dcrat | 2321740f8faa2f44307ba42c8c5cb676506e8c8f76f9bc2aacd585f9809767b8

General

Target

JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
Size

547KB
MD5

385e5e5ca1cf37ef0fd0f8738066f457
SHA1

be83e4802fc9332595ea7bd754198b4232c47509
SHA256

2321740f8faa2f44307ba42c8c5cb676506e8c8f76f9bc2aacd585f9809767b8
SHA512

f395f79d5368bf23311cf56af5e69dbb51d805eb0d134742e1fd1e91d5246ce7fb90529f1bbcfe4b77c94a6e64da5ebc69905e35f98f8c5d8ac532ee174b62a9
SSDEEP

12288:xqnO30tV2lZu09sR2ia1OgdDG3cSIksYEkQlrB:x+O3rvZDiUx5

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 4 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	2792	2688	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2712	2688	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2836	2688	schtasks.exe	31
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2732	2688	schtasks.exe	31

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2380-1-0x00000000010C0000-0x0000000001150000-memory.dmp	dcrat
behavioral1/files/0x0007000000012117-17.dat	dcrat
behavioral1/memory/2656-19-0x0000000000870000-0x0000000000900000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2656	sppsvc.exe

Adds Run key to start application 2 TTPs 4 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\sppsvc = "\"C:\\Program Files (x86)\\Windows Mail\\fr-FR\\sppsvc.exe\""	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Windows\\System32\\WfHC\\wininit.exe\""	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Windows\\System32\\wbem\\IMAPIv2-FileSystemSupport\\WmiPrvSE.exe\""	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WMIADAP = "\"C:\\Windows\\System32\\wbem\\dsprov\\WMIADAP.exe\""	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\System32\wbem\IMAPIv2-FileSystemSupport\WmiPrvSE.exe	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
File created	C:\Windows\System32\wbem\IMAPIv2-FileSystemSupport\24dbde2999530ef5fd907494bc374d663924116c	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
File created	C:\Windows\System32\wbem\dsprov\WMIADAP.exe	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
File created	C:\Windows\System32\wbem\dsprov\75a57c1bdf437c0c81ad56e81f43c7323ed35745	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
File created	C:\Windows\System32\WfHC\wininit.exe	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
File created	C:\Windows\System32\WfHC\560854153607923c4c5f107085a7db67be01f252	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Mail\fr-FR\sppsvc.exe	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\fr-FR\sppsvc.exe	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
File created	C:\Program Files (x86)\Windows Mail\fr-FR\0a1fd5f707cd16ea89afd3d6db52b2da58214a6c	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.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 4 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2792	schtasks.exe
2712	schtasks.exe
2836	schtasks.exe
2732	schtasks.exe

Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

pid	Process
2656	sppsvc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2380	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
2380	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
2380	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
2656	sppsvc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe
Token: SeDebugPrivilege	2656	sppsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2788	2380	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe	36
PID 2380 wrote to memory of 2788	2380	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe	36
PID 2380 wrote to memory of 2788	2380	JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe	36
PID 2788 wrote to memory of 2632	2788	cmd.exe	38
PID 2788 wrote to memory of 2632	2788	cmd.exe	38
PID 2788 wrote to memory of 2632	2788	cmd.exe	38
PID 2788 wrote to memory of 2656	2788	cmd.exe	39
PID 2788 wrote to memory of 2656	2788	cmd.exe	39
PID 2788 wrote to memory of 2656	2788	cmd.exe	39
PID 2788 wrote to memory of 2656	2788	cmd.exe	39
PID 2788 wrote to memory of 2656	2788	cmd.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_385e5e5ca1cf37ef0fd0f8738066f457.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_385e5e5ca1cf37ef0fd0f8738066f457.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\6SaSiIAD69.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2632
- - C:\Program Files (x86)\Windows Mail\fr-FR\sppsvc.exe
    "C:\Program Files (x86)\Windows Mail\fr-FR\sppsvc.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: CmdExeWriteProcessMemorySpam
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2656

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\fr-FR\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\WfHC\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2712

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\IMAPIv2-FileSystemSupport\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2836

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Windows\System32\wbem\dsprov\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2732

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Windows Mail\fr-FR\sppsvc.exe

Filesize
547KB

MD5
385e5e5ca1cf37ef0fd0f8738066f457

SHA1
be83e4802fc9332595ea7bd754198b4232c47509

SHA256
2321740f8faa2f44307ba42c8c5cb676506e8c8f76f9bc2aacd585f9809767b8

SHA512
f395f79d5368bf23311cf56af5e69dbb51d805eb0d134742e1fd1e91d5246ce7fb90529f1bbcfe4b77c94a6e64da5ebc69905e35f98f8c5d8ac532ee174b62a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\6SaSiIAD69.bat

Filesize
216B

MD5
1b51a8d57fe6d949489b582ee0ef880b

SHA1
80ab391f05508b92aa6ab31af034f686301eef90

SHA256
d225b0c9607bbc6402f2a9053b6ff1a95c274d63a6cbb359528bce24481f3a27

SHA512
6ba2d6079610f2f884184095f4c4fdc109b7466a37111383c4d511c611c1b85e52e7f17072093998e893d38d97bb0cec44460302c1ec8011e37e5a4bd466e409

Download Submit
memory/2380-0-0x000007FEF5C83000-0x000007FEF5C84000-memory.dmp

Filesize
4KB

Download
memory/2380-1-0x00000000010C0000-0x0000000001150000-memory.dmp

Filesize
576KB

Download
memory/2380-2-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download
memory/2380-16-0x000007FEF5C80000-0x000007FEF666C000-memory.dmp

Filesize
9.9MB

Download
memory/2656-19-0x0000000000870000-0x0000000000900000-memory.dmp

Filesize
576KB

Download
memory/2656-20-0x0000000000250000-0x000000000025C000-memory.dmp

Filesize
48KB

Download
memory/2656-21-0x0000000000260000-0x000000000026C000-memory.dmp

Filesize
48KB

Download
memory/2656-22-0x0000000000280000-0x000000000028E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads