a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2

General

Target

a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe
Size

180KB
MD5

2ec852a71edc81327573b3ee3e4c3d9e
SHA1

2331672f9ebb1408a236ae65639c9d7eb5a520fc
SHA256

a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2
SHA512

8198c24ff0806d55d0f1b0ef3f5f26ebd4be4f8d76eda4b9ea438cf5bc7e6cf3b2750e3c27c819003b672aff7a2ad52fee79bcb363df2d791d60162f92acd85d
SSDEEP

3072:SIWGdYRLoeEdRos/eaqFnqWDb+uTyLDC6s5sSYqGlC6YViZj5HQXZmmJ0yCFioxj:9vcKPpm2lC6YViZj5HQXZmmJ0yCF9BxF

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exekouwof.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	kouwof.exe

Executes dropped EXE 1 IoCs

Processes:

kouwof.exe

pid process

3600 kouwof.exe

pid	process
3600	kouwof.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe

Adds Run key to start application 2 TTPs 50 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

kouwof.exea6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /j"	kouwof.exe
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /f"	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /G"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /X"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /O"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /o"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /e"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /F"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /V"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /Z"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /c"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /N"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /t"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /B"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /W"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /y"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /s"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /J"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /l"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /a"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /p"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /P"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /r"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /w"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /D"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /f"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /I"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /A"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /d"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /x"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /T"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /Q"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /m"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /K"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /h"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /z"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /q"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /U"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /H"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /u"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /n"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /R"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /S"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /k"	kouwof.exe
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run\	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /M"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /v"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /b"	kouwof.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kouwof = "C:\\Users\\Admin\\kouwof.exe /g"	kouwof.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exekouwof.exe

pid	process
704	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe
704	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe
3600	kouwof.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exekouwof.exe

pid process

704 a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe
3600 kouwof.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe

description	pid	process	target process
PID 704 wrote to memory of 3600	704	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe	kouwof.exe
PID 704 wrote to memory of 3600	704	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe	kouwof.exe
PID 704 wrote to memory of 3600	704	a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe	kouwof.exe

C:\Users\Admin\AppData\Local\Temp\a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe
"C:\Users\Admin\AppData\Local\Temp\a6a517cb8645b45b07cff88dfa462a8dcf9068c6832cf7d69d9dd9da8dcd8eb2.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:704

C:\Users\Admin\kouwof.exe
"C:\Users\Admin\kouwof.exe"
2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
PID:3600

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

1

T1158

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\kouwof.exe
Filesize
180KB

MD5
f957876b44fe4a7751484063ce0cdc0a

SHA1
d3b896f60bfcb77b40ca2ef4affcaed561647223

SHA256
6ab7ae7fa3550f5e9954f99486671d10bbed99de829c017aa1543274891da4a0

SHA512
7dcdc734c1d3896486c7d11371937d5b3411c873947b440fc13d28c2d7345dbff68c65c16a901ad202c4a0e5bf3644c6f2039bb6b6ae4371712124d93d3830be

Download Submit
C:\Users\Admin\kouwof.exe
Filesize
180KB

MD5
f957876b44fe4a7751484063ce0cdc0a

SHA1
d3b896f60bfcb77b40ca2ef4affcaed561647223

SHA256
6ab7ae7fa3550f5e9954f99486671d10bbed99de829c017aa1543274891da4a0

SHA512
7dcdc734c1d3896486c7d11371937d5b3411c873947b440fc13d28c2d7345dbff68c65c16a901ad202c4a0e5bf3644c6f2039bb6b6ae4371712124d93d3830be

Download Submit
memory/3600-134-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads