nymaim | cfc71b9cca6323f7ea94919ef2c925a4f04a9b06505184810848bdbb80f8aaaf

Analysis

max time kernel
124s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
25/09/2022, 21:28

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General

Target
file.exe
Size 263KB
Sample220925-1bbgvagbe6
SHA256 cfc71b9cca6323f7ea94919ef2c925a4f04a9b06505184810848bdbb80f8aaaf
MD5 1614889613974c91adcc6278552195e9
SHA1 7d32c5c5f4ebfc1daebac9f09afd14526ee57232
SHA512 efba95f4f50cf048a55d05937b17b75d61a43096b5211e0855658f1bd19d6fbe7f64d9473d781bf8b2ab96b0b5568dc9e454c0c2328a1219b6853ad964a0ecc5
SSDEEP 3072:OV9x/dHmOfC8z5Ydg1ogxbpkaunlH//rF8//JtLeONk5SC0zdBA5VdcFQL9nsVoB:A0dg1o2pkaulfDu//hBBANkq
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
1612	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-1-5-21-2891029575-1462575-1165213807-1000\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
4888	5056	WerFault.exe	81
4592	5056	WerFault.exe	81
4700	5056	WerFault.exe	81
228	5056	WerFault.exe	81
4640	5056	WerFault.exe	81
1692	5056	WerFault.exe	81
3516	5056	WerFault.exe	81
4648	5056	WerFault.exe	81
2460	5056	WerFault.exe	81
1944	5056	WerFault.exe	81
4476	5056	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
852	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5056	file.exe
5056	file.exe
5056	file.exe
5056	file.exe
5056	file.exe
5056	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5056	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1612	Cleaner.exe
Token: SeDebugPrivilege	852	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 5056 wrote to memory of 2108	5056	file.exe	102
PID 5056 wrote to memory of 2108	5056	file.exe	102
PID 5056 wrote to memory of 2108	5056	file.exe	102
PID 2108 wrote to memory of 1612	2108	cmd.exe	104
PID 2108 wrote to memory of 1612	2108	cmd.exe	104
PID 5056 wrote to memory of 5028	5056	file.exe	115
PID 5056 wrote to memory of 5028	5056	file.exe	115
PID 5056 wrote to memory of 5028	5056	file.exe	115
PID 5028 wrote to memory of 852	5028	cmd.exe	119
PID 5028 wrote to memory of 852	5028	cmd.exe	119
PID 5028 wrote to memory of 852	5028	cmd.exe	119

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:5056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 452
  2⤵
  - Program crash
  PID:4888
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 768
  2⤵
  - Program crash
  PID:4592
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 776
  2⤵
  - Program crash
  PID:4700
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 796
  2⤵
  - Program crash
  PID:228
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 804
  2⤵
  - Program crash
  PID:4640
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 948
  2⤵
  - Program crash
  PID:1692
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 896
  2⤵
  - Program crash
  PID:3516
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 1364
  2⤵
  - Program crash
  PID:4648
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\3TdkdBdyA8wg0HLDjuHmiCALR\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2108
- - C:\Users\Admin\AppData\Local\Temp\3TdkdBdyA8wg0HLDjuHmiCALR\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\3TdkdBdyA8wg0HLDjuHmiCALR\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1612
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 1380
  2⤵
  - Program crash
  PID:2460
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 1640
  2⤵
  - Program crash
  PID:1944
- 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:5028
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:852
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 512
  2⤵
  - Program crash
  PID:4476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 5056 -ip 5056
1⤵
PID:5048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 5056 -ip 5056
1⤵
PID:4344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 5056 -ip 5056
1⤵
PID:4696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 5056 -ip 5056
1⤵
PID:3640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 5056 -ip 5056
1⤵
PID:1264

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 5056 -ip 5056
1⤵
PID:4432

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 5056 -ip 5056
1⤵
PID:4304

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 5056 -ip 5056
1⤵
PID:1664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 5056 -ip 5056
1⤵
PID:4756

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 5056 -ip 5056
1⤵
PID:4048

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 5056 -ip 5056
1⤵
PID:5048

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\3TdkdBdyA8wg0HLDjuHmiCALR\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\3TdkdBdyA8wg0HLDjuHmiCALR\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\3TdkdBdyA8wg0HLDjuHmiCALR\Cleaner.exe
Size 3.8MB
SHA256 301d9c55653f6cd8211aafdaf130092cb7ef8ea2e54db2db97153c1c8abf272c
MD5 23c1e8f48ec06960bbd9969c1f404192
SHA1 b9384151eb3f2dbd095fa273c248722e1cc74ea3
SHA512 f572e3a0ad58b3a1ed22db00b05a3909f7f53f70b84ab736e2dd6ddc54d8781fcffe4a9b33b0dd2836d438a1982b944426fe4ed01bd866bd77e20046220f2b5b
SSDEEP 49152:W/PD/DL/D9CuZrr2h60qPAnDfvl/DK1zAb2ibtbelHi2btsTBrfwWXRxL56ZD0Mp:W3D///UUrPmfvVDWASmXnMn
MD5 SHA1 SHA512 SSDEEP

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memory/1612-145-0x00007FF996A60000-0x00007FF997521000-memory.dmp

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memory/1612-141-0x000001E387530000-0x000001E3876B0000-memory.dmp

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memory/1612-142-0x00007FF996A60000-0x00007FF997521000-memory.dmp

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memory/1612-144-0x000001E389380000-0x000001E3893C2000-memory.dmp

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memory/5056-136-0x0000000000400000-0x000000000059C000-memory.dmp

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memory/5056-135-0x0000000000400000-0x000000000059C000-memory.dmp

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memory/5056-133-0x0000000000889000-0x00000000008AF000-memory.dmp

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memory/5056-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/5056-134-0x0000000000830000-0x000000000086F000-memory.dmp

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memory/5056-152-0x0000000000400000-0x000000000059C000-memory.dmp

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