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Analysis
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max time kernel
146s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20230703-en -
resource tags
arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system -
submitted
17/07/2023, 18:06
Behavioral task
behavioral1
Sample
a1c4f47574f17c_JC.exe
Resource
win7-20230712-en
Behavioral task
behavioral2
Sample
a1c4f47574f17c_JC.exe
Resource
win10v2004-20230703-en
General
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Target
a1c4f47574f17c_JC.exe
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Size
79KB
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MD5
a1c4f47574f17cccb1f996051000b8eb
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SHA1
3ddebe6844565c047042ba2e5123226e68046d7a
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SHA256
a5b12b05743152d34f9c008386e93b2496d3537f8c1c4aaca403ee09cf08c526
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SHA512
35479a2eecff366215dacbc30012c989a4467f637bde31cb3b72af5c29725c28f65648d220fae3f7bba02d06535820d44769b96d236875d6d06d4cbfe992f56f
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalDSnUb:1nK6a+qdOOtEvwDpjQ
Malware Config
Signatures
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000\Control Panel\International\Geo\Nation a1c4f47574f17c_JC.exe -
Executes dropped EXE 1 IoCs
pid Process 4724 asih.exe -
resource yara_rule behavioral2/memory/1628-133-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x00070000000230bc-146.dat upx behavioral2/files/0x00070000000230bc-148.dat upx behavioral2/files/0x00070000000230bc-149.dat upx behavioral2/memory/1628-151-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/4724-159-0x0000000000500000-0x000000000050F311-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1628 wrote to memory of 4724 1628 a1c4f47574f17c_JC.exe 85 PID 1628 wrote to memory of 4724 1628 a1c4f47574f17c_JC.exe 85 PID 1628 wrote to memory of 4724 1628 a1c4f47574f17c_JC.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\a1c4f47574f17c_JC.exe"C:\Users\Admin\AppData\Local\Temp\a1c4f47574f17c_JC.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1628 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4724
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
79KB
MD5480d1349b201f976b37604dabd3babbc
SHA13c91f3ac66fc8d3b647d1985b1aace1935e7ceaf
SHA256136709486e68822d0c5ba3d9f7dd96b75a38e7f43f1711431785cc7074c6e095
SHA512361c993748b4a4aa4e9f5585e6f273d191b6fc37b2495f6d246c0431323775717cf018afbe0cbe090ec1410b0414e0865d9a4d749fba866ff5d8af9c7d2e3a6a
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Filesize
79KB
MD5480d1349b201f976b37604dabd3babbc
SHA13c91f3ac66fc8d3b647d1985b1aace1935e7ceaf
SHA256136709486e68822d0c5ba3d9f7dd96b75a38e7f43f1711431785cc7074c6e095
SHA512361c993748b4a4aa4e9f5585e6f273d191b6fc37b2495f6d246c0431323775717cf018afbe0cbe090ec1410b0414e0865d9a4d749fba866ff5d8af9c7d2e3a6a
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Filesize
79KB
MD5480d1349b201f976b37604dabd3babbc
SHA13c91f3ac66fc8d3b647d1985b1aace1935e7ceaf
SHA256136709486e68822d0c5ba3d9f7dd96b75a38e7f43f1711431785cc7074c6e095
SHA512361c993748b4a4aa4e9f5585e6f273d191b6fc37b2495f6d246c0431323775717cf018afbe0cbe090ec1410b0414e0865d9a4d749fba866ff5d8af9c7d2e3a6a