f107b4fba77dea5a9448a3c6521186ba6e24bc7f8cf3011cfbff52d430912f42

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 03:48

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General

Target

2024-06-05_b4b9947ead8ed33c123a4b826978ac9b_cryptolocker.exe
Size

37KB
MD5

b4b9947ead8ed33c123a4b826978ac9b
SHA1

82a5e709e3b1278e927c23be17a595dde8e92193
SHA256

f107b4fba77dea5a9448a3c6521186ba6e24bc7f8cf3011cfbff52d430912f42
SHA512

1f328f8a8ba3a7e84f48acede3e9e769618b079e81c6a13695fb2703699c8557b6f8ae15dc65e646a2ff07c869d51766fc80dd555a5d44d1ad4c482138291750
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLZ:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLZ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2816-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000232a4-13.dat	CryptoLocker_rule2
behavioral2/memory/2816-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2816-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000232a4-13.dat	CryptoLocker_set1
behavioral2/memory/2816-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-06-05_b4b9947ead8ed33c123a4b826978ac9b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4700	asih.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 4700	2816	2024-06-05_b4b9947ead8ed33c123a4b826978ac9b_cryptolocker.exe	83
PID 2816 wrote to memory of 4700	2816	2024-06-05_b4b9947ead8ed33c123a4b826978ac9b_cryptolocker.exe	83
PID 2816 wrote to memory of 4700	2816	2024-06-05_b4b9947ead8ed33c123a4b826978ac9b_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-05_b4b9947ead8ed33c123a4b826978ac9b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_b4b9947ead8ed33c123a4b826978ac9b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
37KB

MD5
a3b7f5f4b513274446682330907dd0ce

SHA1
fc9ba6c01ad38426ebc1353f573fde436e79bc97

SHA256
c882c78eeb3194972141c719bb419479b35d86735409bc1a16ff274b75c4656c

SHA512
9355380af290250790029cb49bae28ff8a7e617ae684d81aa94e6b0663c42587393fd448afd976dced6be079a846b817d33e58e789eece0c54d1cdad647fbc0b

Download Submit
memory/2816-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2816-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2816-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2816-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2816-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download