nymaim | a44710e8bb09d22a156d27642f0966818a2eb800f093eab23155ed5342d04ece

Analysis

max time kernel
108s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
28/09/2022, 19:19

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General

Target
file.exe
Size 359KB
Sample220928-x1hexaaacr
SHA256 a44710e8bb09d22a156d27642f0966818a2eb800f093eab23155ed5342d04ece
MD5 147e262291880374d2f2f79113cf25af
SHA1 df165cc407cc6327a6c818e0e0c8cae80e193413
SHA512 1c73758a52e8cbf8cbf5cd84df3d3555b507951a601e768e98ece3ca3b88faaee2c58b22dd6413bb956c4de1861a12ad1de3ef865cf060a3482da081a22d080c
SSDEEP 6144:L58pEaEYk910COeXO+gFOiBXcL59nX9Q7iga3wVfg:LyRkb0CXeFOt3p
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3700	Cleaner.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	file.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 11 IoCs

pid	pid_target	Process	procid_target
5076	2044	WerFault.exe	84
1324	2044	WerFault.exe	84
932	2044	WerFault.exe	84
492	2044	WerFault.exe	84
1012	2044	WerFault.exe	84
4524	2044	WerFault.exe	84
2800	2044	WerFault.exe	84
4044	2044	WerFault.exe	84
856	2044	WerFault.exe	84
220	2044	WerFault.exe	84
1936	2044	WerFault.exe	84

Kills process with taskkill 1 IoCs

evasion

pid	Process
1412	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2044	file.exe
2044	file.exe
2044	file.exe
2044	file.exe
2044	file.exe
2044	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2044	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3700	Cleaner.exe
Token: SeDebugPrivilege	1412	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2044 wrote to memory of 2424	2044	file.exe	108
PID 2044 wrote to memory of 2424	2044	file.exe	108
PID 2044 wrote to memory of 2424	2044	file.exe	108
PID 2424 wrote to memory of 3700	2424	cmd.exe	110
PID 2424 wrote to memory of 3700	2424	cmd.exe	110
PID 2044 wrote to memory of 4604	2044	file.exe	126
PID 2044 wrote to memory of 4604	2044	file.exe	126
PID 2044 wrote to memory of 4604	2044	file.exe	126
PID 4604 wrote to memory of 1412	4604	cmd.exe	130
PID 4604 wrote to memory of 1412	4604	cmd.exe	130
PID 4604 wrote to memory of 1412	4604	cmd.exe	130

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2044
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 332
  2⤵
  - Program crash
  PID:5076
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 764
  2⤵
  - Program crash
  PID:1324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 772
  2⤵
  - Program crash
  PID:932
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 796
  2⤵
  - Program crash
  PID:492
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 804
  2⤵
  - Program crash
  PID:1012
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 908
  2⤵
  - Program crash
  PID:4524
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 908
  2⤵
  - Program crash
  PID:2800
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 1332
  2⤵
  - Program crash
  PID:4044
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\CS1ZrJKN77CYsq\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2424
- - C:\Users\Admin\AppData\Local\Temp\CS1ZrJKN77CYsq\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\CS1ZrJKN77CYsq\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:3700
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 1380
  2⤵
  - Program crash
  PID:856
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 1660
  2⤵
  - Program crash
  PID:220
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4604
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1412
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 496
  2⤵
  - Program crash
  PID:1936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 2044 -ip 2044
1⤵
PID:1988

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2044 -ip 2044
1⤵
PID:3136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2044 -ip 2044
1⤵
PID:5056

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2044 -ip 2044
1⤵
PID:892

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 2044 -ip 2044
1⤵
PID:3784

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2044 -ip 2044
1⤵
PID:4528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 2044 -ip 2044
1⤵
PID:2776

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 604 -p 2044 -ip 2044
1⤵
PID:2064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 608 -p 2044 -ip 2044
1⤵
PID:1324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 2044 -ip 2044
1⤵
PID:1944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 2044 -ip 2044
1⤵
PID:3432

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\CS1ZrJKN77CYsq\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\CS1ZrJKN77CYsq\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\CS1ZrJKN77CYsq\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/2044-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2044-134-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/2044-154-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/2044-153-0x0000000000643000-0x000000000066A000-memory.dmp

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memory/2044-140-0x0000000000643000-0x000000000066A000-memory.dmp

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memory/2044-141-0x00000000005C0000-0x00000000005FF000-memory.dmp

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memory/2044-133-0x00000000005C0000-0x00000000005FF000-memory.dmp

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memory/2044-132-0x0000000000643000-0x000000000066A000-memory.dmp

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memory/2044-145-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/3700-144-0x00007FFE937D0000-0x00007FFE94291000-memory.dmp

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memory/3700-146-0x00007FFE937D0000-0x00007FFE94291000-memory.dmp

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memory/3700-143-0x000002337F8D0000-0x000002337F912000-memory.dmp

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memory/3700-139-0x000002337F490000-0x000002337F5E8000-memory.dmp

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