802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888

General

Target

802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe
Size

11KB
MD5

5a77d3ca7d0da0233d9793726973b176
SHA1

e39a363368e17d5fc4b5fb11c4fb6e5827d38a12
SHA256

802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888
SHA512

92eded682622660b7da3187309c8b6729bd87ecd782f0ea0086f28d6ca62b208666fb6d785d521acd59b2418ec5c8e23802c805b00d4d885e75dc5a8197a1b98
SSDEEP

192:9MAQZQ5NyJKGn/bA44fkqvt4xd+kh6n8tyuAhO9Bmr0tWp5+WrE:9XQZQ5dWxd+38tyZOSr0Wp5+WI

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
268	gemuas.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x0008000000005c51-56.dat	upx
behavioral1/memory/1672-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/files/0x0008000000005c51-62.dat	upx
behavioral1/memory/268-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/268-63-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Deletes itself 1 IoCs

pid	Process
1692	cmd.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\gemuas.exe	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe
File opened for modification	C:\Windows\SysWOW64\gemuas.exe	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	gemuas.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	gemuas.exe

Kills process with taskkill 2 IoCs

evasion

pid	Process
1720	taskkill.exe
552	taskkill.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe
Token: SeDebugPrivilege	552	taskkill.exe
Token: SeDebugPrivilege	1720	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1720	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe	27
PID 1672 wrote to memory of 1720	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe	27
PID 1672 wrote to memory of 1720	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe	27
PID 1672 wrote to memory of 1720	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe	27
PID 268 wrote to memory of 552	268	gemuas.exe	30
PID 268 wrote to memory of 552	268	gemuas.exe	30
PID 268 wrote to memory of 552	268	gemuas.exe	30
PID 268 wrote to memory of 552	268	gemuas.exe	30
PID 1672 wrote to memory of 1692	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe	32
PID 1672 wrote to memory of 1692	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe	32
PID 1672 wrote to memory of 1692	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe	32
PID 1672 wrote to memory of 1692	1672	802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe	32

C:\Users\Admin\AppData\Local\Temp\802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe
"C:\Users\Admin\AppData\Local\Temp\802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Windows\SysWOW64\taskkill.exe
  taskkill /f /t /im KSafeTray.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:1720
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\802674~1.EXE > nul
  2⤵
  - Deletes itself
  PID:1692

C:\Windows\SysWOW64\gemuas.exe
C:\Windows\SysWOW64\gemuas.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:268
- C:\Windows\SysWOW64\taskkill.exe
  taskkill /f /t /im KSafeTray.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:552

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\gemuas.exe

Filesize
11KB

MD5
5a77d3ca7d0da0233d9793726973b176

SHA1
e39a363368e17d5fc4b5fb11c4fb6e5827d38a12

SHA256
802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888

SHA512
92eded682622660b7da3187309c8b6729bd87ecd782f0ea0086f28d6ca62b208666fb6d785d521acd59b2418ec5c8e23802c805b00d4d885e75dc5a8197a1b98

Download Submit
C:\Windows\SysWOW64\gemuas.exe

Filesize
11KB

MD5
5a77d3ca7d0da0233d9793726973b176

SHA1
e39a363368e17d5fc4b5fb11c4fb6e5827d38a12

SHA256
802674478091c8a60d864f2764b1120083954a2f3d89c0973217ab75c5387888

SHA512
92eded682622660b7da3187309c8b6729bd87ecd782f0ea0086f28d6ca62b208666fb6d785d521acd59b2418ec5c8e23802c805b00d4d885e75dc5a8197a1b98

Download Submit
memory/268-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/268-63-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1672-54-0x0000000075111000-0x0000000075113000-memory.dmp

Filesize
8KB

Download
memory/1672-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

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