks.exe
		3372	schtasks.exe
		2832	schtasks.exe
		4376	schtasks.exe
		3064	schtasks.exe

Dcrat family
dcrat

Process spawned unexpected child process 18 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	2952	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5000	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3824	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4464	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4164	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3388	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4968	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3968	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3372	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	916	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1844	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3924	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2832	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4376	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2636	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4864	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3064	4384	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2720	4384	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4412-1-0x0000000000D20000-0x0000000000F72000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cb0-30.dat	dcrat

Checks computer location settings 2 TTPs 2 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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	861245da497c3a338b6df43fc75d90a4.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	861245da497c3a338b6df43fc75d90a4.exe

Executes dropped EXE 1 IoCs

pid	Process
1952	taskhostw.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Multimedia Platform\Idle.exe	861245da497c3a338b6df43fc75d90a4.exe
File opened for modification	C:\Program Files\Windows Multimedia Platform\Idle.exe	861245da497c3a338b6df43fc75d90a4.exe
File created	C:\Program Files\Windows Multimedia Platform\6ccacd8608530f	861245da497c3a338b6df43fc75d90a4.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\security\logs\winlogon.exe	861245da497c3a338b6df43fc75d90a4.exe
File created	C:\Windows\security\logs\cc11b995f2a76d	861245da497c3a338b6df43fc75d90a4.exe
File created	C:\Windows\DigitalLocker\en-US\smss.exe	861245da497c3a338b6df43fc75d90a4.exe
File created	C:\Windows\DigitalLocker\en-US\69ddcba757bf72	861245da497c3a338b6df43fc75d90a4.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-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	861245da497c3a338b6df43fc75d90a4.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3968	schtasks.exe
3372	schtasks.exe
916	schtasks.exe
4464	schtasks.exe
1844	schtasks.exe
3924	schtasks.exe
2636	schtasks.exe
4376	schtasks.exe
4864	schtasks.exe
2952	schtasks.exe
5000	schtasks.exe
4164	schtasks.exe
3388	schtasks.exe
4968	schtasks.exe
2832	schtasks.exe
3824	schtasks.exe
3064	schtasks.exe
2720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4412	861245da497c3a338b6df43fc75d90a4.exe
2764	861245da497c3a338b6df43fc75d90a4.exe
1952	taskhostw.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4412	861245da497c3a338b6df43fc75d90a4.exe
Token: SeDebugPrivilege	2764	861245da497c3a338b6df43fc75d90a4.exe
Token: SeDebugPrivilege	1952	taskhostw.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4412 wrote to memory of 876	4412	861245da497c3a338b6df43fc75d90a4.exe	90
PID 4412 wrote to memory of 876	4412	861245da497c3a338b6df43fc75d90a4.exe	90
PID 876 wrote to memory of 1132	876	cmd.exe	92
PID 876 wrote to memory of 1132	876	cmd.exe	92
PID 876 wrote to memory of 2764	876	cmd.exe	95
PID 876 wrote to memory of 2764	876	cmd.exe	95
PID 2764 wrote to memory of 1952	2764	861245da497c3a338b6df43fc75d90a4.exe	108
PID 2764 wrote to memory of 1952	2764	861245da497c3a338b6df43fc75d90a4.exe	108

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\861245da497c3a338b6df43fc75d90a4.exe
"C:\Users\Admin\AppData\Local\Temp\861245da497c3a338b6df43fc75d90a4.exe"
1⤵
- DcRat
- Checks computer location settings
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4412
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\B24wjK8S6m.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:876
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1132
- - C:\Users\Admin\AppData\Local\Temp\861245da497c3a338b6df43fc75d90a4.exe
    "C:\Users\Admin\AppData\Local\Temp\861245da497c3a338b6df43fc75d90a4.exe"
    3⤵
    - Checks computer location settings
    - Drops file in Windows directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2764
  - - C:\Users\Default\Pictures\taskhostw.exe
      "C:\Users\Default\Pictures\taskhostw.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1952

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Multimedia Platform\Idle.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2952

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Windows Multimedia Platform\Idle.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Multimedia Platform\Idle.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Windows\security\logs\winlogon.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4464

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\security\logs\winlogon.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4164

