f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19

Analysis

max time kernel
125s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
04/12/2022, 10:47

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General

Target

f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe
Size

378KB
MD5

84024db2745e8bb754ce8ff3a99b53d8
SHA1

71ef6e78338dfd3a0b9bf4b15fd7f77ee0241009
SHA256

f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19
SHA512

da001c26b21748ed4fd5c319336526137451cac5927a6348ef616b5409413696a9a2fac3aeb3b34f180043312fb27d42971e16fa0b70c3c0d0a9a1d0907481c9
SSDEEP

6144:ceNU1uIJW3hVEckfSOBlWWRmGwL4QQgKKX8x7/2xWqWma2XDzHPt281:PyJmhVrpOjWtGNgDUiWqWNKDrt2

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3528	Sysremser.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{21E9C5D3-EBFF-11CD-B6FD-00AA00B4E22A}	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{21E9C5D3-EBFF-11CD-B6FD-00AA00B4E22A}\StubPath = "C:\\Program Files\\Sysremser.exe"	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3528 set thread context of 2080	3528	Sysremser.exe	82

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Sysremser.exe	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe
File created	C:\Program Files\Sysremser.exe	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings	explorer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4980	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe
Token: SeDebugPrivilege	3528	Sysremser.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4980 wrote to memory of 3528	4980	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe	81
PID 4980 wrote to memory of 3528	4980	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe	81
PID 4980 wrote to memory of 3528	4980	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe	81
PID 3528 wrote to memory of 2080	3528	Sysremser.exe	82
PID 3528 wrote to memory of 2080	3528	Sysremser.exe	82
PID 3528 wrote to memory of 2080	3528	Sysremser.exe	82
PID 4980 wrote to memory of 3360	4980	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe	83
PID 4980 wrote to memory of 3360	4980	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe	83
PID 4980 wrote to memory of 3360	4980	f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe	83

C:\Users\Admin\AppData\Local\Temp\f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe
"C:\Users\Admin\AppData\Local\Temp\f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe"
1⤵
- Modifies Installed Components in the registry
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4980
- C:\Program Files\Sysremser.exe
  "C:\Program Files\Sysremser.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3528
- - C:\Windows\explorer.exe
    C:\Windows\explorer.exe
    3⤵
    - Modifies registry class
    PID:2080
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c del "C:\Users\Admin\AppData\Local\Temp\f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19.exe"
  2⤵
  PID:3360

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:\Program Files\Sysremser.exe

Filesize
378KB

MD5
84024db2745e8bb754ce8ff3a99b53d8

SHA1
71ef6e78338dfd3a0b9bf4b15fd7f77ee0241009

SHA256
f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19

SHA512
da001c26b21748ed4fd5c319336526137451cac5927a6348ef616b5409413696a9a2fac3aeb3b34f180043312fb27d42971e16fa0b70c3c0d0a9a1d0907481c9

Download Submit
C:\Program Files\Sysremser.exe

Filesize
378KB

MD5
84024db2745e8bb754ce8ff3a99b53d8

SHA1
71ef6e78338dfd3a0b9bf4b15fd7f77ee0241009

SHA256
f9ffae051ea3b3adbc1ea3dc7904590cb0d60e17225dfa544ad5cdf1b8e64b19

SHA512
da001c26b21748ed4fd5c319336526137451cac5927a6348ef616b5409413696a9a2fac3aeb3b34f180043312fb27d42971e16fa0b70c3c0d0a9a1d0907481c9

Download Submit
memory/2080-139-0x0000000010000000-0x0000000010167000-memory.dmp

Filesize
1.4MB

Download
memory/3528-137-0x0000000010000000-0x0000000010167000-memory.dmp

Filesize
1.4MB

Download
memory/3528-141-0x0000000010000000-0x0000000010167000-memory.dmp

Filesize
1.4MB

Download
memory/4980-132-0x0000000010000000-0x0000000010167000-memory.dmp

Filesize
1.4MB

Download
memory/4980-133-0x0000000010000000-0x0000000010167000-memory.dmp

Filesize
1.4MB

Download
memory/4980-142-0x0000000010000000-0x0000000010167000-memory.dmp

Filesize
1.4MB

Download