djvu | 3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71

Analysis

max time kernel
146s
max time network
127s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
01-01-2025 21:02

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General

Target

3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
Size

810KB
MD5

42fe928b06e704ec51f6d9e679a4b2e4
SHA1

f0fb600a2b9428b2dd33fd8a7d781f4f59423241
SHA256

3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71
SHA512

4ad727be5cc71cbcc33eaf0015e51370575137e74d460b65a2c5fa6abe7e153ce981ff3adb2937e1711d2b9a462db2b1e3cd353e971881bd5fded340f5e5075e
SSDEEP

12288:x/4LAaAmpqSAQjWW6OCEVRxpHsSCfCP31pQlGYtQAN3WdYB89XoU2VwwZGEX8cAF:BpaYW5fRxpHs743vQ0xAnB8992VVsEv

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.irjg
offline_id
xcdIdDNFh62dy3iJsba1COhcfDENsbjPHQQ2Eht1
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-xl2bbDnZSN 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: 0338gSd743d

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/3016-2-0x0000000004860000-0x000000000497B000-memory.dmp	family_djvu
behavioral1/memory/1868-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1868-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1868-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/1868-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2124-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2744	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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7180091c-4289-422e-ac0b-1948d59d845c\\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe\" --AutoStart"	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.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 3016 set thread context of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 2856 set thread context of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.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	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
2124	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
2124	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 3016 wrote to memory of 1868	3016	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	30
PID 1868 wrote to memory of 2744	1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	32
PID 1868 wrote to memory of 2744	1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	32
PID 1868 wrote to memory of 2744	1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	32
PID 1868 wrote to memory of 2744	1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	32
PID 1868 wrote to memory of 2856	1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	33
PID 1868 wrote to memory of 2856	1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	33
PID 1868 wrote to memory of 2856	1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	33
PID 1868 wrote to memory of 2856	1868	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	33
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34
PID 2856 wrote to memory of 2124	2856	3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe	34

C:\Users\Admin\AppData\Local\Temp\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
"C:\Users\Admin\AppData\Local\Temp\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Users\Admin\AppData\Local\Temp\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
  "C:\Users\Admin\AppData\Local\Temp\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1868
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\7180091c-4289-422e-ac0b-1948d59d845c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2744
- - C:\Users\Admin\AppData\Local\Temp\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
    "C:\Users\Admin\AppData\Local\Temp\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2856
  - - C:\Users\Admin\AppData\Local\Temp\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe
      "C:\Users\Admin\AppData\Local\Temp\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2124

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
67e486b2f148a3fca863728242b6273e

SHA1
452a84c183d7ea5b7c015b597e94af8eef66d44a

SHA256
facaf1c3a4bf232abce19a2d534e495b0d3adc7dbe3797d336249aa6f70adcfb

SHA512
d3a37da3bb10a9736dc03e8b2b49baceef5d73c026e2077b8ebc1b786f2c9b2f807e0aa13a5866cf3b3cafd2bc506242ef139c423eaffb050bbb87773e53881e

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
4c858c1a60ac3abf97cae9bdd2656175

SHA1
c2b1ed7bbc1745ca6d5924228d142928b87d8910

SHA256
928cac21791d98c45e25a1fa103a202b2dcd800223dc9c2ffc79d6c4b0e759e3

SHA512
a4eb43a3557983623f850c8781be27b09d71596d4382b38bae645f24ac914ca3f0739798318da88390f15ac25ded6a6f173588bbba4bfcf19e761e11c657a7e6

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

Filesize
170B

MD5
154b499ab477190fba1faa2bed59d915

SHA1
7e39273c61488fb29fc9affd8a96edd6ee7ad9c1

SHA256
b7cd9590a5241e48d100907fca1c5b7925a1b9ff46c017d805d38f740477bd45

SHA512
b56821a7692c3eeec4ab2ed81fb0e3b2c09346e793eb8bed5c024e87c4c9f95d9dcc869586e44ee19faa6867a050048d33766d468e6618068a4cdbb6470b45f9

Download Submit
C:\Users\Admin\AppData\Local\7180091c-4289-422e-ac0b-1948d59d845c\3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71.exe

Filesize
810KB

MD5
42fe928b06e704ec51f6d9e679a4b2e4

SHA1
f0fb600a2b9428b2dd33fd8a7d781f4f59423241

SHA256
3f1596b4ebd177ec46e57ea0e6d208f32c1ebb93b448a4b5318cc116293d1e71

SHA512
4ad727be5cc71cbcc33eaf0015e51370575137e74d460b65a2c5fa6abe7e153ce981ff3adb2937e1711d2b9a462db2b1e3cd353e971881bd5fded340f5e5075e

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabCD0F.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/1868-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1868-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1868-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1868-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1868-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2124-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2856-28-0x0000000002FA0000-0x0000000003031000-memory.dmp

Filesize
580KB

Download
memory/3016-0-0x0000000000340000-0x00000000003D1000-memory.dmp

Filesize
580KB

Download
memory/3016-7-0x0000000000340000-0x00000000003D1000-memory.dmp

Filesize
580KB

Download
memory/3016-1-0x0000000000340000-0x00000000003D1000-memory.dmp

Filesize
580KB

Download
memory/3016-2-0x0000000004860000-0x000000000497B000-memory.dmp

Filesize
1.1MB

Download