metasploit | dad1a4bc2ec24bf8b689974ae5a7128d85482d970162a70ea40ea0e80fbfa8ee

General

Target

krpt.dll
Size

1.3MB
MD5

8acdc3de7aee7d7d7242d42e7e5254be
SHA1

d0be878a474170584ba3cfdfd19b22baa81f19df
SHA256

53acfefcda2e6e3f31786a2e2c7fa5bcb83380e284d919f03bfc6d31a6b3b76f
SHA512

13f541bda8961d649ec3ec1351413281fe2e340f17bce09a3c7b09a411f0b27fa7d0e5693399032ca725ef598c84096bfcc5d0f5775121fab7b89f323c0c1db0
SSDEEP

24576:FrqYkIXkv6WMVqgF7687IMFAO1KlyOQpppppppppppppppppppppp4KVmsdzaA+5:F+YB86Wr/2ImAJy

Score

10^/10

metasploit backdoor discovery trojan

Malware Config

Extracted

Family

metasploit

Version

encoder/shikata_ga_nai

Signatures

MetaSploit
Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.
trojan backdoor metasploit
Metasploit family
metasploit

Blocklisted process makes network request 1 IoCs

flow	pid	Process
9	3532	rundll32.exe

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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	rundll32.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 1 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	rundll32.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings	rundll32.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
1888	WINWORD.EXE
1888	WINWORD.EXE

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
1888	WINWORD.EXE
1888	WINWORD.EXE
1888	WINWORD.EXE
1888	WINWORD.EXE
1888	WINWORD.EXE
1888	WINWORD.EXE
1888	WINWORD.EXE
1888	WINWORD.EXE

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1220 wrote to memory of 3532	1220	rundll32.exe	83
PID 1220 wrote to memory of 3532	1220	rundll32.exe	83
PID 1220 wrote to memory of 3532	1220	rundll32.exe	83
PID 3532 wrote to memory of 1888	3532	rundll32.exe	84
PID 3532 wrote to memory of 1888	3532	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\krpt.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1220
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\krpt.dll,#1
  2⤵
  - Blocklisted process makes network request
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3532
- - C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\冠状病毒实时更新：中国正在追踪来自湖北的旅行者.doc" /o ""
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious use of SetWindowsHookEx
    PID:1888

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\TCDDD70.tmp\gb.xsl

Filesize
262KB

MD5
51d32ee5bc7ab811041f799652d26e04

SHA1
412193006aa3ef19e0a57e16acf86b830993024a

SHA256
6230814bf5b2d554397580613e20681752240ab87fd354ececf188c1eabe0e97

SHA512
5fc5d889b0c8e5ef464b76f0c4c9e61bda59b2d1205ac9417cc74d6e9f989fb73d78b4eb3044a1a1e1f2c00ce1ca1bd6d4d07eeadc4108c7b124867711c31810

Download Submit
C:\Users\Admin\AppData\Local\Temp\冠状病毒实时更新：中国正在追踪来自湖北的旅行者.doc

Filesize
713KB

MD5
c5b98b77810c5619d20b71791b820529

SHA1
0c9bcc7e92c9557d4f2072e40af0e5e029d92c15

SHA256
fb82f32b9ce1d63cc86ab6ee93b9e619056222af181578d2f8ed38ee6474c092

SHA512
e6f16c71d3aefff8789c28b1a8abbcb47680dbdced912f50d318a9037c6f56bfe0a48e5cbf879ef24cecff03a5af937f8ec4b25c8230229730f71c38453da2b4

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\UProof\CUSTOM.DIC

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms

Filesize
1KB

MD5
915dbad9f426c6d774a0cd620d0cac41

SHA1
9b1077c8f7b07414c4fda505becdc8bb601bd7ed

SHA256
804ba55381041dd75376831216975237b5057f46697bab1095d8a8973bbddcd0

SHA512
8dc1924e21d96ddec0cea80db688e899dd9c19bb745452ef39e755004842d06b397583059bdb9c6ec7d89f141079e7d71b507636c87644051689fb73c2f931c0

Download Submit
memory/1888-17-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-20-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-9-0x00007FFDB15D0000-0x00007FFDB15E0000-memory.dmp

Filesize
64KB

Download
memory/1888-14-0x00007FFDB15D0000-0x00007FFDB15E0000-memory.dmp

Filesize
64KB

Download
memory/1888-16-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-15-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-11-0x00007FFDB15D0000-0x00007FFDB15E0000-memory.dmp

Filesize
64KB

Download
memory/1888-22-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-21-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-10-0x00007FFDB15D0000-0x00007FFDB15E0000-memory.dmp

Filesize
64KB

Download
memory/1888-19-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-23-0x00007FFDAEC70000-0x00007FFDAEC80000-memory.dmp

Filesize
64KB

Download
memory/1888-18-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-24-0x00007FFDAEC70000-0x00007FFDAEC80000-memory.dmp

Filesize
64KB

Download
memory/1888-13-0x00007FFDB15D0000-0x00007FFDB15E0000-memory.dmp

Filesize
64KB

Download
memory/1888-43-0x00007FFDF1550000-0x00007FFDF1745000-memory.dmp

Filesize
2.0MB

Download
memory/1888-12-0x00007FFDF15ED000-0x00007FFDF15EE000-memory.dmp

Filesize
4KB

Download
memory/3532-8-0x0000000002970000-0x0000000002A00000-memory.dmp

Filesize
576KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads