e18fe4e8ccd8ff75cdf5f1d3898cd619c6acf2962861330d68c20063348f91be

Analysis

max time kernel
2s
max time network
81s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 23:01

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General

Target

1f48f7476196b627424e99bd12dd8411.exe
Size

491KB
MD5

1f48f7476196b627424e99bd12dd8411
SHA1

0721699e3b0a6a3dea9aaa9204241f95e507a1c9
SHA256

e18fe4e8ccd8ff75cdf5f1d3898cd619c6acf2962861330d68c20063348f91be
SHA512

f9ad7cec7b8adf1780ea033f31794a5fe98fb2bc6f808b92a09dc7f73aeeab2f57fbe9815366247af3e25e0bf03bbcba94c891cda2263b997ed225b75fba2fb3
SSDEEP

12288:nKoXeB05oIqEuTrYeCMcp2ieKlrOCN6dZwfiE9:nK2eB0OVrfYeCMpie2S3m

Score

7^/10

upx

Malware Config

Signatures

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1204-0-0x0000000000400000-0x000000000055E000-memory.dmp	upx
behavioral2/memory/1204-109-0x0000000000400000-0x000000000055E000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\inf\winupgrade.exe	1f48f7476196b627424e99bd12dd8411.exe
File opened for modification	C:\Windows\inf\winupgrade.exe	1f48f7476196b627424e99bd12dd8411.exe

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

System Information Discovery
T1082
Runs net.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe
1204	1f48f7476196b627424e99bd12dd8411.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1204 wrote to memory of 3128	1204	1f48f7476196b627424e99bd12dd8411.exe	21
PID 1204 wrote to memory of 3128	1204	1f48f7476196b627424e99bd12dd8411.exe	21
PID 1204 wrote to memory of 3128	1204	1f48f7476196b627424e99bd12dd8411.exe	21
PID 3128 wrote to memory of 4456	3128	net.exe	20
PID 3128 wrote to memory of 4456	3128	net.exe	20
PID 3128 wrote to memory of 4456	3128	net.exe	20
PID 1204 wrote to memory of 2324	1204	1f48f7476196b627424e99bd12dd8411.exe	39
PID 1204 wrote to memory of 2324	1204	1f48f7476196b627424e99bd12dd8411.exe	39
PID 1204 wrote to memory of 2324	1204	1f48f7476196b627424e99bd12dd8411.exe	39
PID 2324 wrote to memory of 5092	2324	net.exe	38
PID 2324 wrote to memory of 5092	2324	net.exe	38
PID 2324 wrote to memory of 5092	2324	net.exe	38

C:\Users\Admin\AppData\Local\Temp\1f48f7476196b627424e99bd12dd8411.exe
"C:\Users\Admin\AppData\Local\Temp\1f48f7476196b627424e99bd12dd8411.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Windows\SysWOW64\net.exe
  net stop rfwservice
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3128
- C:\Windows\SysWOW64\net.exe
  net stop rfwproxysrv
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2324
- C:\Windows\inf\winupgrade.exe
  "C:\Windows\inf\winupgrade.exe" /install /SILENT
  2⤵
  PID:4752
- - C:\Windows\ime\cache.exe
    "C:\Windows\ime\cache.exe" /RegServer
    3⤵
    PID:544
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c piaoyao.exe_deleteme.bat
  2⤵
  PID:4972

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop rfwservice
1⤵
PID:4456

C:\Windows\SysWOW64\net1.exe
C:\Windows\system32\net1 stop rfwproxysrv
1⤵
PID:5092

C:\Windows\inf\winupgrade.exe
C:\Windows\inf\winupgrade.exe
1⤵
PID:1748
- C:\Windows\ime\cache.exe
  "C:\Windows\ime\cache.exe" /RegServer
  2⤵
  PID:4460
- C:\Windows\ime\cache.exe
  "C:\Windows\ime\cache.exe" /RegServer
  2⤵
  PID:4560
- C:\Windows\ime\cache.exe
  "C:\Windows\ime\cache.exe" /RegServer
  2⤵
  PID:2584
- C:\Windows\ime\cache.exe
  "C:\Windows\ime\cache.exe" /RegServer
  2⤵
  PID:4704
- C:\Windows\ime\cache.exe
  "C:\Windows\ime\cache.exe" /RegServer
  2⤵
  PID:3372
- C:\Windows\ime\cache.exe
  "C:\Windows\ime\cache.exe" /RegServer
  2⤵
  PID:3100
- C:\Windows\ime\cache.exe
  "C:\Windows\ime\cache.exe" /RegServer
  2⤵
  PID:1468

C:\Windows\IME\cache.exe
C:\Windows\IME\cache.exe -Embedding
1⤵
PID:3764

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

C:\Windows\IME\cache.exe

Filesize
9KB

MD5
c8bd0a07ec8c746d04e318a3d63861dd

SHA1
550992b37ad00f28f2cd83f026847e117a654bc7

SHA256
9c20853aed9ae250eba50a2b18bafac02f6e83e5160f87819add0f0636dbccad

SHA512
f4111d2010635f647f4f5230b8c2868f43fe95b6c5ea63d937e54ac689b69afef858c45fff4d3fe7823725cc8575ac99bf32cee4f0963031f73cb68575d8d052

Download Submit
C:\Windows\INF\winupgrade.exe

Filesize
4KB

MD5
ea826af4f01e6f4f050cec3c63146948

SHA1
b2c55b3722624eea176c3c7b5a7380fdea2e87cf

SHA256
b9b59a6835be53af539851830a4347afe53f7f33e3436515e59381863940d13e

SHA512
6292dce3e48173624d6ed803f6e362d95038cb8bb1e5e77f9901e48849ee752aff1bd3c9fcc341f12e5046cd4e00f025047f1af9184ee2d5a4138e8a9100ab02

Download Submit
C:\Windows\INF\winupgrade.exe

Filesize
32KB

MD5
a0ad265d76eca09e2308dd86dfc4d50c

SHA1
72d8e73c3e022b89f0c22f5fe7908aac12a7b34c

SHA256
bf9cafd4a6fb3ac7deb6703d1be8af31a88ed000491cf5f380b5280b5fd1bb0b

SHA512
d6b15bcc13be439025aaff91161dd579b1a062afa92b9ada91572e77a8ebdbcb86f5868bd38372c4faf5da485b432d0016ea714867f4663b4149351b9c471968

Download Submit
memory/544-70-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/544-69-0x0000000000760000-0x0000000000761000-memory.dmp

Filesize
4KB

Download
memory/1204-109-0x0000000000400000-0x000000000055E000-memory.dmp

Filesize
1.4MB

Download
memory/1204-0-0x0000000000400000-0x000000000055E000-memory.dmp

Filesize
1.4MB

Download
memory/1468-198-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/1748-204-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/1748-123-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/1748-202-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/1748-199-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/1748-163-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/1748-125-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/1748-74-0x00000000006D0000-0x00000000006D1000-memory.dmp

Filesize
4KB

Download
memory/1748-205-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/1748-207-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/2584-115-0x0000000000500000-0x0000000000501000-memory.dmp

Filesize
4KB

Download
memory/2584-114-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/3100-161-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/3372-107-0x00000000005E0000-0x00000000005E1000-memory.dmp

Filesize
4KB

Download
memory/3372-108-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/3764-127-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/3764-126-0x0000000000720000-0x0000000000721000-memory.dmp

Filesize
4KB

Download
memory/4460-121-0x0000000000610000-0x0000000000611000-memory.dmp

Filesize
4KB

Download
memory/4460-162-0x0000000000610000-0x0000000000611000-memory.dmp

Filesize
4KB

Download
memory/4460-120-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/4560-117-0x00000000005D0000-0x00000000005D1000-memory.dmp

Filesize
4KB

Download
memory/4560-118-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/4704-112-0x0000000000620000-0x0000000000621000-memory.dmp

Filesize
4KB

Download
memory/4704-113-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/4752-68-0x0000000000400000-0x0000000000545000-memory.dmp

Filesize
1.3MB

Download
memory/4752-36-0x0000000000620000-0x0000000000621000-memory.dmp

Filesize
4KB

Download