Analysis
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max time kernel
288s -
max time network
245s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
27-06-2024 22:58
Static task
static1
Behavioral task
behavioral1
Sample
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
Resource
win10-20240404-en
General
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Target
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
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Size
723KB
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MD5
7d80b0edbef2905f9b7e16495634fb84
-
SHA1
d890893f51a0fefd83bad32fd002d91bccf2bd5f
-
SHA256
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1
-
SHA512
ab2f98b5b2823095be19c0a5c8fdbe435f1964dab1cef02e2285ae13ffdeda6578a75668142934479551bd2b8de6ea831e7c559c14c568caa113f404a740c969
-
SSDEEP
12288:USic4OFvNWF8IiYuEa6DG2P56vyGL3wavO0SYn0d3hP2JodZa1TMnplQWWe0N3:UglWF8IQP6DG2P5WNi0SYnCRuJaZ6WWZ
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
-
extension
.watz
-
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
- payload_url
-
ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
Processes:
resource yara_rule behavioral2/memory/908-2-0x00000000021B0000-0x00000000022CB000-memory.dmp family_djvu behavioral2/memory/1840-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1840-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1840-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1840-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1840-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-41-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-44-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-43-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3036-45-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\aa2b423b-68f8-46ce-b297-5c1c11661b6a\\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe\" --AutoStart" 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.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 11 api.2ip.ua 1 api.2ip.ua 2 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exedescription pid process target process PID 908 set thread context of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 set thread context of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exepid process 1840 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 1840 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 3036 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 3036 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exedescription pid process target process PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 908 wrote to memory of 1840 908 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 1840 wrote to memory of 8 1840 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe icacls.exe PID 1840 wrote to memory of 8 1840 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe icacls.exe PID 1840 wrote to memory of 8 1840 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe icacls.exe PID 1840 wrote to memory of 2856 1840 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 1840 wrote to memory of 2856 1840 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 1840 wrote to memory of 2856 1840 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe PID 2856 wrote to memory of 3036 2856 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe 75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe"C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe"C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\aa2b423b-68f8-46ce-b297-5c1c11661b6a" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe"C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe"C:\Users\Admin\AppData\Local\Temp\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12Filesize
1KB
MD52365869258df7a66a2121b802ca4afd9
SHA173acc30a2edeb9d6830de559bb8a74f35168135d
SHA256d6b1932822bbd72a8e78c771717d992142348f67d625a42393719fefbe59b0ed
SHA512795004bab536e128dbd81c188976d37c7b650efbfa5a80374df4c65a1049c27658f4620b7605583928eb167fcb69b4c99e4c8730c507b824a7bde9c7fb0e21f4
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8Filesize
436B
MD51bfe0a81db078ea084ff82fe545176fe
SHA150b116f578bd272922fa8eae94f7b02fd3b88384
SHA2565ba8817f13eee00e75158bad93076ab474a068c6b52686579e0f728fda68499f
SHA51237c582f3f09f8d80529608c09041295d1644bcc9de6fb8c4669b05339b0dd870f9525abc5eed53ad06a94b51441275504bc943c336c5beb63b53460ba836ca8d
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12Filesize
174B
MD5fb595aa77fc7def5c5bbb1e5aa504b83
SHA10cf5d71936874f05a006da5727220c0e80c13e98
SHA256f406bd7da3722ebce28d328b129df45253b8e2c48dc5ceb30f2591e92c9050cb
SHA51206f81b4a7ef418fd2a225a40b914af58e16d881f51ba94dd4a2628bb370cecdf307082a1e99ea2d99e54c710dd9cb00bb1967706e71c2876341cbdcb587a1305
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8Filesize
170B
MD50b89af588313d7e09a10acde31e60d8c
SHA1520e088039f75a5c326a2a5c64c5dc2926b2db4f
SHA25603e78d9176d86d111fef4ad68716271625eac1a192accf3a3804e62766ae05a7
SHA512dc883ef2440078beba70067c0959f47bfa524c10c598e1b9b721ab599ff35ba0b5929d0e54ca9f1e967cd5aa1d268801f637d3b608a3affd5b9e695732fb5498
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C:\Users\Admin\AppData\Local\aa2b423b-68f8-46ce-b297-5c1c11661b6a\75a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1.exeFilesize
723KB
MD57d80b0edbef2905f9b7e16495634fb84
SHA1d890893f51a0fefd83bad32fd002d91bccf2bd5f
SHA25675a54146aef1fdce1499fcc4bcd379ea48ceb0556c6b37e158d87bb6e6d79fc1
SHA512ab2f98b5b2823095be19c0a5c8fdbe435f1964dab1cef02e2285ae13ffdeda6578a75668142934479551bd2b8de6ea831e7c559c14c568caa113f404a740c969
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memory/908-1-0x0000000001FE0000-0x000000000207A000-memory.dmpFilesize
616KB
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memory/908-2-0x00000000021B0000-0x00000000022CB000-memory.dmpFilesize
1.1MB
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memory/1840-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1840-22-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/1840-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1840-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1840-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2856-26-0x0000000000400000-0x00000000004BF000-memory.dmpFilesize
764KB
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memory/3036-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/3036-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/3036-25-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3036-36-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/3036-37-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/3036-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3036-38-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3036-41-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3036-44-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3036-43-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3036-45-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB