dcrat | b99d9eed911ab2b38b6a93fca9ddd547133e47466b59032aa9559a71d5ab594e

General

Target

JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Size

1.0MB
MD5

2648fa65235583bd9a8b0a1063ba1d17
SHA1

16cd383f909e1f5deadea293079f521e0b7586f7
SHA256

b99d9eed911ab2b38b6a93fca9ddd547133e47466b59032aa9559a71d5ab594e
SHA512

c578e496b5df018841e52ef44cba2e28a6a79053c10437b69cd9d51da74d299cdddff7c06053184a25547b882444a117f031910eac0bc513dabb386046fbb18d
SSDEEP

24576:lNSq6QYgL2IECn0/OxpgZWijUUKBQoXcDw+4:L6fgL/L04byT

Score

10^/10

dcrat infostealer persistence 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 9 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	3648	1376	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1912	1376	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	932	1376	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2688	1376	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4592	1376	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1460	1376	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4612	1376	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3388	1376	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1700	1376	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/448-1-0x0000000000470000-0x0000000000578000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cbf-11.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe

Executes dropped EXE 1 IoCs

pid	Process
4060	csrss.exe

Adds Run key to start application 2 TTPs 9 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\Recovery\\WindowsRE\\SppExtComObj.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\unsecapp = "\"C:\\Windows\\schemas\\Provisioning\\unsecapp.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Recovery\\WindowsRE\\services.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\CastingShellExt\\RuntimeBroker.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Program Files\\Windows Photo Viewer\\it-IT\\dwm.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\SharedRealitySvc\\spoolsv.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MusNotification = "\"C:\\Recovery\\WindowsRE\\MusNotification.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Documents and Settings\\csrss.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Windows\\winhlp32\\explorer.exe\""	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\System32\CastingShellExt\RuntimeBroker.exe	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
File created	C:\Windows\System32\CastingShellExt\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
File created	C:\Windows\System32\SharedRealitySvc\spoolsv.exe	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
File created	C:\Windows\System32\SharedRealitySvc\f3b6ecef712a24f33798f5d2fb3790c3d9b894c4	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\ModifiableWindowsApps\csrss.exe	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
File created	C:\Program Files\Windows Photo Viewer\it-IT\dwm.exe	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
File created	C:\Program Files\Windows Photo Viewer\it-IT\6cb0b6c459d5d3455a3da700e713f2e2529862ff	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\schemas\Provisioning\29c1c3cc0f76855c7e7456076a4ffc27e4947119	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
File created	C:\Windows\winhlp32\explorer.exe	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
File created	C:\Windows\winhlp32\7a0fd90576e08807bde2cc57bcf9854bbce05fe3	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
File created	C:\Windows\schemas\Provisioning\unsecapp.exe	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 9 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4612	schtasks.exe
3388	schtasks.exe
1700	schtasks.exe
3648	schtasks.exe
1912	schtasks.exe
932	schtasks.exe
2688	schtasks.exe
4592	schtasks.exe
1460	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
4060	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe
Token: SeDebugPrivilege	4060	csrss.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 448 wrote to memory of 4060	448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe	92
PID 448 wrote to memory of 4060	448	JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe	92

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_2648fa65235583bd9a8b0a1063ba1d17.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2648fa65235583bd9a8b0a1063ba1d17.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:448
- C:\Documents and Settings\csrss.exe
  "C:\Documents and Settings\csrss.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4060

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
- Scheduled Task/Job: Scheduled Task
PID:3648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\CastingShellExt\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1912

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "MusNotification" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\MusNotification.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:932

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Documents and Settings\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\winhlp32\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4592

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\SharedRealitySvc\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\it-IT\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3388

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\schemas\Provisioning\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1700

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

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\winhlp32\explorer.exe

Filesize
1.0MB

MD5
2648fa65235583bd9a8b0a1063ba1d17

SHA1
16cd383f909e1f5deadea293079f521e0b7586f7

SHA256
b99d9eed911ab2b38b6a93fca9ddd547133e47466b59032aa9559a71d5ab594e

SHA512
c578e496b5df018841e52ef44cba2e28a6a79053c10437b69cd9d51da74d299cdddff7c06053184a25547b882444a117f031910eac0bc513dabb386046fbb18d

Download Submit
memory/448-0-0x00007FF8CFC13000-0x00007FF8CFC15000-memory.dmp

Filesize
8KB

Download
memory/448-1-0x0000000000470000-0x0000000000578000-memory.dmp

Filesize
1.0MB

Download
memory/448-4-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

Filesize
10.8MB

Download
memory/448-33-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

Filesize
10.8MB

Download
memory/4060-34-0x000000001C210000-0x000000001C21C000-memory.dmp

Filesize
48KB

Download
memory/4060-35-0x000000001C320000-0x000000001C32E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads