djvu | d2c996657cc071187c1e84cd4720849addafb5f59a24d61b5ae49c646d0e748b

Analysis

max time kernel
142s
max time network
123s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
27-12-2024 01:25

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General

Target

F2D3.exe
Size

833KB
MD5

f48eb008b7dc078455742f66db4aa3c6
SHA1

9fa4e5e57e1845f8127bf8786567d52631a485d2
SHA256

57f531bb398323409f0e32d3d570eca0fc40c9aceda9baf4a6a0b92e02610f47
SHA512

7a5c575b4556ad0f9d845eafc14eb9d523b9ae98003948c4aa48f3eca0b110341fa14db573ea0f39e6269b13cfdb7871294d6d81a3409371441e1e4f997ff88a
SSDEEP

12288:wPb2JYkhvjPLBuCLgYWoQqMQTvU+w2ohi6927TNNlzgX8QjltSR4YgxQluu:wlSbLBucZ5nTMVX4hNZnQjAQyu

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://ugll.org/lancer/get.php

Attributes

extension
.errz
offline_id
e8w5MeiBrZVoHLoloPm9MNlKBzXH70BB3B2KQ7t1
payload_url
http://zerit.top/dl/build2.exe

http://ugll.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-2w6I3WpXEh 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: 0479JIjdm

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/2784-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2784-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2784-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2784-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-58-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-64-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-65-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-62-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2740-66-0x0000000000400000-0x0000000000537000-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
2840	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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c213e669-4d7c-4d12-9adf-80b3f9c8afb0\\F2D3.exe\" --AutoStart"	F2D3.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
9	api.2ip.ua
3	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1824 set thread context of 2784	1824	F2D3.exe	30
PID 1696 set thread context of 2740	1696	F2D3.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	F2D3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F2D3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F2D3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F2D3.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2784	F2D3.exe
2784	F2D3.exe
2740	F2D3.exe
2740	F2D3.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 1824 wrote to memory of 2784	1824	F2D3.exe	30
PID 2784 wrote to memory of 2840	2784	F2D3.exe	31
PID 2784 wrote to memory of 2840	2784	F2D3.exe	31
PID 2784 wrote to memory of 2840	2784	F2D3.exe	31
PID 2784 wrote to memory of 2840	2784	F2D3.exe	31
PID 2784 wrote to memory of 1696	2784	F2D3.exe	32
PID 2784 wrote to memory of 1696	2784	F2D3.exe	32
PID 2784 wrote to memory of 1696	2784	F2D3.exe	32
PID 2784 wrote to memory of 1696	2784	F2D3.exe	32
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33
PID 1696 wrote to memory of 2740	1696	F2D3.exe	33

C:\Users\Admin\AppData\Local\Temp\F2D3.exe
"C:\Users\Admin\AppData\Local\Temp\F2D3.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Users\Admin\AppData\Local\Temp\F2D3.exe
  "C:\Users\Admin\AppData\Local\Temp\F2D3.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2784
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c213e669-4d7c-4d12-9adf-80b3f9c8afb0" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2840
- - C:\Users\Admin\AppData\Local\Temp\F2D3.exe
    "C:\Users\Admin\AppData\Local\Temp\F2D3.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1696
  - - C:\Users\Admin\AppData\Local\Temp\F2D3.exe
      "C:\Users\Admin\AppData\Local\Temp\F2D3.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2740

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

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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
26da7a214863b19423e71c1e59243b61

SHA1
1a0c12b18735d586b5e75e0af2ddfbd668031f42

SHA256
d13b89960ec7b37cf50c493a3a0a5840cb685c660b7477299881123e97275d8b

SHA512
f54836368a881d584b4bbed31ae69729cfe7dfcc7f8b4e9cc20b72eedc041ea52cbd04f16cda07cd7b53d4eb82147bc8e01070fd2a62685f746fb5edb0cde8ac

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

Filesize
342B

MD5
35b970c5397d78da815bb1125b0510d4

SHA1
04d3bdf343cdf1dabe1dba9451bf428a9094d15b

SHA256
3fbeb60666cf5428c7f7c01a30fca3e7fae10fcd94e16e86bbca3eebd367cbdc

SHA512
c05e2acdc543ec16ca69f59a0c8b38c8ef45644f8e1c88a8e8fc8399390e40c4cc7bcc1738c73281b34416c79a4e47fc16ebcf2f2adf7bcfa3ed1a00cf87b0b7

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

Filesize
170B

MD5
7b1a3a7bd04cebb28f02a2ec6e92e6de

SHA1
679b46db76cd1e2ff478f1ac0dc47460415022fa

SHA256
1fa73c764e968a366f9c556cfe4913f49d51753fdedb35c618c0fd2cdd52d6cf

SHA512
f0956e05996f87a7f6d42b9c5c900b37e3385c068616e91114db56ba66a2ac518ebfe21253aada1ed4208df269a69ff2764212785963b74fd9f0982a8b7e098d

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab7E35.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\c213e669-4d7c-4d12-9adf-80b3f9c8afb0\F2D3.exe

Filesize
833KB

MD5
f48eb008b7dc078455742f66db4aa3c6

SHA1
9fa4e5e57e1845f8127bf8786567d52631a485d2

SHA256
57f531bb398323409f0e32d3d570eca0fc40c9aceda9baf4a6a0b92e02610f47

SHA512
7a5c575b4556ad0f9d845eafc14eb9d523b9ae98003948c4aa48f3eca0b110341fa14db573ea0f39e6269b13cfdb7871294d6d81a3409371441e1e4f997ff88a

Download Submit
memory/1696-32-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/1696-38-0x0000000000400000-0x0000000000511000-memory.dmp

Filesize
1.1MB

Download
memory/1696-33-0x0000000000400000-0x0000000000511000-memory.dmp

Filesize
1.1MB

Download
memory/1824-0-0x00000000002C0000-0x0000000000352000-memory.dmp

Filesize
584KB

Download
memory/1824-8-0x0000000001D70000-0x0000000001E8B000-memory.dmp

Filesize
1.1MB

Download
memory/1824-5-0x00000000002C0000-0x0000000000352000-memory.dmp

Filesize
584KB

Download
memory/1824-57-0x0000000001D70000-0x0000000001E8B000-memory.dmp

Filesize
1.1MB

Download
memory/1824-1-0x00000000002C0000-0x0000000000352000-memory.dmp

Filesize
584KB

Download
memory/2740-56-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-66-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-62-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-65-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-64-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-55-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-58-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2784-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2784-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2784-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2784-9-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2784-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download