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09/03/2025, 00:51 UTC
250309-a7pfgawvet 10General
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Target
Desktop.zip
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Size
770KB
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Sample
250309-a7pfgawvet
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MD5
45d7b26c64c4cf6380a85371a26ffb45
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SHA1
39504aa4617d5dd2c2a790c1eb5a651577bc7770
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SHA256
3cdad5d046d056559562601efd1f2e0eb14285303abbb43f148b76070f498534
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SHA512
5012907355a8b0b3d9973a3c468d90860687d6af0ff3b18316f87b0efe286a5bfa2237a0ae7f23259dcd009c181fa819502b8a64a678bd0168cba710076a347c
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SSDEEP
12288:xeE0t09aEHHFJySS4ii2biK71J0oHH/upHOcmpfq41OYDwu:xeEorQvySStuK7UoHH/quce1OYN
Static task
static1
Behavioral task
behavioral1
Sample
Trojan.Ransom.CoronaVirus.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
Trojan.Ransom.CoronaVirus.exe
Resource
win10v2004-20250217-en
Behavioral task
behavioral3
Sample
Trojan.Ransom.Jigsaw.exe
Resource
win7-20250207-en
Behavioral task
behavioral4
Sample
Trojan.Ransom.Jigsaw.exe
Resource
win10v2004-20250217-en
Malware Config
Extracted
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
coronavirus@qq.com
Extracted
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
coronavirus@qq.com
Targets
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Target
Trojan.Ransom.CoronaVirus.exe
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Size
1.0MB
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MD5
055d1462f66a350d9886542d4d79bc2b
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SHA1
f1086d2f667d807dbb1aa362a7a809ea119f2565
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SHA256
dddf7894b2e6aafa1903384759d68455c3a4a8348a7e2da3bd272555eba9bec0
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SHA512
2c5e570226252bdb2104c90d5b75f11493af8ed1be8cb0fd14e3f324311a82138753064731b80ce8e8b120b3fe7009b21a50e9f4583d534080e28ab84b83fee1
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SSDEEP
24576:FRYz/ERA0eMuWfHvgPw/83JI8CorP9qY0:FE/yADMuYvgP93JIc2
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Dharma
Dharma is a ransomware that uses security software installation to hide malicious activities.
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Dharma family
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Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (312) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
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Drops startup file
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Adds Run key to start application
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Drops desktop.ini file(s)
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Drops file in System32 directory
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Target
Trojan.Ransom.Jigsaw.exe
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Size
283KB
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MD5
2773e3dc59472296cb0024ba7715a64e
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SHA1
27d99fbca067f478bb91cdbcb92f13a828b00859
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SHA256
3ae96f73d805e1d3995253db4d910300d8442ea603737a1428b613061e7f61e7
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SHA512
6ef530b209f8ec459cca66dbf2c31ec96c5f7d609f17fa3b877d276968032fbc6132ea4a45ed1450fb6c5d730a7c9349bf4481e28befaea6b119ec0ded842262
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SSDEEP
6144:7fukPLPvucHiQQQ4uuy9ApZbZWxcZt+kTfMLJTOAZiYSXjjeqXus:7fu5cCT7yYlWi8kTfMLJTOAZiYSXjyqX
Score10/10-
Jigsaw Ransomware
Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.
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Jigsaw family
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Renames multiple (1999) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Adds Run key to start application
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MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Direct Volume Access
1Indicator Removal
2File Deletion
2Modify Registry
2Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1