dcrat | d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb

General

Target

d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe
Size

281KB
MD5

6de2a94806bae07e459be58657bb4f5f
SHA1

0dec24173222232f2f2117035bff1b66cad2d89b
SHA256

d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb
SHA512

51a3246c916f430c7a2902b3fe386fc7795b040e506fdd37bae236c52e11d8dab4452243c8c90cd86df9d074b6f7c5891f234ab6685139b86dd1962af0078fbc
SSDEEP

6144:0vkvlUJFt3z4VmX7P1B+VI4FrhLzUgIuN+w8l91Vvzq93:+o4JzBT1CFrhnUgIuN+wcjvU3

Score

10^/10

dcrat infostealer rat upx

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

Processes:

resource	yara_rule
C:\hostsvc\crtmonitor.exe	dcrat
C:\hostsvc\crtmonitor.exe	dcrat
behavioral2/memory/2224-141-0x000001D789A80000-0x000001D789AE4000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

Processes:

crtmonitor.exe

pid process

2224 crtmonitor.exe

pid	process
2224	crtmonitor.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/4208-132-0x00000000007B0000-0x0000000000824000-memory.dmp	upx
behavioral2/memory/4208-134-0x00000000007B0000-0x0000000000824000-memory.dmp	upx

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

Processes:

d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exeWScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	WScript.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings	d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

crtmonitor.exe

pid process

2224 crtmonitor.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

crtmonitor.exe

description pid process

Token: SeDebugPrivilege 2224 crtmonitor.exe

pid	process
2224	crtmonitor.exe

description	pid	process
Token: SeDebugPrivilege	2224	crtmonitor.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exeWScript.execmd.exe

description	pid	process	target process
PID 4208 wrote to memory of 1208	4208	d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe	WScript.exe
PID 4208 wrote to memory of 1208	4208	d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe	WScript.exe
PID 4208 wrote to memory of 1208	4208	d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe	WScript.exe
PID 1208 wrote to memory of 4748	1208	WScript.exe	cmd.exe
PID 1208 wrote to memory of 4748	1208	WScript.exe	cmd.exe
PID 1208 wrote to memory of 4748	1208	WScript.exe	cmd.exe
PID 4748 wrote to memory of 2224	4748	cmd.exe	crtmonitor.exe
PID 4748 wrote to memory of 2224	4748	cmd.exe	crtmonitor.exe

C:\Users\Admin\AppData\Local\Temp\d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe
"C:\Users\Admin\AppData\Local\Temp\d5914e8e96a5cd479741c66169d4d0d771fdc5106bb39b85f866dd1ae210f2bb.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4208

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\hostsvc\q4bIy4aOfwVoahX1OcOmZTaZh6qfFN.vbe"
2⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1208

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\hostsvc\pvCgYDYM7Xq2Gs09KW8XYxp5ROf9kO.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:4748

C:\hostsvc\crtmonitor.exe
"C:\hostsvc\crtmonitor.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2224

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\hostsvc\crtmonitor.exe
Filesize
365KB

MD5
329b6db0f7363e4aa1b1ac2c85c17a8a

SHA1
b07fc798770f7de58768f968bafb6ce3aec10bd2

SHA256
cbf11f1253eff61260bd612c439d76a043dd34146a16b979ed9a99f61d6bc9dd

SHA512
70390cbd2e959df4a812bca814a160b1a184c15718458962c83b3a68beafb79d3ffc0b317f7c310abec96ab46c898129500bb04ff9e92593b2393cb8cc1e3794

Download Submit
C:\hostsvc\crtmonitor.exe
Filesize
365KB

MD5
329b6db0f7363e4aa1b1ac2c85c17a8a

SHA1
b07fc798770f7de58768f968bafb6ce3aec10bd2

SHA256
cbf11f1253eff61260bd612c439d76a043dd34146a16b979ed9a99f61d6bc9dd

SHA512
70390cbd2e959df4a812bca814a160b1a184c15718458962c83b3a68beafb79d3ffc0b317f7c310abec96ab46c898129500bb04ff9e92593b2393cb8cc1e3794

Download Submit
C:\hostsvc\pvCgYDYM7Xq2Gs09KW8XYxp5ROf9kO.bat
Filesize
27B

MD5
571441ceadc99e4a7c0a7be605671aca

SHA1
06116760cf0607b1cf9433aa3ec46d1b25a9b3b9

SHA256
684f245a086cde0da133bf80c8dcb85fd3f4ac76d5deb6f42d8e387fde56af2c

SHA512
dca5c2533ee57d23fa0f7c5283d6d9c679b96e61ea78fad26c223f24cdf770e91917cb0b810bb9bbb86915650d0b700648f44a8d9aabccd46130e0aba2758088

Download Submit
C:\hostsvc\q4bIy4aOfwVoahX1OcOmZTaZh6qfFN.vbe
Filesize
219B

MD5
fb843ca724b2b188757bb2ce12eeec72

SHA1
0d87f6dd9f34df31bb34c4a9e77e61d6dc440bd3

SHA256
1572cb4d25ae49bb04314b33ae03120636d8e877dba002c10b4514ef344abf3d

SHA512
beafc5564eac7362dc86d42d65d6ebb1e57f2fd3c2cf88c9a44843f196e3e8bbec4ddf63ee0183d3c87dcbb8868afa2e0c8460595542b9eaa1d7c8b7cfbbb970

Download Submit
memory/1208-133-0x0000000000000000-mapping.dmp

Download
memory/2224-138-0x0000000000000000-mapping.dmp

Download
memory/2224-141-0x000001D789A80000-0x000001D789AE4000-memory.dmp

Filesize
400KB

Download
memory/2224-142-0x00007FFA66E70000-0x00007FFA67931000-memory.dmp

Filesize
10.8MB

Download
memory/2224-143-0x00007FFA66E70000-0x00007FFA67931000-memory.dmp

Filesize
10.8MB

Download
memory/4208-132-0x00000000007B0000-0x0000000000824000-memory.dmp

Filesize
464KB

Download
memory/4208-134-0x00000000007B0000-0x0000000000824000-memory.dmp

Filesize
464KB

Download
memory/4748-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads