Analysis
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max time kernel
126s -
max time network
131s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
19/04/2022, 04:49
Static task
static1
Behavioral task
behavioral1
Sample
zxcv.exe
Resource
win7-20220414-en
General
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Target
zxcv.exe
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Size
100KB
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MD5
c7a310982da68b10360854f9cd78e718
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SHA1
60140c28e0b7db797a771c2dee081fa3812246db
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SHA256
df4876573295b4e7beb618db31a015ea617f61b811978bb168d432c4052f7731
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SHA512
6747fa3f7637922eeaa0feeb25d430dc6ab66fd9f3d22e7e5fd16bad9b75528a8174c34a8baf681950b64e8cdaa6a14e37633592e843c363e75468622ebd2ec3
Malware Config
Extracted
arkei
Default
Signatures
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suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA Environment Variable M4
suricata: ET MALWARE Base64 Encoded Stealer Config from Server - APPDATA Environment Variable M4
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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-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation zxcv.exe -
Loads dropped DLL 2 IoCs
pid Process 4028 MSBuild.exe 4028 MSBuild.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 1268 set thread context of 4028 1268 zxcv.exe 82 -
Program crash 1 IoCs
pid pid_target Process procid_target 668 4028 WerFault.exe 82 -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1268 zxcv.exe 1268 zxcv.exe 1268 zxcv.exe 1268 zxcv.exe 1268 zxcv.exe 1268 zxcv.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1268 zxcv.exe -
Suspicious use of WriteProcessMemory 13 IoCs
description pid Process procid_target PID 1268 wrote to memory of 860 1268 zxcv.exe 81 PID 1268 wrote to memory of 860 1268 zxcv.exe 81 PID 1268 wrote to memory of 860 1268 zxcv.exe 81 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82 PID 1268 wrote to memory of 4028 1268 zxcv.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\zxcv.exe"C:\Users\Admin\AppData\Local\Temp\zxcv.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1268 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe2⤵PID:860
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe2⤵
- Loads dropped DLL
PID:4028 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 13443⤵
- Program crash
PID:668
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 4028 -ip 40281⤵PID:2808
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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Filesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66