djvu | de911ac34eaf245b021db66b7ccf13af0f1f83de17caa33829adcbd7eeb7fc45

General

Target

7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
Size

784KB
MD5

459803ec0adf835b5e93883d886fb100
SHA1

962df93776acb813318c02293efc35d8aa5904c1
SHA256

7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2
SHA512

c40ed8612973451546511558be95d8055b6a0e5ccdaee5b971abc1cd64bc50b036b1fc80e0101a198e42cf0fded9e007b5e062faf5a1cffddde068c9deeb0aa5
SSDEEP

24576:GXuzmfOT3AvW7SokR7jKBiPNFsjdqGKp8/kI:A6wYSokR7GBiPNErKP

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://fuyt.org/test1/get.php

Attributes

extension
.ghas
offline_id
miqhSGmGE63yWs53FTz0fnp8eCARpnaYE3O3p2t1
payload_url
http://zerit.top/dl/build2.exe

http://fuyt.org/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 18 IoCs

resource	yara_rule
behavioral2/memory/4712-2-0x0000000002300000-0x000000000241B000-memory.dmp	family_djvu
behavioral2/memory/1892-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1892-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1892-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1892-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1892-17-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-30-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-31-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-44-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-48-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1436-49-0x0000000000400000-0x0000000000537000-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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2292	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-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4a0bb48e-4ad0-444f-8104-9fcf63eb5ee4\\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe\" --AutoStart"	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.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
20	api.2ip.ua
5	api.2ip.ua
6	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4712 set thread context of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 1680 set thread context of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87

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	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1892	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
1892	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
1436	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
1436	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 4712 wrote to memory of 1892	4712	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	83
PID 1892 wrote to memory of 2292	1892	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	84
PID 1892 wrote to memory of 2292	1892	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	84
PID 1892 wrote to memory of 2292	1892	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	84
PID 1892 wrote to memory of 1680	1892	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	85
PID 1892 wrote to memory of 1680	1892	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	85
PID 1892 wrote to memory of 1680	1892	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	85
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87
PID 1680 wrote to memory of 1436	1680	7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe	87

C:\Users\Admin\AppData\Local\Temp\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
"C:\Users\Admin\AppData\Local\Temp\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4712
- C:\Users\Admin\AppData\Local\Temp\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
  "C:\Users\Admin\AppData\Local\Temp\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1892
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\4a0bb48e-4ad0-444f-8104-9fcf63eb5ee4" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:2292
- - C:\Users\Admin\AppData\Local\Temp\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
    "C:\Users\Admin\AppData\Local\Temp\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1680
  - - C:\Users\Admin\AppData\Local\Temp\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe
      "C:\Users\Admin\AppData\Local\Temp\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:1436

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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
58e3999b1fe770d3ac7a858fcbdd88e2

SHA1
c2f10739d2932cda3411c33be4c4dfa7ec48a5f6

SHA256
4b35ac6cfe304f9459d2c035585099f7f23001d4f78dca1096da2fbb8be2f947

SHA512
2e9f32c9fb4950bebd1c87b7671829173f965e59cc6dd668baf93072e04bc8d35a103c83658ee8e5bff92554eb82767fc6645c9ebf7e0516680fb4462c593a6f

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

Filesize
170B

MD5
67203b6150c2ec518f7a050f093ce907

SHA1
f27d23cbed87c12ba4ceb6aaa3a89a3aed906634

SHA256
feeebf4e3ad58d5c358496922131150160031e037afd2dc53a615e80ee760c31

SHA512
51092d62e3b7e2017087c4e73692b351bd1d96c852441a4c6c8317d57dd8083a6bbb63bd96fe9a3097c5ee6f03d00a4b1086782314e48d8dc81c5a9183a45d17

Download Submit
C:\Users\Admin\AppData\Local\4a0bb48e-4ad0-444f-8104-9fcf63eb5ee4\7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2.exe

Filesize
784KB

MD5
459803ec0adf835b5e93883d886fb100

SHA1
962df93776acb813318c02293efc35d8aa5904c1

SHA256
7327a0f712215331725901c0383927b50edc3cf9fbcdca70700fb613c59990b2

SHA512
c40ed8612973451546511558be95d8055b6a0e5ccdaee5b971abc1cd64bc50b036b1fc80e0101a198e42cf0fded9e007b5e062faf5a1cffddde068c9deeb0aa5

Download Submit
memory/1436-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-48-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-44-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-31-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1436-30-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1680-23-0x0000000000400000-0x00000000004EC000-memory.dmp

Filesize
944KB

Download
memory/1680-19-0x0000000000400000-0x00000000004EC000-memory.dmp

Filesize
944KB

Download
memory/1892-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1892-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1892-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1892-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1892-17-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4712-2-0x0000000002300000-0x000000000241B000-memory.dmp

Filesize
1.1MB

Download
memory/4712-1-0x0000000000560000-0x00000000005FB000-memory.dmp

Filesize
620KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads