dcrat | 2d68deccad13b2eb3c8a456de4cc4a9462e3ac17ec44c4d35f17c900534558bf

General

Target

JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Size

3.2MB
MD5

b5d80e9522f92ea7a5ed8efcefac40d1
SHA1

43e0b1e8a5f0a2690e427e77eb456b295fbe553b
SHA256

2d68deccad13b2eb3c8a456de4cc4a9462e3ac17ec44c4d35f17c900534558bf
SHA512

e2d9c86cb1630ef5e3dc5c4c9364aa7c715613e2f1815617f68c7c108bec16bd4e689220914353da75508bc711d5f7e596306c684fc287c80782d72b76f67c4f
SSDEEP

98304:/lWtalZbW5TGRfg9HAXxQITXxyii9h6ZOrBVTU:/leaJO+Cqxyii9BBVo

Score

10^/10

dcrat discovery evasion infostealer persistence rat themida trojan

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 7 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	2796	2944	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3008	2944	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2680	2944	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2684	2944	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3028	2944	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2676	2944	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2272	2944	schtasks.exe	31

DCRat payload 6 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/1868-23-0x0000000000DA0000-0x0000000001638000-memory.dmp	dcrat
behavioral1/memory/1868-24-0x0000000000DA0000-0x0000000001638000-memory.dmp	dcrat
behavioral1/memory/1868-51-0x0000000000DA0000-0x0000000001638000-memory.dmp	dcrat
behavioral1/memory/1196-55-0x0000000000990000-0x0000000001228000-memory.dmp	dcrat
behavioral1/memory/1196-56-0x0000000000990000-0x0000000001228000-memory.dmp	dcrat
behavioral1/memory/1196-67-0x0000000000990000-0x0000000001228000-memory.dmp	dcrat

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	lsm.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	lsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	lsm.exe

Executes dropped EXE 1 IoCs

pid	Process
1196	lsm.exe

Loads dropped DLL 2 IoCs

pid	Process
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe

Themida packer 7 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1868-23-0x0000000000DA0000-0x0000000001638000-memory.dmp	themida
behavioral1/memory/1868-24-0x0000000000DA0000-0x0000000001638000-memory.dmp	themida
behavioral1/files/0x000500000001a4af-33.dat	themida
behavioral1/memory/1868-51-0x0000000000DA0000-0x0000000001638000-memory.dmp	themida
behavioral1/memory/1196-55-0x0000000000990000-0x0000000001228000-memory.dmp	themida
behavioral1/memory/1196-56-0x0000000000990000-0x0000000001228000-memory.dmp	themida
behavioral1/memory/1196-67-0x0000000000990000-0x0000000001228000-memory.dmp	themida

Adds Run key to start application 2 TTPs 7 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\mfc120fra\\lsm.exe\""	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Program Files\\Windows Defender\\fr-FR\\lsass.exe\""	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\wlanmsm\\lsm.exe\""	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\wecutil\\dllhost.exe\""	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\OSPPSVC = "\"C:\\Program Files\\Common Files\\Microsoft Shared\\OfficeSoftwareProtectionPlatform\\OSPPCEXT\\OSPPSVC.exe\""	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\WMIADAP = "\"C:\\MSOCache\\All Users\\{90140000-001B-0409-0000-0000000FF1CE}-C\\WMIADAP.exe\""	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\Program Files (x86)\\Mozilla Maintenance Service\\System.exe\""	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	lsm.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\mfc120fra\lsm.exe	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File created	C:\Windows\SysWOW64\mfc120fra\101b941d020240259ca4912829b53995ad543df6	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File opened for modification	C:\Windows\SysWOW64\wlanmsm\lsm.exe	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File created	C:\Windows\SysWOW64\wlanmsm\101b941d020240259ca4912829b53995ad543df6	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File opened for modification	C:\Windows\SysWOW64\wecutil\dllhost.exe	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File created	C:\Windows\SysWOW64\wecutil\5940a34987c99120d96dace90a3f93f329dcad63	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1196	lsm.exe

