nymaim | 38de0a47a2c5d8dfbe97750912a2cc4f1e9c1db8ae085e08d1dc9b8074cc29e2

Analysis

max time kernel
91s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
09/01/2023, 12:31

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General

Target
file.exe
Size 1.2MB
Sample230109-pp216shf2s
SHA256 38de0a47a2c5d8dfbe97750912a2cc4f1e9c1db8ae085e08d1dc9b8074cc29e2
MD5 eb837617fee580fd4046b848897ab259
SHA1 e2050ea53b0a7b5129e885dd94ebe501a4e4ad85
SHA512 32a9c5549f812047a14979172b102d787f48c25294cd3d255b96c9870b9338bf4b675c4c8edc31894b508b0da1f458692db422ba97e8bdc1a19a6ae041aaf1ec
SSDEEP 24576:R20i5f61uhBmtufjolu9WzW25LtNc393TW3Kq6RICx0eQ05HJUpSkl5l/Hlc:R2J664ufQWOLtNcNi3smJeX9Wl50
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
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 3 IoCs

pid	Process
1200	file.tmp
1016	JitFiles135.exe
3604	IzzBFN.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	JitFiles135.exe

Loads dropped DLL 1 IoCs

pid	Process
1200	file.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\is-QHPN2.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CJDP5.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-VNC7B.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-J7Q7J.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-C0U2L.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-C8OEG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-9MBEJ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-4MRT4.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-VCSHH.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1A6N3.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-69GN0.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-Q2O3N.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\JitFiles135.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\is-PKJHQ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-OI4V4.tmp	file.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1856	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1016	JitFiles135.exe
1016	JitFiles135.exe
1016	JitFiles135.exe
1016	JitFiles135.exe
1016	JitFiles135.exe
1016	JitFiles135.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1856	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 1200	4736	file.exe	82
PID 4736 wrote to memory of 1200	4736	file.exe	82
PID 4736 wrote to memory of 1200	4736	file.exe	82
PID 1200 wrote to memory of 1016	1200	file.tmp	83
PID 1200 wrote to memory of 1016	1200	file.tmp	83
PID 1200 wrote to memory of 1016	1200	file.tmp	83
PID 1016 wrote to memory of 3604	1016	JitFiles135.exe	84
PID 1016 wrote to memory of 3604	1016	JitFiles135.exe	84
PID 1016 wrote to memory of 3604	1016	JitFiles135.exe	84
PID 1016 wrote to memory of 1048	1016	JitFiles135.exe	92
PID 1016 wrote to memory of 1048	1016	JitFiles135.exe	92
PID 1016 wrote to memory of 1048	1016	JitFiles135.exe	92
PID 1048 wrote to memory of 1856	1048	cmd.exe	94
PID 1048 wrote to memory of 1856	1048	cmd.exe	94
PID 1048 wrote to memory of 1856	1048	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Users\Admin\AppData\Local\Temp\is-GK5UK.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-GK5UK.tmp\file.tmp" /SL5="$F014C,1055474,51712,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1200
- - C:\Program Files (x86)\Split Files\JitFiles135.exe
    "C:\Program Files (x86)\Split Files\JitFiles135.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1016
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\IzzBFN.exe
      4⤵
      Executes dropped EXE
      PID:3604
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "JitFiles135.exe" /f & erase "C:\Program Files (x86)\Split Files\JitFiles135.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1048
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "JitFiles135.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1856

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

Replay Monitor

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Downloads

JitFiles135.exe

Path C:\Program Files (x86)\Split Files\JitFiles135.exe
Size 1.8MB
SHA256 9638f3965fe872cd6b0eff0d4e8dcf4de059582207843681905b6b72e423b036
MD5 4785835c1cef8022998b24c6236cfccf
SHA1 e97f14094e0b8e996d0d7d580f0de6085b5b25c6
SHA512 b642b557ed6ce23e5ac183dd413b49ea39aaf6392a7c4081fe544b3761438e71f81ba8ac6f5fa53920b979a2ad10ea20872c3e84bd9424a557211012fe73d2bf
SSDEEP 24576:lAp3O3+Z9hMHw/1c/GfCC/zXzwz4l0hxZNkxAa6oz9Uel8qoqvixIEU:em+31iww8onkx/l/Y4
MD5 SHA1 SHA512 SSDEEP

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JitFiles135.exe

Path C:\Program Files (x86)\Split Files\JitFiles135.exe
Size 1.8MB
SHA256 9638f3965fe872cd6b0eff0d4e8dcf4de059582207843681905b6b72e423b036
MD5 4785835c1cef8022998b24c6236cfccf
SHA1 e97f14094e0b8e996d0d7d580f0de6085b5b25c6
SHA512 b642b557ed6ce23e5ac183dd413b49ea39aaf6392a7c4081fe544b3761438e71f81ba8ac6f5fa53920b979a2ad10ea20872c3e84bd9424a557211012fe73d2bf
SSDEEP 24576:lAp3O3+Z9hMHw/1c/GfCC/zXzwz4l0hxZNkxAa6oz9Uel8qoqvixIEU:em+31iww8onkx/l/Y4
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-8A6KK.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-GK5UK.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-GK5UK.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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IzzBFN.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\IzzBFN.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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IzzBFN.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\IzzBFN.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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memory/1016-144-0x0000000000400000-0x00000000013CD000-memory.dmp

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memory/1016-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1016-143-0x0000000000400000-0x00000000013CD000-memory.dmp

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memory/1016-156-0x0000000000400000-0x00000000013CD000-memory.dmp

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memory/1016-153-0x0000000000400000-0x00000000013CD000-memory.dmp

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memory/4736-152-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4736-137-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4736-132-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4736-157-0x0000000000400000-0x0000000000414000-memory.dmp

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