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Analysis
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max time kernel
143s -
max time network
129s -
platform
windows7_x64 -
resource
win7-20230831-en -
resource tags
arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system -
submitted
10/10/2023, 19:47
Static task
static1
Behavioral task
behavioral1
Sample
NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe
Resource
win10v2004-20230915-en
General
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Target
NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe
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Size
58KB
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MD5
b9d3a4cc85f9a26015fe4479d0812e49
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SHA1
d34eb58d54d120c7243c882d54baa96e75e2b06a
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SHA256
b4ef2c05e5bda32c7ac5d7e2a6f2bcb9df4727c7dd44f8e86ee0e32f2a54a05f
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SHA512
cfd4630d71900487358df8d3f938cca5138db90a3dac1b02e4868e81308942b23dafd3d7826cccacbca836a45dd740534fd959087eb2f5367d59c559ba5d6f3d
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SSDEEP
768:MDcpEBMLfQcubV5wGE96YyXDTLdNSSS583:MDcfLfIbtEbyXfZb
Malware Config
Signatures
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Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
pid Process 1588 attrib.exe -
Deletes itself 1 IoCs
pid Process 2724 cmd.exe -
Executes dropped EXE 1 IoCs
pid Process 1692 zskhost.exe -
Drops file in Windows directory 3 IoCs
description ioc Process File opened for modification C:\Windows\Debug\zskhost.exe NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe File opened for modification C:\Windows\Debug\zskhost.exe attrib.exe File created C:\Windows\Debug\zskhost.exe NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeIncBasePriorityPrivilege 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 1288 wrote to memory of 1588 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe 28 PID 1288 wrote to memory of 1588 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe 28 PID 1288 wrote to memory of 1588 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe 28 PID 1288 wrote to memory of 1588 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe 28 PID 1288 wrote to memory of 2724 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe 31 PID 1288 wrote to memory of 2724 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe 31 PID 1288 wrote to memory of 2724 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe 31 PID 1288 wrote to memory of 2724 1288 NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe 31 -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 1588 attrib.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.b9d3a4cc85f9a26015fe4479d0812e49_JC.exe"1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1288 -
C:\Windows\SysWOW64\attrib.exeattrib +a +s +h +r C:\Windows\Debug\zskhost.exe2⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:1588
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\NEASB9~1.EXE > nul2⤵
- Deletes itself
PID:2724
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C:\Windows\Debug\zskhost.exeC:\Windows\Debug\zskhost.exe1⤵
- Executes dropped EXE
PID:1692
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
58KB
MD502f841027c93a73547b65e7303a8c171
SHA19b66cdea4fdb096aa980e4290ca5bb295fb73f92
SHA256449ce2e8e8cc379e50ac07e1f0e8a18b531328dc4902e8023a8bb489bd6852ed
SHA5126ca6aad100605b5c6880102d0ba36a2adaf2763fe467188220289ca27632c6286a3db5f229499fb017950cebb4d8d7102c0246f16b3012833a158aed4bbca367
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Filesize
58KB
MD502f841027c93a73547b65e7303a8c171
SHA19b66cdea4fdb096aa980e4290ca5bb295fb73f92
SHA256449ce2e8e8cc379e50ac07e1f0e8a18b531328dc4902e8023a8bb489bd6852ed
SHA5126ca6aad100605b5c6880102d0ba36a2adaf2763fe467188220289ca27632c6286a3db5f229499fb017950cebb4d8d7102c0246f16b3012833a158aed4bbca367