djvu | 16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269

General

Target

16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe
Size

805KB
MD5

b1e081156b5b88d8267cccf93bd731ed
SHA1

0bffc988f4266430695aea25e1d0edace2abd8e9
SHA256

16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269
SHA512

3b77c773e0017b8ec78cba2548155596427f60f35e74047223ee771656405ba5bfae9c08134498225d93a44ba9616bfc5e8326e557a4d90cb01cf1006e5fa80b
SSDEEP

24576:I67+TgcFsMeBdmmmrMXXI9fgU7QCx8+oi8:I++TtsMydmmmAXXIJgU0CxF

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes

extension
.wwpl
offline_id
LtYnlJvK0hICyOCeum6Tv4pbia9jcIGHVgA3Xht1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-xoUXGr6cqT Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0786JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral2/memory/4432-2-0x0000000002640000-0x000000000275B000-memory.dmp	family_djvu
behavioral2/memory/1228-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1228-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1532-25-0x0000000000400000-0x0000000000537000-memory.dmp	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2136	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4dcb620c-d76c-43d6-bbd2-dd95eadd46f8\\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe\" --AutoStart"	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
27	api.2ip.ua
28	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4432 set thread context of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 1880 set thread context of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2800	1532	WerFault.exe	91

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1228	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe
1228	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 4432 wrote to memory of 1228	4432	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	85
PID 1228 wrote to memory of 2136	1228	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	88
PID 1228 wrote to memory of 2136	1228	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	88
PID 1228 wrote to memory of 2136	1228	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	88
PID 1228 wrote to memory of 1880	1228	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	89
PID 1228 wrote to memory of 1880	1228	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	89
PID 1228 wrote to memory of 1880	1228	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	89
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91
PID 1880 wrote to memory of 1532	1880	16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe	91

C:\Users\Admin\AppData\Local\Temp\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe
"C:\Users\Admin\AppData\Local\Temp\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Users\Admin\AppData\Local\Temp\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe
  "C:\Users\Admin\AppData\Local\Temp\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1228
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4dcb620c-d76c-43d6-bbd2-dd95eadd46f8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2136
- - C:\Users\Admin\AppData\Local\Temp\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe
    "C:\Users\Admin\AppData\Local\Temp\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1880
  - - C:\Users\Admin\AppData\Local\Temp\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe
      "C:\Users\Admin\AppData\Local\Temp\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:1532
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1532 -s 568
        5⤵
        Program crash
        
        PID:2800

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1532 -ip 1532
1⤵
PID:724

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\4dcb620c-d76c-43d6-bbd2-dd95eadd46f8\16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269.exe

Filesize
805KB

MD5
b1e081156b5b88d8267cccf93bd731ed

SHA1
0bffc988f4266430695aea25e1d0edace2abd8e9

SHA256
16b546c9dfbff637ac3ebec6f2c4e71e055f899006c6a1eb015e47e5b4827269

SHA512
3b77c773e0017b8ec78cba2548155596427f60f35e74047223ee771656405ba5bfae9c08134498225d93a44ba9616bfc5e8326e557a4d90cb01cf1006e5fa80b

Download Submit
memory/1228-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1228-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1228-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1228-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1228-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1532-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1532-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1532-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1880-20-0x00000000023F0000-0x0000000002485000-memory.dmp

Filesize
596KB

Download
memory/4432-1-0x00000000025A0000-0x0000000002633000-memory.dmp

Filesize
588KB

Download
memory/4432-2-0x0000000002640000-0x000000000275B000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads