Analysis
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max time kernel
138s -
max time network
138s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
22-01-2021 11:56
Static task
static1
Behavioral task
behavioral1
Sample
IMG_9501.EXE
Resource
win7v20201028
Behavioral task
behavioral2
Sample
IMG_9501.EXE
Resource
win10v20201028
General
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Target
IMG_9501.EXE
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Size
1.4MB
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MD5
e3d9793d14ec64e2398c709a3483c212
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SHA1
6a86e4ecd6529345e29fb461b59787a7560f4865
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SHA256
14dc0be4a9f52bb8c9614621b4d521ed56592dcde2483b6ff099d061bcb7cada
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SHA512
f3c0a8818fcc5bb09bd76fad45d49bb7af155e5c77bb58aac66323efb71c0a4853813c3ef964694e1b8df3e325a0602ec683f478a575616947a7624b8406128f
Malware Config
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger Payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/3840-27-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger behavioral2/memory/3840-28-0x000000000046364E-mapping.dmp family_snakekeylogger -
Executes dropped EXE 2 IoCs
Processes:
nsou.exeInstallUtil.exepid process 4060 nsou.exe 3840 InstallUtil.exe -
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 2 IoCs
Processes:
reg.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\naets = "C:\\Users\\Admin\\AppData\\Roaming\\nsou.exe" reg.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 14 checkip.dyndns.org 17 freegeoip.app 18 freegeoip.app -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of SetThreadContext 1 IoCs
Processes:
nsou.exedescription pid process target process PID 4060 set thread context of 3840 4060 nsou.exe InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 24 IoCs
Processes:
IMG_9501.EXEnsou.exeInstallUtil.exepid process 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 812 IMG_9501.EXE 4060 nsou.exe 4060 nsou.exe 3840 InstallUtil.exe 3840 InstallUtil.exe 3840 InstallUtil.exe 3840 InstallUtil.exe 3840 InstallUtil.exe 3840 InstallUtil.exe 3840 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
IMG_9501.EXEnsou.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 812 IMG_9501.EXE Token: SeDebugPrivilege 4060 nsou.exe Token: SeDebugPrivilege 3840 InstallUtil.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
IMG_9501.EXEcmd.exensou.exedescription pid process target process PID 812 wrote to memory of 216 812 IMG_9501.EXE cmd.exe PID 812 wrote to memory of 216 812 IMG_9501.EXE cmd.exe PID 812 wrote to memory of 216 812 IMG_9501.EXE cmd.exe PID 216 wrote to memory of 1976 216 cmd.exe reg.exe PID 216 wrote to memory of 1976 216 cmd.exe reg.exe PID 216 wrote to memory of 1976 216 cmd.exe reg.exe PID 812 wrote to memory of 4060 812 IMG_9501.EXE nsou.exe PID 812 wrote to memory of 4060 812 IMG_9501.EXE nsou.exe PID 812 wrote to memory of 4060 812 IMG_9501.EXE nsou.exe PID 4060 wrote to memory of 3840 4060 nsou.exe InstallUtil.exe PID 4060 wrote to memory of 3840 4060 nsou.exe InstallUtil.exe PID 4060 wrote to memory of 3840 4060 nsou.exe InstallUtil.exe PID 4060 wrote to memory of 3840 4060 nsou.exe InstallUtil.exe PID 4060 wrote to memory of 3840 4060 nsou.exe InstallUtil.exe PID 4060 wrote to memory of 3840 4060 nsou.exe InstallUtil.exe PID 4060 wrote to memory of 3840 4060 nsou.exe InstallUtil.exe PID 4060 wrote to memory of 3840 4060 nsou.exe InstallUtil.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\IMG_9501.EXE"C:\Users\Admin\AppData\Local\Temp\IMG_9501.EXE"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "naets" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\nsou.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeREG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "naets" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\nsou.exe"3⤵
- Adds Run key to start application
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C:\Users\Admin\AppData\Roaming\nsou.exe"C:\Users\Admin\AppData\Roaming\nsou.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\AppData\Roaming\nsou.exeMD5
e3d9793d14ec64e2398c709a3483c212
SHA16a86e4ecd6529345e29fb461b59787a7560f4865
SHA25614dc0be4a9f52bb8c9614621b4d521ed56592dcde2483b6ff099d061bcb7cada
SHA512f3c0a8818fcc5bb09bd76fad45d49bb7af155e5c77bb58aac66323efb71c0a4853813c3ef964694e1b8df3e325a0602ec683f478a575616947a7624b8406128f
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C:\Users\Admin\AppData\Roaming\nsou.exeMD5
e3d9793d14ec64e2398c709a3483c212
SHA16a86e4ecd6529345e29fb461b59787a7560f4865
SHA25614dc0be4a9f52bb8c9614621b4d521ed56592dcde2483b6ff099d061bcb7cada
SHA512f3c0a8818fcc5bb09bd76fad45d49bb7af155e5c77bb58aac66323efb71c0a4853813c3ef964694e1b8df3e325a0602ec683f478a575616947a7624b8406128f
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memory/216-10-0x0000000000000000-mapping.dmp
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memory/812-9-0x0000000007730000-0x0000000007731000-memory.dmpFilesize
4KB
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memory/812-3-0x0000000000380000-0x0000000000381000-memory.dmpFilesize
4KB
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memory/812-8-0x0000000000F60000-0x0000000000F61000-memory.dmpFilesize
4KB
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memory/812-2-0x0000000074070000-0x000000007475E000-memory.dmpFilesize
6.9MB
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memory/812-12-0x0000000004F01000-0x0000000004F02000-memory.dmpFilesize
4KB
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memory/812-5-0x0000000004D90000-0x0000000004D91000-memory.dmpFilesize
4KB
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memory/812-7-0x0000000000F30000-0x0000000000F4E000-memory.dmpFilesize
120KB
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memory/812-6-0x0000000004F00000-0x0000000004F01000-memory.dmpFilesize
4KB
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memory/1976-11-0x0000000000000000-mapping.dmp
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memory/3840-31-0x0000000074070000-0x000000007475E000-memory.dmpFilesize
6.9MB
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memory/3840-27-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/3840-28-0x000000000046364E-mapping.dmp
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memory/3840-34-0x00000000056B0000-0x00000000056B1000-memory.dmpFilesize
4KB
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memory/3840-36-0x00000000051E0000-0x00000000051E1000-memory.dmpFilesize
4KB
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memory/3840-37-0x0000000006340000-0x0000000006341000-memory.dmpFilesize
4KB
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memory/3840-39-0x00000000062D0000-0x00000000062D1000-memory.dmpFilesize
4KB
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memory/4060-24-0x0000000008140000-0x000000000814B000-memory.dmpFilesize
44KB
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memory/4060-25-0x000000000BFC0000-0x000000000BFC1000-memory.dmpFilesize
4KB
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memory/4060-26-0x00000000055E1000-0x00000000055E2000-memory.dmpFilesize
4KB
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memory/4060-13-0x0000000000000000-mapping.dmp
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memory/4060-23-0x00000000055E0000-0x00000000055E1000-memory.dmpFilesize
4KB
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memory/4060-16-0x0000000074070000-0x000000007475E000-memory.dmpFilesize
6.9MB