dcrat | b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205

Analysis

max time kernel
120s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28-11-2024 18:03

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General

Target

b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe
Size

4.2MB
MD5

2608e3e0677de70d9e1eb6b108f7bdfd
SHA1

c7d42a6abb29fcbde1cdc13f681d449ced6b8a50
SHA256

b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205
SHA512

e1664a02f3e0b101ada2ef5af8fdebc4b75aecc795c1fa04cab36e7b478c11516d8daba1f65159ad7d8c2b9680dd771fac5ba24218b861807851042f1ba82c9d
SSDEEP

49152:2chlG/HMHyN4pAEx/7dvDhzETOIntW9y3yP2QAuxQzxEzwYjiwVTkO2kZBtk8hJq:

Score

10^/10

dcrat discovery infostealer 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

Detected Nirsoft tools 1 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

Processes:

resource	yara_rule
behavioral1/files/0x00080000000120f9-9.dat	Nirsoft

Executes dropped EXE 4 IoCs

Processes:

sqls306.exedrivEn306.exesurrogateProviderRuntime.exedllhost.exe

pid	Process
2524	sqls306.exe
2340	drivEn306.exe
2684	surrogateProviderRuntime.exe
1348	dllhost.exe

Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid	Process
2616	cmd.exe
2616	cmd.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 2 IoCs

Processes:

surrogateProviderRuntime.exe

description	ioc	Process
File created	C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\spoolsv.exe	surrogateProviderRuntime.exe
File created	C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.0\f3b6ecef712a24	surrogateProviderRuntime.exe

Drops file in Windows directory 2 IoCs

Processes:

surrogateProviderRuntime.exe

description	ioc	Process
File created	C:\Windows\PolicyDefinitions\en-US\dllhost.exe	surrogateProviderRuntime.exe
File created	C:\Windows\PolicyDefinitions\en-US\5940a34987c991	surrogateProviderRuntime.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 4 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

Processes:

sqls306.exedrivEn306.exeWScript.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sqls306.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	drivEn306.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

surrogateProviderRuntime.exedllhost.exe

pid	Process
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
2684	surrogateProviderRuntime.exe
1348	dllhost.exe
1348	dllhost.exe
1348	dllhost.exe
1348	dllhost.exe
1348	dllhost.exe
1348	dllhost.exe
1348	dllhost.exe
1348	dllhost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

sqls306.exe

pid	Process
2524	sqls306.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

sqls306.exe

description	pid	Process
Token: SeBackupPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeBackupPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeBackupPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe
Token: SeSecurityPrivilege	2524	sqls306.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exedrivEn306.exeWScript.execmd.exesurrogateProviderRuntime.execmd.exe

description	pid	Process	procid_target
PID 3048 wrote to memory of 2524	3048	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	30
PID 3048 wrote to memory of 2524	3048	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	30
PID 3048 wrote to memory of 2524	3048	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	30
PID 3048 wrote to memory of 2524	3048	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	30
PID 3048 wrote to memory of 2340	3048	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	31
PID 3048 wrote to memory of 2340	3048	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	31
PID 3048 wrote to memory of 2340	3048	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	31
PID 3048 wrote to memory of 2340	3048	b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe	31
PID 2340 wrote to memory of 2880	2340	drivEn306.exe	32
PID 2340 wrote to memory of 2880	2340	drivEn306.exe	32
PID 2340 wrote to memory of 2880	2340	drivEn306.exe	32
PID 2340 wrote to memory of 2880	2340	drivEn306.exe	32
PID 2880 wrote to memory of 2616	2880	WScript.exe	34
PID 2880 wrote to memory of 2616	2880	WScript.exe	34
PID 2880 wrote to memory of 2616	2880	WScript.exe	34
PID 2880 wrote to memory of 2616	2880	WScript.exe	34
PID 2616 wrote to memory of 2684	2616	cmd.exe	36
PID 2616 wrote to memory of 2684	2616	cmd.exe	36
PID 2616 wrote to memory of 2684	2616	cmd.exe	36
PID 2616 wrote to memory of 2684	2616	cmd.exe	36
PID 2684 wrote to memory of 876	2684	surrogateProviderRuntime.exe	37
PID 2684 wrote to memory of 876	2684	surrogateProviderRuntime.exe	37
PID 2684 wrote to memory of 876	2684	surrogateProviderRuntime.exe	37
PID 876 wrote to memory of 592	876	cmd.exe	39
PID 876 wrote to memory of 592	876	cmd.exe	39
PID 876 wrote to memory of 592	876	cmd.exe	39
PID 876 wrote to memory of 600	876	cmd.exe	40
PID 876 wrote to memory of 600	876	cmd.exe	40
PID 876 wrote to memory of 600	876	cmd.exe	40
PID 876 wrote to memory of 1348	876	cmd.exe	41
PID 876 wrote to memory of 1348	876	cmd.exe	41
PID 876 wrote to memory of 1348	876	cmd.exe	41

C:\Users\Admin\AppData\Local\Temp\b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe
"C:\Users\Admin\AppData\Local\Temp\b02038aa2ee3194542d8e062aedcbb66015051ae31d5c0ec6a68dd7a26ef6205.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3048
- C:\Users\Admin\AppData\Local\Temp\sqls306.exe
  "C:\Users\Admin\AppData\Local\Temp\sqls306.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:2524
- C:\Users\Admin\AppData\Local\Temp\drivEn306.exe
  "C:\Users\Admin\AppData\Local\Temp\drivEn306.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2340
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\browserFont\TGs0Esj.vbe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2880
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\browserFont\mb1tDxvM2A2eBj7RCoqZN.bat" "
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2616
    - - C:\browserFont\surrogateProviderRuntime.exe
        
        "C:\browserFont/surrogateProviderRuntime.exe"
        5⤵
        Executes dropped EXE
        Drops file in Program Files directory
        Drops file in Windows directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:2684
      - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\vrKwwupZpr.bat"
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:876
        
        C:\Windows\system32\chcp.com
        
        chcp 65001
        7⤵
        
        PID:592
        
        C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        7⤵
        
        PID:600
        
        C:\Windows\PolicyDefinitions\en-US\dllhost.exe
        
        "C:\Windows\PolicyDefinitions\en-US\dllhost.exe"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        
        PID:1348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\drivEn306.exe

Filesize
1.4MB

MD5
c04481d4d848f2edb537085ffdef01c5

SHA1
d0c1d5c2efdc1460b577720eb633c23876ada172

SHA256
a9cefa666264302fae07664e374cc1cf3b29a956f1da1219013853c66b4b0c46

SHA512
f3edf74e3ee0438999a64496cafa5a6485efae74f54674d73a2b4979de0483c896e28fab2376c40399d9cd6d627c56fefe5c652ed00671487250dacb7a05833c

Download Submit
C:\Users\Admin\AppData\Local\Temp\sqls306.exe

Filesize
130KB

MD5
f27a284ef9b018cdd2a98a7b78ccdcb3

SHA1
67e260b11e6227c18cae8925b4f6899103c607f2

SHA256
af86dc3f76d39b67b967a3b714e9e70ed43eec8d3871e9691cb45d84372b53fb

SHA512
9a8811f13517748539308a70933b126a3348407f397bf30f903019379f927532c64015853b94acf21bdbc554d638a0265d4394d026e289103db06fe93fe5524b

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

Filesize
222B

MD5
fe8c9c64948fe8c195759ae882f3759b

SHA1
1fa18ac432430ec948af5582a45ae23c5c6a8f08

SHA256
a5b4945f9a39e7881e93e5acaf6244e2b53acf25346abad5b4bff07f84fb1933

SHA512
577a4bb79e6e44b1edacb1da104de5b209f8627e34273b2343f26320140a874893fa2b122145a5c5b470679d57de1503b353d8e579d172b1a949b45ecff3a336

Download Submit
C:\browserFont\TGs0Esj.vbe

Filesize
211B

MD5
fc357bcdbf37df98247d511ccd38d22d

SHA1
0c4678b855b654c4a7182acec115482f3c7e4c5c

SHA256
41e73fcfa7fda29c62dd424e2eef794ba21c69239a1d0e4f92f29257162d4dc1

SHA512
d5370ef435382cd3192cd2b79374b270cf107b3f87132c8b09ce159603062c7f331f8b155a90789a68eaae85908bb9a3a1593247594f215412018ad0b061879d

Download Submit
C:\browserFont\mb1tDxvM2A2eBj7RCoqZN.bat

Filesize
85B

MD5
6bf7667bb9a6e818187ce67416332560

SHA1
57ebd093a1349a374aa13851cd1ff437b0c8fe14

SHA256
8ca638a3493bfef0418b1abc231eeac08d86f64853cbbf0ba8ad0d3d0d400d76

SHA512
1105eb7d88058d4a646a4cc0937c813ecbb36a988ce66e739a8b24147f2038860ed9f2ca4486ed7233d79692bdc2ee9ca933b3b00d8233d91fc3f9447f93a0be

Download Submit
\browserFont\surrogateProviderRuntime.exe

Filesize
1.6MB

MD5
418fcd513c372d02a740a87d9c4d0d5f

SHA1
32180f6394d72e1f5ca2cfebbe683b6fbcb8da34

SHA256
67c96692f7eff8187ab7a8d54cb15cfa9ae91732c72a6bac093982d1b4838411

SHA512
6eb8ebc542e8653e4ef8133c23c3618cd12203adbc6761fb7871b0c1df65609182fec13536cf28687db618b7c9a21dd06f90f77018c4cc3e778cc7136cc07458

Download Submit
memory/1348-47-0x0000000000F20000-0x00000000010B8000-memory.dmp

Filesize
1.6MB

Download
memory/2684-28-0x0000000000C80000-0x0000000000E18000-memory.dmp

Filesize
1.6MB

Download
memory/3048-0-0x000007FEF5BBE000-0x000007FEF5BBF000-memory.dmp

Filesize
4KB

Download
memory/3048-3-0x000007FEF5900000-0x000007FEF629D000-memory.dmp

Filesize
9.6MB

Download
memory/3048-7-0x000007FEF5900000-0x000007FEF629D000-memory.dmp

Filesize
9.6MB

Download
memory/3048-13-0x000007FEF5900000-0x000007FEF629D000-memory.dmp

Filesize
9.6MB

Download