nymaim | 03ab2530d12832256502aca9abfccaed4ca59c7e93a9a5b2c385434033377e84

Analysis

max time kernel
171s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
24/11/2022, 02:01

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General

Target
file.exe
Size 1.3MB
Sample221124-cfkdjsaf27
SHA256 03ab2530d12832256502aca9abfccaed4ca59c7e93a9a5b2c385434033377e84
MD5 7464bccd4f1955c189a0dd53a0610e79
SHA1 195e860de1eaf4351ed9ed4ea1eeaef215be82d2
SHA512 c273193353bf5373bdebd52c1e7e38d8db3cc56df5a218684b0b757139ce7283cb626ef3d1ce7e851efa93882ede0e26c2711a6dbb75a9a325ba9d4752b814b1
SSDEEP 24576:tizw07toLDz4rN15rKtDZjqHZdBNRvtV8DHnX6ABSvPsgZIY7eCLxYiF:GZ72DMrN15+fqHblGnX6AwPrNeViF
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
3988	is-OGF2I.tmp
208	PrintFolders.exe
3692	49t7sRv8Zhhp.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3988	is-OGF2I.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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-2FNKA.tmp	is-OGF2I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8A6OA.tmp	is-OGF2I.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OGF2I.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OGF2I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0TAEI.tmp	is-OGF2I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-J84RV.tmp	is-OGF2I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-57GVE.tmp	is-OGF2I.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QI53E.tmp	is-OGF2I.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-OGF2I.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
4964	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
208	PrintFolders.exe
208	PrintFolders.exe
208	PrintFolders.exe
208	PrintFolders.exe
208	PrintFolders.exe
208	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
208	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4964	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 3988	1452	file.exe	82
PID 1452 wrote to memory of 3988	1452	file.exe	82
PID 1452 wrote to memory of 3988	1452	file.exe	82
PID 3988 wrote to memory of 208	3988	is-OGF2I.tmp	83
PID 3988 wrote to memory of 208	3988	is-OGF2I.tmp	83
PID 3988 wrote to memory of 208	3988	is-OGF2I.tmp	83
PID 208 wrote to memory of 3692	208	PrintFolders.exe	84
PID 208 wrote to memory of 3692	208	PrintFolders.exe	84
PID 208 wrote to memory of 3692	208	PrintFolders.exe	84
PID 208 wrote to memory of 5028	208	PrintFolders.exe	103
PID 208 wrote to memory of 5028	208	PrintFolders.exe	103
PID 208 wrote to memory of 5028	208	PrintFolders.exe	103
PID 5028 wrote to memory of 4964	5028	cmd.exe	105
PID 5028 wrote to memory of 4964	5028	cmd.exe	105
PID 5028 wrote to memory of 4964	5028	cmd.exe	105

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Users\Admin\AppData\Local\Temp\is-JBOEA.tmp\is-OGF2I.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-JBOEA.tmp\is-OGF2I.tmp" /SL4 $B0068 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1079032 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3988
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:208
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\49t7sRv8Zhhp.exe
      4⤵
      Executes dropped EXE
      PID:3692
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5028
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4964

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.4MB
SHA256 49f49c52de16244e3b14678cae32299c202605b1f7adcc252198e1d2688a55a2
MD5 47669fc358a244ecf7268a0560c912c1
SHA1 f6be270745fdf1e5a7d25516587bdd6b23195ab3
SHA512 4d268a53b76e797f79bebc183f6a115850a5482ebe99d963c638e4cf2844e8dd03a20ffeb628c65a9697cd3b7105d16193f1eebf97a1236c6e93641e89624f6f
SSDEEP 24576:8+BCQg+/+ybH+R+pM+ND+X+jLBVfkusW4tQ206Md5pLkILfk++hPIvduOtQB:ltpmy6ApVNaOfpsWE0t9LKIeB
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.4MB
SHA256 49f49c52de16244e3b14678cae32299c202605b1f7adcc252198e1d2688a55a2
MD5 47669fc358a244ecf7268a0560c912c1
SHA1 f6be270745fdf1e5a7d25516587bdd6b23195ab3
SHA512 4d268a53b76e797f79bebc183f6a115850a5482ebe99d963c638e4cf2844e8dd03a20ffeb628c65a9697cd3b7105d16193f1eebf97a1236c6e93641e89624f6f
SSDEEP 24576:8+BCQg+/+ybH+R+pM+ND+X+jLBVfkusW4tQ206Md5pLkILfk++hPIvduOtQB:ltpmy6ApVNaOfpsWE0t9LKIeB
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-631J4.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-OGF2I.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-JBOEA.tmp\is-OGF2I.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-OGF2I.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-JBOEA.tmp\is-OGF2I.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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49t7sRv8Zhhp.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\49t7sRv8Zhhp.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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49t7sRv8Zhhp.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\49t7sRv8Zhhp.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/208-142-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/208-150-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/208-143-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/208-156-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/208-144-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/208-149-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/208-148-0x0000000000400000-0x0000000001372000-memory.dmp

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memory/1452-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1452-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1452-157-0x0000000000400000-0x0000000000413000-memory.dmp

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