dcrat | 82039f0956002ab4215ac1eec5ae1951408ff0fea64f87f924fd46faf844f15e

General

Target

JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Size

2.0MB
MD5

1d55b32e2aee97d34060fd2c3b416c14
SHA1

f4eb512aa5c0fb9059a8fae1cd822bd9c91992cf
SHA256

82039f0956002ab4215ac1eec5ae1951408ff0fea64f87f924fd46faf844f15e
SHA512

0ac15e8795e3b52f8c01c376d17d321072ecf3eec9d363239ab24f2194595f6a29eb4cbd195cc29e820130f1d4a8811802c6563cf8431c438725cb9b46859010
SSDEEP

49152:fA6rKdfybQlb8Em0lP/PHNQsGE6+tlcwDXbuvDtk:XrKngUlPtQsG831burK

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	3236	1496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3576	1496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4220	1496	schtasks.exe	83
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1868	1496	schtasks.exe	83

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/4776-1-0x0000000000150000-0x0000000000362000-memory.dmp	dcrat
behavioral2/files/0x0007000000023c90-18.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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe

Executes dropped EXE 1 IoCs

pid	Process
644	taskhostw.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\taskhostw = "\"C:\\Windows\\System32\\wimgapi\\taskhostw.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchApp = "\"C:\\Windows\\SystemApps\\Microsoft.Windows.Search_cw5n1h2txyewy\\SearchApp\\SearchApp.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Documents and Settings\\services.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OfficeClickToRun = "\"C:\\Program Files\\Common Files\\microsoft shared\\ClickToRun\\AppVIsvApi\\OfficeClickToRun.exe\""	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\System32\wimgapi\taskhostw.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\System32\wimgapi\ea9f0e6c9e2dcd4dfacdaf29ba21541fb815a988	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVIsvApi\OfficeClickToRun.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVIsvApi\OfficeClickToRun.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVIsvApi\e6c9b481da804f07baff8eff543b0a1441069b5d	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp\SearchApp.exe	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
File created	C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp\38384e6a620884a6b69bcc56f80d556f9200171c	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.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-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe

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
4220	schtasks.exe
1868	schtasks.exe
3236	schtasks.exe
3576	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4776	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
4776	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
4776	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
4776	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
644	taskhostw.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4776	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe
Token: SeDebugPrivilege	644	taskhostw.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4776 wrote to memory of 2916	4776	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe	88
PID 4776 wrote to memory of 2916	4776	JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.exe	88
PID 2916 wrote to memory of 2096	2916	cmd.exe	90
PID 2916 wrote to memory of 2096	2916	cmd.exe	90
PID 2916 wrote to memory of 644	2916	cmd.exe	91
PID 2916 wrote to memory of 644	2916	cmd.exe	91

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_1d55b32e2aee97d34060fd2c3b416c14.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1d55b32e2aee97d34060fd2c3b416c14.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
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4776
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\MDlC4WFpOq.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2096
- - C:\Windows\System32\wimgapi\taskhostw.exe
    "C:\Windows\System32\wimgapi\taskhostw.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:644

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVIsvApi\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3236

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\wimgapi\taskhostw.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3576

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4220

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Documents and Settings\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1868

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\MDlC4WFpOq.bat

Filesize
205B

MD5
0bdd2e0d9c6ea5a6f653d3ca37fefa0d

SHA1
f4579433227cea4d22a881b0ef855726c97fcb74

SHA256
afa2cf6fad7c05afe20d43176d339955cc4089525101c68da21ecf11bb090953

SHA512
00bf385cdd497d336bc49b6c7be6a23576b7d33ebc584272837305c5ace3aeba5251987d13338cc0a3546a06f9fcc57b6551a499d765cc4dbf12c6432d33421f

Download Submit
C:\Windows\System32\wimgapi\taskhostw.exe

Filesize
2.0MB

MD5
1d55b32e2aee97d34060fd2c3b416c14

SHA1
f4eb512aa5c0fb9059a8fae1cd822bd9c91992cf

SHA256
82039f0956002ab4215ac1eec5ae1951408ff0fea64f87f924fd46faf844f15e

SHA512
0ac15e8795e3b52f8c01c376d17d321072ecf3eec9d363239ab24f2194595f6a29eb4cbd195cc29e820130f1d4a8811802c6563cf8431c438725cb9b46859010

Download Submit
memory/644-21-0x0000000000D30000-0x0000000000D3C000-memory.dmp

Filesize
48KB

Download
memory/644-22-0x0000000000E60000-0x0000000000E6C000-memory.dmp

Filesize
48KB

Download
memory/644-23-0x0000000000E90000-0x0000000000E98000-memory.dmp

Filesize
32KB

Download
memory/644-24-0x000000001B0F0000-0x000000001B146000-memory.dmp

Filesize
344KB

Download
memory/644-25-0x0000000000E70000-0x0000000000E7A000-memory.dmp

Filesize
40KB

Download
memory/644-26-0x0000000000EB0000-0x0000000000EB8000-memory.dmp

Filesize
32KB

Download
memory/644-27-0x0000000000EA0000-0x0000000000EA8000-memory.dmp

Filesize
32KB

Download
memory/4776-4-0x00007FFF98C70000-0x00007FFF99731000-memory.dmp

Filesize
10.8MB

Download
memory/4776-17-0x00007FFF98C70000-0x00007FFF99731000-memory.dmp

Filesize
10.8MB

Download
memory/4776-1-0x0000000000150000-0x0000000000362000-memory.dmp

Filesize
2.1MB

Download
memory/4776-0-0x00007FFF98C73000-0x00007FFF98C75000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads