djvu | f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe

Analysis

max time kernel
149s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
25/04/2024, 02:11

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General

Target

f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
Size

763KB
MD5

e9ff14a975f084f01373d468c0b91a16
SHA1

302d4b9f88ae7b085b56661774d6805156039924
SHA256

f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe
SHA512

4c7965f1f1a123b57ab9ca49cd4b3db35c9d98086eec4cdd297b9b706d68dac25183d052934f564f935459c49471c953453202a99b8f0d62e03b0626d8c41ce0
SSDEEP

12288:M2dc5bz6tqdDlvGkNwikL95whi6SY7Mf6cMFqNjOjNiaUORnV77J1BDg:uWqdBpNwJLsi6v7iMpxDV77J3s

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test2/get.php

Attributes

extension
.bgzq
offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.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. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/54cdfd152fe98eedb628a1f4ddb7076420240421150208/403a27 Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. 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: 0864PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/2832-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2440-2-0x00000000058E0000-0x00000000059FB000-memory.dmp	family_djvu
behavioral1/memory/2832-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2548-58-0x0000000000400000-0x0000000000537000-memory.dmp	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
2520	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-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ea87a625-a34b-4d46-8eef-56b12b1fd00f\\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe\" --AutoStart"	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.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
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2440 set thread context of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2368 set thread context of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
2548	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
2548	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2440 wrote to memory of 2832	2440	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	28
PID 2832 wrote to memory of 2520	2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	29
PID 2832 wrote to memory of 2520	2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	29
PID 2832 wrote to memory of 2520	2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	29
PID 2832 wrote to memory of 2520	2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	29
PID 2832 wrote to memory of 2368	2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	30
PID 2832 wrote to memory of 2368	2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	30
PID 2832 wrote to memory of 2368	2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	30
PID 2832 wrote to memory of 2368	2832	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	30
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31
PID 2368 wrote to memory of 2548	2368	f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe	31

C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
"C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
  "C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ea87a625-a34b-4d46-8eef-56b12b1fd00f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2520
- - C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
    "C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2368
  - - C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
      "C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
f8ed6292d6d2f9514668acec50849d17

SHA1
482745d97c48b32fd986e488d169ac4eb7edd737

SHA256
a7760866eaf849b079815652f9dce9eb9ec7c599199bc65c7030ca9e2ed91c26

SHA512
ebc265c4a27c4a1d14ef783b28f3cb0de9ca4f28795078c3d80bf2ec6574c4e8f3f3c7c68197b1ea6f037cb88268cfab99817660f442696167120bc6275cad4f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
88f03d7578a86e977069eb1b92dc9d88

SHA1
ba627b198e624dfc3612352c80dbdddf01285487

SHA256
3ff8e96fab32c96db1eef0cefc4145b8e74e44763f291fa5d7e870f794f4f4bb

SHA512
a61174a69be20819e837724468ce1298531f6d78cb049e250fa3d9f296d7b5526908d97ac58e8e3310418e1692cc0a74b9f5749c8587d37b813d8cdb4cd469f6

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

Filesize
344B

MD5
2a262e58cc850fa55f2eac851b97fd07

SHA1
65a62f5b13dc33c88c9c50edeeecac89c4cec2b9

SHA256
a0e05da6710933f582156732661a4823e5f37ae8189728f53c121bd507a381d3

SHA512
9a231fe2ad9fffbcb5b8fbea600745becd672774c1e1a357447a55da07efdcd655321c2f2b44bc887bb41aa3e711d370a15464f34f572e39be7db60e7ce3df71

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
51a0d85701dd8e73252a73ac51cb6a13

SHA1
fc668272e8ebc470e53af2385978f4442ae797ce

SHA256
db0a2d1dc737e96ca27dfeb620ab0d3bb2adb300432e09503ee890ce7fd81ee7

SHA512
94ee9e5481a02eb0ae27ff6f26b067038da32835369d39e0580e67c06c0b289e8309edf5eb16a437906832cdd0f69b681281994367c82e8f14953fc416c45ac6

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabBA79.tmp

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\ea87a625-a34b-4d46-8eef-56b12b1fd00f\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe

Filesize
763KB

MD5
e9ff14a975f084f01373d468c0b91a16

SHA1
302d4b9f88ae7b085b56661774d6805156039924

SHA256
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe

SHA512
4c7965f1f1a123b57ab9ca49cd4b3db35c9d98086eec4cdd297b9b706d68dac25183d052934f564f935459c49471c953453202a99b8f0d62e03b0626d8c41ce0

Download Submit
memory/2368-34-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2368-27-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2368-29-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2440-2-0x00000000058E0000-0x00000000059FB000-memory.dmp

Filesize
1.1MB

Download
memory/2440-1-0x0000000004120000-0x00000000041B2000-memory.dmp

Filesize
584KB

Download
memory/2440-0-0x0000000004120000-0x00000000041B2000-memory.dmp

Filesize
584KB

Download
memory/2548-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2548-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2548-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2548-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2548-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2548-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2548-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2548-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2548-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download