376b86e795ac22f7c439a3fbb6e2560149942b684a0f883830b60e679643741c

General

Target

76729bdc81b2f53f91101e607a21ba13.exe
Size

229KB
MD5

76729bdc81b2f53f91101e607a21ba13
SHA1

1518a5b5e536af83cccacae98de4ede65dca9769
SHA256

376b86e795ac22f7c439a3fbb6e2560149942b684a0f883830b60e679643741c
SHA512

9230b594b0515a25a0eea1e3e3945c3d5433414beebfff32f5f974e7bf65789650105a63fd3f530a9a21a812a976508c988af26199e7534a1576d2dec79c0b0d
SSDEEP

6144:XD55IvaE8HE4eWMtKKi6r0AByEV1q6tf5I:Xp9/T6r0AzTdf

Score

8^/10

discovery evasion persistence trojan upx

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Fwixrggeh = "C:\\Windows\\SysWOW64\\dsreg3.exe"	76729bdc81b2f53f91101e607a21ba13.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	76729bdc81b2f53f91101e607a21ba13.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	76729bdc81b2f53f91101e607a21ba13.exe

Executes dropped EXE 1 IoCs

pid	Process
5028	dsreg3.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1464-4-0x0000000000510000-0x00000000005A0000-memory.dmp	upx
behavioral2/memory/1464-7-0x0000000000510000-0x00000000005A0000-memory.dmp	upx
behavioral2/memory/1464-6-0x0000000000510000-0x00000000005A0000-memory.dmp	upx
behavioral2/memory/1464-5-0x0000000000510000-0x00000000005A0000-memory.dmp	upx
behavioral2/memory/1464-1-0x0000000000510000-0x00000000005A0000-memory.dmp	upx
behavioral2/memory/1464-20-0x0000000000510000-0x00000000005A0000-memory.dmp	upx

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	76729bdc81b2f53f91101e607a21ba13.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\dsreg3.exe	76729bdc81b2f53f91101e607a21ba13.exe
File opened for modification	C:\Windows\SysWOW64\dsreg3.exe	76729bdc81b2f53f91101e607a21ba13.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
2208	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1464	76729bdc81b2f53f91101e607a21ba13.exe
1464	76729bdc81b2f53f91101e607a21ba13.exe
1464	76729bdc81b2f53f91101e607a21ba13.exe
1464	76729bdc81b2f53f91101e607a21ba13.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1464	76729bdc81b2f53f91101e607a21ba13.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1464 wrote to memory of 5028	1464	76729bdc81b2f53f91101e607a21ba13.exe	99
PID 1464 wrote to memory of 5028	1464	76729bdc81b2f53f91101e607a21ba13.exe	99
PID 1464 wrote to memory of 5028	1464	76729bdc81b2f53f91101e607a21ba13.exe	99

C:\Users\Admin\AppData\Local\Temp\76729bdc81b2f53f91101e607a21ba13.exe
"C:\Users\Admin\AppData\Local\Temp\76729bdc81b2f53f91101e607a21ba13.exe"
1⤵
- Adds policy Run key to start application
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Windows\SysWOW64\cmd.exe
  /c C:\Users\Admin\AppData\Local\Temp\~unins7546.bat "C:\Users\Admin\AppData\Local\Temp\76729bdc81b2f53f91101e607a21ba13.exe"
  2⤵
  PID:3252
- C:\Windows\SysWOW64\dsreg3.exe
  C:\Windows\SysWOW64\dsreg3.exe
  2⤵
  - Executes dropped EXE
  PID:5028

C:\Windows\SysWOW64\ipconfig.exe
"C:\Windows\system32\ipconfig.exe" /flushdns
1⤵
- Gathers network information
PID:2208

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

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1464-0-0x00000000001C0000-0x00000000001ED000-memory.dmp

Filesize
180KB

Download
memory/1464-4-0x0000000000510000-0x00000000005A0000-memory.dmp

Filesize
576KB

Download
memory/1464-8-0x0000000000770000-0x0000000000771000-memory.dmp

Filesize
4KB

Download
memory/1464-7-0x0000000000510000-0x00000000005A0000-memory.dmp

Filesize
576KB

Download
memory/1464-6-0x0000000000510000-0x00000000005A0000-memory.dmp

Filesize
576KB

Download
memory/1464-5-0x0000000000510000-0x00000000005A0000-memory.dmp

Filesize
576KB

Download
memory/1464-1-0x0000000000510000-0x00000000005A0000-memory.dmp

Filesize
576KB

Download
memory/1464-20-0x0000000000510000-0x00000000005A0000-memory.dmp

Filesize
576KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads