hxxps://culverhahn[.]cn

Analysis

max time kernel
154s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03-01-2024 13:57

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General

Target

https://culverhahn.cn

Score

1^/10

Malware Config

Signatures

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	msedge.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4672	msedge.exe
4672	msedge.exe
3872	msedge.exe
3872	msedge.exe
1932	identity_helper.exe
1932	identity_helper.exe
2412	msedge.exe
2412	msedge.exe
2412	msedge.exe
2412	msedge.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 10 IoCs

pid	Process
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe

Suspicious use of FindShellTrayWindow 25 IoCs

pid	Process
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe

Suspicious use of SendNotifyMessage 24 IoCs

pid	Process
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe
3872	msedge.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3872 wrote to memory of 4560	3872	msedge.exe	82
PID 3872 wrote to memory of 4560	3872	msedge.exe	82
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 1108	3872	msedge.exe	90
PID 3872 wrote to memory of 4672	3872	msedge.exe	89
PID 3872 wrote to memory of 4672	3872	msedge.exe	89
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91
PID 3872 wrote to memory of 4944	3872	msedge.exe	91

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://culverhahn.cn
1⤵
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3872
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ffc913246f8,0x7ffc91324708,0x7ffc91324718
  2⤵
  PID:4560
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2268 /prefetch:3
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4672
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2216 /prefetch:2
  2⤵
  PID:1108
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2740 /prefetch:8
  2⤵
  PID:4944
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3376 /prefetch:1
  2⤵
  PID:3176
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3380 /prefetch:1
  2⤵
  PID:3484
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3092 /prefetch:1
  2⤵
  PID:3700
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3720 /prefetch:1
  2⤵
  PID:2536
- C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5052 /prefetch:8
  2⤵
  PID:2396
- C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5052 /prefetch:8
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1932
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5140 /prefetch:1
  2⤵
  PID:2664
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5072 /prefetch:1
  2⤵
  PID:1484
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4712 /prefetch:1
  2⤵
  PID:4116
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3036 /prefetch:1
  2⤵
  PID:3648
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=14 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2904 /prefetch:1
  2⤵
  PID:220
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=15 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5896 /prefetch:1
  2⤵
  PID:4048
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2184,341639689779550426,13675986341920974000,131072 --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=4318 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --gpu-preferences=UAAAAAAAAADoAAAQAAAAAAAAAAAAAAAAAABgAAAEAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=5248 /prefetch:2
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2412

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:2088

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:1504

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

Filesize
152B

MD5
eb20b5930f48aa090358398afb25b683

SHA1
4892c8b72aa16c5b3f1b72811bf32b89f2d13392

SHA256
2695ab23c2b43aa257f44b6943b6a56b395ea77dc24e5a9bd16acc2578168a35

SHA512
d0c6012a0059bc1bb49b2f293e6c07019153e0faf833961f646a85b992b47896092f33fdccc893334c79f452218d1542e339ded3f1b69bd8e343d232e6c3d9e8

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network Persistent State

Filesize
111B

MD5
285252a2f6327d41eab203dc2f402c67

SHA1
acedb7ba5fbc3ce914a8bf386a6f72ca7baa33c6

SHA256
5dfc321417fc31359f23320ea68014ebfd793c5bbed55f77dab4180bbd4a2026

SHA512
11ce7cb484fee66894e63c31db0d6b7ef66ad0327d4e7e2eb85f3bcc2e836a3a522c68d681e84542e471e54f765e091efe1ee4065641b0299b15613eb32dcc0d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

Filesize
5KB

MD5
f482120732cc40005d68b200fbfd434d

SHA1
8e9aee6e2b4c0df32357a4edca8295d65b56ee9d

SHA256
fd2201a3d608651f73ddc8e883e66bd12e2fde6a44dd624decb53f438af21c01

SHA512
195cd78726bb406ff1750d47a0e9fc15acbb3b7894839c571da5866524e952ab4413c9d39fe1ea4aec6b0d05a3b40a59116536c327b9e7a17d045175522dff54

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

Filesize
5KB

MD5
739e6b39b99de84a662156b24110f121

SHA1
a428b826ae6bbf16946a05b96e9f318add91fe54

SHA256
8dbcedd99ee82dcf486453f208e20ba2b4a0163485cbe56b6f36bdaee9b91357

SHA512
b983ea9d7498dfc37900fc8a0349eb10467f1617409caff3096fc2829d6587437a475d3388b2136ccb4a4a23d396dccb30f1d87422fdc6fd3b859dccb539c0ce

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Secure Preferences

Filesize
24KB

MD5
2bbbdb35220e81614659f8e50e6b8a44

SHA1
7729a18e075646fb77eb7319e30d346552a6c9de

SHA256
73f853ad74a9ac44bc4edf5a6499d237c940c905d3d62ea617fbb58d5e92a8dd

SHA512
59c5c7c0fbe53fa34299395db6e671acfc224dee54c7e1e00b1ce3c8e4dfb308bf2d170dfdbdda9ca32b4ad0281cde7bd6ae08ea87544ea5324bcb94a631f899

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

Filesize
16B

MD5
6752a1d65b201c13b62ea44016eb221f

SHA1
58ecf154d01a62233ed7fb494ace3c3d4ffce08b

SHA256
0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

SHA512
9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

Filesize
11KB

MD5
be80ee59342ec6366467d09f7e61e1b8

SHA1
06fd2f7e6bd47448fa5cf672b3718f4b2a000b09

SHA256
9f4a953344af785f10c1792d6a64b9f85d469b10b85d9ea0907035a68e6ed598

SHA512
b6f867670572ee7e3f01d3d90b477c87ea4f9faafe0ad3ecec8904cbf73532b94230637e5a6f39b42925af378a6076c07ef4bc9b1375b5ca0524843dcb6b515b

Download Submit