43f33ebf187b9f3a986934d320e84df8e6da4e90c68c6928a778309fada53db4

General

Target

letter.txt .exe
Size

29KB
MD5

0af3e56a2b63cf3eadbc06d351f6d6bf
SHA1

f67bd0030a6b2f5fd3eeaa4d5404fcde67cffe91
SHA256

43f33ebf187b9f3a986934d320e84df8e6da4e90c68c6928a778309fada53db4
SHA512

dbdf4027b64d8b2a50bcf25656e3ea049575e7ef7c2a67bd1e4f163e5a4c69c117cc7bdaf0dd7653a026cace4fd1a73519d9c0352621afcfdb0fb24a0a271570
SSDEEP

768:AEwHupU99d2JE0jNJJ83+8zzqgTdVY9/DZ:AEwVs+0jNDY1qi/q1

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3068	services.exe

UPX packed file 25 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3004-0-0x0000000000500000-0x0000000000510200-memory.dmp	upx
behavioral1/memory/3004-4-0x0000000000220000-0x0000000000228000-memory.dmp	upx
behavioral1/files/0x000d000000018b54-7.dat	upx
behavioral1/memory/3068-11-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3004-17-0x0000000000500000-0x0000000000510200-memory.dmp	upx
behavioral1/memory/3068-18-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3068-23-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3068-29-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3068-31-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3068-36-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3068-41-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3068-43-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3004-47-0x0000000000500000-0x0000000000510200-memory.dmp	upx
behavioral1/memory/3068-48-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3068-53-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/files/0x0007000000018bd4-63.dat	upx
behavioral1/memory/3004-71-0x0000000000500000-0x0000000000510200-memory.dmp	upx
behavioral1/memory/3068-72-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3004-75-0x0000000000500000-0x0000000000510200-memory.dmp	upx
behavioral1/memory/3068-76-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3004-80-0x0000000000500000-0x0000000000510200-memory.dmp	upx
behavioral1/memory/3068-81-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3068-83-0x0000000000400000-0x0000000000408000-memory.dmp	upx
behavioral1/memory/3004-87-0x0000000000500000-0x0000000000510200-memory.dmp	upx
behavioral1/memory/3068-88-0x0000000000400000-0x0000000000408000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Services = "C:\\Windows\\services.exe"	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\JavaVM = "C:\\Windows\\java.exe"	letter.txt .exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\services.exe	letter.txt .exe
File opened for modification	C:\Windows\java.exe	letter.txt .exe
File created	C:\Windows\java.exe	letter.txt .exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 3068	3004	letter.txt .exe	29
PID 3004 wrote to memory of 3068	3004	letter.txt .exe	29
PID 3004 wrote to memory of 3068	3004	letter.txt .exe	29
PID 3004 wrote to memory of 3068	3004	letter.txt .exe	29

C:\Users\Admin\AppData\Local\Temp\letter.txt .exe
"C:\Users\Admin\AppData\Local\Temp\letter.txt .exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\services.exe
  "C:\Windows\services.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  PID:3068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2177.tmp

Filesize
29KB

MD5
073533b2411a987e4e8ac20329820bbc

SHA1
524ac86f1902cb5dda2d5fce24e964d8924e8099

SHA256
e0e123a52b71f8253efa6d59cfaec622c0b8914bcbf3f200e8eba4adc260a977

SHA512
c2e150ba21e724715b0edff21200567d8c1fffefa3a6617af6b10eff6c2e9c25021208fb94b4b90af766fd5c2c9b587b3a0f360f31e28290a03bbb66c94bb527

Download Submit
C:\Users\Admin\AppData\Local\Temp\zincite.log

Filesize
384B

MD5
7e8bf0dce3fda25141b8af1b889d512b

SHA1
037a0794b6dac32034ddd75db383d74ea69ba561

SHA256
c004bcc4523e6c4ed860ae4ed418bb3d6b3329368caad9d51cb777d9b11a3373

SHA512
1dc724f09e0e587c4e11d5de0cffd263a0035ddc49847859241337488808cfa2966fda318e013fba600d85f51ad8c2ad234a8ee022b41bd728e0afda8b15ee11

Download Submit
C:\Windows\services.exe

Filesize
8KB

MD5
b0fe74719b1b647e2056641931907f4a

SHA1
e858c206d2d1542a79936cb00d85da853bfc95e2

SHA256
bf316f51d0c345d61eaee3940791b64e81f676e3bca42bad61073227bee6653c

SHA512
9c82e88264696d0dadef9c0442ad8d1183e48f0fb355a4fc9bf4fa5db4e27745039f98b1fd1febff620a5ded6dd493227f00d7d2e74b19757685aa8655f921c2

Download Submit
memory/3004-17-0x0000000000500000-0x0000000000510200-memory.dmp

Filesize
64KB

Download
memory/3004-10-0x0000000000220000-0x0000000000228000-memory.dmp

Filesize
32KB

Download
memory/3004-0-0x0000000000500000-0x0000000000510200-memory.dmp

Filesize
64KB

Download
memory/3004-80-0x0000000000500000-0x0000000000510200-memory.dmp

Filesize
64KB

Download
memory/3004-75-0x0000000000500000-0x0000000000510200-memory.dmp

Filesize
64KB

Download
memory/3004-24-0x0000000000220000-0x0000000000228000-memory.dmp

Filesize
32KB

Download
memory/3004-71-0x0000000000500000-0x0000000000510200-memory.dmp

Filesize
64KB

Download
memory/3004-87-0x0000000000500000-0x0000000000510200-memory.dmp

Filesize
64KB

Download
memory/3004-4-0x0000000000220000-0x0000000000228000-memory.dmp

Filesize
32KB

Download
memory/3004-47-0x0000000000500000-0x0000000000510200-memory.dmp

Filesize
64KB

Download
memory/3068-43-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-72-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-48-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-53-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-36-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-31-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-29-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-41-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-23-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-76-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-18-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-81-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-83-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-11-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download
memory/3068-88-0x0000000000400000-0x0000000000408000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads