djvu | f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb

General

Target

f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
Size

713KB
MD5

e52172154ddb3ba654b6b91fdce8020e
SHA1

68278fec9526ef91c1d06e5a83bced2dc13e178f
SHA256

f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb
SHA512

38c9b20cc56468026ebf6088174cd644456ea1acd5dc6a3a9fdbe328b7cb9e2f2c7ecf6ae3d3e798002a4fde3b1bcc61e696ff777071fbdd1efad24c504a6c5c
SSDEEP

12288:QRr71FAmv1eFrc4JTs+OuLO2TB07mBnY4YxsOtnRt+htHI+djNFWMd7m9c0FqpHL:8PAkEFBr1O2uSi4YxsOhH+hRIrMd7I4r

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/test1/get.php

Attributes

extension
.gaze
offline_id
jB2aJtVEWRwbJf76a6OKB8sn0BtTgNlHYUC5wLt1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 19 IoCs

resource	yara_rule
behavioral2/memory/1876-3-0x0000000002540000-0x000000000265B000-memory.dmp	family_djvu
behavioral2/memory/4200-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4200-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4200-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4200-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/4200-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-25-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-57-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-68-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-69-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-72-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-71-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-73-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2560-74-0x0000000000400000-0x0000000000537000-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 2 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	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4592	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\\dff2c374-5bad-44c7-a663-4238bec7ae3e\\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe\" --AutoStart"	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.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
5	api.2ip.ua
6	api.2ip.ua
20	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1876 set thread context of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1236 set thread context of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.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	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4200	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
4200	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
2560	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
2560	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 1876 wrote to memory of 4200	1876	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	83
PID 4200 wrote to memory of 4592	4200	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	84
PID 4200 wrote to memory of 4592	4200	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	84
PID 4200 wrote to memory of 4592	4200	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	84
PID 4200 wrote to memory of 1236	4200	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	85
PID 4200 wrote to memory of 1236	4200	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	85
PID 4200 wrote to memory of 1236	4200	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	85
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87
PID 1236 wrote to memory of 2560	1236	f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe	87

C:\Users\Admin\AppData\Local\Temp\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
"C:\Users\Admin\AppData\Local\Temp\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1876
- C:\Users\Admin\AppData\Local\Temp\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
  "C:\Users\Admin\AppData\Local\Temp\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.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:4200
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\dff2c374-5bad-44c7-a663-4238bec7ae3e" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4592
- - C:\Users\Admin\AppData\Local\Temp\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
    "C:\Users\Admin\AppData\Local\Temp\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1236
  - - C:\Users\Admin\AppData\Local\Temp\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe
      "C:\Users\Admin\AppData\Local\Temp\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Checks computer location settings
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2560

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

Replay Monitor

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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
1792f2748c08dcfe3e4d44dfa1a4bfd2

SHA1
6d05b4188ce2ccf84df122a5f61efabcc83d3940

SHA256
96025a9b4895311be8ade4707cfcad1f2fa8cc8079874a8cd2964b93ffa956d9

SHA512
2b5870b19fe89fb83e155000a7822614914bb39cdd85081bd211e658d231c5917525292a6bc42c02d775813920e8ddd96af9339bf65e54ebf2ab4c7d541dea6f

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

Filesize
170B

MD5
a43d381b1cb59df6ca03d3e2e0116825

SHA1
8547e9a687b58e37a9082f35aabd5ecc2cbab88a

SHA256
a8c7450b59f764eb142ad1619ffd79328e47cf2e7f1fd5623d0078fbee28090f

SHA512
c5c83b5b82f5db3a7a195a0347752641bb301143bdb2962d8434e913f8968e8c25e2ac46a8e9765bb4ed76bb7da84520c44c025fbe681ebb155670cde9362d1b

Download Submit
C:\Users\Admin\AppData\Local\bowsakkdestx.txt

Filesize
449B

MD5
caa078f0348cda98328127c142e3bfed

SHA1
e38274d642c806a3affcca8f7e37b61f591c47e6

SHA256
91faeb982f34313750a83d74c5464abe4e01357d1a7ea4253973509bc0e9d219

SHA512
2e6a5c482b5226079c6b4bd9a706537c372a3b43962f64be6bdd281e3217f963316ef0eba38164890bdf14af6558eb26605320487f0a0c841be9bb813c2ee5d6

Download Submit
C:\Users\Admin\AppData\Local\dff2c374-5bad-44c7-a663-4238bec7ae3e\f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb.exe

Filesize
713KB

MD5
e52172154ddb3ba654b6b91fdce8020e

SHA1
68278fec9526ef91c1d06e5a83bced2dc13e178f

SHA256
f0689cff028781477fb7e00cb27868980453ee4770b6b20dbf35d1d0e6de66fb

SHA512
38c9b20cc56468026ebf6088174cd644456ea1acd5dc6a3a9fdbe328b7cb9e2f2c7ecf6ae3d3e798002a4fde3b1bcc61e696ff777071fbdd1efad24c504a6c5c

Download Submit
C:\Users\Admin\AppData\Local\f6376974-692a-4a54-95dd-817e184063b6\build3.exe

Filesize
437B

MD5
6910426a598bc0b07dd6ca7c2faf5c22

SHA1
4304d65a08652b167453997e1464cc6ef034be23

SHA256
ebfef207462c29030b8a06068c8cbf1cfeae1304813b9cdbfa2d705b314bf692

SHA512
5e96757fa5daa336968aa07d5fe5525040a081a547dd6bad55bed4539ad76b3f96aabd38f461efdafa4a427963b2a3187cc40dfa60c74e6c6ddf738176381952

Download Submit
memory/1236-28-0x0000000000400000-0x0000000000730000-memory.dmp

Filesize
3.2MB

Download
memory/1236-19-0x0000000000400000-0x0000000000730000-memory.dmp

Filesize
3.2MB

Download
memory/1236-23-0x0000000000400000-0x0000000000730000-memory.dmp

Filesize
3.2MB

Download
memory/1876-2-0x00000000023D0000-0x0000000002471000-memory.dmp

Filesize
644KB

Download
memory/1876-0-0x0000000000400000-0x0000000000730000-memory.dmp

Filesize
3.2MB

Download
memory/1876-3-0x0000000002540000-0x000000000265B000-memory.dmp

Filesize
1.1MB

Download
memory/2560-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-74-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-73-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-71-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-72-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-25-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-57-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-69-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-68-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4200-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4200-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4200-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4200-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4200-6-0x0000000000400000-0x0000000000537000-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