Drops file in Program Files directory 6 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Defender\fr-FR\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPCEXT\OSPPSVC.exe	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File created	C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPCEXT\1610b97d3ab4a74cd8ae104b51bea7bfcc5b9c6f	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File opened for modification	C:\Program Files (x86)\Mozilla Maintenance Service\System.exe	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File created	C:\Program Files (x86)\Mozilla Maintenance Service\27d1bcfc3c54e0e44ea423ffd4ee81fe73670a2a	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
File opened for modification	C:\Program Files\Windows Defender\fr-FR\lsass.exe	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	lsm.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2796	schtasks.exe
3008	schtasks.exe
2680	schtasks.exe
2684	schtasks.exe
3028	schtasks.exe
2676	schtasks.exe
2272	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
1196	lsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
Token: SeDebugPrivilege	1196	lsm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 1196	1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe	39
PID 1868 wrote to memory of 1196	1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe	39
PID 1868 wrote to memory of 1196	1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe	39
PID 1868 wrote to memory of 1196	1868	JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe	39

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\JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b5d80e9522f92ea7a5ed8efcefac40d1.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Windows\SysWOW64\mfc120fra\lsm.exe
  "C:\Windows\System32\mfc120fra\lsm.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1196

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2796

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3008

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\mfc120fra\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2680

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\fr-FR\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\wlanmsm\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3028

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\wecutil\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPCEXT\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2272

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\wlanmsm\lsm.exe

Filesize
3.2MB

MD5
b5d80e9522f92ea7a5ed8efcefac40d1

SHA1
43e0b1e8a5f0a2690e427e77eb456b295fbe553b

SHA256
2d68deccad13b2eb3c8a456de4cc4a9462e3ac17ec44c4d35f17c900534558bf

SHA512
e2d9c86cb1630ef5e3dc5c4c9364aa7c715613e2f1815617f68c7c108bec16bd4e689220914353da75508bc711d5f7e596306c684fc287c80782d72b76f67c4f

Download Submit
memory/1196-67-0x0000000000990000-0x0000000001228000-memory.dmp

Filesize
8.6MB

Download
memory/1196-62-0x0000000000990000-0x0000000001228000-memory.dmp

Filesize
8.6MB

Download
memory/1196-58-0x00000000002B0000-0x00000000002BC000-memory.dmp

Filesize
48KB

Download
memory/1196-59-0x00000000002C0000-0x00000000002C8000-memory.dmp

Filesize
32KB

Download
memory/1196-60-0x0000000000290000-0x000000000029C000-memory.dmp

Filesize
48KB

Download
memory/1196-57-0x0000000000220000-0x000000000022E000-memory.dmp

Filesize
56KB

Download
memory/1196-56-0x0000000000990000-0x0000000001228000-memory.dmp

Filesize
8.6MB

Download
memory/1196-55-0x0000000000990000-0x0000000001228000-memory.dmp

Filesize
8.6MB

Download
memory/1196-47-0x0000000000990000-0x0000000001228000-memory.dmp

Filesize
8.6MB

Download
memory/1868-3-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-49-0x00000000069A0000-0x0000000007238000-memory.dmp

Filesize
8.6MB

Download
memory/1868-10-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-9-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-7-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-6-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-5-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-4-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-0-0x0000000000DA0000-0x0000000001638000-memory.dmp

Filesize
8.6MB

Download
memory/1868-2-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-23-0x0000000000DA0000-0x0000000001638000-memory.dmp

Filesize
8.6MB

Download
memory/1868-24-0x0000000000DA0000-0x0000000001638000-memory.dmp

Filesize
8.6MB

Download
memory/1868-12-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-11-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-48-0x00000000069A0000-0x0000000007238000-memory.dmp

Filesize
8.6MB

Download
memory/1868-13-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-52-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-51-0x0000000000DA0000-0x0000000001638000-memory.dmp

Filesize
8.6MB

Download
memory/1868-14-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-15-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-20-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-21-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-22-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-8-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-19-0x0000000076320000-0x0000000076430000-memory.dmp

Filesize
1.1MB

Download
memory/1868-1-0x0000000076331000-0x0000000076332000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads