djvu | f23c7c958001a1eb56b4f4fee91d024f22eed3a3fd88a59eefff09a677ad7478

Analysis

max time kernel
145s
max time network
125s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
07-09-2024 05:44

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General

Target

opgdt.exe
Size

736KB
MD5

664de3b2a24525498193312ba05bbd59
SHA1

6aec18d934495a68b8a3fbee3ac6e4d0a44f0400
SHA256

f23c7c958001a1eb56b4f4fee91d024f22eed3a3fd88a59eefff09a677ad7478
SHA512

2967289dc6eaa0673ee71718e3493cd36f4a27f9d1edbb68bf6d0cdc66c9373fea9b1bed1f1238013f064d4901666fb535deb84e541875a58d0cb07dd256177f
SSDEEP

12288:xIq8+GU7BALLZq4ah/h+c+s9k0vI50mJqLGiPMDoEA/7LCy2inm:xIqlhGFq4ahJ+cd9k0vI50mJiDYoJjLC

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://zexeq.com/raud/get.php

Attributes

extension
.coza
offline_id
O8Ao46dcCReRPC4I1PGMYsRFFc9WI5eOp0O3MFt1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.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. You can get and look video overview decrypt tool: https://we.tl/t-EPBZCVAS8s 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: 0693JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/3052-2-0x0000000002C30000-0x0000000002D4B000-memory.dmp	family_djvu
behavioral1/memory/2556-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2556-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2556-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2556-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-65-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-71-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-74-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-73-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2764-75-0x0000000000400000-0x0000000000537000-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
2904	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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ed49fdda-0188-42c1-b183-9610dbe6bb98\\opgdt.exe\" --AutoStart"	opgdt.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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3052 set thread context of 2556	3052	opgdt.exe	30
PID 2884 set thread context of 2764	2884	opgdt.exe	34

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	opgdt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	opgdt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	opgdt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	opgdt.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2556	opgdt.exe
2556	opgdt.exe
2764	opgdt.exe
2764	opgdt.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 3052 wrote to memory of 2556	3052	opgdt.exe	30
PID 2556 wrote to memory of 2904	2556	opgdt.exe	32
PID 2556 wrote to memory of 2904	2556	opgdt.exe	32
PID 2556 wrote to memory of 2904	2556	opgdt.exe	32
PID 2556 wrote to memory of 2904	2556	opgdt.exe	32
PID 2556 wrote to memory of 2884	2556	opgdt.exe	33
PID 2556 wrote to memory of 2884	2556	opgdt.exe	33
PID 2556 wrote to memory of 2884	2556	opgdt.exe	33
PID 2556 wrote to memory of 2884	2556	opgdt.exe	33
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34
PID 2884 wrote to memory of 2764	2884	opgdt.exe	34

C:\Users\Admin\AppData\Local\Temp\opgdt.exe
"C:\Users\Admin\AppData\Local\Temp\opgdt.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Users\Admin\AppData\Local\Temp\opgdt.exe
  "C:\Users\Admin\AppData\Local\Temp\opgdt.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2556
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ed49fdda-0188-42c1-b183-9610dbe6bb98" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2904
- - C:\Users\Admin\AppData\Local\Temp\opgdt.exe
    "C:\Users\Admin\AppData\Local\Temp\opgdt.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2884
  - - C:\Users\Admin\AppData\Local\Temp\opgdt.exe
      "C:\Users\Admin\AppData\Local\Temp\opgdt.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2764

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
476c243f9eafe7c7731ab005c73399f4

SHA1
407630cf5f9187f26c8f3185f7481f84e65504ac

SHA256
6c4dedc9e9429a94a1ca4b2ed5585f7adc4b8c0adb2b103195ea0a688d1a3d0e

SHA512
007ad26aaa01f9a507c310108fc95228cf1cf144af1ad7fcd2dcc283103535c884652ece18d33e78de1a03dd4f21444f824d0336cb2edb60698bfae72c19e7ad

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

Filesize
170B

MD5
a193f4aab283d89b7d296695941f6a1c

SHA1
e964a311f6e00ecdfee0bbe333fc8884ba54433c

SHA256
20e3c5ae166279b9a8d0d670fbda48df6da53d93abc692b31f5c5f2ed8047919

SHA512
a205a76d05d9c001d979fdbc48c570828e5c7d3eec349624ea8179197ff0f0a8125be4d4f772aa785cab1a1d74ae60c260a825cb2ef91133cc3f0555832a57fa

Download Submit
C:\Users\Admin\AppData\Local\7e72a362-0a30-414c-93ec-89c77d7c970b\build3.exe

Filesize
437B

MD5
6910426a598bc0b07dd6ca7c2faf5c22

SHA1
4304d65a08652b167453997e1464cc6ef034be23

SHA256
ebfef207462c29030b8a06068c8cbf1cfeae1304813b9cdbfa2d705b314bf692

SHA512
5e96757fa5daa336968aa07d5fe5525040a081a547dd6bad55bed4539ad76b3f96aabd38f461efdafa4a427963b2a3187cc40dfa60c74e6c6ddf738176381952

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabA860.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\bowsakkdestx.txt

Filesize
449B

MD5
caa078f0348cda98328127c142e3bfed

SHA1
e38274d642c806a3affcca8f7e37b61f591c47e6

SHA256
91faeb982f34313750a83d74c5464abe4e01357d1a7ea4253973509bc0e9d219

SHA512
2e6a5c482b5226079c6b4bd9a706537c372a3b43962f64be6bdd281e3217f963316ef0eba38164890bdf14af6558eb26605320487f0a0c841be9bb813c2ee5d6

Download Submit
C:\Users\Admin\AppData\Local\ed49fdda-0188-42c1-b183-9610dbe6bb98\opgdt.exe

Filesize
736KB

MD5
664de3b2a24525498193312ba05bbd59

SHA1
6aec18d934495a68b8a3fbee3ac6e4d0a44f0400

SHA256
f23c7c958001a1eb56b4f4fee91d024f22eed3a3fd88a59eefff09a677ad7478

SHA512
2967289dc6eaa0673ee71718e3493cd36f4a27f9d1edbb68bf6d0cdc66c9373fea9b1bed1f1238013f064d4901666fb535deb84e541875a58d0cb07dd256177f

Download Submit
memory/2556-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2556-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2556-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2556-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2556-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-75-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-71-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-73-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-74-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2764-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2884-28-0x0000000002C30000-0x0000000002CC2000-memory.dmp

Filesize
584KB

Download
memory/3052-0-0x0000000000360000-0x00000000003F2000-memory.dmp

Filesize
584KB

Download
memory/3052-1-0x0000000000360000-0x00000000003F2000-memory.dmp

Filesize
584KB

Download
memory/3052-2-0x0000000002C30000-0x0000000002D4B000-memory.dmp

Filesize
1.1MB

Download
memory/3052-6-0x0000000000360000-0x00000000003F2000-memory.dmp

Filesize
584KB

Download