djvu | 25fee0d9c2bf841ad0c0271a34e450d2a82dcc91d6fd7c669b9882fc436e06ea

General

Target

2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
Size

1.1MB
MD5

591b5afb1f701910bb6b2a95e83b9f15
SHA1

f3c0a74e0c38e75ec86195c83244831ae21cde58
SHA256

25fee0d9c2bf841ad0c0271a34e450d2a82dcc91d6fd7c669b9882fc436e06ea
SHA512

a66af28164683d16522e4c2a446ccaf1c9f64cbd743747c25359a2dc31e011683c1e852a829361ec61b9cdd7479114823fb684e28c7fa8754fd173f3c9b1f4ea
SSDEEP

24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO8SWQHUq7:F0dwAYZt6C31WeTVRPOhS7Uq7

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://vrta.top/nddddhsspen6/get.php

Attributes

extension
.qscx
offline_id
1CWYcKrbjXlx3TNdvKiBjYphw1eJfZy1dzTnE8t1
payload_url
http://vrta.top/files/penelop/updatewin1.exe

http://vrta.top/files/penelop/updatewin2.exe

http://vrta.top/files/penelop/updatewin.exe

http://vrta.top/files/penelop/3.exe

http://vrta.top/files/penelop/4.exe

http://vrta.top/files/penelop/5.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-V2fE396VPW 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: 0303ewgfDd

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 1 IoCs

resource	yara_rule
behavioral1/files/0x0007000000019604-18.dat	family_djvu

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

Executes dropped EXE 1 IoCs

pid	Process
1724	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2812	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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0fccf1fe-7ff7-4834-b342-5859158bc247\\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe\" --AutoStart"	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe

Looks up external IP address via web service 4 IoCs

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

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua
21	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 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
2164	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
2164	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
1724	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
1724	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2716 wrote to memory of 2812	2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe	30
PID 2716 wrote to memory of 2812	2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe	30
PID 2716 wrote to memory of 2812	2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe	30
PID 2716 wrote to memory of 2812	2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe	30
PID 2716 wrote to memory of 2164	2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe	31
PID 2716 wrote to memory of 2164	2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe	31
PID 2716 wrote to memory of 2164	2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe	31
PID 2716 wrote to memory of 2164	2716	2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe	31
PID 2084 wrote to memory of 1724	2084	taskeng.exe	38
PID 2084 wrote to memory of 1724	2084	taskeng.exe	38
PID 2084 wrote to memory of 1724	2084	taskeng.exe	38
PID 2084 wrote to memory of 1724	2084	taskeng.exe	38

C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2716
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:2812
- C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
  "C:\Users\Admin\AppData\Local\Temp\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2164

C:\Windows\system32\taskeng.exe
taskeng.exe {AA69A64B-C6AC-473E-9FB8-12321A329E32} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe
  C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe --Task
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1724

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

System Information Discovery

1

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
38abad8036e71ed42d84870b2e4bd4a0

SHA1
b91e1c0f4214bedff0ac31f94290ce90c91e5537

SHA256
1d94765d6f9417f5f69b9ebb8a16628b5778259a93ee017d039cb10af5cdae7f

SHA512
11f5c204baf4154f3b945f947996ee6b437d3195ca52852127ceaa175a28cee9b49e62e35011c8bc631f495222791a61c1e4ae5a73d9e847d6978fcbbe024775

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
dc7d1c37e6f5e410d648a34a9ed64c49

SHA1
adcad5fc01c17e6a71c3a1bbae58f476f913b382

SHA256
d48e2e7a5fbf2335b5f379c6553b4ec73302df8389b6c4f1b29d251e97958935

SHA512
9588add20c5bfec3349df23436d09e60c420d571280a0a83925574231192d52d59f9a9f0cce3d4170a5cfef9e89c4c0bfaeba118e1db7121b48470f5f367c95a

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

Filesize
170B

MD5
d0aca34d6b1193cc9fc178f329f9e47c

SHA1
08e10159b2fb45ee73ba1c49c81c27c75627f3e8

SHA256
036559b9513f0b05daba304895b91e13dde083ca719f8f23a945fd46728a45ef

SHA512
e06991dd9919c56875a56dc2ccdd6f7151817a0719277db402fd8c669841f5918749b5d8151336fbd25dc3d490565ccf0c0db9b9682857134915e6f3a05ffff2

Download Submit
C:\Users\Admin\AppData\Local\0fccf1fe-7ff7-4834-b342-5859158bc247\2024-09-04_591b5afb1f701910bb6b2a95e83b9f15_stop.exe

Filesize
1.1MB

MD5
591b5afb1f701910bb6b2a95e83b9f15

SHA1
f3c0a74e0c38e75ec86195c83244831ae21cde58

SHA256
25fee0d9c2bf841ad0c0271a34e450d2a82dcc91d6fd7c669b9882fc436e06ea

SHA512
a66af28164683d16522e4c2a446ccaf1c9f64cbd743747c25359a2dc31e011683c1e852a829361ec61b9cdd7479114823fb684e28c7fa8754fd173f3c9b1f4ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab2A7A.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5504.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads