b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86

Analysis

max time kernel
152s
max time network
71s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
30/11/2022, 22:56

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General

Target

b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe
Size

88KB
MD5

308ef21bd1b49248577590c4a0f59d42
SHA1

f1c99bec326d62448a36e7a1a354ae494a6e86f6
SHA256

b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86
SHA512

c3eb9dfeed9773c841c6e27c3f2c4aa0804fec3020c801b88d9be64be87758e293e7024c65be65979b0d12428dfc84261eefe18c2e6e08b850d2192cf41a0469
SSDEEP

1536:FgWQMtWO1ljjFwQY/WvcbWjf4dy0gwonB1:FrH4O1l/FwQqWvAWD4dy0gwonB1

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
848	gemuas.exe

Deletes itself 1 IoCs

pid	Process
1364	cmd.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\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Windows\\system32\\gemuas.exe"	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\gemuas.exe	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe
File opened for modification	C:\Windows\SysWOW64\gemuas.exe	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1084	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1084 wrote to memory of 1364	1084	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe	28
PID 1084 wrote to memory of 1364	1084	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe	28
PID 1084 wrote to memory of 1364	1084	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe	28
PID 1084 wrote to memory of 1364	1084	b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe	28

C:\Users\Admin\AppData\Local\Temp\b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe
"C:\Users\Admin\AppData\Local\Temp\b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1084
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\B51F57~1.EXE > nul
  2⤵
  - Deletes itself
  PID:1364

C:\Windows\SysWOW64\gemuas.exe
C:\Windows\SysWOW64\gemuas.exe
1⤵
- Executes dropped EXE
PID:848

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:\Windows\SysWOW64\gemuas.exe

Filesize
88KB

MD5
308ef21bd1b49248577590c4a0f59d42

SHA1
f1c99bec326d62448a36e7a1a354ae494a6e86f6

SHA256
b51f57c4f49a4046349d7b1dced4af9a83ad901b10793fdda3ece1f7a5e2cc86

SHA512
c3eb9dfeed9773c841c6e27c3f2c4aa0804fec3020c801b88d9be64be87758e293e7024c65be65979b0d12428dfc84261eefe18c2e6e08b850d2192cf41a0469

Download Submit
memory/1084-54-0x0000000074C91000-0x0000000074C93000-memory.dmp

Filesize
8KB

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