257f8251ab61b944b75deafc681030a20b6dd5ae03b8540d8f482a6c291efb96

Analysis

max time kernel
1799s
max time network
1142s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
12-07-2024 15:47

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General

Target

QuickUpgrade.exe
Size

470KB
MD5

7ee9df8c8bcae05df1ca4f163fe1d8ad
SHA1

8afb7a02451c7275d5c83c9adda12670980dae87
SHA256

929b5910c1a2e4e595d7f2b7c7838317ae58671ca1fa38e2cc4144e093fe4afe
SHA512

b149115c65a43fb709d06db2906164f90dda254d2a42f17b68b0bee14fdf3b1a56c03441b302fe7a62ba320d85bb023aaf16b2b590a9a40d611c5a9e64df99fa
SSDEEP

3072:/MlF9kZSPyI9m1+rxy9dTDs/ZR1ctUA/86KF7HEyCwMQOrUsLVtPk7HoZ7WK7TRc:/Mlsi9u+ty9xElcyWK+EKfLP7WGo

Score

6^/10

Malware Config

Signatures

Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 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-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	QuickUpgrade.exe
Key value queried	\REGISTRY\USER\S-1-5-21-384068567-2943195810-3631207890-1000\Control Panel\International\Geo\Nation	pl4sfx.exe

Executes dropped EXE 4 IoCs

pid	Process
4436	pl4sfx.exe
2092	PostUpdate.exe
632	bitsumsessionagent.exe
3156	processlasso.exe

Loads dropped DLL 6 IoCs

pid	Process
3540	QuickUpgrade.exe
3540	QuickUpgrade.exe
2092	PostUpdate.exe
2092	PostUpdate.exe
3156	processlasso.exe
3156	processlasso.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	PostUpdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	PostUpdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	processlasso.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	processlasso.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
632	bitsumsessionagent.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeAssignPrimaryTokenPrivilege	3156	processlasso.exe
Token: SeDebugPrivilege	3156	processlasso.exe
Token: SeChangeNotifyPrivilege	3156	processlasso.exe
Token: SeIncBasePriorityPrivilege	3156	processlasso.exe
Token: SeIncreaseQuotaPrivilege	3156	processlasso.exe
Token: SeCreateGlobalPrivilege	3156	processlasso.exe
Token: SeProfSingleProcessPrivilege	3156	processlasso.exe
Token: SeBackupPrivilege	3156	processlasso.exe
Token: SeRestorePrivilege	3156	processlasso.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3540 wrote to memory of 4436	3540	QuickUpgrade.exe	84
PID 3540 wrote to memory of 4436	3540	QuickUpgrade.exe	84
PID 3540 wrote to memory of 4436	3540	QuickUpgrade.exe	84
PID 4436 wrote to memory of 2092	4436	pl4sfx.exe	86
PID 4436 wrote to memory of 2092	4436	pl4sfx.exe	86
PID 2092 wrote to memory of 3156	2092	PostUpdate.exe	89
PID 2092 wrote to memory of 3156	2092	PostUpdate.exe	89

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\QuickUpgrade.exe
"C:\Users\Admin\AppData\Local\Temp\QuickUpgrade.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3540
- C:\Users\Admin\AppData\Local\Temp\bitsum\processlasso\pl4sfx.exe
  "C:\Users\Admin\AppData\Local\Temp\bitsum\processlasso\pl4sfx.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4436
- - C:\Users\Admin\AppData\Local\Temp\PostUpdate.exe
    "C:\Users\Admin\AppData\Local\Temp\PostUpdate.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious use of WriteProcessMemory
    PID:2092
  - - C:\Users\Admin\AppData\Local\Temp\processlasso.exe
      /postupdate
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Checks processor information in registry
      Suspicious use of AdjustPrivilegeToken
      PID:3156

C:\Users\Admin\AppData\Local\Temp\bitsumsessionagent.exe
C:\Users\Admin\AppData\Local\Temp\bitsumsessionagent.exe ----------------------------------------------------------------
1⤵
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
PID:632

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

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Downloads

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

Filesize
662KB

MD5
bb2506cfd974bbb671075703af3ba34d

SHA1
7dff63921930877f384d46ec2e83e9fc65631908

SHA256
304d78f9754a1921b95c2efc91d2e3b746ea7fe64a8e88f096900fcfef95ab97

SHA512
b18ede7522ce010e21b2f367276d1fd9bc8c8ae647f4534aefd2461879eaaa4dcfcaabdd47401de7764add7e9a4784afacb16376bd518c885fc19b6e1869b580

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

Filesize
471KB

MD5
3ca525e181221bea925983a7df61f712

SHA1
8f4d165464c6b9c275700b44a9f4edc3f5462cbb

SHA256
13a9fbdf75a5051499685f2b140788e46a53af6890af094dbfe61ca766316d2f

SHA512
ec73d2c502a15da048cabc85f16a0b65f9a8e81a7a3dd8e5108ea594e5c06e1e08d314fc7b72f6276a513aa1a6da1ad0b6b75e808842295e9e811e1e85c5b7a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\bitsum\processlasso\pl4sfx.exe

Filesize
2.9MB

MD5
5e30f03479a5607d89c4f5f372deae0b

SHA1
99ae6721a7b9efdcc23160610f23f71304ff039e

SHA256
e0e414a143c82f06038cfaa468bdd39a39c683e07dc310923e6495bbc8d6751f

SHA512
731ace4798c98522aa131f7e0f23250a99b502210dc6876a87099975abfae410e4913896f701db70845f577baa70db40d7bf1e82dc7f2ce29659228d7f13d7db

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

Filesize
177KB

MD5
7f55918ca6706935ebf3000e277ec7f3

SHA1
725b09394b76ccc066ac4fbc00357fbbb2a60f34

SHA256
7592cdd84b1085851f3a6ef03bc386a381117cdb884c720be1bd8dcf62a296ea

SHA512
fe218d72e4e17097143860b57f22de32ecac1b5cbcb93e856404bed7884ce2b389d39f3ed654a1d8bdc5f08847ebfd3fdf9ba0f1f1efd32e55fe6bf250f9afc9

Download Submit
C:\Users\Admin\AppData\Local\Temp\pl_rsrc_english.dll

Filesize
1.9MB

MD5
40d2b640a737039f0ae3bea77470cdfd

SHA1
f22c0a3ed620659ec76b1dc499b9965e4b6b3a2b

SHA256
be8a66f9560f0f3d2dcb12a3608deeae7a64e87340462c0f409c640580c514f8

SHA512
17b8d4c47875b909e4a70373033dd28cde2f2805509845eaf0ac264c85ddeec657d17276b38f37211d4102de87a8b0c91c646d17826b18c2f4f3f9badc4d3b29

Download Submit
C:\Users\Admin\AppData\Local\Temp\pl_rsrc_temp.dll

Filesize
1.9MB

MD5
258063bdcafc8fd2a2a50d9065989ad6

SHA1
ee1bebd8c909d8ebe3b5b6f155c68fc7e6696e31

SHA256
01b75b825eef6092db03156d3e87342a875bfd355a6cf8d9a87365f4c5fda85f

SHA512
b0732da44481e09f38e903fab2bf81447bf661d785631ab2b7421a89b80ef2db38203d85dbea5535c5bb09e8550a2ca737db6c86eac372515ebdf803a59cb5ca

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

Filesize
1.8MB

MD5
895af2aaf9c99ea08f42d52b97e50ec1

SHA1
e514cbaf6d9e243f107efc74cf2fe7646d87dcb3

SHA256
a160cee89af34cfefa86ba433aa367eb36a593782bc2c014e9744d15436b3870

SHA512
dafe2dc0b3b7d612cdd07a6a870b5f881a8fa5d371040b4bb06d6b5fc6e84eb979ba89828cd7f76ac17b6c414174d8fe349ee44fe5bcdad422ad901657952bb9

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads