991cd470e36b51d3640eb6a1a40b6dbd54d2f82d6543fe38a46404bfc0a6bc76

Analysis

max time kernel
150s
max time network
152s
platform
windows7_x64
resource
win7v20210410
submitted
16/07/2021, 18:55

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General

Target
91dc35fa23a889bd9ef1e703e0f9eed7.exe
Size 1.3MB
Sample210716-ejg7y3rmdx
SHA256 991cd470e36b51d3640eb6a1a40b6dbd54d2f82d6543fe38a46404bfc0a6bc76
MD5 91dc35fa23a889bd9ef1e703e0f9eed7
SHA1 6491360291c65365333fad7ef0f6fa187913da72
SHA512 616b83af6359b6d913bad6d0789bbf0eac6cecbd36357d279f28ab73ccb5393ba6c52e5886356ec49c1dc984468e40caff830db8d15b5ff56bd585df09988b4e
MD5 SHA1 SHA512

Score

9^/10

discovery evasion spyware stealer

Malware Config

Signatures

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Downloads MZ/PE file
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 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	91dc35fa23a889bd9ef1e703e0f9eed7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	91dc35fa23a889bd9ef1e703e0f9eed7.exe

Deletes itself 1 IoCs

pid	Process
1584	cmd.exe

Loads dropped DLL 7 IoCs

pid	Process
556	91dc35fa23a889bd9ef1e703e0f9eed7.exe
556	91dc35fa23a889bd9ef1e703e0f9eed7.exe
556	91dc35fa23a889bd9ef1e703e0f9eed7.exe
556	91dc35fa23a889bd9ef1e703e0f9eed7.exe
556	91dc35fa23a889bd9ef1e703e0f9eed7.exe
556	91dc35fa23a889bd9ef1e703e0f9eed7.exe
556	91dc35fa23a889bd9ef1e703e0f9eed7.exe

Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	91dc35fa23a889bd9ef1e703e0f9eed7.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	91dc35fa23a889bd9ef1e703e0f9eed7.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1672 set thread context of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
624	timeout.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	91dc35fa23a889bd9ef1e703e0f9eed7.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	91dc35fa23a889bd9ef1e703e0f9eed7.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1660	powershell.exe
1660	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1660	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1660	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	29
PID 1672 wrote to memory of 1660	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	29
PID 1672 wrote to memory of 1660	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	29
PID 1672 wrote to memory of 1660	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	29
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 1672 wrote to memory of 556	1672	91dc35fa23a889bd9ef1e703e0f9eed7.exe	32
PID 556 wrote to memory of 1584	556	91dc35fa23a889bd9ef1e703e0f9eed7.exe	34
PID 556 wrote to memory of 1584	556	91dc35fa23a889bd9ef1e703e0f9eed7.exe	34
PID 556 wrote to memory of 1584	556	91dc35fa23a889bd9ef1e703e0f9eed7.exe	34
PID 556 wrote to memory of 1584	556	91dc35fa23a889bd9ef1e703e0f9eed7.exe	34
PID 1584 wrote to memory of 624	1584	cmd.exe	36
PID 1584 wrote to memory of 624	1584	cmd.exe	36
PID 1584 wrote to memory of 624	1584	cmd.exe	36
PID 1584 wrote to memory of 624	1584	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\91dc35fa23a889bd9ef1e703e0f9eed7.exe
"C:\Users\Admin\AppData\Local\Temp\91dc35fa23a889bd9ef1e703e0f9eed7.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\91dc35fa23a889bd9ef1e703e0f9eed7.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1660
- C:\Users\Admin\AppData\Local\Temp\91dc35fa23a889bd9ef1e703e0f9eed7.exe
  "C:\Users\Admin\AppData\Local\Temp\91dc35fa23a889bd9ef1e703e0f9eed7.exe"
  2⤵
  - Loads dropped DLL
  - Modifies system certificate store
  - Suspicious use of WriteProcessMemory
  PID:556
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\91dc35fa23a889bd9ef1e703e0f9eed7.exe"
    3⤵
    - Deletes itself
    - Suspicious use of WriteProcessMemory
    PID:1584
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /T 10 /NOBREAK
      4⤵
      Delays execution with timeout.exe
      PID:624

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

T1130

Modify Registry

T1112

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials in Files

T1081

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/556-73-0x0000000000400000-0x0000000000495000-memory.dmp

Download

memory/556-67-0x0000000000400000-0x0000000000495000-memory.dmp

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memory/1660-69-0x00000000009A0000-0x00000000009A1000-memory.dmp

Download

memory/1660-98-0x0000000006240000-0x0000000006241000-memory.dmp

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memory/1660-75-0x0000000002710000-0x0000000002711000-memory.dmp

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memory/1660-72-0x0000000002320000-0x0000000002F6A000-memory.dmp

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memory/1660-71-0x0000000004970000-0x0000000004971000-memory.dmp

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memory/1660-115-0x0000000006310000-0x0000000006311000-memory.dmp

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memory/1660-81-0x0000000005650000-0x0000000005651000-memory.dmp

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memory/1660-66-0x0000000075971000-0x0000000075973000-memory.dmp

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memory/1660-88-0x00000000056F0000-0x00000000056F1000-memory.dmp

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memory/1660-114-0x0000000006300000-0x0000000006301000-memory.dmp

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memory/1660-106-0x000000007EF30000-0x000000007EF31000-memory.dmp

Download

memory/1660-91-0x0000000006140000-0x0000000006141000-memory.dmp

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memory/1660-74-0x0000000000D40000-0x0000000000D41000-memory.dmp

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memory/1660-99-0x0000000005610000-0x0000000005611000-memory.dmp

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memory/1672-63-0x0000000007EB0000-0x0000000007F8B000-memory.dmp

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memory/1672-64-0x0000000005B40000-0x0000000005BD7000-memory.dmp

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memory/1672-59-0x0000000000290000-0x0000000000291000-memory.dmp

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memory/1672-62-0x0000000000210000-0x0000000000221000-memory.dmp

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memory/1672-61-0x0000000004930000-0x0000000004931000-memory.dmp

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