djvu | 38bc13ef112b2f17d4d1a80243fac6a521b5d58228984aae0752d79487fa3b66

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14-12-2024 07:51

241214-jqcj1sxnhr 10

11-12-2024 15:39

241211-s3498stkar 10

07-12-2024 20:12

241207-yy4qsswqej 10

Analysis

max time kernel
142s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2024 15:15

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General

Target

c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
Size

983KB
MD5

e15e3cfa542459e8d87e8bfdf70a38a1
SHA1

1c98fbf7b780fc8ab7f73d468ab77b41570c9665
SHA256

c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286
SHA512

fd55639cc4f757f90a01236b10bf33bd678ef7a141c6538a5285133aa8d610bb0bf287043717557a26d28a924f3c44fbf37c13421f27a389f2e8fc76ce4b91fe
SSDEEP

24576:Fp90jN2CdssXMZ/ggHEfsLJ4qFKqyqG5nFYR1t:N0NDdssygGl94qFKqyqYa

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://dell1.ug/hosuhf37t5iqy3guygg6w4guiner/37tiuywgw/get.php

Attributes

extension
.meds
offline_id
Pq9d1D32xIxjAlRK7OkLl3utdbWN8syVVEm35xt1
payload_url
http://dell1.ug/files/cost/updatewin1.exe

http://dell1.ug/files/cost/updatewin2.exe

http://dell1.ug/files/cost/updatewin.exe

http://dell1.ug/files/cost/3.exe

http://dell1.ug/files/cost/4.exe

http://dell1.ug/files/cost/5.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like photos, 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-ZFjRnJfc9f 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: 162Ad768734uygjdfg

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral22/memory/3828-2-0x0000000002440000-0x000000000255A000-memory.dmp	family_djvu
behavioral22/memory/3828-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral22/memory/2156-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral22/memory/2156-18-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral22/memory/3828-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral22/memory/3828-26-0x0000000002440000-0x000000000255A000-memory.dmp	family_djvu
behavioral22/memory/2156-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral22/memory/2156-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral22/memory/2156-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3940	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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\217d4bbd-a617-4f6c-8cec-5dfb6c6e1b3c\\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe\" --AutoStart"	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.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
3	api.2ip.ua
4	api.2ip.ua
21	api.2ip.ua

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
680	3828	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 3 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	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3828	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
3828	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
2156	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
2156	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3828 wrote to memory of 3940	3828	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	83
PID 3828 wrote to memory of 3940	3828	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	83
PID 3828 wrote to memory of 3940	3828	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	83
PID 3828 wrote to memory of 2156	3828	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	84
PID 3828 wrote to memory of 2156	3828	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	84
PID 3828 wrote to memory of 2156	3828	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	84

C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
"C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3828
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\217d4bbd-a617-4f6c-8cec-5dfb6c6e1b3c" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:3940
- C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
  "C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe" --Admin IsNotAutoStart IsNotTask
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2156
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3828 -s 2136
  2⤵
  - Program crash
  PID:680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3828 -ip 3828
1⤵
PID:3688

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

Query Registry

T1012

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
3cf4b5d3994679381daf7e46e5c29ff2

SHA1
cb71dffe3ceb388ca65cb35681420bd35bb8058d

SHA256
9d5bf9ddf002e55167eb14056808f63350de157a7e7f53126e2ddf704186e7a0

SHA512
4ee00a0a0103ffb0f19fd87c1fe57eb6fbef8d39889fcd16296ff79e2cc514c7122c76b5e8b2557dbb2d9a256924bace32853cdb0dc7cacab373e6913a3ad2a9

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

Filesize
170B

MD5
f34e64abb1881d762c0fa417ef9be6f3

SHA1
2abde0f4e87a438b0bb79939429a584239a42ff2

SHA256
9f5a9a3079cd93a3f0c5ebffbf5975aa45334c4a5fd37262a5bde67adfdcd9f9

SHA512
d5b6f3562de6177312fdec90c8cf7a8fcbe625c4532412139a38b1f53dd68e68f05e61d51d20c5939549022e7f09d4479a7a1ddeef1b6380a3fbd99cf74aae2e

Download Submit
C:\Users\Admin\AppData\Local\217d4bbd-a617-4f6c-8cec-5dfb6c6e1b3c\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Filesize
983KB

MD5
e15e3cfa542459e8d87e8bfdf70a38a1

SHA1
1c98fbf7b780fc8ab7f73d468ab77b41570c9665

SHA256
c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286

SHA512
fd55639cc4f757f90a01236b10bf33bd678ef7a141c6538a5285133aa8d610bb0bf287043717557a26d28a924f3c44fbf37c13421f27a389f2e8fc76ce4b91fe

Download Submit
memory/2156-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2156-18-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2156-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2156-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2156-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3828-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3828-2-0x0000000002440000-0x000000000255A000-memory.dmp

Filesize
1.1MB

Download
memory/3828-1-0x0000000002360000-0x0000000002433000-memory.dmp

Filesize
844KB

Download
memory/3828-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3828-26-0x0000000002440000-0x000000000255A000-memory.dmp

Filesize
1.1MB

Download