Analysis
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max time kernel
142s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
26/01/2024, 03:24
Static task
static1
Behavioral task
behavioral1
Sample
76423c0da5d1aca1e737da17a2319250.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
76423c0da5d1aca1e737da17a2319250.exe
Resource
win10v2004-20231215-en
General
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Target
76423c0da5d1aca1e737da17a2319250.exe
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Size
758KB
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MD5
76423c0da5d1aca1e737da17a2319250
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SHA1
283a5e8ca8c196920b80d6353a1789b205992a8e
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SHA256
a11ffacad8ded4ac1f3e634d9cdcdda320d075cc6b2e71819958399ddd34b15c
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SHA512
a0b2fac294e914f1a0c17b4e60daa997d4f6fa5ecf527774ba6c9277ffb09e6510745c9a68cdf044cca62bd3d84944d4c50f641c4360b752e7bdafa536c3a49f
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SSDEEP
12288:yYyNIBTERFiRGWo/V4l8Jv2kpXCVFiialb09S4Ykp6ZuyBhQxXARwoOtnzM:yIBTJGr4029XVaZ09Nhp6ZuyBexX2Anz
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.nooa
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offline_id
PLtnD1U6oAmgxgJ2nJik1mY9SwUQg07CiN0zSet1
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payload_url
http://securebiz.org/dl/build2.exe
http://astdg.top/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
resource yara_rule behavioral1/memory/1996-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2044-6-0x0000000004510000-0x000000000462B000-memory.dmp family_djvu behavioral1/memory/1996-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1996-9-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1996-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-54-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-57-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-60-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-59-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-61-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2760-62-0x0000000000400000-0x0000000000537000-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
pid Process 2780 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-452311807-3713411997-1028535425-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\df82dcc7-f577-4b31-8abe-ddcbdd52f63f\\76423c0da5d1aca1e737da17a2319250.exe\" --AutoStart" 76423c0da5d1aca1e737da17a2319250.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 3 api.2ip.ua 4 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2044 set thread context of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2768 set thread context of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1996 76423c0da5d1aca1e737da17a2319250.exe 2760 76423c0da5d1aca1e737da17a2319250.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 2044 wrote to memory of 1996 2044 76423c0da5d1aca1e737da17a2319250.exe 28 PID 1996 wrote to memory of 2780 1996 76423c0da5d1aca1e737da17a2319250.exe 29 PID 1996 wrote to memory of 2780 1996 76423c0da5d1aca1e737da17a2319250.exe 29 PID 1996 wrote to memory of 2780 1996 76423c0da5d1aca1e737da17a2319250.exe 29 PID 1996 wrote to memory of 2780 1996 76423c0da5d1aca1e737da17a2319250.exe 29 PID 1996 wrote to memory of 2768 1996 76423c0da5d1aca1e737da17a2319250.exe 30 PID 1996 wrote to memory of 2768 1996 76423c0da5d1aca1e737da17a2319250.exe 30 PID 1996 wrote to memory of 2768 1996 76423c0da5d1aca1e737da17a2319250.exe 30 PID 1996 wrote to memory of 2768 1996 76423c0da5d1aca1e737da17a2319250.exe 30 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31 PID 2768 wrote to memory of 2760 2768 76423c0da5d1aca1e737da17a2319250.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2044 -
C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1996 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\df82dcc7-f577-4b31-8abe-ddcbdd52f63f" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2780
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C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2768 -
C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe"C:\Users\Admin\AppData\Local\Temp\76423c0da5d1aca1e737da17a2319250.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2760
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD58daed5fecd6b7116eb16ea66eda552e0
SHA1bb2149a2541f11dc4da8df7f4579dd65c341ce8b
SHA256076f87f4acbece273de34b83b72bb1a4cf38135f1cf27c49722ce8dfe5c60d71
SHA512eeb7e9bea6db27a316e09dd4cdaae0ccbb3d895e56dad92f54e59a6bb13e450fb6bfb09972f7a23aadba82960af004a7b72852d477b14b80d9d5a68dd6859fc7
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD567d0369a815beca831fd74b114db1c33
SHA1c6d4035209012ff2b27632063bbabcb2f24dbf53
SHA256e6ba88457bfe9c0a8304c46a25ea0d9e8c848ef254edad186a182bcb08920036
SHA51243ff54226703401a23826bbe2f419a409754e4bb3b049d2a972743a7189c3aa2bec42916a10e1c2d0d03fa3b285fd366831d1a6fc20561ddfc92b81751e18ce7
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD5b38139fbe38044e39021aa36dbd0eefd
SHA12b8edbacf551ed6641b04a6d6bec6befbfb8dd68
SHA256a76e802672679db3292d69bb8d7e4e34b498775899b6533b251c18be94f94d58
SHA5129dbe101e01a40b382df21d666e37bdcc20b4fb6258dfc292c71f6734f17b61d2a23c1df487a2d0034628e3533f08d49a2e93a6cab14c8b08f60758d3539ab82f
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5bef4ad6a5fddf1593f203d22f84e6071
SHA1414b894ad835fce6b9828b352e4d31457155400b
SHA256bd01c32bfd2226519a45c9c0dbcae7f15336d9e674f7e011257965a5aec40796
SHA512d5008ad4bb8a1b76ac39fa5fd8eaaf3a5700d0cb294e9fbc29a6832b67e56f61d5787fffaa4c9679d1117584d04d62e83585339ec2b4bce6723390b2e31949c7
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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C:\Users\Admin\AppData\Local\df82dcc7-f577-4b31-8abe-ddcbdd52f63f\76423c0da5d1aca1e737da17a2319250.exe
Filesize758KB
MD576423c0da5d1aca1e737da17a2319250
SHA1283a5e8ca8c196920b80d6353a1789b205992a8e
SHA256a11ffacad8ded4ac1f3e634d9cdcdda320d075cc6b2e71819958399ddd34b15c
SHA512a0b2fac294e914f1a0c17b4e60daa997d4f6fa5ecf527774ba6c9277ffb09e6510745c9a68cdf044cca62bd3d84944d4c50f641c4360b752e7bdafa536c3a49f