dcrat | 708f1bcec066db275b751c43a2b92fe54ea5f82e33c61b0114a249476a9ad8d6

Analysis

max time kernel
139s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30/10/2024, 01:09

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General

Target

RakBot.exe
Size

1.1MB
MD5

0a4bcbacfca9876e5914933a8481391e
SHA1

91876f816adca7cd5eace2b23134eac094ea78ae
SHA256

708f1bcec066db275b751c43a2b92fe54ea5f82e33c61b0114a249476a9ad8d6
SHA512

7b089c7c6c6f22015cda9d74b8fbfcd7c29fad97c1eb62b3af6c3ab4b0b6994a07e258795ede117b7fab6057fca3c34de1afde010b830a5cbffdc78d42a598f7
SSDEEP

24576:l9h9ghwRVQAOBdlSER9MysrYx4ltFbc+Dyd8oC:lr9k3lPLMJYxEv0C

Score

10^/10

dcrat discovery infostealer rat spyware stealer

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

DCRat payload 3 IoCs

rat

resource	yara_rule
behavioral2/files/0x0010000000023b4b-22.dat	family_dcrat_v2
behavioral2/memory/2984-27-0x0000000000400000-0x00000000004E6000-memory.dmp	family_dcrat_v2
behavioral2/memory/3276-31-0x0000000000A90000-0x0000000000B40000-memory.dmp	family_dcrat_v2

Checks computer location settings 2 TTPs 2 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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	RakBot.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	zrtMbE5WcO.exe

Executes dropped EXE 3 IoCs

pid	Process
1344	olunf8EAGw.exe
3276	zrtMbE5WcO.exe
1132	lsass.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3412 set thread context of 2984	3412	RakBot.exe	91

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\lsass.exe	zrtMbE5WcO.exe
File created	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\6203df4a6bafc7	zrtMbE5WcO.exe
File created	C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\lsass.exe	zrtMbE5WcO.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\CSC\Idle.exe	zrtMbE5WcO.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	RakBot.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RakBot.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000_Classes\Local Settings	zrtMbE5WcO.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
3276	zrtMbE5WcO.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe
1132	lsass.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1132	lsass.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3276	zrtMbE5WcO.exe
Token: SeDebugPrivilege	1132	lsass.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 3412 wrote to memory of 4216	3412	RakBot.exe	90
PID 3412 wrote to memory of 4216	3412	RakBot.exe	90
PID 3412 wrote to memory of 4216	3412	RakBot.exe	90
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 3412 wrote to memory of 2984	3412	RakBot.exe	91
PID 2984 wrote to memory of 1344	2984	RakBot.exe	93
PID 2984 wrote to memory of 1344	2984	RakBot.exe	93
PID 2984 wrote to memory of 3276	2984	RakBot.exe	95
PID 2984 wrote to memory of 3276	2984	RakBot.exe	95
PID 3276 wrote to memory of 2956	3276	zrtMbE5WcO.exe	97
PID 3276 wrote to memory of 2956	3276	zrtMbE5WcO.exe	97
PID 2956 wrote to memory of 2972	2956	cmd.exe	99
PID 2956 wrote to memory of 2972	2956	cmd.exe	99
PID 2956 wrote to memory of 1220	2956	cmd.exe	100
PID 2956 wrote to memory of 1220	2956	cmd.exe	100
PID 2956 wrote to memory of 1132	2956	cmd.exe	104
PID 2956 wrote to memory of 1132	2956	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\RakBot.exe
"C:\Users\Admin\AppData\Local\Temp\RakBot.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3412
- C:\Users\Admin\AppData\Local\Temp\RakBot.exe
  "C:\Users\Admin\AppData\Local\Temp\RakBot.exe"
  2⤵
  PID:4216
- C:\Users\Admin\AppData\Local\Temp\RakBot.exe
  "C:\Users\Admin\AppData\Local\Temp\RakBot.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2984
- - C:\Users\Admin\AppData\Roaming\olunf8EAGw.exe
    "C:\Users\Admin\AppData\Roaming\olunf8EAGw.exe"
    3⤵
    - Executes dropped EXE
    PID:1344
- - C:\Users\Admin\AppData\Roaming\zrtMbE5WcO.exe
    "C:\Users\Admin\AppData\Roaming\zrtMbE5WcO.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - 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:3276
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\56Xzv9CPOa.bat"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2956
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:2972
    - - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        5⤵
        
        PID:1220
    - - C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\lsass.exe
        
        "C:\Program Files (x86)\Windows Sidebar\Shared Gadgets\lsass.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of AdjustPrivilegeToken
        
        PID:1132

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\56Xzv9CPOa.bat

Filesize
239B

MD5
b1e1a68a0c54adfaa522ccd242da0be6

SHA1
36f176281d2d24755243a2612f55cde1230e83db

SHA256
b35737c6d590f21fa2f7b16447061b8e28e1fe3ed61d4a48e0d806c674ac5a1f

SHA512
7820e5a2ba4dc8b5e2ca6da9b7957ce138c6d8f4e97dcf13e2b24171eaf1180dbf9f8617f832478495b9731413920568adb649befee788d7a854cb5afe02c3ad

Download Submit
C:\Users\Admin\AppData\Roaming\olunf8EAGw.exe

Filesize
18KB

MD5
f3edff85de5fd002692d54a04bcb1c09

SHA1
4c844c5b0ee7cb230c9c28290d079143e00cb216

SHA256
caf29650446db3842e1c1e8e5e1bafadaf90fc82c5c37b9e2c75a089b7476131

SHA512
531d920e2567f58e8169afc786637c1a0f7b9b5c27b27b5f0eddbfc3e00cecd7bea597e34061d836647c5f8c7757f2fe02952a9793344e21b39ddd4bf7985f9d

Download Submit
C:\Users\Admin\AppData\Roaming\zrtMbE5WcO.exe

Filesize
674KB

MD5
1088e239e86c2316358d4e5b82810fa2

SHA1
5a16e420b1aa52c4dcd9f0bced05a59e679997a5

SHA256
0fa75c70f7304d35a4aed13dfe72793008610b429820ab8bc2ad45d3abd5e1b2

SHA512
2b79a3aca00ab269d1d8a1874bc0ce3ab06d18aa8c0d1af363f54b569e16e3a0c0fbf88ca4e76f5db3e2302e7d7b20a59bf6c76295c96179ded03c71060ac073

Download Submit
memory/2984-1-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2984-4-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2984-5-0x0000000000940000-0x0000000000A5C000-memory.dmp

Filesize
1.1MB

Download
memory/2984-3-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2984-2-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2984-27-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/3276-31-0x0000000000A90000-0x0000000000B40000-memory.dmp

Filesize
704KB

Download
memory/3276-32-0x00007FFCC9180000-0x00007FFCC9C41000-memory.dmp

Filesize
10.8MB

Download
memory/3276-34-0x0000000002AB0000-0x0000000002ACC000-memory.dmp

Filesize
112KB

Download
memory/3276-35-0x00007FFCC9180000-0x00007FFCC9C41000-memory.dmp

Filesize
10.8MB

Download
memory/3276-36-0x0000000002B20000-0x0000000002B70000-memory.dmp

Filesize
320KB

Download
memory/3276-38-0x0000000002AD0000-0x0000000002AE8000-memory.dmp

Filesize
96KB

Download
memory/3276-45-0x00007FFCC9180000-0x00007FFCC9C41000-memory.dmp

Filesize
10.8MB

Download
memory/3276-53-0x00007FFCC9180000-0x00007FFCC9C41000-memory.dmp

Filesize
10.8MB

Download
memory/3276-30-0x00007FFCC9183000-0x00007FFCC9185000-memory.dmp

Filesize
8KB

Download
memory/3276-57-0x00007FFCC9180000-0x00007FFCC9C41000-memory.dmp

Filesize
10.8MB

Download
memory/3412-0-0x0000000000A55000-0x0000000000A56000-memory.dmp

Filesize
4KB

Download