djvu | 2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

Resubmissions

21-09-2024 16:40

240921-t6s7tasfpl 10

21-09-2024 16:37

240921-t46ecssfjj 10

21-09-2024 12:12

240921-pdcbda1fkd 10

Analysis

max time kernel
294s
max time network
245s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
21-09-2024 16:40

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General

Target

82C4.exe
Size

768KB
MD5

663a7ee6f23102380056645ded592075
SHA1

42f7de8be635ed37f91c289a81e71bc67139adb9
SHA256

2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f
SHA512

9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09
SSDEEP

12288:wyEfg9+yzz81R9K4UW/ug6nkYxMDoG8AGjn6PkRnTFXD1l9e8k7phRuHH8n4p:IQmQ43/rYE8vdnTFRU6H84

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.nqsq
offline_id
OGykROpbgxJhrG1qc9yB9PwnsSv1Eo04vOCP0rt1
payload_url
http://znpst.top/dl/build2.exe

http://rlrz.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-O1iz3esfm2 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: 0337gSd743d

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/2308-2-0x0000000000540000-0x000000000065B000-memory.dmp	family_djvu
behavioral1/memory/1796-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1796-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1796-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1796-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-61-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-63-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-64-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2736-65-0x0000000000400000-0x0000000000537000-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
2808	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\\6f5fe66e-a01c-4e88-88ee-8e15e2556ddb\\82C4.exe\" --AutoStart"	82C4.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 2308 set thread context of 1796	2308	82C4.exe	30
PID 3020 set thread context of 2736	3020	82C4.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	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1796	82C4.exe
1796	82C4.exe
2736	82C4.exe
2736	82C4.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 2308 wrote to memory of 1796	2308	82C4.exe	30
PID 1796 wrote to memory of 2808	1796	82C4.exe	31
PID 1796 wrote to memory of 2808	1796	82C4.exe	31
PID 1796 wrote to memory of 2808	1796	82C4.exe	31
PID 1796 wrote to memory of 2808	1796	82C4.exe	31
PID 1796 wrote to memory of 3020	1796	82C4.exe	32
PID 1796 wrote to memory of 3020	1796	82C4.exe	32
PID 1796 wrote to memory of 3020	1796	82C4.exe	32
PID 1796 wrote to memory of 3020	1796	82C4.exe	32
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33
PID 3020 wrote to memory of 2736	3020	82C4.exe	33

C:\Users\Admin\AppData\Local\Temp\82C4.exe
"C:\Users\Admin\AppData\Local\Temp\82C4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2308
- C:\Users\Admin\AppData\Local\Temp\82C4.exe
  "C:\Users\Admin\AppData\Local\Temp\82C4.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1796
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\6f5fe66e-a01c-4e88-88ee-8e15e2556ddb" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2808
- - C:\Users\Admin\AppData\Local\Temp\82C4.exe
    "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3020
  - - C:\Users\Admin\AppData\Local\Temp\82C4.exe
      "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2736

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

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
d10ba14bd155960bf5fabfb717a5f9ff

SHA1
da0c24f21f22a6f4525cdc45a95ef68aff80c78f

SHA256
5c7c3a9b0e0b00d5402759b0a82410a05b21d64235bef076458009e9454e5156

SHA512
64c6cb2a2f776aa90fab32be024ffbd04cea1148e05648adeeb6f958e9dc00447375187bc41b615f15b896e69e2dbc58f25847ec55cc2e1f4c00520bf1e1ab8b

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

Filesize
342B

MD5
85d14fc802a17d1707ffcd735c475bf3

SHA1
8b140aff995fab7a62c85dabcc71eaab30707c44

SHA256
c0a156e74e388128a1306ce203eab51607f8c6094e11add221df548bcf50b9d2

SHA512
0afa2828555485420f30059487063def761ff92bec7d7379076f0ad9d1a07ad67c6b31dde261c2c4b2cbac76b13305952f4fe3fa66bd8d4ba3e2c0673d236ab6

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

Filesize
170B

MD5
87259f75153a1a840d1c50a6058ad343

SHA1
c92bbe5923b7d7885835a5073c90cceb68088142

SHA256
69946c642bfa4cfe7076b6ad0e2fa331713cad7365649c161c497879d95d6665

SHA512
2ee62bd56ac4dc7785cce91e904ee5c852e41e913688faa168f5c197df80a1dcc867abb83b74fc758061fc3bd6db17809ee8e3f64acc6b9e2327541e23e30fcd

Download Submit
C:\Users\Admin\AppData\Local\6f5fe66e-a01c-4e88-88ee-8e15e2556ddb\82C4.exe

Filesize
768KB

MD5
663a7ee6f23102380056645ded592075

SHA1
42f7de8be635ed37f91c289a81e71bc67139adb9

SHA256
2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

SHA512
9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabB8C4.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/1796-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1796-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1796-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1796-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1796-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2308-0-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2308-7-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2308-2-0x0000000000540000-0x000000000065B000-memory.dmp

Filesize
1.1MB

Download
memory/2308-1-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2736-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-63-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-64-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2736-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3020-38-0x0000000000400000-0x0000000000532000-memory.dmp

Filesize
1.2MB

Download
memory/3020-33-0x0000000000400000-0x0000000000532000-memory.dmp

Filesize
1.2MB

Download
memory/3020-32-0x00000000002C0000-0x0000000000352000-memory.dmp

Filesize
584KB

Download