djvu | 1dbc06d0bd544c3b5a1e49a8c416f6a1d29a7a6eda5031894df7bf5f49430656

General

Target

20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe
Size

1.1MB
MD5

850d0bc37d1f77efa73bb55eba7bfab4
SHA1

69075099a120d7c62f282251b49ae5c9a38a4781
SHA256

1dbc06d0bd544c3b5a1e49a8c416f6a1d29a7a6eda5031894df7bf5f49430656
SHA512

b9f439a742033b0951d5212d48cedcf46b34b903ee05ba7f0ba98c6b4d236d9b74acb953f41e6dda56fd2a4c4e5ac6d15900f9cb9b2620978f6d893f64e4f2b1
SSDEEP

24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO8GWQHUq7:F0dwAYZt6C31WeTVRPOhG7Uq7

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://tbpws.top/fhsgtsspen6/get.php

Attributes

extension
.wiot
offline_id
sZ9rF572Y03XTlUZsBUVlV9YksFOEsyIfGx58yt1
payload_url
http://securebiz.org/dl/build2.exe

http://tbpws.top/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 1 IoCs

Processes:

resource	yara_rule
behavioral2/files/0x000b0000000233db-9.dat	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

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

Processes:

20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

Processes:

icacls.exe

pid	Process
2632	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\caac51c8-eb20-407d-8a20-a5bcf917120b\\20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe\" --AutoStart"	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
18	api.2ip.ua
3	api.2ip.ua
4	api.2ip.ua

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 3 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:

20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exeicacls.exe20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

pid	Process
4276	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe
4276	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe
1912	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe
1912	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

description	pid	Process	procid_target
PID 4276 wrote to memory of 2632	4276	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe	86
PID 4276 wrote to memory of 2632	4276	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe	86
PID 4276 wrote to memory of 2632	4276	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe	86
PID 4276 wrote to memory of 1912	4276	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe	87
PID 4276 wrote to memory of 1912	4276	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe	87
PID 4276 wrote to memory of 1912	4276	20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe	87

C:\Users\Admin\AppData\Local\Temp\20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe
"C:\Users\Admin\AppData\Local\Temp\20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4276
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\caac51c8-eb20-407d-8a20-a5bcf917120b" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:2632
- C:\Users\Admin\AppData\Local\Temp\20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe
  "C:\Users\Admin\AppData\Local\Temp\20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
1KB

MD5
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8

Filesize
436B

MD5
971c514f84bba0785f80aa1c23edfd79

SHA1
732acea710a87530c6b08ecdf32a110d254a54c8

SHA256
f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895

SHA512
43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12

Filesize
174B

MD5
902a9f4ea1df96be6ad815d07798b805

SHA1
78c837ed8da258c8fbdbaa7bea09f636917a1792

SHA256
6270f56a4e4fc9699daa9af7944fd3c7bbb3ad51267bccfb76da328ab7fc0be4

SHA512
03b95c73c0823f582057de8f4fdb2ca3021767f8400383052f5f4872f2f9945fe0c4eb198aa741a1c39abf056332238485c7a2d58a97891b9e6b4dd678f17d43

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8

Filesize
170B

MD5
f0ffee8249616d4d0be375fe976a5cb6

SHA1
8e5dd54ef8099ea820822fc27f430145caa99c70

SHA256
df652ed0d5513218e710afed915188322ae031db82a97fbe0e8f433a16219b13

SHA512
de887a3dc6399ad323a0496e568a769d15b78d4305d1a138e4795838acdabec225e4c5fdfb9c9afbb13cf8ded11e3924149145fd5f168bf0d172b118ad9b47b3

Download Submit
C:\Users\Admin\AppData\Local\caac51c8-eb20-407d-8a20-a5bcf917120b\20240906850d0bc37d1f77efa73bb55eba7bfab4stop.exe

Filesize
1.1MB

MD5
850d0bc37d1f77efa73bb55eba7bfab4

SHA1
69075099a120d7c62f282251b49ae5c9a38a4781

SHA256
1dbc06d0bd544c3b5a1e49a8c416f6a1d29a7a6eda5031894df7bf5f49430656

SHA512
b9f439a742033b0951d5212d48cedcf46b34b903ee05ba7f0ba98c6b4d236d9b74acb953f41e6dda56fd2a4c4e5ac6d15900f9cb9b2620978f6d893f64e4f2b1

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads