djvu | 3fce9a2c37ee6008225bd0f8d10884612472e14c28ea492eb2042360ee47dea4

General

Target

20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe
Size

1.1MB
MD5

bcf8e002b1b07307c4b4db8243ee854f
SHA1

2513979c04b7ab3d3a77a29219a3219b1dec4949
SHA256

3fce9a2c37ee6008225bd0f8d10884612472e14c28ea492eb2042360ee47dea4
SHA512

d979566cd79529ae3a5667dab12cf3e94b1dc5e086b68407b9c2a474a67f4b95e5af54da8ef199bacb0cab2840b6c94c9025409cfcd004d61861b93f51452031
SSDEEP

24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO8KWQHUq7:F0dwAYZt6C31WeTVRPOhK7Uq7

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://tzgl.org/fhsgtsspen6/get.php

Attributes

extension
.xcmb
offline_id
PN9lPPL0xn5HdNFrN1JTJ7oVcWFkXn2HzoupUzt1
payload_url
http://kotob.top/dl/build2.exe

http://tzgl.org/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-gtSNjaG9aa 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: 0365Odkfg

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 1 IoCs

resource	yara_rule
behavioral1/files/0x0008000000015e05-14.dat	family_djvu

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

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2776	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\\4dda091d-ce62-4c1a-86b8-eb43ea5e1bf7\\20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe\" --AutoStart"	20240906bcf8e002b1b07307c4b4db8243ee854fstop.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.

flow	ioc
4	api.2ip.ua
5	api.2ip.ua
9	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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe
2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe
2684	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe
2684	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 2776	2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe	32
PID 2488 wrote to memory of 2776	2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe	32
PID 2488 wrote to memory of 2776	2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe	32
PID 2488 wrote to memory of 2776	2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe	32
PID 2488 wrote to memory of 2684	2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe	33
PID 2488 wrote to memory of 2684	2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe	33
PID 2488 wrote to memory of 2684	2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe	33
PID 2488 wrote to memory of 2684	2488	20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe	33

C:\Users\Admin\AppData\Local\Temp\20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe
"C:\Users\Admin\AppData\Local\Temp\20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\4dda091d-ce62-4c1a-86b8-eb43ea5e1bf7" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:2776
- C:\Users\Admin\AppData\Local\Temp\20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe
  "C:\Users\Admin\AppData\Local\Temp\20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2684

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
42b845dd87594e1199076f0ee88ac6d8

SHA1
06b9235018f7f42f6da414e60c8475b951345080

SHA256
15cdfaf6d7b2faef912b7864e6662bbfbeda9d7bb317a955342e4ae9b1a9cea0

SHA512
8d2c98805af5844806436c84524bcd78747b02b3943d7fedb25d147d1c76b2f3dfad6af090909185eb774d07193ea912f0279c07c795aced9c6d998ca157fd17

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

Filesize
170B

MD5
6c4554ba95d84fb51d45e2ce1f89fad7

SHA1
e6050f8586cae474e00d5d40a67d765185f81412

SHA256
69e05b04080cded2295a907c42bdbcda4229e8787fc2cd9e36af10d71b6b44cf

SHA512
0c271296a90c56636a782fb57fee42015687f16d6a010ec748c8325a4a540df758838656c3aa8739db290a3ed01a0f6744e5a085b20249c9dd08373e3537c6e5

Download Submit
C:\Users\Admin\AppData\Local\4dda091d-ce62-4c1a-86b8-eb43ea5e1bf7\20240906bcf8e002b1b07307c4b4db8243ee854fstop.exe

Filesize
1.1MB

MD5
bcf8e002b1b07307c4b4db8243ee854f

SHA1
2513979c04b7ab3d3a77a29219a3219b1dec4949

SHA256
3fce9a2c37ee6008225bd0f8d10884612472e14c28ea492eb2042360ee47dea4

SHA512
d979566cd79529ae3a5667dab12cf3e94b1dc5e086b68407b9c2a474a67f4b95e5af54da8ef199bacb0cab2840b6c94c9025409cfcd004d61861b93f51452031

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab253C.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads