dcrat | b46875a8a1001af973be5f2b9f8ea9eccc3c87fa8cc85d8a2b4e7b93bdb79dd4

General

Target

incognito.exe
Size

1.4MB
MD5

b0e8a9d9dfa09406a6d2a60f52938c70
SHA1

75b046eb99a92ccaa61adb3e3a5367ce32553750
SHA256

b46875a8a1001af973be5f2b9f8ea9eccc3c87fa8cc85d8a2b4e7b93bdb79dd4
SHA512

0887b62285f5939ce639f1168573e457408252d99124c372573bbd41a861039c13fdf5ae4942d463b4c91341f68c2461667a43cf0ba119d4a5db7c6f42cf41ed
SSDEEP

24576:U2G/nvxW3Ww0tZpGpmEq8NW+MjYTJm4FR9StJ4g7N/M2D3C1X1X:UbA30ZpGpmEkINHMJ4Ielt

Score

10^/10

dcrat evasion infostealer 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 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	2824	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2568	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2676	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2452	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2552	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1240	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1516	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2796	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2820	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2944	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3004	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2780	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2472	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1500	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2628	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2772	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1592	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2652	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2760	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1600	2740	schtasks.exe	32
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1196	2740	schtasks.exe	32

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\ConsentPromptBehaviorAdmin = "0"	HyperBrokercommon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	HyperBrokercommon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	wininit.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	wininit.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	wininit.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	HyperBrokercommon.exe

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0007000000014708-9.dat	dcrat
behavioral1/memory/2572-13-0x00000000002C0000-0x00000000003E4000-memory.dmp	dcrat
behavioral1/memory/1392-38-0x0000000000AC0000-0x0000000000BE4000-memory.dmp	dcrat

Executes dropped EXE 2 IoCs

pid	Process
2572	HyperBrokercommon.exe
1392	wininit.exe

Loads dropped DLL 2 IoCs

pid	Process
2168	cmd.exe
2168	cmd.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	wininit.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	wininit.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	HyperBrokercommon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	HyperBrokercommon.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Defender\en-US\HyperBrokercommon.exe	HyperBrokercommon.exe
File created	C:\Program Files\Windows Defender\en-US\110f63d1be8130	HyperBrokercommon.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Offline Web Pages\wininit.exe	HyperBrokercommon.exe
File created	C:\Windows\Offline Web Pages\56085415360792	HyperBrokercommon.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
2568	schtasks.exe
2452	schtasks.exe
2760	schtasks.exe
2676	schtasks.exe
2552	schtasks.exe
3004	schtasks.exe
2780	schtasks.exe
2472	schtasks.exe
2652	schtasks.exe
1600	schtasks.exe
2824	schtasks.exe
1240	schtasks.exe
1516	schtasks.exe
2796	schtasks.exe
2820	schtasks.exe
2944	schtasks.exe
2628	schtasks.exe
2772	schtasks.exe
1592	schtasks.exe
1196	schtasks.exe
1500	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2572	HyperBrokercommon.exe
2572	HyperBrokercommon.exe
2572	HyperBrokercommon.exe
2572	HyperBrokercommon.exe
2572	HyperBrokercommon.exe
1392	wininit.exe
1392	wininit.exe
1392	wininit.exe
1392	wininit.exe
1392	wininit.exe
1392	wininit.exe
1392	wininit.exe
1392	wininit.exe
1392	wininit.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1392	wininit.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2572	HyperBrokercommon.exe
Token: SeDebugPrivilege	1392	wininit.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2344 wrote to memory of 1284	2344	incognito.exe	28
PID 2344 wrote to memory of 1284	2344	incognito.exe	28
PID 2344 wrote to memory of 1284	2344	incognito.exe	28
PID 2344 wrote to memory of 1284	2344	incognito.exe	28
PID 1284 wrote to memory of 2168	1284	WScript.exe	29
PID 1284 wrote to memory of 2168	1284	WScript.exe	29
PID 1284 wrote to memory of 2168	1284	WScript.exe	29
PID 1284 wrote to memory of 2168	1284	WScript.exe	29
PID 2168 wrote to memory of 2572	2168	cmd.exe	31
PID 2168 wrote to memory of 2572	2168	cmd.exe	31
PID 2168 wrote to memory of 2572	2168	cmd.exe	31
PID 2168 wrote to memory of 2572	2168	cmd.exe	31
PID 2572 wrote to memory of 1392	2572	HyperBrokercommon.exe	54
PID 2572 wrote to memory of 1392	2572	HyperBrokercommon.exe	54
PID 2572 wrote to memory of 1392	2572	HyperBrokercommon.exe	54

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"	HyperBrokercommon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	HyperBrokercommon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	HyperBrokercommon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	wininit.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	wininit.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	wininit.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\incognito.exe
"C:\Users\Admin\AppData\Local\Temp\incognito.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2344
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\browserreviewSavesruntimecommon\sALjCX2DJ1FjfO.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1284
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\browserreviewSavesruntimecommon\jt4LBgBNIUJsIGJZrjCIK93Fg0t.bat" "
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2168
  - - C:\browserreviewSavesruntimecommon\HyperBrokercommon.exe
      "C:\browserreviewSavesruntimecommon\HyperBrokercommon.exe"
      4⤵
      UAC bypass
      Executes dropped EXE
      Checks whether UAC is enabled
      Drops file in Program Files directory
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      System policy modification
      PID:2572
    - - C:\Windows\Offline Web Pages\wininit.exe
        
        "C:\Windows\Offline Web Pages\wininit.exe"
        5⤵
        UAC bypass
        Executes dropped EXE
        Checks whether UAC is enabled
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        System policy modification
        
        PID:1392

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2824

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2568

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Recovery\5b7985c2-d100-11ee-bb00-c695cbc44580\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\Windows\Offline Web Pages\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2452

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\Offline Web Pages\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2552

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Windows\Offline Web Pages\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1240

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "HyperBrokercommonH" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Defender\en-US\HyperBrokercommon.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1516

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "HyperBrokercommon" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\en-US\HyperBrokercommon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2796

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "HyperBrokercommonH" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Defender\en-US\HyperBrokercommon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2820

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2944

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3004

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2780

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 12 /tr "'C:\browserreviewSavesruntimecommon\taskhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2472

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\browserreviewSavesruntimecommon\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1500

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 14 /tr "'C:\browserreviewSavesruntimecommon\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2628

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\Users\Default\NetHood\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2772

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default\NetHood\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1592

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\Users\Default\NetHood\services.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 "cmdc" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\cmd.exe'" /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2760

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\MSOCache\All Users\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1600

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1196

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

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

Scheduled Task/Job

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\browserreviewSavesruntimecommon\jt4LBgBNIUJsIGJZrjCIK93Fg0t.bat

Filesize
58B

MD5
4c037bd86379e42fb1367ad486900857

SHA1
1c12566e86fc161508cdc1fe77e1fa57682d8782

SHA256
4e815d481c421f6285580f0d77190113a5f21292ac2c69e3a0d62a0797e4fb65

SHA512
04188af986d5bb7ecbc53f1ef83d7673c8f31b3b187d2e3f0281aa3affec3cda56dfe50b19959dd8ef57aad3af6ddf00f9cf1fd5c48d057f0808769f841ceaf1

Download Submit
C:\browserreviewSavesruntimecommon\sALjCX2DJ1FjfO.vbe

Filesize
235B

MD5
5b4c9d21a4263bd3310afbeb618f42e8

SHA1
eae0a7615464b86cb86ba6110dd96d78583d5f3c

SHA256
87ced7720839bd67e4843c2bb8eaac2de03c608f1a2ee66068f551a3c74ef40f

SHA512
c2d275195169c7ed9746d2ad0741da073b84903c1c0831adf954f1221faa465a5d31a3885b33303858f66fa82fdb69e4efb058f8e7c36b06eefef900900fefb0

Download Submit
\browserreviewSavesruntimecommon\HyperBrokercommon.exe

Filesize
1.1MB

MD5
02006b9d56f2799d5fd9ad8a3e9c698d

SHA1
89ba4cba2ede6543a8c3a943e51d05af666ba3b4

SHA256
1e502065aa16df514c741ddc34e5857d16baaf7d352c088dbfb239a955430517

SHA512
47efbd1b4b4bc5f6cf2ac17650d1a5bb4af256989ce05ea3e38bdb5eb3f7009784cf34a1a539fbc1ec9c39cf5f0cd10cba746dc117a3c71cab102f2e20dfc2c9

Download Submit
memory/1392-38-0x0000000000AC0000-0x0000000000BE4000-memory.dmp

Filesize
1.1MB

Download
memory/2572-13-0x00000000002C0000-0x00000000003E4000-memory.dmp

Filesize
1.1MB

Download
memory/2572-14-0x0000000000800000-0x000000000081C000-memory.dmp

Filesize
112KB

Download
memory/2572-15-0x0000000000820000-0x000000000082A000-memory.dmp

Filesize
40KB

Download
memory/2572-16-0x0000000000830000-0x000000000083C000-memory.dmp

Filesize
48KB

Download
memory/2572-17-0x0000000000840000-0x000000000084C000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads