67b059bd1eb166b8aa77519605a44d4a13963dc3a24aeac952726db5e315becd

General

Target

d3c072b721fbc0d53dd75e1e59238020N.exe
Size

358KB
MD5

d3c072b721fbc0d53dd75e1e59238020
SHA1

8a21b2eea085874c14554538cafbe1a99acaf10d
SHA256

67b059bd1eb166b8aa77519605a44d4a13963dc3a24aeac952726db5e315becd
SHA512

7580bddd6b8a1c21476fa79e1b1d530b5c55c2ae7437a74cac2ce4dec21b670aa170b9f0db1831650fbd72d17c541e3bcf449f2e9b8b59354821a84351b93a8d
SSDEEP

6144:XRobyqO195qa8gjAh+jq203vATD2NLDa48An2N2FSmksqtB9:XWbyqO19D8gjBjmukXx5pesqr9

Score

8^/10

discovery evasion persistence trojan

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	d3c072b721fbc0d53dd75e1e59238020N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\FQLXIZ = "C:\\Windows\\SysWOW64\\aaclientb.exe"	d3c072b721fbc0d53dd75e1e59238020N.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	aaclientb.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	d3c072b721fbc0d53dd75e1e59238020N.exe

Deletes itself 1 IoCs

pid	Process
2592	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2716	aaclientb.exe

Loads dropped DLL 2 IoCs

pid	Process
2084	d3c072b721fbc0d53dd75e1e59238020N.exe
2084	d3c072b721fbc0d53dd75e1e59238020N.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	d3c072b721fbc0d53dd75e1e59238020N.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\aaclientb.exe	d3c072b721fbc0d53dd75e1e59238020N.exe
File created	C:\Windows\SysWOW64\aaclientb.exe	d3c072b721fbc0d53dd75e1e59238020N.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d3c072b721fbc0d53dd75e1e59238020N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aaclientb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ipconfig.exe

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2200	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2084	d3c072b721fbc0d53dd75e1e59238020N.exe
2084	d3c072b721fbc0d53dd75e1e59238020N.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2084	d3c072b721fbc0d53dd75e1e59238020N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2716	aaclientb.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2716	2084	d3c072b721fbc0d53dd75e1e59238020N.exe	30
PID 2084 wrote to memory of 2716	2084	d3c072b721fbc0d53dd75e1e59238020N.exe	30
PID 2084 wrote to memory of 2716	2084	d3c072b721fbc0d53dd75e1e59238020N.exe	30
PID 2084 wrote to memory of 2716	2084	d3c072b721fbc0d53dd75e1e59238020N.exe	30
PID 2716 wrote to memory of 2200	2716	aaclientb.exe	32
PID 2716 wrote to memory of 2200	2716	aaclientb.exe	32
PID 2716 wrote to memory of 2200	2716	aaclientb.exe	32
PID 2716 wrote to memory of 2200	2716	aaclientb.exe	32
PID 2084 wrote to memory of 2592	2084	d3c072b721fbc0d53dd75e1e59238020N.exe	34
PID 2084 wrote to memory of 2592	2084	d3c072b721fbc0d53dd75e1e59238020N.exe	34
PID 2084 wrote to memory of 2592	2084	d3c072b721fbc0d53dd75e1e59238020N.exe	34
PID 2084 wrote to memory of 2592	2084	d3c072b721fbc0d53dd75e1e59238020N.exe	34

C:\Users\Admin\AppData\Local\Temp\d3c072b721fbc0d53dd75e1e59238020N.exe
"C:\Users\Admin\AppData\Local\Temp\d3c072b721fbc0d53dd75e1e59238020N.exe"
1⤵
- Adds policy Run key to start application
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\aaclientb.exe
  C:\Windows\SysWOW64\aaclientb.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Windows\SysWOW64\ipconfig.exe
    "C:\Windows\system32\ipconfig.exe" /flushdns
    3⤵
    - System Location Discovery: System Language Discovery
    - Gathers network information
    PID:2200
- C:\Windows\SysWOW64\cmd.exe
  /c C:\Users\Admin\AppData\Local\Temp\~unins176.bat "C:\Users\Admin\AppData\Local\Temp\d3c072b721fbc0d53dd75e1e59238020N.exe"
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

4

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\~unins176.bat

Filesize
49B

MD5
9e0a2f5ab30517809b95a1ff1dd98c53

SHA1
5c1eefdf10e67d1e9216e2e3f5e92352d583c9ce

SHA256
97ac9fee75a1f7b63b3115e9c4fb9dda80b1caba26d2fb51325670dee261fe32

SHA512
e959cc1fd48fb1cccf135a697924c775a3812bab211fc7f9b00c5a9d617261d84c5d6f7cb548774c1e8f46811b06ca39c5603d0e10cbcb7b805f9abbe49b9b42

Download Submit
\Windows\SysWOW64\aaclientb.exe

Filesize
104KB

MD5
476e102baeac3917dd6d44a58fd83bba

SHA1
c8c406ccc0c4134519e50656d8c8d1bb346949f2

SHA256
c1c900e1dce978f7d47a23fed43b9f4640d8f139f0c6e2cdfdc4720acffe7d84

SHA512
16b8235b35cd69fae76ad2a7411b70ee3e0c0f52f1e7b3a359fc20cd08fadf0b6f54c20330326c6233087b58dc46cfbaeb8d197a495de6cb10f140c55c7b5303

Download Submit
memory/2084-0-0x0000000000452000-0x000000000049F000-memory.dmp

Filesize
308KB

Download
memory/2084-1-0x0000000000350000-0x00000000003E6000-memory.dmp

Filesize
600KB

Download
memory/2084-5-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2084-24-0x0000000000452000-0x000000000049F000-memory.dmp

Filesize
308KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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