Analysis
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max time kernel
145s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
06/04/2023, 21:33
Static task
static1
Behavioral task
behavioral1
Sample
cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe
Resource
win10v2004-20230220-en
General
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Target
cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe
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Size
691KB
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MD5
e79ef59b625dee8067807985e0506eb5
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SHA1
f765ae06a338aa095518b5241d4abc7df33a8ee5
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SHA256
cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb
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SHA512
7603837f73137a1ba47ad16caddcec0020cf995c642b7b394f22ae2b44b62da439b7128fcad53850d00a0e2f75cdfa1e29f6cc52b5be129942bdbaac4cb68a9c
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SSDEEP
12288:p18lxoiEPb9GTLlRRhA8D7Sf0n0jCp/u2GWaEpUUE93o:wnkRGHfA8DWWMChGW+0
Malware Config
Extracted
djvu
http://zexeq.com/test2/get.php
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extension
.kifr
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offline_id
iIlWwF8bQ6n1I71JdbwrJ0LNue9L0IeEoD6KAJt1
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payload_url
http://uaery.top/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 16 IoCs
resource yara_rule behavioral2/memory/216-134-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/216-135-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2492-136-0x0000000002300000-0x000000000241B000-memory.dmp family_djvu behavioral2/memory/216-137-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/216-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/216-150-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-153-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-154-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-161-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-162-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-163-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-167-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-170-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-169-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-180-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4552-184-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe Key value queried \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe -
Executes dropped EXE 2 IoCs
pid Process 5084 build3.exe 4104 mstsca.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 2580 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b0657715-6aa2-434e-b0d3-17c24b4ec055\\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe\" --AutoStart" cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.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 10 api.2ip.ua 25 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2492 set thread context of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2292 set thread context of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 5052 schtasks.exe 3512 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 216 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 216 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 4552 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 4552 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe -
Suspicious use of WriteProcessMemory 35 IoCs
description pid Process procid_target PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 2492 wrote to memory of 216 2492 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 84 PID 216 wrote to memory of 2580 216 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 85 PID 216 wrote to memory of 2580 216 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 85 PID 216 wrote to memory of 2580 216 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 85 PID 216 wrote to memory of 2292 216 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 86 PID 216 wrote to memory of 2292 216 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 86 PID 216 wrote to memory of 2292 216 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 86 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 2292 wrote to memory of 4552 2292 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 88 PID 4552 wrote to memory of 5084 4552 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 93 PID 4552 wrote to memory of 5084 4552 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 93 PID 4552 wrote to memory of 5084 4552 cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe 93 PID 5084 wrote to memory of 3512 5084 build3.exe 94 PID 5084 wrote to memory of 3512 5084 build3.exe 94 PID 5084 wrote to memory of 3512 5084 build3.exe 94 PID 4104 wrote to memory of 5052 4104 mstsca.exe 99 PID 4104 wrote to memory of 5052 4104 mstsca.exe 99 PID 4104 wrote to memory of 5052 4104 mstsca.exe 99
Processes
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C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe"C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2492 -
C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe"C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:216 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\b0657715-6aa2-434e-b0d3-17c24b4ec055" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2580
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C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe"C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2292 -
C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe"C:\Users\Admin\AppData\Local\Temp\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4552 -
C:\Users\Admin\AppData\Local\e826f779-7360-4b3c-8c61-f6a754a518c3\build3.exe"C:\Users\Admin\AppData\Local\e826f779-7360-4b3c-8c61-f6a754a518c3\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:5084 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"6⤵
- Creates scheduled task(s)
PID:3512
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4104 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"2⤵
- Creates scheduled task(s)
PID:5052
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD576a44c88579ed3e3d8ab8478d3cbc539
SHA1539ac9f837efb72f7c9131b8974b747e7f65c049
SHA256ba7af773db817754379099994f9bc4447dcdd2c2160137fafc1a4a88f68a89a5
SHA512772aa0b4c0e8816ed1aa6be6ce3de1b62777bf34adc4db5b9c547e00f53112fd4b7c79481f7f10bc72be83fb0298f9c57fdb715dd70292d2bdc1fbe773178558
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD5c97719e1ef3b8a984fefecd795e00952
SHA1840ddea4fb5b5bd686561ca3773e41ec0bb6eebc
SHA256b2e05305cab46dd563531bf03b63104237845b7279f7b986d8659bf63f3de3a0
SHA512bb24c4e897b044615c19d1d8496d73c8ed2a058d44167099616c9f02707409ca3a50d39ff4a1d644586fbda3bf797f2b62251a631b7379c39f9a912d446c54b0
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD57bf03746e5467800ae82d5aa17b315f5
SHA1577a65312f362fc6666d3358d58a1d9a3f23f402
SHA256d5be9fbc8eb92d676e4e1bde2d97a62b554b19267eac1e8365cec9a43b3c9fd5
SHA512293db1c5f3deef4ff69d26b1afb6f1eee3e6af3c65bd1adc3a92f5b54b240ad6c79bef98053962075f9d36ebd12d32e1108814a1177dba616dbfa9cb22cf3608
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD5513401542742d99fcd21f6489c664976
SHA1453a5dd3096c4113b732865d4627c98c43286363
SHA25697974ced402c237412a61cb20ffabf653843ef520d132c2110eac7b35124f8a1
SHA512cf3965f5aae96a74c1538be38b89a3238aa38f1ca3a5e3865d766c0a572a9c2f432a8720200489e621f886da97a84ade0ad80580269106d52a9031f9a2bd3dd6
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C:\Users\Admin\AppData\Local\b0657715-6aa2-434e-b0d3-17c24b4ec055\cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb.exe
Filesize691KB
MD5e79ef59b625dee8067807985e0506eb5
SHA1f765ae06a338aa095518b5241d4abc7df33a8ee5
SHA256cda9f5037aff065e59e3709e79a7528e0a4bbb9bd12a43a28264b8f5f0e200fb
SHA5127603837f73137a1ba47ad16caddcec0020cf995c642b7b394f22ae2b44b62da439b7128fcad53850d00a0e2f75cdfa1e29f6cc52b5be129942bdbaac4cb68a9c
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a