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 6 /tr "'C:\Windows\security\logs\winlogon.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3388

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Desktop\fontdrvhost.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4968

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Users\Admin\Desktop\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3968

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhostf" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\Desktop\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3372

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3924

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Pictures\taskhostw.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2832

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Users\Default\Pictures\taskhostw.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4376

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 5 /tr "'C:\Users\Default\Pictures\taskhostw.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2636

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Windows\DigitalLocker\en-US\smss.exe'" /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\DigitalLocker\en-US\smss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Windows\DigitalLocker\en-US\smss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2720

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\861245da497c3a338b6df43fc75d90a4.exe.log

Filesize
1KB

MD5
bbb951a34b516b66451218a3ec3b0ae1

SHA1
7393835a2476ae655916e0a9687eeaba3ee876e9

SHA256
eb70c64ae99d14ac2588b7a84854fbf3c420532d7fe4dfd49c7b5a70c869943a

SHA512
63bcbfcf8e7421c66855c487c31b2991a989bdea0c1edd4c40066b52fa3eb3d9d37db1cd21b8eb4f33dd5870cc20532c8f485eab9c0b4f6b0793a35c077f2d6f

Download Submit
C:\Users\Admin\AppData\Local\Temp\B24wjK8S6m.bat

Filesize
235B

MD5
5dac228c8d4f8951361e11f3c9314966

SHA1
bfaee8e7e51bbaa27e53f7e45d565db67b16ec59

SHA256
ff08f032128fc4fcb05470c78ef0c2e931f74a57692830b7d278698ee7a0df3a

SHA512
5b1eb5be9f60f064dc1385ac5fb1b90df091255d18a170885f5b30748a4b178425d6c0889658945579d9589b0a8b1def23c1b5a239f0040adec9957ef8b7fb5b

Download Submit
C:\Users\Default\Pictures\taskhostw.exe

Filesize
2.3MB

MD5
861245da497c3a338b6df43fc75d90a4

SHA1
8acba2114d70f4482cda428b9c336c331af7340d

SHA256
69846f46913239164023e3ccb5da768a51dd68e8865ff90695f1ab54ff2f50dd

SHA512
a438151c7a4daada0905a0ba8aaf9c04e610e5196ede9c1caaaeced49d410cc99afbc65ed6aa804e3e5f414a8e605a7d2a0b73faf029ba7442af058277e5cd09

Download Submit
memory/2764-25-0x0000000002CE0000-0x0000000002CF2000-memory.dmp

Filesize
72KB

Download
memory/2764-24-0x000000001B740000-0x000000001B796000-memory.dmp

Filesize
344KB

Download
memory/4412-4-0x000000001C110000-0x000000001C160000-memory.dmp

Filesize
320KB

Download
memory/4412-6-0x000000001C160000-0x000000001C1B6000-memory.dmp

Filesize
344KB

Download
memory/4412-7-0x0000000001770000-0x0000000001782000-memory.dmp

Filesize
72KB

Download
memory/4412-8-0x000000001C9B0000-0x000000001CED8000-memory.dmp

Filesize
5.2MB

Download
memory/4412-11-0x000000001C1C0000-0x000000001C1C8000-memory.dmp

Filesize
32KB

Download
memory/4412-10-0x000000001C1B0000-0x000000001C1B8000-memory.dmp

Filesize
32KB

Download
memory/4412-9-0x000000001C100000-0x000000001C10E000-memory.dmp

Filesize
56KB

Download
memory/4412-5-0x000000001C0C0000-0x000000001C0D6000-memory.dmp

Filesize
88KB

Download
memory/4412-21-0x00007FFB8A060000-0x00007FFB8AB21000-memory.dmp

Filesize
10.8MB

Download
memory/4412-0-0x00007FFB8A063000-0x00007FFB8A065000-memory.dmp

Filesize
8KB

Download
memory/4412-3-0x000000001C0A0000-0x000000001C0BC000-memory.dmp

Filesize
112KB

Download
memory/4412-2-0x00007FFB8A060000-0x00007FFB8AB21000-memory.dmp

Filesize
10.8MB

Download
memory/4412-1-0x0000000000D20000-0x0000000000F72000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads