djvu | 0e06e9585cc9db33ee999ca4de668ab64ef6e9fa928ae6541b2f1ec68ff09da8

Analysis

max time kernel
143s
max time network
122s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
31-07-2024 10:59

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General

Target

4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Size

787KB
MD5

0b862b9c889d4bdc6f0bac7d702d8753
SHA1

fdc030df123e6e6a712cbc960a2e7c63266bf040
SHA256

4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7
SHA512

4f7284a625b4909f9a0d80023c1dbfe3ed2de8a14fdf9a5bd3687d7e2fb21e265ee6cca613e4e6c8cab35f806501b155e6ed70a11530eb1cc78dbc38b22d3e8b
SSDEEP

24576:reKt4RjnJ+wWEr55fRue+cfxiskJM0BPA:rORdGA55fkcJinM0BI

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://astdg.top/nddddhsspen6/get.php

Attributes

extension
.moqs
offline_id
CatwRkqdYh2Jomn6DqwFoGgcSbDsle1xlE1NPtt1
payload_url
http://securebiz.org/dl/build2.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral17/memory/2876-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2396-5-0x0000000002260000-0x000000000237B000-memory.dmp	family_djvu
behavioral17/memory/2876-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2876-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2876-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-50-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-59-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-60-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral17/memory/2436-61-0x0000000000400000-0x0000000000537000-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
2616	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-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fa0222c1-3c4c-42b3-a47a-34b8d1701bae\\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe\" --AutoStart"	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.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 2396 set thread context of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2648 set thread context of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.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	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
2436	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
2436	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2396 wrote to memory of 2876	2396	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	30
PID 2876 wrote to memory of 2616	2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	31
PID 2876 wrote to memory of 2616	2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	31
PID 2876 wrote to memory of 2616	2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	31
PID 2876 wrote to memory of 2616	2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	31
PID 2876 wrote to memory of 2648	2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	32
PID 2876 wrote to memory of 2648	2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	32
PID 2876 wrote to memory of 2648	2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	32
PID 2876 wrote to memory of 2648	2876	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	32
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33
PID 2648 wrote to memory of 2436	2648	4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe	33

C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
"C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2396
- C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
  "C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\fa0222c1-3c4c-42b3-a47a-34b8d1701bae" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2616
- - C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
    "C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2648
  - - C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe
      "C:\Users\Admin\AppData\Local\Temp\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2436

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
7fb5fa1534dcf77f2125b2403b30a0ee

SHA1
365d96812a69ac0a4611ea4b70a3f306576cc3ea

SHA256
33a39e9ec2133230533a686ec43760026e014a3828c703707acbc150fe40fd6f

SHA512
a9279fd60505a1bfeef6fb07834cad0fd5be02fd405573fc1a5f59b991e9f88f5e81c32fe910f69bdc6585e71f02559895149eaf49c25b8ff955459fd60c0d2e

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
70c3e0dde67b00db2cbd20ccedd34b32

SHA1
ff18cfdc0fcb12c2edc8a867ccadd4029fef2dc0

SHA256
1ba15820014dedd9806819e343ffb1bae08729dea3d7dad9d15a426d5d89e5a9

SHA512
19a6a6f4011712e549e7e690f81f4b1cbd95fc8f3e01ebbacc3f1f64bef243a3be236923d23ddcc75ed372a19bf2e8ed7e89dd9863156f5d8323d35fb0fe9554

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
342B

MD5
0425c17a1c16ba5f7ee1ecdfd1eff33e

SHA1
1e8edcd18b12bff1bdcbc97e48be66812034411d

SHA256
cb3cf175a2b17d00f1d65e6fd608a40b25f3c5e4fff5464a6cbc29b54042c8f1

SHA512
2734e834b9b6e4ecfc3475ca595be6b8ea2ecbc69534a036b8d1cf9a3049eccc06277923bda3fd8667cc4341e410c5e519fe98b0b20b0707c4bf7438be38eb78

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

Filesize
170B

MD5
c92f6d2453987d2951df55c5d415dcc7

SHA1
1d66d43da0772714a3a4940860ad57823005063d

SHA256
8e38ce72ed63721e6957238709c9b3c1d3c0537fee400a0487af7a7745d239af

SHA512
a3d820aea40234467bc64e8bb655aa9988dd9e47a16d4d7b30b3bb09422eb432e4769ecb56b2ab45dcf3f35d0df86d5acfcebf60b930f4da7fea90ebdbcec36a

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab865F.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\fa0222c1-3c4c-42b3-a47a-34b8d1701bae\4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7.exe

Filesize
787KB

MD5
0b862b9c889d4bdc6f0bac7d702d8753

SHA1
fdc030df123e6e6a712cbc960a2e7c63266bf040

SHA256
4bf2dace8a23551a3cd374a14b68cef6185aa18f9148dac8bf77f19f734d3ad7

SHA512
4f7284a625b4909f9a0d80023c1dbfe3ed2de8a14fdf9a5bd3687d7e2fb21e265ee6cca613e4e6c8cab35f806501b155e6ed70a11530eb1cc78dbc38b22d3e8b

Download Submit
memory/2396-0-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2396-54-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2396-6-0x0000000000340000-0x00000000003D2000-memory.dmp

Filesize
584KB

Download
memory/2396-5-0x0000000002260000-0x000000000237B000-memory.dmp

Filesize
1.1MB

Download
memory/2436-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2436-50-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2436-61-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2436-60-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2436-59-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2436-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2436-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2436-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2436-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2648-35-0x0000000000400000-0x000000000092E000-memory.dmp

Filesize
5.2MB

Download
memory/2648-28-0x0000000000930000-0x00000000009C2000-memory.dmp

Filesize
584KB

Download
memory/2648-36-0x0000000000400000-0x000000000092E000-memory.dmp

Filesize
5.2MB

Download
memory/2876-1-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2876-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2876-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2876-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2876-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download