djvu | 2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d

Analysis

max time kernel
10s
max time network
49s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
02/08/2023, 19:24

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General

Target

2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe
Size

830KB
MD5

ca5f3e33f2550b666fb3c34919027b9e
SHA1

1b8742899a48664b6284d7795d2723e1c929833a
SHA256

2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d
SHA512

0e8edda52f7c140bf618b04e436157c2e185a31ac2463c7e39d618c93431c8e04eb288cd27fcb54e12cef6a7b0d2b5b98ce777e606207be0ede989f5d74138ae
SSDEEP

12288:SA5epLnKJR+qggvANtZ9S8ZbnJgQFyKJmwehCNcoFSxgSZUJVnVbltSOQ27:SA0DKH+qTvgtjyKMwehCN6DMnhaOH

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.pouu
offline_id
Cr1qw6x3Gr36kVHAZvrjTBFecy9ksVLEfrUGCjt1
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-MDnNtxiPM0 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: 0755JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/2252-135-0x0000000004280000-0x000000000439B000-memory.dmp	family_djvu
behavioral1/memory/692-136-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/692-137-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/692-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/692-139-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/692-148-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-153-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-154-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-156-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-157-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-162-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-163-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-167-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-169-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3880-170-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
4312	build2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3872	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-1-5-21-618519468-4027732583-1827558364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\1bee75b3-33ba-4948-b173-d83a3c7e3bd8\\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe\" --AutoStart"	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.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
26	api.2ip.ua
28	api.2ip.ua
42	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2252 set thread context of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2932 set thread context of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
692	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe
692	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe
3880	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe
3880	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 2252 wrote to memory of 692	2252	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	85
PID 692 wrote to memory of 3872	692	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	89
PID 692 wrote to memory of 3872	692	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	89
PID 692 wrote to memory of 3872	692	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	89
PID 692 wrote to memory of 2932	692	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	92
PID 692 wrote to memory of 2932	692	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	92
PID 692 wrote to memory of 2932	692	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	92
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 2932 wrote to memory of 3880	2932	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	95
PID 3880 wrote to memory of 4312	3880	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	98
PID 3880 wrote to memory of 4312	3880	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	98
PID 3880 wrote to memory of 4312	3880	2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe	98

C:\Users\Admin\AppData\Local\Temp\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe
"C:\Users\Admin\AppData\Local\Temp\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Users\Admin\AppData\Local\Temp\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe
  "C:\Users\Admin\AppData\Local\Temp\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:692
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\1bee75b3-33ba-4948-b173-d83a3c7e3bd8" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3872
- - C:\Users\Admin\AppData\Local\Temp\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe
    "C:\Users\Admin\AppData\Local\Temp\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2932
  - - C:\Users\Admin\AppData\Local\Temp\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe
      "C:\Users\Admin\AppData\Local\Temp\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:3880
    - - C:\Users\Admin\AppData\Local\9e7e0abe-3fa2-4aee-8a56-ad966048fe77\build2.exe
        
        "C:\Users\Admin\AppData\Local\9e7e0abe-3fa2-4aee-8a56-ad966048fe77\build2.exe"
        5⤵
        Executes dropped EXE
        
        PID:4312

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

Filesize
2KB

MD5
f15cc7f1027a56b71d5895c4897e916f

SHA1
0ebbf844932cb2d718ecf2a457694a6f83dd1dcc

SHA256
b658d543ca7a49216bc5d8a20c50855cbb72bb6d5c9d59067ca459eb5b726537

SHA512
c43a1089971458666265aeb229a932de5de10c6dc291067c5f705cf92de29bf5a83b1400364fef40f0866a47fe36c63e2a5415d55d6963ad41e51897252c8708

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

Filesize
1KB

MD5
2ac74d32fef934ceddc6a44b4ea0478b

SHA1
572ceb6de9d0b3e58aaa2903a56c4f4a2327a716

SHA256
64fedb27098214c70ac38a2cc7f226e8d4e3a7bf983de9040045625dc75ee424

SHA512
329c2251a90ee427d6fecb1a5740760cee28da2d5ad0cb10ef5dc2256e3af51443b7b482ce0c3ee8e253c48e29fb4b704082d8cde09fb4b1cf4382236920b9af

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D

Filesize
488B

MD5
3e9e0aaa38e406192095d370eed64f3f

SHA1
292fd13fea359ddeb7bfc1cc97e4c3be6fc0c016

SHA256
767971bc034e1cf13d9c5715438c502661c182d80b3495a7eed3e0bbe3c7349f

SHA512
4ac2924aa509702b46acb8bfdbdf690b2d3f3fffb3802338a02018f1b396ba4aed8798df862949a5ca23a5ca55681476590448fa6f8e2a1dd7f51add2bf33581

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E

Filesize
482B

MD5
c6a626d0a320a857d323a9dafa44bf43

SHA1
c0d33d5d8cd30f271043fa101e42ecc13d94f978

SHA256
ecf195791219c8afdc8f4aa5fd9e90f256b6fe47fd21f311f0f12f7307a87be9

SHA512
81babb743b85dd3d4d22f8b513bbce1dbd79060a03b61d1e558fd167d6d52db548f99e63d6416e6b7aa53e66acf053c533885485a88f6b69a2374b38b113b19f

Download Submit
C:\Users\Admin\AppData\Local\1bee75b3-33ba-4948-b173-d83a3c7e3bd8\2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d.exe

Filesize
830KB

MD5
ca5f3e33f2550b666fb3c34919027b9e

SHA1
1b8742899a48664b6284d7795d2723e1c929833a

SHA256
2c1f5a36acad54ed68f641c70b269dcb11b50844f3238c93c328b9992725787d

SHA512
0e8edda52f7c140bf618b04e436157c2e185a31ac2463c7e39d618c93431c8e04eb288cd27fcb54e12cef6a7b0d2b5b98ce777e606207be0ede989f5d74138ae

Download Submit
C:\Users\Admin\AppData\Local\9e7e0abe-3fa2-4aee-8a56-ad966048fe77\build2.exe

Filesize
449KB

MD5
304dcbfad357a684b36d2d639cdbc3eb

SHA1
428c58d8c86c49e28bc9958608817bf6a97dd780

SHA256
bd5aff6936d77e3deae4e45195b44ec5d4e7ba4f2a9dfe68ee7d6f7be2cfd97a

SHA512
8dd618a8a22c3e7f0f19287c6ca8135959f34f30a5d2e19f10f71c45a6b7c8c7dc0900b3e23c3ae479455cd1ce94a744c0841c26bde28f28ef8552130d465d43

Download Submit
C:\Users\Admin\AppData\Local\9e7e0abe-3fa2-4aee-8a56-ad966048fe77\build2.exe

Filesize
449KB

MD5
304dcbfad357a684b36d2d639cdbc3eb

SHA1
428c58d8c86c49e28bc9958608817bf6a97dd780

SHA256
bd5aff6936d77e3deae4e45195b44ec5d4e7ba4f2a9dfe68ee7d6f7be2cfd97a

SHA512
8dd618a8a22c3e7f0f19287c6ca8135959f34f30a5d2e19f10f71c45a6b7c8c7dc0900b3e23c3ae479455cd1ce94a744c0841c26bde28f28ef8552130d465d43

Download Submit
C:\Users\Admin\AppData\Local\9e7e0abe-3fa2-4aee-8a56-ad966048fe77\build2.exe

Filesize
449KB

MD5
304dcbfad357a684b36d2d639cdbc3eb

SHA1
428c58d8c86c49e28bc9958608817bf6a97dd780

SHA256
bd5aff6936d77e3deae4e45195b44ec5d4e7ba4f2a9dfe68ee7d6f7be2cfd97a

SHA512
8dd618a8a22c3e7f0f19287c6ca8135959f34f30a5d2e19f10f71c45a6b7c8c7dc0900b3e23c3ae479455cd1ce94a744c0841c26bde28f28ef8552130d465d43

Download Submit
memory/692-148-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/692-139-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/692-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/692-137-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/692-136-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2252-134-0x0000000002520000-0x00000000025B5000-memory.dmp

Filesize
596KB

Download
memory/2252-135-0x0000000004280000-0x000000000439B000-memory.dmp

Filesize
1.1MB

Download
memory/2932-151-0x0000000004010000-0x00000000040AE000-memory.dmp

Filesize
632KB

Download
memory/3880-157-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3880-162-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3880-163-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3880-167-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3880-169-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3880-170-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3880-156-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3880-154-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3880-153-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download