Analysis
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max time kernel
150s -
max time network
136s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
25/01/2024, 08:49
Static task
static1
Behavioral task
behavioral1
Sample
7441a4ce9c4e8ac5928eed31e78d925c.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
7441a4ce9c4e8ac5928eed31e78d925c.exe
Resource
win10v2004-20231222-en
General
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Target
7441a4ce9c4e8ac5928eed31e78d925c.exe
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Size
783KB
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MD5
7441a4ce9c4e8ac5928eed31e78d925c
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SHA1
7cacc24fbfb677bfadd4685d5f7820a946a44448
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SHA256
3a245127ba06fa4a0106c4562138e0dafba141aa265795859ee000662e4ca470
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SHA512
bfe262ba1c33ad1d0f8a26e12621a89f7156c68ab2762c0a0b3359345510fd3583599e6750d0ca5b08f4c2627f2c659c4110f47e8095f2ebdd97d1ddab6e01df
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SSDEEP
24576:OKflY4gwkcHJwM2mpL6di/wQyZaTzUC/B:OEgwZwlmB6ClbnB
Malware Config
Extracted
djvu
http://astdg.top/fhsgtsspen6/get.php
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extension
.orkf
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offline_id
4aBXQVNZ4BhjpMjt78QLIFtBSJPbgbflYLHrBut1
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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 12 IoCs
resource yara_rule behavioral1/memory/2880-3-0x0000000002430000-0x000000000254B000-memory.dmp family_djvu behavioral1/memory/2852-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2852-7-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2852-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2852-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2540-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2540-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2540-48-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2540-49-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2540-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/436-72-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/436-82-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Executes dropped EXE 2 IoCs
pid Process 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 436 7441a4ce9c4e8ac5928eed31e78d925c.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2888 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\\7441a4ce9c4e8ac5928eed31e78d925c.exe\" --AutoStart" 7441a4ce9c4e8ac5928eed31e78d925c.exe -
Looks up external IP address via web service 4 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 16 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 2880 set thread context of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2608 set thread context of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2108 set thread context of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 2540 7441a4ce9c4e8ac5928eed31e78d925c.exe 2540 7441a4ce9c4e8ac5928eed31e78d925c.exe 436 7441a4ce9c4e8ac5928eed31e78d925c.exe 436 7441a4ce9c4e8ac5928eed31e78d925c.exe -
Suspicious use of WriteProcessMemory 45 IoCs
description pid Process procid_target PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2880 wrote to memory of 2852 2880 7441a4ce9c4e8ac5928eed31e78d925c.exe 28 PID 2852 wrote to memory of 2888 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 29 PID 2852 wrote to memory of 2888 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 29 PID 2852 wrote to memory of 2888 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 29 PID 2852 wrote to memory of 2888 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 29 PID 2852 wrote to memory of 2608 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 30 PID 2852 wrote to memory of 2608 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 30 PID 2852 wrote to memory of 2608 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 30 PID 2852 wrote to memory of 2608 2852 7441a4ce9c4e8ac5928eed31e78d925c.exe 30 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2608 wrote to memory of 2540 2608 7441a4ce9c4e8ac5928eed31e78d925c.exe 31 PID 2148 wrote to memory of 2108 2148 taskeng.exe 36 PID 2148 wrote to memory of 2108 2148 taskeng.exe 36 PID 2148 wrote to memory of 2108 2148 taskeng.exe 36 PID 2148 wrote to memory of 2108 2148 taskeng.exe 36 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37 PID 2108 wrote to memory of 436 2108 7441a4ce9c4e8ac5928eed31e78d925c.exe 37
Processes
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C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2880 -
C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2852 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2888
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C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2608 -
C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe"C:\Users\Admin\AppData\Local\Temp\7441a4ce9c4e8ac5928eed31e78d925c.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2540
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C:\Windows\system32\taskeng.exetaskeng.exe {E04C05A8-D369-4263-9068-3FBACC90C32F} S-1-5-21-3427588347-1492276948-3422228430-1000:QVMRJQQO\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:2148 -
C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exeC:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exe --Task2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2108 -
C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exeC:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exe --Task3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:436
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD5819d2f6d228f94bfebac03edbfa4bc64
SHA1257acbdf2270c5285962d10460a77f422143cc8d
SHA256e8b016b694a9c3224b6a405cf52010c03b7bc6c8948ecc8a3d9aaa39a18f6d47
SHA512b81c03ca94d21cdb106281fa478dccd390e07bd0a03d0077952041f3d1d41a671ac9a3d4c97d41d9c8f74b14214abfcaff696a10d0615b603a7a9b1a67adde67
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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
MD5d5559587af50904e8573ad13ebd147fe
SHA12463fd1c78f2c95c2c53b585737438eb3968af4d
SHA256f4a26b399d93950f008cf93feb96b60769af013cf068e6f74cf6a5cb9cf386d8
SHA5120f171956daac5a7c6e583212de7b2cc5301406a114cebb1a987c46f0730776135c255d19740f51f15dd4574a844d4c65d90865671fc63b18200b11c7401cd719
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD575952e0c1c5670af5dcd379c606c9ebe
SHA127d234cc8b9469cb89c4e792c2e287f538acc28c
SHA256756bd5b16422ee0ff433b7c565eccc5f04836dda10568320320cf06c20601d92
SHA512775f16538dbed11a7e85b2a889d3736454a96e1e99041f483db81f1c416bc98ed3aa82f16b70033e04d9f4b88be7292fc44c36f96b3322ad7f3f6e8adb6111da
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5fea5c8a6d52044fb9537f5e6db72eae6
SHA169119fe9e4a26e99730e3be59bd198b25a799411
SHA256032d8c3018e0286c276f77e55f25b2eec22d0e1fb25b08125b04682346930a09
SHA512000121dbcdab19adf8c94deea2d670b08f10c5b5d97dae31c093f6e572fa4a11ed2bc586208fcc3a88c5fc717c99ee0a7799321d00f1c11bb63175ee395c3b82
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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Filesize
171KB
MD59c0c641c06238516f27941aa1166d427
SHA164cd549fb8cf014fcd9312aa7a5b023847b6c977
SHA2564276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
SHA512936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06
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C:\Users\Admin\AppData\Local\fbe9f230-573d-4c93-a77e-74a4e6f9e0ea\7441a4ce9c4e8ac5928eed31e78d925c.exe
Filesize783KB
MD57441a4ce9c4e8ac5928eed31e78d925c
SHA17cacc24fbfb677bfadd4685d5f7820a946a44448
SHA2563a245127ba06fa4a0106c4562138e0dafba141aa265795859ee000662e4ca470
SHA512bfe262ba1c33ad1d0f8a26e12621a89f7156c68ab2762c0a0b3359345510fd3583599e6750d0ca5b08f4c2627f2c659c4110f47e8095f2ebdd97d1ddab6e01df