djvu | d2c996657cc071187c1e84cd4720849addafb5f59a24d61b5ae49c646d0e748b

General

Target

F2D3.exe
Size

833KB
MD5

f48eb008b7dc078455742f66db4aa3c6
SHA1

9fa4e5e57e1845f8127bf8786567d52631a485d2
SHA256

57f531bb398323409f0e32d3d570eca0fc40c9aceda9baf4a6a0b92e02610f47
SHA512

7a5c575b4556ad0f9d845eafc14eb9d523b9ae98003948c4aa48f3eca0b110341fa14db573ea0f39e6269b13cfdb7871294d6d81a3409371441e1e4f997ff88a
SSDEEP

12288:wPb2JYkhvjPLBuCLgYWoQqMQTvU+w2ohi6927TNNlzgX8QjltSR4YgxQluu:wlSbLBucZ5nTMVX4hNZnQjAQyu

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://ugll.org/lancer/get.php

Attributes

extension
.errz
offline_id
e8w5MeiBrZVoHLoloPm9MNlKBzXH70BB3B2KQ7t1
payload_url
http://zerit.top/dl/build2.exe

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

Signatures

Detected Djvu ransomware 17 IoCs

resource	yara_rule
behavioral2/memory/4564-2-0x0000000002290000-0x00000000023AB000-memory.dmp	family_djvu
behavioral2/memory/2904-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2904-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2904-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2904-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2904-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-33-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-40-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-41-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4156-43-0x0000000000400000-0x0000000000537000-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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	F2D3.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3956	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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ecced55d-e175-4931-8491-367f7c75ac64\\F2D3.exe\" --AutoStart"	F2D3.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
19	api.2ip.ua
3	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4564 set thread context of 2904	4564	F2D3.exe	83
PID 4336 set thread context of 4156	4336	F2D3.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	F2D3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F2D3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F2D3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	F2D3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2904	F2D3.exe
2904	F2D3.exe
4156	F2D3.exe
4156	F2D3.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 4564 wrote to memory of 2904	4564	F2D3.exe	83
PID 2904 wrote to memory of 3956	2904	F2D3.exe	84
PID 2904 wrote to memory of 3956	2904	F2D3.exe	84
PID 2904 wrote to memory of 3956	2904	F2D3.exe	84
PID 2904 wrote to memory of 4336	2904	F2D3.exe	85
PID 2904 wrote to memory of 4336	2904	F2D3.exe	85
PID 2904 wrote to memory of 4336	2904	F2D3.exe	85
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87
PID 4336 wrote to memory of 4156	4336	F2D3.exe	87

C:\Users\Admin\AppData\Local\Temp\F2D3.exe
"C:\Users\Admin\AppData\Local\Temp\F2D3.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Users\Admin\AppData\Local\Temp\F2D3.exe
  "C:\Users\Admin\AppData\Local\Temp\F2D3.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:2904
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\ecced55d-e175-4931-8491-367f7c75ac64" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3956
- - C:\Users\Admin\AppData\Local\Temp\F2D3.exe
    "C:\Users\Admin\AppData\Local\Temp\F2D3.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4336
  - - C:\Users\Admin\AppData\Local\Temp\F2D3.exe
      "C:\Users\Admin\AppData\Local\Temp\F2D3.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4156

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
4c56c299ec085cfc8478c9d61b970281

SHA1
184ee8b9c517345187b212ded333189ba195e8a4

SHA256
9efc9ff810fad33e53611a25b4c94ec17b4240c500460ba6eebeda7f9994427a

SHA512
b8dd010a6f436c3b62f2cadcb4cb57377cb8d5f0fbc63312881149112fb843944b7e9bd4321ae53138d139f39ca17c739f2e6916d1faf86dfde3332c687063a4

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

Filesize
170B

MD5
f317a741d7ff33bb5f17c29af27ea852

SHA1
e529bd58723fe7f6cde7b38bff47f60ee0fd46ef

SHA256
65960cfb711faa9917ae4ab662f0aad930602acd48d5b105225b5dd9ad1708e6

SHA512
62491ee3f51b8b503785f847833a1227f22f77f77fc6833cfd024425d6a0ae9b2c311fa81f46f842837f49d0858f28e779241ec2c3abfc11c6e9cab0adf2fd49

Download Submit
C:\Users\Admin\AppData\Local\ecced55d-e175-4931-8491-367f7c75ac64\F2D3.exe

Filesize
833KB

MD5
f48eb008b7dc078455742f66db4aa3c6

SHA1
9fa4e5e57e1845f8127bf8786567d52631a485d2

SHA256
57f531bb398323409f0e32d3d570eca0fc40c9aceda9baf4a6a0b92e02610f47

SHA512
7a5c575b4556ad0f9d845eafc14eb9d523b9ae98003948c4aa48f3eca0b110341fa14db573ea0f39e6269b13cfdb7871294d6d81a3409371441e1e4f997ff88a

Download Submit
memory/2904-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2904-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2904-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2904-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2904-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-33-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-43-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-41-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-40-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4156-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4336-23-0x0000000000400000-0x0000000000511000-memory.dmp

Filesize
1.1MB

Download
memory/4336-27-0x0000000000400000-0x0000000000511000-memory.dmp

Filesize
1.1MB

Download
memory/4564-2-0x0000000002290000-0x00000000023AB000-memory.dmp

Filesize
1.1MB

Download
memory/4564-1-0x0000000000A50000-0x0000000000AEB000-memory.dmp

Filesize
620KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads