djvu | 82f0e9dfd4877c39903738a842045001359c431b114ca5cfa4e488a5c0257e06

General

Target

02b137b6b241a10dcb0b2fdbe5c1f090N.exe
Size

887KB
MD5

02b137b6b241a10dcb0b2fdbe5c1f090
SHA1

9a3642a88fbfb5dad28002fc59be862e67563acc
SHA256

82f0e9dfd4877c39903738a842045001359c431b114ca5cfa4e488a5c0257e06
SHA512

db143182e4df7bcc266f437191122f97aaeb451258dd0f8f17f3b9c51312098872faedeb8b1ae7c19f890ce54da71fc78e4225b77bd06d49965bcfcf5267408c
SSDEEP

12288:1G8ua3cRXmsmcU90p2aFZWI3ltIuEnnPJPYCGE1E2SIvhxfu0QnBYF7sFDF9R/:SaMkLBNanWKGuMRYDEO2SITQnBYZ+/

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

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

Attributes

extension
.piiq
offline_id
7ucZviScWxXXYEE1znZMXmqHoguKJq5lmLcV78t1
payload_url
http://astdg.top/files/penelop/updatewin1.exe

http://astdg.top/files/penelop/updatewin2.exe

http://astdg.top/files/penelop/updatewin.exe

http://astdg.top/files/penelop/3.exe

http://astdg.top/files/penelop/4.exe

http://astdg.top/files/penelop/5.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 17 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2740-2-0x00000000027C0000-0x00000000028DB000-memory.dmp	family_djvu
behavioral2/memory/1496-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/1496-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-24-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-38-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-42-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4256-43-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

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

Processes:

02b137b6b241a10dcb0b2fdbe5c1f090N.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	02b137b6b241a10dcb0b2fdbe5c1f090N.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

Processes:

icacls.exe

pid	Process
4852	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

02b137b6b241a10dcb0b2fdbe5c1f090N.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e50a789a-1266-4d1b-a55c-f203c91b037f\\02b137b6b241a10dcb0b2fdbe5c1f090N.exe\" --AutoStart"	02b137b6b241a10dcb0b2fdbe5c1f090N.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.

Processes:

flow	ioc
21	api.2ip.ua
22	api.2ip.ua
28	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

02b137b6b241a10dcb0b2fdbe5c1f090N.exe02b137b6b241a10dcb0b2fdbe5c1f090N.exe

description	pid	Process	procid_target
PID 2740 set thread context of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 4064 set thread context of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98

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

Processes:

icacls.exe02b137b6b241a10dcb0b2fdbe5c1f090N.exe02b137b6b241a10dcb0b2fdbe5c1f090N.exe02b137b6b241a10dcb0b2fdbe5c1f090N.exe02b137b6b241a10dcb0b2fdbe5c1f090N.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02b137b6b241a10dcb0b2fdbe5c1f090N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02b137b6b241a10dcb0b2fdbe5c1f090N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02b137b6b241a10dcb0b2fdbe5c1f090N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	02b137b6b241a10dcb0b2fdbe5c1f090N.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

02b137b6b241a10dcb0b2fdbe5c1f090N.exe02b137b6b241a10dcb0b2fdbe5c1f090N.exe

pid	Process
1496	02b137b6b241a10dcb0b2fdbe5c1f090N.exe
1496	02b137b6b241a10dcb0b2fdbe5c1f090N.exe
4256	02b137b6b241a10dcb0b2fdbe5c1f090N.exe
4256	02b137b6b241a10dcb0b2fdbe5c1f090N.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

02b137b6b241a10dcb0b2fdbe5c1f090N.exe02b137b6b241a10dcb0b2fdbe5c1f090N.exe02b137b6b241a10dcb0b2fdbe5c1f090N.exe

description	pid	Process	procid_target
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 2740 wrote to memory of 1496	2740	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	91
PID 1496 wrote to memory of 4852	1496	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	94
PID 1496 wrote to memory of 4852	1496	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	94
PID 1496 wrote to memory of 4852	1496	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	94
PID 1496 wrote to memory of 4064	1496	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	95
PID 1496 wrote to memory of 4064	1496	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	95
PID 1496 wrote to memory of 4064	1496	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	95
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98
PID 4064 wrote to memory of 4256	4064	02b137b6b241a10dcb0b2fdbe5c1f090N.exe	98

C:\Users\Admin\AppData\Local\Temp\02b137b6b241a10dcb0b2fdbe5c1f090N.exe
"C:\Users\Admin\AppData\Local\Temp\02b137b6b241a10dcb0b2fdbe5c1f090N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2740
- C:\Users\Admin\AppData\Local\Temp\02b137b6b241a10dcb0b2fdbe5c1f090N.exe
  "C:\Users\Admin\AppData\Local\Temp\02b137b6b241a10dcb0b2fdbe5c1f090N.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:1496
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\e50a789a-1266-4d1b-a55c-f203c91b037f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4852
- - C:\Users\Admin\AppData\Local\Temp\02b137b6b241a10dcb0b2fdbe5c1f090N.exe
    "C:\Users\Admin\AppData\Local\Temp\02b137b6b241a10dcb0b2fdbe5c1f090N.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4064
  - - C:\Users\Admin\AppData\Local\Temp\02b137b6b241a10dcb0b2fdbe5c1f090N.exe
      "C:\Users\Admin\AppData\Local\Temp\02b137b6b241a10dcb0b2fdbe5c1f090N.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4256

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
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
e5a1cfb0d99120e84905ecebda238ebe

SHA1
de265722a01f421580520762c815a6082b30852d

SHA256
4eea77ce692ad8c1821a20233feac1ab57eb9bb33b41cc5516d463f5a4f4b02e

SHA512
3c576c54368e9b2e98928787a857a4c9b1fc6dfdec586a62d5f69748a8e62ccb4cd51ad380496b50cb51d4042732a313fbc6fb6bbf7aee33ba59e08db950e3c9

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

Filesize
170B

MD5
d78fa326760547138800806d162b971e

SHA1
d7b8adbec43ca2ccf827a429c95ef72b10ab1dcc

SHA256
0e3e870089a9315c4ce2be0d2edfcbf72a5769ffab2ed6940b68e8138c82caa2

SHA512
1f29aaf3b39622216046eb9caba8811e0591d02f11bea938b32e6d279139488d8758fcb5ec3f2aedcc9b3ad64dddd33f7c86f28b23d9c86ff13b3937c5665836

Download Submit
C:\Users\Admin\AppData\Local\e50a789a-1266-4d1b-a55c-f203c91b037f\02b137b6b241a10dcb0b2fdbe5c1f090N.exe

Filesize
887KB

MD5
02b137b6b241a10dcb0b2fdbe5c1f090

SHA1
9a3642a88fbfb5dad28002fc59be862e67563acc

SHA256
82f0e9dfd4877c39903738a842045001359c431b114ca5cfa4e488a5c0257e06

SHA512
db143182e4df7bcc266f437191122f97aaeb451258dd0f8f17f3b9c51312098872faedeb8b1ae7c19f890ce54da71fc78e4225b77bd06d49965bcfcf5267408c

Download Submit
memory/1496-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/1496-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2740-1-0x0000000002720000-0x00000000027BD000-memory.dmp

Filesize
628KB

Download
memory/2740-2-0x00000000027C0000-0x00000000028DB000-memory.dmp

Filesize
1.1MB

Download
memory/4064-22-0x0000000000400000-0x000000000097D000-memory.dmp

Filesize
5.5MB

Download
memory/4064-25-0x0000000000400000-0x000000000097D000-memory.dmp

Filesize
5.5MB

Download
memory/4256-24-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-38-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-42-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4256-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads