nymaim | ac862ba3cb5ad90f8e3d37f72e886cdee49c23fedeb61672f772ae101296c112

Analysis

max time kernel
91s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
10/10/2022, 11:31

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General

Target
file.exe
Size 406KB
Sample221010-nmp36abfc7
SHA256 ac862ba3cb5ad90f8e3d37f72e886cdee49c23fedeb61672f772ae101296c112
MD5 3d151da955eb8fb86b751efb63d8942d
SHA1 991a19f943308f112117d8efb64faf923706229e
SHA512 6f607651637f9ca469ec9a2b9aec43351bb5a73973118be3475dfa3e1a09a19d7541521b181286319219d8684ead384d578135d8d1a45a73f7ddfcb992b3ac7d
SSDEEP 6144:zDPRS552xMoVv0gBbS4Y2gxpGdmojI+rwVfquS:zDM552LJGSgx0dq+d
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

Executes dropped EXE 1 IoCs

pid	Process
3608	UAM5U.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

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

System Information Discovery
T1082

Program crash 9 IoCs

pid	pid_target	Process	procid_target
4804	560	WerFault.exe	81
1248	560	WerFault.exe	81
860	560	WerFault.exe	81
808	560	WerFault.exe	81
220	560	WerFault.exe	81
2660	560	WerFault.exe	81
3760	560	WerFault.exe	81
4276	560	WerFault.exe	81
1252	560	WerFault.exe	81

Kills process with taskkill 1 IoCs

evasion

pid	Process
1932	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
560	file.exe
560	file.exe
560	file.exe
560	file.exe
560	file.exe
560	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1932	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 560 wrote to memory of 3608	560	file.exe	100
PID 560 wrote to memory of 3608	560	file.exe	100
PID 560 wrote to memory of 3608	560	file.exe	100
PID 560 wrote to memory of 4184	560	file.exe	107
PID 560 wrote to memory of 4184	560	file.exe	107
PID 560 wrote to memory of 4184	560	file.exe	107
PID 4184 wrote to memory of 1932	4184	cmd.exe	110
PID 4184 wrote to memory of 1932	4184	cmd.exe	110
PID 4184 wrote to memory of 1932	4184	cmd.exe	110

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 use of WriteProcessMemory
PID:560
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 452
  2⤵
  - Program crash
  PID:4804
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 764
  2⤵
  - Program crash
  PID:1248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 772
  2⤵
  - Program crash
  PID:860
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 796
  2⤵
  - Program crash
  PID:808
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 856
  2⤵
  - Program crash
  PID:220
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 880
  2⤵
  - Program crash
  PID:2660
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 884
  2⤵
  - Program crash
  PID:3760
- C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\UAM5U.exe
  2⤵
  - Executes dropped EXE
  PID:3608
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 1416
  2⤵
  - Program crash
  PID:4276
- 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:4184
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1932
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 560 -s 492
  2⤵
  - Program crash
  PID:1252

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 560 -ip 560
1⤵
PID:928

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 560 -ip 560
1⤵
PID:4408

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 560 -ip 560
1⤵
PID:1796

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 560 -ip 560
1⤵
PID:444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 560 -ip 560
1⤵
PID:320

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 560 -ip 560
1⤵
PID:60

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 560 -ip 560
1⤵
PID:1832

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 560 -ip 560
1⤵
PID:1028

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 560 -ip 560
1⤵
PID:3656

Network

MITRE ATT&CK Enterprise v6

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

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Downloads

UAM5U.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\UAM5U.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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UAM5U.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\UAM5U.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/560-132-0x0000000000827000-0x0000000000857000-memory.dmp

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memory/560-133-0x0000000000910000-0x0000000000963000-memory.dmp

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memory/560-134-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/560-138-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/560-142-0x0000000000827000-0x0000000000857000-memory.dmp

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memory/560-143-0x0000000000400000-0x000000000046B000-memory.dmp

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memory/560-146-0x0000000000400000-0x000000000046B000-memory.dmp

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