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Analysis
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max time kernel
148s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
07/04/2024, 23:20
Static task
static1
Behavioral task
behavioral1
Sample
8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe
Resource
win10v2004-20240226-en
General
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Target
8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe
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Size
416KB
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MD5
4e4a92e6e153f656c2fe8e154e4532fb
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SHA1
0d089d7b4dcd9579c66db9df30de2b4b18ff119a
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SHA256
8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f
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SHA512
49bca24bae905b99fdd1351b607f16970f85949fb47754294df7f186e385e67426b487e8ea54db69feb39fdef875bc98a42b416235648d2224c1ad6a8e0a067a
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SSDEEP
6144:4jlYKRF/LReWAsUybQ3JAUvcblBodHMp8TB9cDLl443RZlCnw9X:4jauDReWUJAUvslBiH8mcDFlP
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2332 grkwn.exe -
Loads dropped DLL 2 IoCs
pid Process 1724 8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe 1724 8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft® Windows® Operating System = "C:\\ProgramData\\grkwn.exe" grkwn.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1724 wrote to memory of 2332 1724 8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe 28 PID 1724 wrote to memory of 2332 1724 8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe 28 PID 1724 wrote to memory of 2332 1724 8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe 28 PID 1724 wrote to memory of 2332 1724 8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe"C:\Users\Admin\AppData\Local\Temp\8ffe5404429a410caa2fb860e8629a5988e4d06f300963e87a7aeb3c3f25d20f.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1724 -
C:\ProgramData\grkwn.exe"C:\ProgramData\grkwn.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
PID:2332
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
416KB
MD5b132c82b4fdb4546392991fe773389e7
SHA120a5b17db9c418fa3eeceb0eb9851874e27638ab
SHA2562498f4d7bf895677073ec1e19edc3ffdb53f19ff35f09d4eb2135014c0266fe3
SHA512bcfb5338b905581e9f5974e6bf59c2d5bb2e14fd4a715d79c00da8bdd43b7fd6c66b64b82bae1a9ac3e29faa01099593576893341a3217702e59c4bded6c1aa2
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Filesize
136KB
MD5cb4c442a26bb46671c638c794bf535af
SHA18a742d0b372f2ddd2d1fdf688c3c4ac7f9272abf
SHA256f8d2c17bdf34ccfb58070ac8b131a8d95055340101a329f9a7212ac5240d0c25
SHA512074a31e8da403c0a718f93cbca50574d8b658921193db0e6e20eacd232379286f14a3698cd443dc740d324ad19d74934ae001a7ad64b88897d8afefbc9a3d4e3
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Filesize
279KB
MD57b0b4fb8941a0def1cbbf90a8d70d9f1
SHA132090658aee82fe8bbe9090b0f3e4a33927c8e58
SHA256238072443c375a5cca413ec01b4ea85a5b55ae34b06cb3737ee8c57115e6d85c
SHA512cab98835fadd6fa8d1fc0054247fdf0b8da0a443f9667ad4c9fb6b8298ed59647169936a69b5047c486ac61869a6b0c9bfee9ec4cb52865e3761f2f305c41a4a