bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e

General

Target

bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe
Size

356KB
MD5

56bea14a8aa030c2833064841b1e49c4
SHA1

89dc8a1e36b5b0c42b08b7bdf82a0a0ccd5eb35d
SHA256

bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e
SHA512

654ee9568acae59601b6880b2a0c34460ab7934a808b621567f79f1500dcec531852916d308ecce7c70aada1b6a1b2a6eafd26c7836a2ca90cfb528d3b068fe7
SSDEEP

6144:TNXJz6ZQw9FsL57G2/+C+7VXfhSoSWmTh7dnc4z4Q/IueNfn1g5Tzz:ZZzQps7G2/j+BX+W8JnX0buehK5/z

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

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\AAIZ = "C:\\Windows\\SysWOW64\\autochka.exe"	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1120	autochka.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	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe

Deletes itself 1 IoCs

pid	Process
1632	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe
1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.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	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\autochka.exe	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe
File opened for modification	C:\Windows\SysWOW64\autochka.exe	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe

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

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command-Line Interface

T1059

pid	Process
1804	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe
1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1120	autochka.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 1120	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe	30
PID 1752 wrote to memory of 1120	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe	30
PID 1752 wrote to memory of 1120	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe	30
PID 1752 wrote to memory of 1120	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe	30
PID 1752 wrote to memory of 1632	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe	33
PID 1752 wrote to memory of 1632	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe	33
PID 1752 wrote to memory of 1632	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe	33
PID 1752 wrote to memory of 1632	1752	bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe	33
PID 1120 wrote to memory of 1804	1120	autochka.exe	34
PID 1120 wrote to memory of 1804	1120	autochka.exe	34
PID 1120 wrote to memory of 1804	1120	autochka.exe	34
PID 1120 wrote to memory of 1804	1120	autochka.exe	34

C:\Users\Admin\AppData\Local\Temp\bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe
"C:\Users\Admin\AppData\Local\Temp\bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.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
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1752
- C:\Windows\SysWOW64\autochka.exe
  C:\Windows\SysWOW64\autochka.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1120
- - C:\Windows\SysWOW64\ipconfig.exe
    "C:\Windows\system32\ipconfig.exe" /flushdns
    3⤵
    - Gathers network information
    PID:1804
- C:\Windows\SysWOW64\cmd.exe
  /c C:\Users\Admin\AppData\Local\Temp\~unins588.bat "C:\Users\Admin\AppData\Local\Temp\bc3f97e08fc70c5e7663cdcc380bcf7ae0a2b81e5cd6b9907f5f7a8f49cdb86e.exe"
  2⤵
  - Deletes itself
  PID:1632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\~unins588.bat

Filesize
49B

MD5
9e0a2f5ab30517809b95a1ff1dd98c53

SHA1
5c1eefdf10e67d1e9216e2e3f5e92352d583c9ce

SHA256
97ac9fee75a1f7b63b3115e9c4fb9dda80b1caba26d2fb51325670dee261fe32

SHA512
e959cc1fd48fb1cccf135a697924c775a3812bab211fc7f9b00c5a9d617261d84c5d6f7cb548774c1e8f46811b06ca39c5603d0e10cbcb7b805f9abbe49b9b42

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

Filesize
104KB

MD5
728f4ec031cd7e26159214fa90532d2e

SHA1
76e5c78671081a090850d3d8f52e61bc490e36b6

SHA256
2dba60701f65472b67e558d5336f292644948bb6c59f156fc04b5ff5d169c5fe

SHA512
050d87cfb15358fb54b963fe0da145e13ac2ff3fa2affe5098c236728d5fe9cd4375a11762aa01d64760218490d8a7e99a2c783acc0fcd39d29d5e63af23b72a

Download Submit
\Windows\SysWOW64\autochka.exe

Filesize
104KB

MD5
728f4ec031cd7e26159214fa90532d2e

SHA1
76e5c78671081a090850d3d8f52e61bc490e36b6

SHA256
2dba60701f65472b67e558d5336f292644948bb6c59f156fc04b5ff5d169c5fe

SHA512
050d87cfb15358fb54b963fe0da145e13ac2ff3fa2affe5098c236728d5fe9cd4375a11762aa01d64760218490d8a7e99a2c783acc0fcd39d29d5e63af23b72a

Download Submit
\Windows\SysWOW64\autochka.exe

Filesize
104KB

MD5
728f4ec031cd7e26159214fa90532d2e

SHA1
76e5c78671081a090850d3d8f52e61bc490e36b6

SHA256
2dba60701f65472b67e558d5336f292644948bb6c59f156fc04b5ff5d169c5fe

SHA512
050d87cfb15358fb54b963fe0da145e13ac2ff3fa2affe5098c236728d5fe9cd4375a11762aa01d64760218490d8a7e99a2c783acc0fcd39d29d5e63af23b72a

Download Submit
memory/1120-65-0x0000000000401000-0x0000000000403000-memory.dmp

Filesize
8KB

Download
memory/1752-54-0x0000000000400000-0x000000000049D000-memory.dmp

Filesize
628KB

Download
memory/1752-55-0x0000000076261000-0x0000000076263000-memory.dmp

Filesize
8KB

Download
memory/1752-56-0x0000000000220000-0x00000000002AF000-memory.dmp

Filesize
572KB

Download
memory/1752-60-0x0000000000400000-0x000000000049D000-memory.dmp

Filesize
628KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads