b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095

Analysis

max time kernel
150s
max time network
166s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
03/12/2022, 14:45

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General

Target

b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe
Size

303KB
MD5

ca38d458ca0f9124800d82272521350c
SHA1

188e5a7a19b4fe78f3669171a94817c854ad9306
SHA256

b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095
SHA512

944a5c53e0baf7320ba350647fdbe99f773a319f6a2c05e5af73116391007a45913a0fd340b0d58effb52bc1ed6e804871b0f0cc2e60b092209fc4eebaacf70c
SSDEEP

6144:Jt9AuK7K47+46NvC24o3VO7fy9JT6RCFZL4w9rG8Fza+:fmHK47+M22mZp9rpz

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1728	ostyux.exe

Deletes itself 1 IoCs

pid	Process
468	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\Currentversion\Run	ostyux.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\{7BD94DA8-4FEF-AD4D-5225-887A4931AB67} = "C:\\Users\\Admin\\AppData\\Roaming\\Syry\\ostyux.exe"	ostyux.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1224 set thread context of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe
1728	ostyux.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe
1728	ostyux.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1224 wrote to memory of 1728	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	28
PID 1224 wrote to memory of 1728	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	28
PID 1224 wrote to memory of 1728	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	28
PID 1224 wrote to memory of 1728	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	28
PID 1224 wrote to memory of 1728	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	28
PID 1224 wrote to memory of 1728	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	28
PID 1224 wrote to memory of 1728	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	28
PID 1728 wrote to memory of 1108	1728	ostyux.exe	12
PID 1728 wrote to memory of 1108	1728	ostyux.exe	12
PID 1728 wrote to memory of 1108	1728	ostyux.exe	12
PID 1728 wrote to memory of 1108	1728	ostyux.exe	12
PID 1728 wrote to memory of 1108	1728	ostyux.exe	12
PID 1728 wrote to memory of 1180	1728	ostyux.exe	11
PID 1728 wrote to memory of 1180	1728	ostyux.exe	11
PID 1728 wrote to memory of 1180	1728	ostyux.exe	11
PID 1728 wrote to memory of 1180	1728	ostyux.exe	11
PID 1728 wrote to memory of 1180	1728	ostyux.exe	11
PID 1728 wrote to memory of 1232	1728	ostyux.exe	10
PID 1728 wrote to memory of 1232	1728	ostyux.exe	10
PID 1728 wrote to memory of 1232	1728	ostyux.exe	10
PID 1728 wrote to memory of 1232	1728	ostyux.exe	10
PID 1728 wrote to memory of 1232	1728	ostyux.exe	10
PID 1728 wrote to memory of 1224	1728	ostyux.exe	8
PID 1728 wrote to memory of 1224	1728	ostyux.exe	8
PID 1728 wrote to memory of 1224	1728	ostyux.exe	8
PID 1728 wrote to memory of 1224	1728	ostyux.exe	8
PID 1728 wrote to memory of 1224	1728	ostyux.exe	8
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29
PID 1224 wrote to memory of 468	1224	b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe	29

C:\Users\Admin\AppData\Local\Temp\b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe
"C:\Users\Admin\AppData\Local\Temp\b5f1c27ecbba78618e5b0134bca4bf05141b767772c4856c8d21db49fd555095.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1224
- C:\Users\Admin\AppData\Roaming\Syry\ostyux.exe
  "C:\Users\Admin\AppData\Roaming\Syry\ostyux.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of UnmapMainImage
  - Suspicious use of WriteProcessMemory
  PID:1728
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\tmp559adde7.bat"
  2⤵
  - Deletes itself
  PID:468

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1232

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1180

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1108

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp559adde7.bat

Filesize
307B

MD5
4ea99dd96c30450a2695e52d77767ab1

SHA1
57da8c6abfa4cc5ec1a6ebf081d50c26550c89a0

SHA256
5175077fee3a376db41c9c504831717ab15bfce27bd0cd5e081f39f7d648165e

SHA512
ea4988aa90cce288d512409b2b2e133f4288e89eaa607e5460bc1c3c96b714ae568ddb6d080491b0d485266f87a8988dcdff3a04d112c69c8a64d3f13a5c43f2

Download Submit
C:\Users\Admin\AppData\Roaming\Syry\ostyux.exe

Filesize
303KB

MD5
ab0d82166dbd474db07af3d11e66ff00

SHA1
ed40cca40ae6f942533f3389d27201a39f47b4f0

SHA256
6a53793e1071b0b0425bc2b672f69a3035ea67493aa12a0284e3dde2732b16cc

SHA512
f805df3fb06932d111e0ed49c5edf4bbc78a4a8327779385c5aa059ca9fd9289c5d717159b8425d5a15332c1c40355fed44d1ca915e3e6f354a5442d7125e19e

