f55cfaa0c02ed95ddbe535e9dbe5cf1e4ce54e50c302ba754b0924e1e12fd844

Analysis

max time kernel
119s
max time network
122s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
30/05/2024, 04:00

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General

Target

2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe
Size

57KB
MD5

846aad0716e79d29ee5a7964e3e3df65
SHA1

82f7d9f5dc4bbd35c6b8987d2c61bef181b9f241
SHA256

f55cfaa0c02ed95ddbe535e9dbe5cf1e4ce54e50c302ba754b0924e1e12fd844
SHA512

4101c22e4c6b5bb7e4f5eb8c94ffd8382b314b4be284ff0aede1b5a7eb1ebf047665b84cc21215c9d1d6208ac199852547a16f6d61fe474f0f9d4ea28f2ebd43
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlggV:bP9g/xtCS3Dxx0C

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2828-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012289-11.dat	CryptoLocker_rule2
behavioral1/memory/2828-13-0x0000000000690000-0x000000000069E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2680-17-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral1/memory/2828-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral1/files/0x000a000000012289-11.dat	UPX
behavioral1/memory/2828-13-0x0000000000690000-0x000000000069E000-memory.dmp	UPX
behavioral1/memory/2680-17-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2680	gewos.exe

Loads dropped DLL 1 IoCs

pid	Process
2828	2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2828-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000a000000012289-11.dat	upx
behavioral1/memory/2828-13-0x0000000000690000-0x000000000069E000-memory.dmp	upx
behavioral1/memory/2680-17-0x0000000000400000-0x000000000040E000-memory.dmp	upx

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
2828	2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe
2680	gewos.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2828 wrote to memory of 2680	2828	2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe	28
PID 2828 wrote to memory of 2680	2828	2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe	28
PID 2828 wrote to memory of 2680	2828	2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe	28
PID 2828 wrote to memory of 2680	2828	2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_846aad0716e79d29ee5a7964e3e3df65_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
58KB

MD5
e6a1741c9684e37d7966724730c9b34a

SHA1
a46c773f038dce2dc6abebee15304a71fc49e5ec

SHA256
7490a2520b1e06649dfaad99bf97338f41db648905735c99e6ee2c9ca9237c9d

SHA512
1090a5247dd8fa129c629ffea94545bdd7350c5b89a31fccc566db1ea24c82095d91414ee3e85911e9d948e9ade311537677734ba0f3f55fbc6a0013f1a4900a

Download Submit
memory/2680-17-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2680-26-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download
memory/2828-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2828-1-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2828-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2828-9-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2828-13-0x0000000000690000-0x000000000069E000-memory.dmp

Filesize
56KB

Download