djvu | 38bc13ef112b2f17d4d1a80243fac6a521b5d58228984aae0752d79487fa3b66

Resubmissions

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
145s
max time network
129s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 8 IoCs

resource	yara_rule
behavioral21/memory/2520-2-0x0000000001E70000-0x0000000001F8A000-memory.dmp	family_djvu
behavioral21/memory/2520-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/2520-22-0x0000000001E70000-0x0000000001F8A000-memory.dmp	family_djvu
behavioral21/memory/2520-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/3020-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/3020-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/3020-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral21/memory/3020-45-0x0000000000400000-0x0000000000537000-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
2860	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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\5eefc6f3-a272-4ed9-b5a3-5c4e8846cc65\\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
4	api.2ip.ua
5	api.2ip.ua
9	api.2ip.ua

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 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	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
3020	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
3020	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2860	2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	31
PID 2520 wrote to memory of 2860	2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	31
PID 2520 wrote to memory of 2860	2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	31
PID 2520 wrote to memory of 2860	2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	31
PID 2520 wrote to memory of 3020	2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	32
PID 2520 wrote to memory of 3020	2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	32
PID 2520 wrote to memory of 3020	2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	32
PID 2520 wrote to memory of 3020	2520	c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe	32

C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe
"C:\Users\Admin\AppData\Local\Temp\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Windows\SysWOW64\icacls.exe
  icacls "C:\Users\Admin\AppData\Local\5eefc6f3-a272-4ed9-b5a3-5c4e8846cc65" /deny *S-1-1-0:(OI)(CI)(DE,DC)
  2⤵
  - Modifies file permissions
  - System Location Discovery: System Language Discovery
  PID:2860
- 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:3020

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
147eec3d9468b3e2d750a03ca975f471

SHA1
d7f0b604c212e21cd0f1fbfad8f48906e68664d2

SHA256
7adc4548b3daa673f0f12b731dbd1fa39d730abccf905b1baed0ee666020b524

SHA512
01604a71c2f4ea47a41dfd1d67bb0a24c8c5fcfa57733fd5fcd440976da9d9cd9080e4f48b439d6a008c3dda9abdebdf5c085d07ded8559c1f15d8467e528674

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

Filesize
170B

MD5
c459590ef39d1b1cfaa9b7152301994a

SHA1
4cfa6f069b008d78c5a9f619dd38f273d2660c4d

SHA256
89cac6b71a837e2ebb7c5642e34f3570761f7a7c241cdafa3dbac68006d3dc8b

SHA512
63736b86d10566b26f2a7046ebf1aed7b53b799bb41862742b95771b5fb7783e3c218529db697d7e2ad20cf1b1b3933e55f7e7cce6017477a95bdd8ef5f45132

Download Submit
C:\Users\Admin\AppData\Local\5eefc6f3-a272-4ed9-b5a3-5c4e8846cc65\c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286.exe

Filesize
983KB

MD5
e15e3cfa542459e8d87e8bfdf70a38a1

SHA1
1c98fbf7b780fc8ab7f73d468ab77b41570c9665

SHA256
c2716fcc735a4f1b9fce29cb1dc20a26969b71f615e2b119e9680f015379d286

SHA512
fd55639cc4f757f90a01236b10bf33bd678ef7a141c6538a5285133aa8d610bb0bf287043717557a26d28a924f3c44fbf37c13421f27a389f2e8fc76ce4b91fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab9BB3.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/2520-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2520-23-0x0000000001DA0000-0x0000000001E65000-memory.dmp

Filesize
788KB

Download
memory/2520-1-0x0000000001DA0000-0x0000000001E65000-memory.dmp

Filesize
788KB

Download
memory/2520-22-0x0000000001E70000-0x0000000001F8A000-memory.dmp

Filesize
1.1MB

Download
memory/2520-0-0x0000000001DA0000-0x0000000001E65000-memory.dmp

Filesize
788KB

Download
memory/2520-2-0x0000000001E70000-0x0000000001F8A000-memory.dmp

Filesize
1.1MB

Download
memory/2520-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3020-25-0x0000000000540000-0x0000000000605000-memory.dmp

Filesize
788KB

Download
memory/3020-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3020-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3020-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3020-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download