Download Submit
C:\Users\Admin\AppData\Roaming\Syry\ostyux.exe

Filesize
303KB

MD5
ab0d82166dbd474db07af3d11e66ff00

SHA1
ed40cca40ae6f942533f3389d27201a39f47b4f0

SHA256
6a53793e1071b0b0425bc2b672f69a3035ea67493aa12a0284e3dde2732b16cc

SHA512
f805df3fb06932d111e0ed49c5edf4bbc78a4a8327779385c5aa059ca9fd9289c5d717159b8425d5a15332c1c40355fed44d1ca915e3e6f354a5442d7125e19e

Download Submit
\Users\Admin\AppData\Roaming\Syry\ostyux.exe

Filesize
303KB

MD5
ab0d82166dbd474db07af3d11e66ff00

SHA1
ed40cca40ae6f942533f3389d27201a39f47b4f0

SHA256
6a53793e1071b0b0425bc2b672f69a3035ea67493aa12a0284e3dde2732b16cc

SHA512
f805df3fb06932d111e0ed49c5edf4bbc78a4a8327779385c5aa059ca9fd9289c5d717159b8425d5a15332c1c40355fed44d1ca915e3e6f354a5442d7125e19e

Download Submit
memory/468-107-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/468-113-0x0000000000050000-0x0000000000096000-memory.dmp

Filesize
280KB

Download
memory/468-99-0x0000000000050000-0x0000000000096000-memory.dmp

Filesize
280KB

Download
memory/468-97-0x0000000000050000-0x0000000000096000-memory.dmp

Filesize
280KB

Download
memory/468-101-0x0000000000050000-0x0000000000096000-memory.dmp

Filesize
280KB

Download
memory/468-111-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/468-106-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/468-110-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/468-108-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/468-109-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/468-100-0x0000000000050000-0x0000000000096000-memory.dmp

Filesize
280KB

Download
memory/1108-67-0x0000000001DB0000-0x0000000001DF6000-memory.dmp

Filesize
280KB

Download
memory/1108-66-0x0000000001DB0000-0x0000000001DF6000-memory.dmp

Filesize
280KB

Download
memory/1108-65-0x0000000001DB0000-0x0000000001DF6000-memory.dmp

Filesize
280KB

Download
memory/1108-64-0x0000000001DB0000-0x0000000001DF6000-memory.dmp

Filesize
280KB

Download
memory/1108-62-0x0000000001DB0000-0x0000000001DF6000-memory.dmp

Filesize
280KB

Download
memory/1180-70-0x0000000001B00000-0x0000000001B46000-memory.dmp

Filesize
280KB

Download
memory/1180-73-0x0000000001B00000-0x0000000001B46000-memory.dmp

Filesize
280KB

Download
memory/1180-71-0x0000000001B00000-0x0000000001B46000-memory.dmp

Filesize
280KB

Download
memory/1180-72-0x0000000001B00000-0x0000000001B46000-memory.dmp

Filesize
280KB

Download
memory/1224-81-0x00000000002A0000-0x00000000002E6000-memory.dmp

Filesize
280KB

Download
memory/1224-88-0x0000000001F30000-0x0000000001F76000-memory.dmp

Filesize
280KB

Download
memory/1224-89-0x0000000001F30000-0x0000000001F76000-memory.dmp

Filesize
280KB

Download
memory/1224-90-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1224-91-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1224-92-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1224-93-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1224-94-0x000000006FFF0000-0x0000000070000000-memory.dmp

Filesize
64KB

Download
memory/1224-83-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1224-55-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1224-56-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1224-54-0x0000000076711000-0x0000000076713000-memory.dmp

Filesize
8KB

Download
memory/1224-84-0x0000000001F30000-0x0000000001F76000-memory.dmp

Filesize
280KB

Download
memory/1224-103-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/1224-104-0x0000000001F30000-0x0000000001F76000-memory.dmp

Filesize
280KB

Download
memory/1224-86-0x0000000001F30000-0x0000000001F76000-memory.dmp

Filesize
280KB

Download
memory/1232-76-0x0000000002110000-0x0000000002156000-memory.dmp

Filesize
280KB

Download
memory/1232-77-0x0000000002110000-0x0000000002156000-memory.dmp

Filesize
280KB

Download
memory/1232-78-0x0000000002110000-0x0000000002156000-memory.dmp

Filesize
280KB

Download
memory/1232-79-0x0000000002110000-0x0000000002156000-memory.dmp

Filesize
280KB

Download
memory/1728-87-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1728-85-0x00000000006C0000-0x0000000000706000-memory.dmp

Filesize
280KB

Download
memory/1728-114-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download