djvu | 2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f

Resubmissions

21/09/2024, 16:40

240921-t6s7tasfpl10

21/09/2024, 16:37

240921-t46ecssfjj10

21/09/2024, 12:12

240921-pdcbda1fkd10

Analysis

max time kernel
143s
max time network
37s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/09/2024, 12:12

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General

Target
82C4.exe
Size 768KB
Sample240921-pdcbda1fkd
SHA256 2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f
MD5 663a7ee6f23102380056645ded592075
SHA1 42f7de8be635ed37f91c289a81e71bc67139adb9
SHA512 9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09
SSDEEP 12288:wyEfg9+yzz81R9K4UW/ug6nkYxMDoG8AGjn6PkRnTFXD1l9e8k7phRuHH8n4p:IQmQ43/rYE8vdnTFRU6H84
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

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

Attributes

extension
.nqsq
offline_id
OGykROpbgxJhrG1qc9yB9PwnsSv1Eo04vOCP0rt1
payload_url
http://znpst.top/dl/build2.exe

http://rlrz.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-O1iz3esfm2 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: 0337gSd743d

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

resource	yara_rule
behavioral1/memory/880-2-0x00000000006F0000-0x000000000080B000-memory.dmp	family_djvu
behavioral1/memory/2748-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-9-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2748-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-55-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-56-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-61-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-64-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-63-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2620-65-0x0000000000400000-0x0000000000537000-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

pid	Process
2660	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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c4fea8f4-246e-4efd-b432-b7a10253f1b9\\82C4.exe\" --AutoStart"	82C4.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
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 880 set thread context of 2748	880	82C4.exe	30
PID 2548 set thread context of 2620	2548	82C4.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	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	82C4.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2748	82C4.exe
2748	82C4.exe
2620	82C4.exe
2620	82C4.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 880 wrote to memory of 2748	880	82C4.exe	30
PID 2748 wrote to memory of 2660	2748	82C4.exe	31
PID 2748 wrote to memory of 2660	2748	82C4.exe	31
PID 2748 wrote to memory of 2660	2748	82C4.exe	31
PID 2748 wrote to memory of 2660	2748	82C4.exe	31
PID 2748 wrote to memory of 2548	2748	82C4.exe	32
PID 2748 wrote to memory of 2548	2748	82C4.exe	32
PID 2748 wrote to memory of 2548	2748	82C4.exe	32
PID 2748 wrote to memory of 2548	2748	82C4.exe	32
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33
PID 2548 wrote to memory of 2620	2548	82C4.exe	33

C:\Users\Admin\AppData\Local\Temp\82C4.exe
"C:\Users\Admin\AppData\Local\Temp\82C4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:880
- C:\Users\Admin\AppData\Local\Temp\82C4.exe
  "C:\Users\Admin\AppData\Local\Temp\82C4.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\c4fea8f4-246e-4efd-b432-b7a10253f1b9" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2660
- - C:\Users\Admin\AppData\Local\Temp\82C4.exe
    "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2548
  - - C:\Users\Admin\AppData\Local\Temp\82C4.exe
      "C:\Users\Admin\AppData\Local\Temp\82C4.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2620

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

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 1KB
SHA256 33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f
MD5 7fb5fa1534dcf77f2125b2403b30a0ee
SHA1 365d96812a69ac0a4611ea4b70a3f306576cc3ea
SHA512 a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8
Size 436B
SHA256 f157ed17fcaf8837fa82f8b69973848c9b10a02636848f995698212a08f31895
MD5 971c514f84bba0785f80aa1c23edfd79
SHA1 732acea710a87530c6b08ecdf32a110d254a54c8
SHA512 43dc1425d80e170c645a3e3bb56da8c3acd31bd637329e9e37094ac346ac85434df4edcdbefc05ae00aea33a80a88e2af695997a495611217fe6706075a63c58
MD5 SHA1 SHA512

Submit Download

8B2B9A00839EED1DFDCCC3BFC2F5DF12

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12
Size 174B
SHA256 bf6f6b4c8ae908d143a3dfb6fefeb08863d061fd5debef233a32c0e95a4ce5b6
MD5 14b4608ae7bd3280bdc4d2c4a62ebe87
SHA1 95a4922bf7ba0dcf74538a4f840f02f8859dc230
SHA512 01e018ad3e0a80446574df31e2f722279820037266a4bcdb3264f79c5a7775d1c44d98ba7285569fd84ecbd1ebee4e128fc3e675ab20242616e7bd4e485f52d6
MD5 SHA1 SHA512

Submit Download

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 342B
SHA256 f15d4649670854efb91ec8608fe31887635390e5b4ebdfd7e0ae47e45753227e
MD5 8e6b37c92ccaf72d4bd798cfbebed98f
SHA1 3e6415c71ff48e8e3ea7fb67154f5ffe67b2bd5d
SHA512 ece63ab5a57b4ce40aedc52e513a4c5019c27f085a37850581200720dd6947649ed9f9b0aadd540d875fd949803038b4f77b2552e3dab3040ec24989cbbfc8f7
MD5 SHA1 SHA512

Submit Download

B46811C17859FFB409CF0E904A4AA8F8

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8
Size 170B
SHA256 0cad3527a696984c484c1e3192aacbbf4fb341a382ddc865f09fd0ae092025e2
MD5 6255ab3b256b58e0caa9a360d635f1b2
SHA1 5d8e63abcc1f99cb5c7500d6255865f50660849f
SHA512 1237e432bc82c51283def9e1b9d2be75c995a48edb20fbebf5387422da487e82b2ead220f72249857099a138ac40501999e2fa8de7273d039a6d1dd98fa0e3b6
MD5 SHA1 SHA512

Submit Download

Cab6632.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab6632.tmp
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

Submit Download

82C4.exe

Path C:\Users\Admin\AppData\Local\c4fea8f4-246e-4efd-b432-b7a10253f1b9\82C4.exe
Size 768KB
SHA256 2f9c6d06d25dfea43bb52e9b81df3dd3ebdef5d066573494598e77c450937e8f
MD5 663a7ee6f23102380056645ded592075
SHA1 42f7de8be635ed37f91c289a81e71bc67139adb9
SHA512 9d4e890505ccda9a0b3cd971598153c1e33be481d10c1133851f621fc4aad148554977b3162d36cb97759fde5603cfebf7876ad39199eee0519ecd3b1f857d09
SSDEEP 12288:wyEfg9+yzz81R9K4UW/ug6nkYxMDoG8AGjn6PkRnTFXD1l9e8k7phRuHH8n4p:IQmQ43/rYE8vdnTFRU6H84
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/880-7-0x00000000002E0000-0x0000000000372000-memory.dmp

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memory/880-0-0x00000000002E0000-0x0000000000372000-memory.dmp

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memory/880-2-0x00000000006F0000-0x000000000080B000-memory.dmp

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memory/880-1-0x00000000002E0000-0x0000000000372000-memory.dmp

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memory/2548-31-0x0000000000220000-0x00000000002B2000-memory.dmp

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memory/2548-33-0x0000000000400000-0x0000000000532000-memory.dmp

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memory/2548-38-0x0000000000400000-0x0000000000532000-memory.dmp

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memory/2620-55-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-59-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-39-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-65-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-40-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-63-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-64-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-61-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-56-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2620-57-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2748-9-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2748-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2748-5-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2748-8-0x0000000000400000-0x0000000000537000-memory.dmp

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memory/2748-32-0x0000000000400000-0x0000000000537000-memory.dmp

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