nymaim | fa233c978be7bbc90646c35a689a9a55da8849846f2b93fde76956c79cba263a

Analysis

max time kernel
100s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2022, 14:10

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General

Target
file.exe
Size 230KB
Sample220930-rgp3radgd7
SHA256 fa233c978be7bbc90646c35a689a9a55da8849846f2b93fde76956c79cba263a
MD5 ba1ed167eac3b87fcea19c620d642c08
SHA1 4fd37ebda9c709f5b60d78935c95154d7c0040bf
SHA512 4a2dad83f4f939dbd3a2f485213fec59a0e0c5cc68649bf18d15b2c253d27496f1b62c3ce06a10384d603e59fce01ce5371b85d6efb5896477ce4ecc2bdf41fb
SSDEEP 3072:BmjKUK+VgVMXT7LFY29H6MiY6nGRwTe6FPyrtuoBX7HSLuUwyieToyp+URfoaNYI:qTVAypuoBaMyp1gNGzXaoGNG
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
1544	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-1-5-21-2629973501-4017243118-3254762364-1000\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
408	2352	WerFault.exe	79
1744	2352	WerFault.exe	79
2888	2352	WerFault.exe	79
4816	2352	WerFault.exe	79
5076	2352	WerFault.exe	79
3104	2352	WerFault.exe	79
4100	2352	WerFault.exe	79
4212	2352	WerFault.exe	79
3960	2352	WerFault.exe	79
4176	2352	WerFault.exe	79
3576	2352	WerFault.exe	79

Kills process with taskkill 1 IoCs

evasion

pid	Process
1432	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2352	file.exe
2352	file.exe
2352	file.exe
2352	file.exe
2352	file.exe
2352	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2352	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1544	Cleaner.exe
Token: SeDebugPrivilege	1432	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 4232	2352	file.exe	97
PID 2352 wrote to memory of 4232	2352	file.exe	97
PID 2352 wrote to memory of 4232	2352	file.exe	97
PID 4232 wrote to memory of 1544	4232	cmd.exe	99
PID 4232 wrote to memory of 1544	4232	cmd.exe	99
PID 2352 wrote to memory of 2580	2352	file.exe	114
PID 2352 wrote to memory of 2580	2352	file.exe	114
PID 2352 wrote to memory of 2580	2352	file.exe	114
PID 2580 wrote to memory of 1432	2580	cmd.exe	118
PID 2580 wrote to memory of 1432	2580	cmd.exe	118
PID 2580 wrote to memory of 1432	2580	cmd.exe	118

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:2352
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 464
  2⤵
  - Program crash
  PID:408
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 760
  2⤵
  - Program crash
  PID:1744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 788
  2⤵
  - Program crash
  PID:2888
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 760
  2⤵
  - Program crash
  PID:4816
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 840
  2⤵
  - Program crash
  PID:5076
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 780
  2⤵
  - Program crash
  PID:3104
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 856
  2⤵
  - Program crash
  PID:4100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 1368
  2⤵
  - Program crash
  PID:4212
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\HCyBim9UhUdUdFPjtqs5xO\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\Users\Admin\AppData\Local\Temp\HCyBim9UhUdUdFPjtqs5xO\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\HCyBim9UhUdUdFPjtqs5xO\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1544
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 1380
  2⤵
  - Program crash
  PID:3960
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 1580
  2⤵
  - Program crash
  PID:4176
- 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:2580
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1432
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2352 -s 504
  2⤵
  - Program crash
  PID:3576

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2352 -ip 2352
1⤵
PID:3576

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2352 -ip 2352
1⤵
PID:2272

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2352 -ip 2352
1⤵
PID:788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 2352 -ip 2352
1⤵
PID:4900

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2352 -ip 2352
1⤵
PID:1388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 624 -p 2352 -ip 2352
1⤵
PID:4644

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 648 -p 2352 -ip 2352
1⤵
PID:1116

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 672 -p 2352 -ip 2352
1⤵
PID:2476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 676 -p 2352 -ip 2352
1⤵
PID:2988

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 388 -p 2352 -ip 2352
1⤵
PID:1520

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 632 -p 2352 -ip 2352
1⤵
PID:4192

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

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\HCyBim9UhUdUdFPjtqs5xO\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\HCyBim9UhUdUdFPjtqs5xO\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\HCyBim9UhUdUdFPjtqs5xO\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/1544-140-0x00007FFE535C0000-0x00007FFE54081000-memory.dmp

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memory/1544-142-0x0000027D773C0000-0x0000027D77402000-memory.dmp

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memory/1544-145-0x00007FFE535C0000-0x00007FFE54081000-memory.dmp

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memory/1544-139-0x0000027D74330000-0x0000027D74488000-memory.dmp

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memory/2352-143-0x00000000007DD000-0x0000000000804000-memory.dmp

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memory/2352-134-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/2352-132-0x00000000007DD000-0x0000000000804000-memory.dmp

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memory/2352-144-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/2352-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2352-133-0x0000000000730000-0x000000000076F000-memory.dmp

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memory/2352-152-0x00000000007DD000-0x0000000000804000-memory.dmp

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memory/2352-153-0x0000000000400000-0x0000000000597000-memory.dmp

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