gurcu | 2869db18f346049bcc9e378a77ed809fd9caad2fd2bd4d9f58d6e728c784b3eb

Resubmissions

03-05-2023 13:44

230503-q1ssbaeh54 10

24-04-2023 12:05

230424-n86m2abf58 7

Analysis

max time kernel
142s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
03-05-2023 13:44

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

f19126b02be0b331982e041dc9bcad51.exe
Size

223KB
MD5

f19126b02be0b331982e041dc9bcad51
SHA1

10ab04a6f24ce4540a564041375d8275a691e409
SHA256

2869db18f346049bcc9e378a77ed809fd9caad2fd2bd4d9f58d6e728c784b3eb
SHA512

e6158c6c1563ff3f013b97c0b5da7b5f3301657b948ddb1198ebaea7ce5fc3a9c9f3f449646f45c070514e8796e6315a2afaab7894ba20e3b857a5dc504d093c
SSDEEP

3072:fvfoUJQCw+d+Uoj9DVbDWb0Cdfc6mdSCFytxpNS17e+8TNBfxz9l:fvfoOQHelqJbD4HJe7FytVSle+8TxX

Score

10^/10

gurcu spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot5975822207:AAFJtzAlzLoF8RfkpKUagQJGRi0ksib6w3g/sendMessage?chat_id=1396661331

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu

Checks computer location settings 2 TTPs 4 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-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	f19126b02be0b331982e041dc9bcad51.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	f19126b02be0b331982e041dc9bcad51.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	f19126b02be0b331982e041dc9bcad51.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	f19126b02be0b331982e041dc9bcad51.exe

Executes dropped EXE 6 IoCs

pid	Process
3764	f19126b02be0b331982e041dc9bcad51.exe
3492	tor.exe
1824	f19126b02be0b331982e041dc9bcad51.exe
3196	tor.exe
1528	f19126b02be0b331982e041dc9bcad51.exe
1992	tor.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
20	ip-api.com

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1764	1824	WerFault.exe	101
464	1528	WerFault.exe	106

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
4376	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4448	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3764	f19126b02be0b331982e041dc9bcad51.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1796	f19126b02be0b331982e041dc9bcad51.exe
Token: SeDebugPrivilege	3764	f19126b02be0b331982e041dc9bcad51.exe
Token: SeDebugPrivilege	1824	f19126b02be0b331982e041dc9bcad51.exe
Token: SeDebugPrivilege	1528	f19126b02be0b331982e041dc9bcad51.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 3736	1796	f19126b02be0b331982e041dc9bcad51.exe	84
PID 1796 wrote to memory of 3736	1796	f19126b02be0b331982e041dc9bcad51.exe	84
PID 3736 wrote to memory of 1992	3736	cmd.exe	86
PID 3736 wrote to memory of 1992	3736	cmd.exe	86
PID 3736 wrote to memory of 4448	3736	cmd.exe	87
PID 3736 wrote to memory of 4448	3736	cmd.exe	87
PID 3736 wrote to memory of 4376	3736	cmd.exe	88
PID 3736 wrote to memory of 4376	3736	cmd.exe	88
PID 3736 wrote to memory of 3764	3736	cmd.exe	89
PID 3736 wrote to memory of 3764	3736	cmd.exe	89
PID 3764 wrote to memory of 3596	3764	f19126b02be0b331982e041dc9bcad51.exe	93
PID 3764 wrote to memory of 3596	3764	f19126b02be0b331982e041dc9bcad51.exe	93
PID 3764 wrote to memory of 3492	3764	f19126b02be0b331982e041dc9bcad51.exe	95
PID 3764 wrote to memory of 3492	3764	f19126b02be0b331982e041dc9bcad51.exe	95
PID 1824 wrote to memory of 3196	1824	f19126b02be0b331982e041dc9bcad51.exe	102
PID 1824 wrote to memory of 3196	1824	f19126b02be0b331982e041dc9bcad51.exe	102
PID 1528 wrote to memory of 1992	1528	f19126b02be0b331982e041dc9bcad51.exe	107
PID 1528 wrote to memory of 1992	1528	f19126b02be0b331982e041dc9bcad51.exe	107

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\f19126b02be0b331982e041dc9bcad51.exe
"C:\Users\Admin\AppData\Local\Temp\f19126b02be0b331982e041dc9bcad51.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1796
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "f19126b02be0b331982e041dc9bcad51" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\f19126b02be0b331982e041dc9bcad51.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3736
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1992
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4448
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "f19126b02be0b331982e041dc9bcad51" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4376
- - C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe
    "C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3764
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp8E5A.tmp" -C "C:\Users\Admin\AppData\Local\i86t5yhbwx"
      4⤵
      PID:3596
  - - C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe
      "C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\i86t5yhbwx\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:3492

C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe
C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe
  "C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\i86t5yhbwx\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:3196
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 1824 -s 1992
  2⤵
  - Program crash
  PID:1764

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 404 -p 1824 -ip 1824
1⤵
PID:4968

C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe
C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1528
- C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe
  "C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\i86t5yhbwx\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:1992
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 1528 -s 2268
  2⤵
  - Program crash
  PID:464

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 508 -p 1528 -ip 1528
1⤵
PID:2760

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\f19126b02be0b331982e041dc9bcad51.exe.log

Filesize
1KB

MD5
fc1be6f3f52d5c841af91f8fc3f790cb

SHA1
ac79b4229e0a0ce378ae22fc6104748c5f234511

SHA256
6da862f7c7feffca99cd58712ece93928c6ca6aed617f5d8c10a4718eaa2a910

SHA512
2f46165017309ee1a0c1b23e30a71e52e86ad8933e2649bf58c3f4628c5aa75659f5b8f6be32c2882f220b2f3ff2fd50d8766bf0a3708c94c2c634c051a05ea6

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe

Filesize
223KB

MD5
f19126b02be0b331982e041dc9bcad51

SHA1
10ab04a6f24ce4540a564041375d8275a691e409

SHA256
2869db18f346049bcc9e378a77ed809fd9caad2fd2bd4d9f58d6e728c784b3eb

SHA512
e6158c6c1563ff3f013b97c0b5da7b5f3301657b948ddb1198ebaea7ce5fc3a9c9f3f449646f45c070514e8796e6315a2afaab7894ba20e3b857a5dc504d093c

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe

Filesize
223KB

MD5
f19126b02be0b331982e041dc9bcad51

SHA1
10ab04a6f24ce4540a564041375d8275a691e409

SHA256
2869db18f346049bcc9e378a77ed809fd9caad2fd2bd4d9f58d6e728c784b3eb

SHA512
e6158c6c1563ff3f013b97c0b5da7b5f3301657b948ddb1198ebaea7ce5fc3a9c9f3f449646f45c070514e8796e6315a2afaab7894ba20e3b857a5dc504d093c

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe

Filesize
223KB

MD5
f19126b02be0b331982e041dc9bcad51

SHA1
10ab04a6f24ce4540a564041375d8275a691e409

SHA256
2869db18f346049bcc9e378a77ed809fd9caad2fd2bd4d9f58d6e728c784b3eb

SHA512
e6158c6c1563ff3f013b97c0b5da7b5f3301657b948ddb1198ebaea7ce5fc3a9c9f3f449646f45c070514e8796e6315a2afaab7894ba20e3b857a5dc504d093c

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\f19126b02be0b331982e041dc9bcad51.exe

Filesize
223KB

MD5
f19126b02be0b331982e041dc9bcad51

SHA1
10ab04a6f24ce4540a564041375d8275a691e409

SHA256
2869db18f346049bcc9e378a77ed809fd9caad2fd2bd4d9f58d6e728c784b3eb

SHA512
e6158c6c1563ff3f013b97c0b5da7b5f3301657b948ddb1198ebaea7ce5fc3a9c9f3f449646f45c070514e8796e6315a2afaab7894ba20e3b857a5dc504d093c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8E5A.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\data\cached-microdesc-consensus.tmp

Filesize
2.3MB

MD5
7f55b9f34c9cbd30e19197ee1d87dc8e

SHA1
cd9cf68f469848ba6e5bd08265a2e82282d048eb

SHA256
d47d9c83e6fe77c3ffcdc15077f348cafa5be86becd65980ec0fb9d9c003f197

SHA512
0a3bf8fa6ca0c7a9332aa0941ab9fc70765013aba96132f2c9256cb21edae8872737154721886c363969dad05fd7465dcb4afdbf2f1fe368e9f43b21cce37f52

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\data\cached-microdescs.new

Filesize
7.9MB

MD5
5f091cae9c8e29f46904fce7fb81b904

SHA1
10cc62de0f33cc6ae702d63cc70b7b1fdad7aadb

SHA256
d98bd18422b372f793303b86bef1d429c8d4a078aee2a7d8b0943d7b0ab07f48

SHA512
3182e4a8031b151318e30dc87ef3c0e67e8af21a6fd82016dda17975246c0d0f98b4d4351177241fe089d8c2ccedce4120633d58b231154cfecaa71d47c6de57

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\host\hostname

Filesize
64B

MD5
945b5f7fe372d8fa5e105d1800d2cd19

SHA1
374d408e91e01196e752426a474242413acf84b5

SHA256
d024ea5491fc0c790dcf9b9793e931f6ac20223d963b302f174267e917f3e6a1

SHA512
d681e2d7b82ab2aabf7119d8505f07340b417d4964aeb78abe09f7f98034c7377e767ec9cb2bda6fbfb0f0bbcf77dcd38a5a834f5ac2cbc163d782ad39c0f187

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\port.dat

Filesize
4B

MD5
87784eca6b0dea1dff92478fb786b401

SHA1
1ada5d1d8c5966b872190c472e8608536971afa2

SHA256
264fd4d30b6f069df5be7cd14c3a167a0fc59fe221b02453bb697911aa973957

SHA512
60d3c2cc81b18458f1e63e8e5919869d3b646b26c2ce7e819781109dc561bac82ef02afe89768af595ba90fe5d43998ea3363389027733dbd61c3d52ad3ba9a4

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\i86t5yhbwx\torrc.txt

Filesize
218B

MD5
59bdf4821e51b73edc3c84432bba73be

SHA1
13958fb77bff75e3203c027f49d655dd3741ee94

SHA256
0a718b93141dca3bfb0f7cc933e86af0765517340dbfc7a05f1c7f0f09a6fb47

SHA512
5c1e14eb23aa4e1c186707e82cbf14ff77b100acdc2c92148cbcc406ed50b45c1efa0831afa45cb1e3cb7e02845ecc6d9e33912f5bab40574a728e235dba3c60

Download Submit
memory/1796-134-0x000001F957BE0000-0x000001F957BF0000-memory.dmp

Filesize
64KB

Download
memory/1796-133-0x000001F9577C0000-0x000001F9577FC000-memory.dmp

Filesize
240KB

Download
memory/1824-203-0x000002559DFD0000-0x000002559DFE0000-memory.dmp

Filesize
64KB

Download
memory/3764-179-0x0000026348C10000-0x0000026348C20000-memory.dmp

Filesize
64KB

Download
memory/3764-142-0x0000026348C10000-0x0000026348C20000-memory.dmp

Filesize
64KB

Download