djvu | 4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db

General

Target

4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
Size

826KB
MD5

e8dde310bdd80895f73f23c620adb2e4
SHA1

fcded1306311b5e218a965858bcd71c5d882530f
SHA256

4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db
SHA512

c5f6701b1217f74ea3df4ebe79754013fa0a9a88a1dcbd39a1ec591057c652113872ac60e7d0ec80b2da5609a1fcd8cc2038791393b19d3c8a510281fb97e1ca

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.wnlu
offline_id
gYuqQ5GsAaJom08TivUVhlPzZDKd916x4NcXrWt1
payload_url
http://kotob.top/dl/build2.exe

http://tzgl.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-m8LBBi8x8F 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: 0357Sigrj

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2268-119-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2268-120-0x0000000000424141-mapping.dmp	family_djvu
behavioral1/memory/3112-122-0x0000000002330000-0x000000000244B000-memory.dmp	family_djvu
behavioral1/memory/2268-123-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3444-128-0x0000000000424141-mapping.dmp	family_djvu
behavioral1/memory/3444-133-0x0000000000400000-0x0000000000537000-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

Processes:

icacls.exe

pid process

1140 icacls.exe

pid	process
1140	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\f566348d-d784-47de-a14f-a2a949675a89\\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe\" --AutoStart"	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.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.

Processes:

flow ioc

8 api.2ip.ua
9 api.2ip.ua
26 api.2ip.ua

flow	ioc
8	api.2ip.ua
9	api.2ip.ua
26	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

description	pid	process	target process
PID 3112 set thread context of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 set thread context of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

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

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

pid	process
2268	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
2268	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
3444	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
3444	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

C:\Users\Admin\AppData\Local\Temp\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
"C:\Users\Admin\AppData\Local\Temp\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3112
- C:\Users\Admin\AppData\Local\Temp\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
  "C:\Users\Admin\AppData\Local\Temp\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe"
  2⤵
  - Adds Run key to start application
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2268
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\f566348d-d784-47de-a14f-a2a949675a89" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:1140
- - C:\Users\Admin\AppData\Local\Temp\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
    "C:\Users\Admin\AppData\Local\Temp\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2424
  - - C:\Users\Admin\AppData\Local\Temp\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
      "C:\Users\Admin\AppData\Local\Temp\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3444

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

1

T1222

Install Root Certificate

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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

MD5
1c63500df0b57e29edd1a5867d9f0e9b

SHA1
0475a0611ac4d171e90b46303b96317fc186b15d

SHA256
c8f7c1bd12b80996707a806866379d91dc3008d5d2b0eeeb6d97d418aeeb7914

SHA512
29b914ffe63496d98e8ffb76afde49702888743c88bd0fc6aabdf3e8855e3a5389d933a29ccb4564e8d3198c159a1debfb56d6f39f428689f8eb4d497b341bde

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

MD5
65052acb8dc97b38007797064162c9a1

SHA1
862cf5f74d74b85103b088650a230ed0c6d32df3

SHA256
ef406913c83356f132bbc250646c24befee2acfdabbc9debcbca68c1da01a30f

SHA512
976f4bd21af190164d04534f4e534d44e14fd5d3c6798421f84ead4e0a53f25d386d4b59bfe0c7c5865af4f22593d975d6b48292b024a4b6ca0d65ff6ee735bd

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

MD5
629e9b83d26556c19f785fb0e4c076c3

SHA1
56585c31bcfbd0bf9878bab170350e7a55dbb2a5

SHA256
c0ab48781abe64afebc70cab38d2966726eca584d2925cf3bc0d113a4601f5bc

SHA512
9af499825ec65e05139c5349c03eec618413e414bd40a0d972709fac9d8396bac8c7a3fdc3ec6b117e525200ebbb102c83f23d070619d328fab5fd878e32bc3d

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

MD5
ca0c62f7ac0461c5cffa8ee6ebc6b457

SHA1
2d3af1d4699eb876f2e2266861600a311feff197

SHA256
c5ab106e84b832de1014acb32b22647e1f13290068dea668ccecd9382f290ee8

SHA512
1d57d165087ec51332f0c1021eb74e5756a1b688347ef0a9270a62d2289da2f3d51cb7f5c851fc21d4ebd0c8c1ea7fc959e96f3a7f95166dddd3f40ed06ff7dc

Download Submit
C:\Users\Admin\AppData\Local\f566348d-d784-47de-a14f-a2a949675a89\4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

MD5
e8dde310bdd80895f73f23c620adb2e4

SHA1
fcded1306311b5e218a965858bcd71c5d882530f

SHA256
4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db

SHA512
c5f6701b1217f74ea3df4ebe79754013fa0a9a88a1dcbd39a1ec591057c652113872ac60e7d0ec80b2da5609a1fcd8cc2038791393b19d3c8a510281fb97e1ca

Download Submit
memory/1140-121-0x0000000000000000-mapping.dmp

Download
memory/2268-123-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2268-120-0x0000000000424141-mapping.dmp

Download
memory/2268-119-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2424-125-0x0000000000000000-mapping.dmp

Download
memory/2424-126-0x000000000069F000-0x0000000000731000-memory.dmp

Filesize
584KB

Download
memory/3112-122-0x0000000002330000-0x000000000244B000-memory.dmp

Filesize
1.1MB

Download
memory/3112-118-0x0000000002293000-0x0000000002325000-memory.dmp

Filesize
584KB

Download
memory/3444-128-0x0000000000424141-mapping.dmp

Download
memory/3444-133-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

description	pid	process	target process
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 3112 wrote to memory of 2268	3112	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2268 wrote to memory of 1140	2268	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	icacls.exe
PID 2268 wrote to memory of 1140	2268	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	icacls.exe
PID 2268 wrote to memory of 1140	2268	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	icacls.exe
PID 2268 wrote to memory of 2424	2268	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2268 wrote to memory of 2424	2268	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2268 wrote to memory of 2424	2268	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe
PID 2424 wrote to memory of 3444	2424	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe	4b24e97671f1e07a832fbcc0d58b38a13a6e58624159565184d99ac6f19696db.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads