eb27a88f8463de21738a4b1e624b9fd0c882f7d9207cb1346e6297960cfb0cae

General

Target

2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe
Size

5.5MB
MD5

f5d07a6fe867476e0fa191cb58871661
SHA1

0fdc4797214a9a5fed3edd45c28475f95df06482
SHA256

eb27a88f8463de21738a4b1e624b9fd0c882f7d9207cb1346e6297960cfb0cae
SHA512

d44c29dcf7ec70aad03e6be199d2e58106852bf94c427ad1176a629bc14b26d332f94f2ac594e4d8ca9a890411cb4f0d7b60845da8c283a16d16e30fddce7225
SSDEEP

98304:tGiPCjI9nGdFD8nBHm/lOs4HucAmD/YpJJRsH9KsUbIP8Z/AzdKfeT1:fP7aa3uzmD/IJR09KbMPkT01

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 10 IoCs

resource	yara_rule
behavioral2/memory/4532-0-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4532-1-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4532-3-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0004000000022ea3-16.dat	CryptoLocker_rule2
behavioral2/files/0x0004000000022ea3-18.dat	CryptoLocker_rule2
behavioral2/files/0x0004000000022ea3-19.dat	CryptoLocker_rule2
behavioral2/memory/4532-20-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4980-21-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4980-23-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4980-32-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral2/memory/4532-1-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4532-3-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4532-20-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4980-21-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4980-23-0x0000000000500000-0x0000000000D88000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4980-32-0x0000000000500000-0x0000000000D88000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4980	misid.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4532	2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe
4532	2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe
4980	misid.exe
4980	misid.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4532 wrote to memory of 4980	4532	2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe	99
PID 4532 wrote to memory of 4980	4532	2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe	99
PID 4532 wrote to memory of 4980	4532	2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_f5d07a6fe867476e0fa191cb58871661_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4532
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  PID:4980

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3300 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:4088

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
2.6MB

MD5
e46f0090c8db9ede70f4b2b5aa998721

SHA1
54bd5363606ba146e7465d95ed086bd9bc175699

SHA256
c6a143a824118e2db74ddb91c0c2559f6c472262bc59b19acf1dd2ce0633b7f2

SHA512
50ae61eaea324c5f7e9a6450bf1dba0b3abfa8931bbe31d103181459204012050748908cdd7a31743346446eabc6526aed18105797f34ae529e13b1578148af1

Download Submit
C:\Users\Admin\AppData\Local\Temp\misid.exe

Filesize
896KB

MD5
4b3989f705fe45760f626555583fbf49

SHA1
9c523a92dda10bc5c02b3d1b18b61ab7c0e1cfe6

SHA256
2e4c11af5e45eb9054aa29be9e8f3feac436d72da39cd3b58f865bd37ee007aa

SHA512
9169dd2c58b5b985a473b26c15eae5f274384e801d3f303c794be6d6875cbe0ebaca93a1787d5837b07faa1c79c42b430b31345baf9de1bb55e6f4ae43e7e37f

Download Submit
C:\Users\Admin\AppData\Local\Temp\misid.exe

Filesize
405KB

MD5
695734a4474d049b436e1beded45d9c2

SHA1
9481cf98fe7e0c12b8e519ac42c496e818266158

SHA256
14fb8567a7d95c460d12ff3aa1b3b49704c14640afe79b3b8a85f245dc9328ae

SHA512
3f6b8c35c87f930da5ce1a30d3ac83b143b2ada90be4457a728ce719be3b4e78d223501020c679a3873211e94bccc1a873ac19242764471d2d76a5106632b1f8

Download Submit
memory/4532-4-0x0000000002960000-0x0000000002966000-memory.dmp

Filesize
24KB

Download
memory/4532-20-0x0000000000500000-0x0000000000D88000-memory.dmp

Filesize
8.5MB

Download
memory/4532-5-0x0000000002960000-0x0000000002966000-memory.dmp

Filesize
24KB

Download
memory/4532-6-0x0000000002980000-0x0000000002986000-memory.dmp

Filesize
24KB

Download
memory/4532-3-0x0000000000500000-0x0000000000D88000-memory.dmp

Filesize
8.5MB

Download
memory/4532-2-0x00000000004F0000-0x00000000004F1000-memory.dmp

Filesize
4KB

Download
memory/4532-1-0x0000000000500000-0x0000000000D88000-memory.dmp

Filesize
8.5MB

Download
memory/4532-0-0x0000000000500000-0x0000000000D88000-memory.dmp

Filesize
8.5MB

Download
memory/4980-21-0x0000000000500000-0x0000000000D88000-memory.dmp

Filesize
8.5MB

Download
memory/4980-22-0x0000000000450000-0x0000000000451000-memory.dmp

Filesize
4KB

Download
memory/4980-23-0x0000000000500000-0x0000000000D88000-memory.dmp

Filesize
8.5MB

Download
memory/4980-25-0x0000000000E30000-0x0000000000E36000-memory.dmp

Filesize
24KB

Download
memory/4980-27-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4980-32-0x0000000000500000-0x0000000000D88000-memory.dmp

Filesize
8.5MB

Download

Analysis

Sharing