aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e

General

Target

aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe
Size

37KB
MD5

912b029db38e6c13682fb923da759462
SHA1

a1f5c7fdd750fc39536308c1e54c23ab91e355eb
SHA256

aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e
SHA512

27ccecf84deb83ca2fd397d6050cd5b6c003fe23cb2c7a0a8db296cb54f7bda6e190aaa5f96e017ab2221218e568447df34ec0670cc2d59f64849d591554a4aa
SSDEEP

768:jpuxbbb93pfzxWt7QYQ8IgDidhHPjAJYvHF0lwY437avXKrnr7:j0Rbb5WRQYt9ir/2wrao

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2028	BCSSync.exe
892	BCSSync.exe

Loads dropped DLL 2 IoCs

pid	Process
944	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe
944	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe

Unexpected DNS network traffic destination 8 IoCs

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

description	ioc
Destination IP	50.7.247.251
Destination IP	50.7.247.251
Destination IP	50.7.247.251
Destination IP	50.7.247.251
Destination IP	50.7.247.251
Destination IP	50.7.247.251
Destination IP	50.7.247.251
Destination IP	50.7.247.251

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1936 set thread context of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 2028 set thread context of 892	2028	BCSSync.exe	30

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Fonts\8k2o44.com	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
892	BCSSync.exe
944	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 1936 wrote to memory of 944	1936	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	28
PID 944 wrote to memory of 2028	944	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	29
PID 944 wrote to memory of 2028	944	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	29
PID 944 wrote to memory of 2028	944	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	29
PID 944 wrote to memory of 2028	944	aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe	29
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 2028 wrote to memory of 892	2028	BCSSync.exe	30
PID 892 wrote to memory of 1792	892	BCSSync.exe	31
PID 892 wrote to memory of 1792	892	BCSSync.exe	31
PID 892 wrote to memory of 1792	892	BCSSync.exe	31
PID 892 wrote to memory of 1792	892	BCSSync.exe	31

C:\Users\Admin\AppData\Local\Temp\aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe
"C:\Users\Admin\AppData\Local\Temp\aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Users\Admin\AppData\Local\Temp\aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe
  C:\Users\Admin\AppData\Local\Temp\aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:944
- - C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe
    "C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe" DEL:C:\Users\Admin\AppData\Local\Temp\aef9ef4061ea57a48f20b1685bec2475ecdcb090c412ce868fd1cc44894f1d2e.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2028
  - - C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe
      "C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      PID:892
    - - C:\Program Files (x86)\Microsoft Office\Office14\BCSSync .exe
        
        "C:\Program Files (x86)\Microsoft Office\Office14\BCSSync .exe" "C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe"
        5⤵
        
        PID:1792

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe

Filesize
37KB

MD5
86792c2214e2bcb660d5fdff639718f2

SHA1
d724076e62f9b37fb862546f36b4c2c69f583450

SHA256
a2c8396d17c255ab61977e89b0958a263cf458fca286399ee51b5d0e5ecdae89

SHA512
a829ecbbb4058fa8fbc53edb6edbf76efab2b157b7251277f93e33c07da19dd999cb5001e9554969a75aa0d160b373f7735ed77ce32ae86e7429826412a1d8a0

Download Submit
C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe

Filesize
37KB

MD5
86792c2214e2bcb660d5fdff639718f2

SHA1
d724076e62f9b37fb862546f36b4c2c69f583450

SHA256
a2c8396d17c255ab61977e89b0958a263cf458fca286399ee51b5d0e5ecdae89

SHA512
a829ecbbb4058fa8fbc53edb6edbf76efab2b157b7251277f93e33c07da19dd999cb5001e9554969a75aa0d160b373f7735ed77ce32ae86e7429826412a1d8a0

Download Submit
C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe

Filesize
37KB

MD5
86792c2214e2bcb660d5fdff639718f2

SHA1
d724076e62f9b37fb862546f36b4c2c69f583450

SHA256
a2c8396d17c255ab61977e89b0958a263cf458fca286399ee51b5d0e5ecdae89

SHA512
a829ecbbb4058fa8fbc53edb6edbf76efab2b157b7251277f93e33c07da19dd999cb5001e9554969a75aa0d160b373f7735ed77ce32ae86e7429826412a1d8a0

Download Submit
\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe

Filesize
37KB

MD5
86792c2214e2bcb660d5fdff639718f2

SHA1
d724076e62f9b37fb862546f36b4c2c69f583450

SHA256
a2c8396d17c255ab61977e89b0958a263cf458fca286399ee51b5d0e5ecdae89

SHA512
a829ecbbb4058fa8fbc53edb6edbf76efab2b157b7251277f93e33c07da19dd999cb5001e9554969a75aa0d160b373f7735ed77ce32ae86e7429826412a1d8a0

Download Submit
\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe

Filesize
37KB

MD5
86792c2214e2bcb660d5fdff639718f2

SHA1
d724076e62f9b37fb862546f36b4c2c69f583450

SHA256
a2c8396d17c255ab61977e89b0958a263cf458fca286399ee51b5d0e5ecdae89

SHA512
a829ecbbb4058fa8fbc53edb6edbf76efab2b157b7251277f93e33c07da19dd999cb5001e9554969a75aa0d160b373f7735ed77ce32ae86e7429826412a1d8a0

Download Submit
memory/892-88-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/892-86-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/892-80-0x0000000000403DD9-mapping.dmp

Download
memory/944-62-0x0000000000403DD9-mapping.dmp

Download
memory/944-90-0x00000000744D1000-0x00000000744D3000-memory.dmp

Filesize
8KB

Download
memory/944-66-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/944-64-0x0000000075FB1000-0x0000000075FB3000-memory.dmp

Filesize
8KB

Download
memory/944-65-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/944-61-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/944-56-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/944-55-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/944-60-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/944-59-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/944-58-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/944-85-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/1792-87-0x0000000000000000-mapping.dmp

Download
memory/1936-54-0x0000000000568000-0x0000000000579000-memory.dmp

Filesize
68KB

Download
memory/2028-69-0x0000000000000000-mapping.dmp

Download
memory/2028-71-0x00000000002D8000-0x00000000002E9000-memory.dmp

Filesize
68KB

Download

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