djvu | 3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1

Analysis

max time kernel
292s
max time network
242s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
08/08/2024, 22:34

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General

Target
3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Size 729KB
Sample240808-2hf7caverc
SHA256 3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1
MD5 d7528cd33b73718b5949277420681f90
SHA1 61d97f8da20ff2995890ce5f2c8a2c9e6e51c078
SHA512 b3dab709e19a2a8bad92b259ea1739ad55564f6fe31e9f4e502b6280ae6c70cdf5a0f1fda208887da4bbcf9213986e2038abe6a09dc2940998df08d82e87d474
SSDEEP 12288:koywWrwlTyC9yR+xBP4wMpAuhjH8/Hl19KKjNgzqE0CM6EpJMwk:PlTX9Xj4w+hbM1/g2kM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.watz
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
payload_url
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/abe121434ad837dd5bdd03878a14485820240531135509/34284d 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: 0874PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 13 IoCs

resource	yara_rule
behavioral1/memory/1232-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1232-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1232-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1232-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-62-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-63-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2516-64-0x0000000000400000-0x0000000000537000-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
2924	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-1-5-21-2257386474-3982792636-3902186748-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ff0ada2a-7c87-4640-9ad5-d06df64947d9\\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe\" --AutoStart"	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.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 1548 set thread context of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 2544 set thread context of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33

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 5 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	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
2516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
2516	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1548 wrote to memory of 1232	1548	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	30
PID 1232 wrote to memory of 2924	1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	31
PID 1232 wrote to memory of 2924	1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	31
PID 1232 wrote to memory of 2924	1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	31
PID 1232 wrote to memory of 2924	1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	31
PID 1232 wrote to memory of 2544	1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	32
PID 1232 wrote to memory of 2544	1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	32
PID 1232 wrote to memory of 2544	1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	32
PID 1232 wrote to memory of 2544	1232	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	32
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33
PID 2544 wrote to memory of 2516	2544	3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe	33

C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
"C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1548
- C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
  "C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1232
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ff0ada2a-7c87-4640-9ad5-d06df64947d9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2924
- - C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
    "C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2544
  - - C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
      "C:\Users\Admin\AppData\Local\Temp\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2516

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 1KB
SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
MD5 7fb5fa1534dcf77f2125b2403b30a0ee
SHA1 365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA512 a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Size 436B
SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
MD5 971c514f84bba0785f80aa1c23edfd79
SHA1 732acea710a87530c6b08ecdf32a110d254a54c8
SHA512 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58
MD5 SHA1 SHA512

Submit Download

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 174B
SHA256 03d97b5ea5c05314999c16bc6a61a72e2a8daf6d8a939240ccf6457afd7fb98e
MD5 8710d89bee374081274a157ca57b0ffe
SHA1 c60ebbd345ec1742df176905dc2399470da43f13
SHA512 9a7a1642fcbb3f5e06be36966425118347af80a10c10be93224cc99cc6d31aad1172e2750a860d2443915ebba151c8103e12c4197b6dbb65574e59f13bcf67c6
MD5 SHA1 SHA512

Submit Download

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 342B
SHA256 657bc2658117be4fb1c51ca138cc8ae544dcf70bb57113c40d942d74c7ecdd1b
MD5 c9a2ae3d9a86c4c871125da8e8b63566
SHA1 8ab688084b343bd693bcebe806e2f3c236b6c2c4
SHA512 a7697da2fd52133fb9295f42bb8c011186b2fe014cbeb86f8b5526aa2c07010f8e57f7773e19b637fe2754d31720d40f5a21b21e277a92741c27671a2b46b905
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Size 170B
SHA256 91c58648163b5c67a71a1804c4cbafac4c80674520b656f6699bfe284a6dd2a4
MD5 fc290d8dd2a73a0fa6f17087540de385
SHA1 466f627161bd3a4c2d4cd2bf95f4c13200969cf8
SHA512 485849160148e83c49b226ff891a550ca6fa31b4c314e6337c858787640887165993bf490d758e8a98b6cacd8a33eef283bff3d84390eafbdcd919d470fe2ed5
MD5 SHA1 SHA512

Submit Download

Cab532F.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab532F.tmp
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

Submit Download

3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe

Path C:\Users\Admin\AppData\Local\ff0ada2a-7c87-4640-9ad5-d06df64947d9\3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1.exe
Size 729KB
SHA256 3b8d07693e296aee36e7607c71503d981396a21b367e169146afdd052cdcf4d1
MD5 d7528cd33b73718b5949277420681f90
SHA1 61d97f8da20ff2995890ce5f2c8a2c9e6e51c078
SHA512 b3dab709e19a2a8bad92b259ea1739ad55564f6fe31e9f4e502b6280ae6c70cdf5a0f1fda208887da4bbcf9213986e2038abe6a09dc2940998df08d82e87d474
SSDEEP 12288:koywWrwlTyC9yR+xBP4wMpAuhjH8/Hl19KKjNgzqE0CM6EpJMwk:PlTX9Xj4w+hbM1/g2kM
MD5 SHA1 SHA512 SSDEEP

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memory/1232-8-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1232-7-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1232-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/1232-3-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1232-30-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/1548-5-0x00000000004D0000-0x00000000005EB000-memory.dmp

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memory/1548-4-0x0000000000220000-0x00000000002B2000-memory.dmp

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memory/1548-0-0x0000000000220000-0x00000000002B2000-memory.dmp

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memory/2516-38-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2516-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2516-56-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2516-55-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2516-54-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2516-62-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2516-63-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2516-60-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2516-64-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2544-37-0x0000000000400000-0x00000000004CA000-memory.dmp

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memory/2544-35-0x0000000000400000-0x00000000004CA000-memory.dmp

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memory/2544-31-0x00000000004D0000-0x0000000000562000-memory.dmp

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