e54c58a42bd491658cf9e384629065560208f8d26bc08012e94059dbf0f7d115

Analysis

max time kernel
3s
max time network
71s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
24-01-2024 00:58

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General

Target

2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe
Size

33KB
MD5

f85e6265972e576a2b3ecae32f80e926
SHA1

954d83977a2a048bed1ff5b2a7e5bfdd0dc94db2
SHA256

e54c58a42bd491658cf9e384629065560208f8d26bc08012e94059dbf0f7d115
SHA512

c54e6a2736e4f546390537f42d03321f89792251ce26074eb0ff78ed360e2d4e1dc23fe7afc8c7c352e2b3aab25d41166de1e188fe5d7f8d1efd12114a16af5e
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZxZ:b/yC4GyNM01GuQMNXw2PSj1PPZ

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000a00000001393e-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1764	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1924	2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1924	2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe
1764	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1924 wrote to memory of 1764	1924	2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe	28
PID 1924 wrote to memory of 1764	1924	2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe	28
PID 1924 wrote to memory of 1764	1924	2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe	28
PID 1924 wrote to memory of 1764	1924	2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-24_f85e6265972e576a2b3ecae32f80e926_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1924
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:1764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
33KB

MD5
0f36dce19604f44c116206e4be7abf49

SHA1
43e045b3a0e65fd3c9d427777b8960d8c265561b

SHA256
026b69ccf59b165b5b178d7d9f1e07108afe234543aff47f88e719e1ab3f55f2

SHA512
a7c8564f763cd9a60fc53f57d383b980f24a52c7814b54c41264281b316f1de8484b895912b30cb117daf1292d5a1d5ee31802c37b6967fcd1220707fcd6aa6a

Download Submit
memory/1764-23-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1924-0-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1924-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1924-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download